| Saint | Background | Date | Feast Day |
| Mabenna/Mabyn/Mabin | dau Brychan nun in Cornwall | 21/09 18/11 | |
| Macanisius | Bishop of Connor and Down | 10/09 | |
| Macarius | 06/04 | ||
| Macarius | 12/08 | ||
| Macarius/Macharius | 23/01 24/01 | ||
| Macarius | Abbot | 09/05 | |
| Macarius | Bishop of Comminges | 01/05 | |
| Macarius | Bishop of Jerusalem | d334 | 10/03 |
| Macarius of Melitene | 05/09 | ||
| Macarius the Elder | 16/01 15/01 | ||
| Macarius the Younger | Alexandria | C4th | 02/01 |
| Macarius/Makarios/Machar/ Mochonnan/Mochrieba | Bishop of Aberdeenshire | 12/11 | |
| Macartan/Mackartin/ MacCartin/Maccarthen | Bishop of Clogher/Ard | d505 | 24/03 15/08 |
| Maccai/Machai | Abbot of Bute | 11/04 | |
| Macculin(dus) | Bishop of Lusk | 06/09 | |
| Maccutinus | Ireland | 08/06 | |
| Macedonius | 13/03 | ||
| Macedonius | 24/01 | ||
| Machan | Bishop in Scotland | 28/09 | |
| Machudd of Anglesey | Abbot of Llanfechell | 15/11 | |
| Maclovius | 10/07 | ||
| Maclovius/Malo | of Wales Bishop of St. Malo | C6th | 15/11 14/11 |
| Macnisius/Macansius | Bishop of Connor | 03/09 | |
| Macra | 02/03 | ||
| Macra/Macara | virgin martyr Rheims | C3rd | 06/01 |
| Macrina the Elder | 14/01 | ||
| Macrina/Machrina the Younger | sister of Basil & Gregory, Pontus | 19/07 | |
| Macull/Maccail | Bishop of Croghan Ireland | 25/04 | |
| Madalveus/Magdalveus | Bishop of Verdun | 04/10 05/10 | |
| Madelberta | 07/09 | ||
| Madeleine Sophie Barat | Society of the Sacred Heart of Jesus | C19th | 25/05 |
| Maden/Madron/Madrun/Madern/Medran | Wales/ Cornwall | C5th/6th | 17/05 08/04 |
| Maeliosa | 16/01 | ||
| Maelrhys | of Bardsey Island | 01/01 | |
| Maelrubha/Malrubius/Malrubbus | Abbot of Applecross Skye | d722 | 22/08 21/04 (28/08) |
| Maethlu | of Anglesey | 26/12 | |
| Magdalen | 13/10 | ||
| Magdalen | 15/05 | ||
| Maglorius/Magloire | Bishop of Dol | 24/10 | |
| Magnanius (Mawnan) | Abbot of Kilmainham | C7th | 18/12 |
| Magnericus | Bishop of Trier | 25/07 | |
| Magnobodus | Bishop of Angers | 16/10 | |
| Magnus | 01/01 | ||
| Magnus | of Fussa/Fussen | C6th | 06/09 |
| Magnus | of Orkney | C12th | 16/04 (Trans 13/12) |
| Magorianus | 15/03 | ||
| Maguil | 30/05 | ||
| Maharsapor | Persia | 10/10 (27/11) | |
| Maianus | 01/06 | ||
| Maidoc | Abbot of Fiddown | 23/03 | |
| Maidoc | Bishop | 28/02 | |
| Maidulf | Abbot of Malmesbury | 17/05 | |
| Maimbod | (of Ireland) Besançon | 23/01 | |
| Mainchin/Munchin | Bishop of Limerick | C7th | 02/01 |
| Mainchin | 13/01 | ||
| Mainchin | 14/02 | ||
| Mainchin | 23/03 | ||
| Mainchin | 01/05 | ||
| Mainchin | 21/10 | ||
| Mainchin | 12/11 | ||
| Mainchin | 02/12 | ||
| Mainchin | 04/12 | ||
| Mainchin | 29/12 | ||
| Majolus | Abbot of Cluny | 11/05 | |
| Malachi | 20/08 | ||
| Malachi/Malachy O'More | Bishop of Armagh & Down | 1094-1148 | 03/11 05/11 |
| Malard | Bishop of Chartres | 15/01 | |
