With the spread of Christianity, bynames incorporating 'giolla' (servant) or 'maol' (follower or devotee) developed. These remain in use as surnames.
| Given Name and Variants | Diminutives | Meaning | 
| Gille Easbaig, Gilleasbaig, Archibald | Beistean, Beistan, Eairdsidh, Eairrsidh, Archy | servant of the bishop | 
| Gille Iosa, Gillies, Gillas | servant of Jesus | |
| Gille Naomh Naoimhean, Niven | servant of the saint | |
| Gille-Aindréis, Gille Anndrais, Gillanders | servant of St Andrew | |
| Gille-Brigte, Gille Brigde, Gileabart | servant of St Bridget | |
| Gille-Callíne | servant of | |
| Gille-Coimded | servant of | |
| Gille-Colaim | servant of | |
| Gille-Críst | servant of Christ | |
| Gille-Mícael, Gille-Míchéil, Gille-Míchél | servant of St. Michael | |
| Gille-Petair, Gilli-Petair | servant of St. Peter | |
| Mael-Bricín, Maíl-Bricín, Mal-Bricín | follower of | |
| Mael-Brigte, Maíl-Brigte, Mal-Brigte, Moíl-Brigte, Melbrigda | follower of St Bridget | |
| Mael-Féchín, Mael-Féichín, Mal-Féchín | follower of | |
| Mael-Giric, Mal-Girc | follower of | |
| Mael-Muire, Mal-Moire | follower of | |
| Mael-Petir, Mal-Petir | follower of St. Peter | |
| Mael-Snechta, Mal-Snecte | follower of | |
| Maíl-Choluim, Mael-Coluim, Mal-Colaim, Mal-Coloum, Mal-Coluim, Mal-Colum, Malcolm | follower of Columba | |
| Mal-æchín, Mal-échín | follower of | |
| Male-Domni | follower of | |
| Manchan | ||
| Maoilios | follower of Jesus | |
| Maol Diomhnaich, Mael-Domnig (Ludovic) | follower of the Lord | 
This collection of names was compiled by Kate Monk and is ©1997, Kate Monk.
Copies may be made for personal use only.