| Malchus | of Chalcis | 21/10 | |
| Maldegar | 14/07 | ||
| Mamas | Caesarea | C3rd | 17/08 |
| Mamertinus + Marian(us)/Marcian | Abbot at Auxerre
Monk at Auxerre |
20/04 | |
| Mamertus | Bishop of Vienne | 11/05 10/05 | |
| Mammas | 18/07 (Trans 10/10) | ||
| Manacca | Abbess of Cornwall | 14/10 | |
| Manaccus/Manakus | Abbot of Caer Gybi/Holyhead | C6th | 14/10 03/08 |
| Maneheldis | of Champagne | 14/10 | |
| Manire/Manirus/Monirus/Niniar | Bishop of Aberdeenshire & Banff | 18/12 19/12 | |
| Mansuetis | Bishop of Milan | 19/02 | |
| Mansuetus | Bishop of Toul | 03/09 14/06 | |
| Manveus | Bishop of Brieuc | 28/05 | |
| Maodhog | 11/04 | ||
| Maolmhuire | 03/07 | ||
| Maolmhuire | 24/12 | ||
| Mappalicus/Mapolice | 18/04 | ||
| Marcealis | 28/09 | ||
| Marcel + comps | 06/10 | ||
| Marcella | 28/06 | ||
| Marcella | Widow/martyr, Rome | 325-410 | 31/01 |
| Marcellianus | Bishop of Auxerre | 13/05 | |
| Marcellina | Sister of St Ambrose, nun, Gaul/Rome | C4th | 17/07 |
| Marcellinius | of Ravenna | 05/10 | |
| Marcellinus | d374 | 20/04 | |
| Marcellinus | Martyr | d413 | 06/04 |
| Marcellinus | Pope | C3rd | 26/04 |
| Marcellinus | Comp of Peter | 02/06 | |
| Marcellus + Apuleius | 07/10 | ||
| Marcellus + Valerian | Lyons or Treves | 04/09 | |
| Marcellus | 12/04 | ||
| Marcellus | 14/08 | ||
| Marcellus | 21/02 | ||
| Marcellus | 21/04 | ||
| Marcellus | 26/11 | ||
| Marcellus | 29/12 | ||
| Marcellus | of St. Gall | 27/09 | |
| Marcellus | Pope | C4th | 16/01 |
| Marcellus | the Centurion | d298 | 30/10 |
| Marcellus/Marcel | Bishop of Paris | C5th | 03/11 26/07 01/11 (Octave 08/11) |
| Marcellus/Marcel | Gaul | d274 | 29/06 |
| Marcia | 05/06 | ||
| Marcia | 06/04 | ||
| Marcian | 10/01 | ||
| Marcian(us) | of Cyrrhus | 02/11 | |
| Marciana | virgin martyr | 09/01 | |
| Marcolino | of Forli | 24/01 | |
| Marculf/Marcoul | Abbot & missionary, Gaul | C6th | 01/05 |
| Margaret | 02/04 | ||
| Margaret | 02/09 | ||
| Margaret | 06/11 | ||
| Margaret |
See 'Pelagia' |
08/10 | |
| Margaret | 23/11 | ||
| Margaret | 27/08 | ||
| Margaret, Blessed | Citta-del-Castello | b c1290 | |
| Margaret Clitherow | English martyr | 1556-86 | 26/03 (21/10) |
| Margaret Colonna | 30/12 | ||
| Marguerite D'Youville, Blessed (Marie Marguerite Dufrost de La Jemmerais) | widow & Grey Nun, Canada | C18th | 23/12 |
| Margaret Mary Alacoque | Visitation nun, Burgundy | 1647-90 | 17/10 (16/10) |
| Margaret of Antioch (Marina) | Semi-legendary martyr, one of 14 Holy Helpers | C4th | 20/07 (Orth 13/07) |
| Margaret of Cortona | Confraternity of Our Lady of Mercy | 1247-97 | 22/02 21/02 |
| Margaret of England | 03/02 | ||
| Margaret of Hungary | dau Bela IV, Dominican nun | 26/01, 28/01 (Death 18/01) | |
| Margaret of Lorraine | 02/11 | ||
| Margaret of Ravenna | 23/01 | ||
| Margaret of Scotland | wife of King Malcolm III Canmore | 1045-93 | 16/11 10/06 (Trans 19/06 |
| Margaret Pole | Countess of Salisbury | 28/05 | |
| Margaret | virgin martyr | 12/07 15/07 19/07 | |
| Margaret Ward + John Roche, Blessed | martyrs of London | d1588 | 30/08 |
| Marguerite Bourgeoys/Bourjeoys | missionary, Congregation of Notre Dame, Canada | 1620-1700 | 19/01 (Canada 12/01) |
| Maria Anne de Parades | 02/06 | ||
| Maria Crosifissa di Rosa (Paula Frances Mary di Rosa) | Handmaids of Charity, Brescia | 1813-55 | 15/12 |
| Maria Goretti | Raped & killed by a neighbour, Alexander | 1890-1902 | 06/07 |
| Maria Magdalena de' Pazzi | 25/05 | ||
| Maria Michaela Desmaisieres | Spain, Handmaids of the Blessed Sacrament and of Charity | 1809-65 | 25/08 |
| Maria (Rose Virginie Pelletier/Euphrasia Pelletir) | of St Euphrasia | 1796-1868 | 24/04 |
| Maria Soledad (Vibiana Torres) | Madrid, nun | 1862-9 | 18/01 |
| Marian + James | 06/05 | ||
| Mariana of Quito | 'the Lily of Quito' Ecuador/Peru | d1645 | 28/05, 26/05 |
| Marianus | 03/11 | ||
| Marianus | 19/09 | ||
| Marianus | 28/10 | ||
| Marianus Scotus, Blessed | 09/02 | ||
| Marie-Rose (Eulalie) Durocher, Blessed | Sisters of the Holy Names of Jesus and Mary, Canada | 1811-49 | 06/10 |
| Marina | virgin, Bithynia | C8th | 18/06, 12/02 (Trans 18/07) |
| Marinus + Asterius | 03/03 | ||
| Marinus | 03/07 | ||
| Marinus | 20/07 | ||
| Marinus, Castus + Maximus | 04/09 | ||
| Marinus | San Marino | 04/09 | |
| Marius/May/Mere/Maire | Abbot of La-Val-Benois | d555 | 27/01 |
| Marius | 31/12 | ||
| Marius, Martha + sons (Audifax + Abachum) | 19/01 | ||
| Mark | 10/04 | ||
| Mark | 16/01 | ||
| Mark, Alphius, Alexander + comps | 28/09 | ||
| Mark | Bishop of Arethusa | 29/03 | |
| Mark | Bishop of Jerusalem | 22/10 | |
| Mark | of Modena | 23/09 | |
| Mark | Pope | C4th | 07/10 (06/10) |
| Mark the Evangelist | Writer of 2nd Gospel | C1st | 25/04 31/01 |
| Mark/Marcus + Marcellian(us) | 18/06 | ||
| Mark/Marcus, Marcian(us) + comps | 04/10 | ||
| Marnanus//Marman/Marnoc | Bishop of Annandale | 01/03 02/03 | |
| Maro | Hermit, Cyrrhus in Syria | 14/02 | |
| Marsus | 04/10 | ||
| Martha | Hostess of Jesus, Bethany | C1st | 29/07 (27/07, 26/08, Trans 17/10) |
| Martha, Saula + comps | 20/10 | ||
| Martial | 02/07 | ||
| Martial | 1st Bishop of Limoges | C3rd | 30/06 |
| Martial Laurence Ruiz + comps | 28/09 | ||
| Martialis | 07/07, 16/06 (Trans 10/10) | ||
| Martiana | 02/11 05/11 | ||
| Martin | 04/08 | ||
| Martin | 06/10 | ||
| Martin | 08/05 | ||
| Martin | 15/11 | ||
| Martin | 20/03 | ||
| Martin | Abbot of Vertou | 24/10 | |
| Martin | Bishop of Trier | 19/07 | |
| Martin de Porres | Dominican lay brother, Lima | 1579-1639 | 03/11 (05/11) |
| Martin I | Pope | d 655 | 13/04 (10/11 12/11 27/11) |
| Martin of Loen | 12/01 | ||
| Martin of Saintes | 07/12 | ||
| Martin/Marin | Bishop of Tours | c315-97 | 11/11 (Martinmas) 01/12, Trans/Ord 04/07, Subvention 12/05, Octave 18/11 |
| Martina | 01/01 | ||
| Martina | 30/01 | ||
| Martina | early Roman martyr | 12/01 | |
| Martinian | of Milan | 02/01 | |
| Martinian | One of 7 Sleepers of Ephesus | d250 | 27/07 |
| Martinianus | Hermit at Athens | 13/02 | |
| Marus | Bishop of Trier | 26/01 | |
| Maruthas | Syria | C5th | 04/12 |
| Mary + Martha | 20/01 | ||
| Mary | 04/08 | ||
| Mary | 16/12 | ||
| Mary | 19/09 | ||
| Mary de le Cabeza, Blessed | 09/09 | ||
| Mary James + Mary Salome + | Carmelites | 25/05 22/10 | |
| Mary Magdalen (Julia Frances Catherine) Postel | Sisters of the Christian Schools of Mercy, France | C19th | 16/07 (24/05) |
| Mary Magdalene | Biblical penitent | C1st | 22/07 (Conversion 01/03 01/04 10/03 Trans 19/03) |
| Mary Magdalene | of Pazzi, Carmelite nun, Florence | 1566-1607 | 29/05 |
| Mary Mancini | 28/01 | ||
| Mary Mazzarello | 14/05 | ||
| Mary of Egypt | hermitess in Jordan | C5th | 02/04 (07/08 08/04) |
| Mary of Oignies | 23/06 | ||
| Mary of Rome | 01/11 | ||
| Mary Soledad | 11/10 | ||
| Mastidia | virgin Troyes | 07/05 | |
| Maternianus | 07/07 | ||
| Maternus | Bishop of Milan | 18/07 | |
| Maternus | Bishop of Trier | 13/09 14/09 19/09 (Trans 23/10) | |
| Mathurin | 16/09 | ||
| Mathurin | C2nd | 01/11 | |
| Matilda/Mathilda | 07/02 | ||
| Matilda/Mathilda of Bayern | wife of HRE Henry I | d968 | 14/03 |
| Matrona | Matrona, Portuguese noblewoman, died in Capua | 15/03 (16/03) | |
| Matrona of Thessalonica | Roman servant persecuted by her mistress | Orth 27/03 | |
| Matthew | 07/10 | ||
| Matthew | Bishop of Jerusalem | 30/01 | |
| Matthew, Blessed | of Mount Massaccio | 11/09 | |
| Matthew/Matthias (Levi) | Apostle & Evangelist | 21/09 (06/05 29/02 24/02, Vigils 20/09 & 23/02) | |
| Matthias | Apostle who replaced Judas | 14/05 | |
| Matt Talbot, Venerable | reformed drunkard | 1856-1925 | 07/06 |
| Maturinus | 09/11 (Trans 10/05) | ||
| Maudetus | 17/11 18/11 | ||
| Maughold | 27/04 | ||
| Maughold | Bishop in Ireland | 28/12 | |
| Maughold/Maccald/Machalus | Bishop of Isle of Man | 25/04 15/11 31/07 | |
| Maura + Brigid/Britt | Daus Scot. Chieftain martyrs in Picardy on pilgrimage to Rome | 02/11, 28/01 | |
| Maura | 03/05 | ||
| Maura | 15/01 | ||
| Maura | 30/11 | ||
| Maura of Troyes | pious virgin | d825-50 | 21/09 |
| Maurice + comps | the Theban Legion | c287 | 22/09 |
| Maurice | 02/12 | ||
| Maurice | 21/02 | ||
| Maurice | 21/11 | ||
| Maurice | C3rd | 21/09 | |
| Maurilius | Bishop of Angers | 13/09 16/08 (Trans 15/0119/10) | |
| Maurinus | 10/06 | ||
| Mauritius + comps | 25/02 (Advent of his head 28/09 Revelation 26/10) | ||
| Maurontus | Abbot | 05/05 | |
| Maurontus/Marontus | Bishop of Marseilles | 21/10 | |
| Maurus + comps | 22/08 | ||
| Maurus | 05/10 (orig 15/01) | ||
| Maurus | 21/11 (Trans 12/03) | ||
| Maurus | Bishop of Five Churches | 01/12 | |
| Maurus | Bishop of Cesena | d946 | 20/01 |
| Maurus | Bishop of Verdun | 10/11 | |
| Maurus, Salvinus + Arator | Bishops of Verdun | (Translation) 04/09 | |
| Maw | 17/05 | ||
| Mawes | 18/11 | ||
| Mawgan | C5th | 08/08 | |
| Mawnan | 17/12 | ||
| Maxellendis | 13/11 | ||
| Maxentia | mother of Vigilius | 30/04 (Trans 12/11) | |
| Maxentia | of Ireland | 20/11 | |
| Maxentius | Abbot | 26/06 | |
| Maxentius | Bishop of Poitiers | 26/06 | |
| Maxima | Virgin | 16/05 | |
| Maxima + comps (Martinian, Saturian + 2 bros) | slaves martyred in Africa | 16/10 | |
| Maximian | of Numidia | 03/10 | |
| Maximian | Patriarch of Constantinople | (Orth) 21/04 | |
| Maximian | One of 7 Sleepers of Ephesus | d250 | 27/07 |
| Maximilian | 12/03 | ||
| Maximilian | 29/10 | ||
| Maximilian | Bishop of Lorch | 12/10 | |
| Maximilian Kolbe | Franciscan priest killed in Auschwitz | 1894-1941 | 14/08 |
| Maximilian of Palermo | 15/09 | ||
| Maximinus | 07/04 | ||
| Maximinus | 08/06 | ||
| Maximinus | 15/12 | ||
| Maximinus | Abbot of Lerins | d462 | 27/11 |
| Maximinus | Bishop of Aix | 07/06 | |
| Maximinus | Bishop of Tongres & Trier | d349 | 29/05 30/05 20/06 (Deposition 12/09 Trans 29/03) |
| Maximus + Venerandus | 25/05 | ||
| Maximus | 14/04 | ||
| Maximus | 19/10 | ||
| Maximus | 19/11 | ||
| Maximus | 20/05 | ||
| Maximus | 20/08 | ||
| Maximus | 23/03 | ||
| Maximus | 28/09 | ||
| Maximus | 30/04 | ||
| Maximus | 30/12 | ||
| Maximus | Bishop | 29/05 | |
| Maximus | Bishop of Reji | 02/10 04/12 (Invention 13/09 | |
| Maximus | Bishop of Turin | 25/06 | |
| Maximus | Of Aquila | 20/10 | |
| Maximus | The Confessor | 13/08 | |
| Maximus, Theodore + Scelpiodotus | 15/09 | ||
| Maximus/Mondain | 26/03 | ||
| Mazota | Virgin of Abernethy | 23/12 | |
| Meadhbh | 22/11 | ||
| Meallan | 06/12 | ||
| Meallan/Mellan | Of Kilrush | 28/01 | |
| Mechtildes | 10/04 | ||
| Mechtildis | Of Edelstetten | 31/05 | |
| Medana | Of Galloway | 19/11 12/11 | |
| Medard | Bishop of Noyon | (Revelation) 09/09 | |
| Medard of Soissons | Medard of Soissons, Bishop of Tournai/ Vermandois | c470-561 | 08/06 |
| Medericus/Merry | Abbot of St Martin's, Autun | d700 | 29/08 |
| Medran + Oudran | Muskerry Ireland | 07/07 | |
| Medulf | Bishop of Auvergne | 01/06 | |
| Medwin/Mydwyn | England | 01/01 | |
| Meginrad/Meinrad | hermit at Einsiedeln, Switzerland | d861 | 21/01 (Trans 06/10) |
| Meingold | C9th | 08/02 | |
| Meinulph/Meinulf | of Bodeken | 05/10 | |
| Mel | Bishop of Ardagh | d 487 | 06/02 |
| Mel | of Bardsey Island | 13/05 | |
| Melangell | virgin Wales | 27/05 | |
| Melania the Elder | d 410 | 08/06 | |
| Melania the Younger | Roman wife/widow & nun | d 439 | 31/12 |
| Melanie/Melania | 18/06 | ||
| Melanius/Melaine | Bishop of Rennes | C6th | 06/01 (11/10 06/11) |
| Melas | 16/01 | ||
| Melchus + Munis | Bishops of Lough Lee | 06/02 | |
| Meletius/Melitos | Bishop of Antioch | 12/02 | |
| Melitina | of Marcianopolis | 15/09 | |
| Melitius | of Cyprus | 21/09 | |
| Melito | Bishop of Sardes/Sardis | C2nd | 01/04 |
| Mella | Abbess of Doire-Melle Leitrim mother of Cannech and Tigernach | 25/04 | |
| Mellitus | Archbishop of Canterbury | 24/04 | |
| Mellon(us)/Mallonius | Bishop of Rouen | d341 | 22/10 |
| Melor/Mylor | of Cornwall | C6th | 01/10 |
| Melorus | Martyr | 06/05 | |
| Memmius | Bishop of Chalons-sur-Marne | 05/08 16/12 | |
| Memnon | the Wonderworker | (Orth) 28/04 | |
| Memorius | 07/09 | ||
| Menas | of Libya | C3rd | 11/11 |
| Menas/Menais + comps | England | 01/08 | |
| Menefritha | of Cornwall dau Brychan | 24/07 | |
| Meneleus | 22/07 | ||
| Menna | of Lorraine | 03/10 | |
| Mennas | 06/11 | ||
| Menodora, Metrodora + Nympyodora | 10/09 | ||
| Menulf | 12/07 | ||
| Mercurius | 20/12 | ||
| Mercurius/Mercury | C3rd | 26/11 27/11 25/11 | |
| Merewenna | 29/10 | ||
| Meriadoc/Meriadec | Bishop of Vannes | C7th | 07/06 |
| Meriasek | Bishop of Camborne | 07/06 03/06 | |
| Merililaun | of Britain martyr Rheims | 18/05 | |
| Merinus | the Hermit | 06/01 | |
| Mernocus/Marnock (Ernene) | Bishop of Kilmarnock | 08/18 25/10 | |
| Merodius | 26/09 | ||
| Merryn/Merin | Cornwall and Brittany | C6th | 04/04 |
| Merwenna | of Bude dau St Brychan | 12/08 | |
| Merwenna/Merwinna | Abbess of Romsey/Rumsey | 13/05 10/02 | |
| Methodios | Bro of Cyril, missionary to the Slavs | d885 | 06/04 14/02 (Orth 11/05) |
| Methodius | Bishop of Constantinople | d847 | 14/06 |
| Methodius | Bishop of Tyre | 18/09 | |
| Metrannus | 31/01 | ||
| Metronus | 08/05 | ||
| Metropolus | Bishop of Trier | 08/10 | |
| Meuris + Thea | 19/12 | ||
| Mevennus/Meen/Mewan | Wales | C6th | 21/06 |
| Mewrog | of Denbighshire | 25/09 | |
| Micah | Biblical | 15/01 | |
| Michael | 01/09 | ||
| Michael | 05/07 | ||
| Michael Abba Ghebra | 28/07 | ||
| Michael de Sanctis | Trinitarian monk, Spain | 1591-1625 | 10/04 |
| Michael Garicoits | Priest | 1797-1863 | 14/05 |
| Michael | Metropolitan of Kiev | d992 | (Orth) 30/09 |
| Michael | of Chernigov | 21/09 | |
| Michael/Miguel Pro, Blessed | Mexican Jesuit | b1891 | 23/11 |
| Michael the Archangel | Biblical | 29/09 + All Angels, 17/10 (Apparition on Monte Gargano 08/05, Dedication of Monte Tumba 16/10 | |
| Michael the Soldier/ the Bulgarian | of Potouka/Batak | C9th/10th | (Orth) 22/11 |
| Michelina/Michelle | 20/06 | ||
| Midan | of Anglesey | 30/09 | |
| Mildburga/Milburga/Milburgh | Abbess of Much Wenlock | d722 | 23/02 25/06 |
| Mildgyth(a)/Milgitha/Myldgytha | Abbess of Minster | 17/01 | |
| Mildred/Mildrada of Thanet | Abbess of Minster | d c700 | 20/02 (Trans 13/07) |
| Miles Gerard | Rochester | d1590 | 30/04 |
| Miletus | Bishop of Trier | ||
| Milles, Ambrosimus + Sina | 10/11 | ||
| Miltiades/Melchiades | Pope | d314 | 10/12 19/12 |
| Minervus + Eleazarus with their 8 children | 23/08 | ||
| Mineve | 22/07 | ||
| Miniatis | 25/10 | ||
| Minver/Mynver | of Cornwall | 24/11 | |
| Miren/Muirgen | 27/01 | ||
| Mirrin/Merinus | of Bangor/Belchor Abbot of Paisley | 15/09 | |
| Mitrius | 13/11 (Trans 24/10) | ||
| Mochaoi/Melray | Abbot of Nendruim | C6th | 23/06 |
| Mochelloc | Abbot of Kilmallock Ireland | 26/03 | |
| Mocheomoc/Mochoemog/Pulcherius | Abbot of Liathmor/Lauth | d655 | 13/03 |
| Mochta | of Louth | 19/08 | |
| Mochua | 24/12 | ||
| Mochua | monk of Balla Connaught | 01/01 | |
| Mochua | of Ireland | 11/04 | |
| Modan | Abbot of Stirling Falkirk and Melrose | 04/02 | |
| Modan | of Killmodan | 30/08 | |
| Modan(us)/Modanic | Bishop of Fraserburgh | 14/11 | |
| Moderannus | Bishop of Rennes | 22/10 Trans 15/05 | |
| Modesta | 04/11 | ||
| Modmund | martyr Gloucester | 20/07 | |
| Modoald | Bishop of Trier | 12/05 | |
| Modoc/Madoc | Abbot of Glyn Rhosyn Bishop of Wexford | C7th | 31/01 |
| Modomnoc | of Ossory | C6th | 13/02 |
| Modwen(n)a/Monenna | Abbess of Burton-on-Trent | 05/07 06/07 | |
| Modwenna | 09/09 | ||
| Modwenna | Abbess of Polesworth | d c900 | 05/07 |
| Modwenna | Abbess of Whitby | d c695 | 05/07 |
| Moghtewe | Abbot in Ireland | 21/08 | |
| Moibhi the Teacher | Ireland | d545 | 12/10 |
| Molagga | Abbot of Fermoy | 20/01 | |
| Molaug/Molloch/Moloc/Lugaid | Bishop of Mortlach Scotland | 25/06 | |
| Moling(us)/Dairchilla | Bishop of Ferns | 17/06 | |
| Molonachus | Bishop of Lismore | 25/06 | |
| Molua (Luan) | 03/08 04/08 | ||
| Mommolem | Bishop of Noyon | 16/10 | |
| Mommolus | 08/08 | ||
| Monacella | virgin Wales | 31/01 | |
| Monan | Archdeacon of Saint Andrew's martyred by Danes | C9th | 01/03 |
| Monegundes/is | 02/07 01/07 | ||
| Monessa | of Ireland | 04/09 | |
| Monica | mother of St. Augustine | c332-87 | 27/08 (04/05 08/04) |
| Moninna/Moninne/Monnina/Darerca | of Kille(a)vy Abbess Siabh-Guillin | d518 | 06/07 |
| Mono(n) | of Scotland Martyr in Ardennes | 18/10 | |
| Montanus, Lucius, Flavian, Julian, Victoricus, Primolus, Rhenus + Donatian | 24/02 | ||
| Morand(us) | 03/06 | ||
| Morgan | of Cornwall | 26/09 | |
| Moroc | Bishop in Scotland | 08/11 | |
| Morwenna | dau Brychan Cornwall | C6th | 05/07 08/07 |
| Moses | d372 | 07/02 | |
| Moses the Ethiopian | Slave & priest, killed by Bedouin | d c395-4400 | |
| Moses | of Rome | 25/11 | |
| Moses the Patriarch | 04/09 | ||
| Mstislav-Harold-Theodore | Prince of Kiev son of Gytha d Harold II of Eng | 15/04 | |
| Muadhnat/Mona | 06/01 | ||
| Muireadhach | 13/08 | ||
| Muireadhach | 15/05 | ||
| Muiredach | d 1088 | 09/01 | |
| Muredach/Murtagh | Bishop of Killala | c480 | 12/08 |
| Munde/Mundus | Abbot of Argyle | 15/04 | |
| Muran | Abbot of Fathinis Ireland | 12/03 | |
| Murdoc the Culdee | Argyleshire | 05/10 | |
| Myron | C3rd | 17/08 |
This collection of names was compiled by Kate Monk and is ©1997, Kate Monk.
Copies may be made for personal use only.