Family name origins & meanings
- Scottish and northern Irish : Anglicized form of Gaelic Mac Gille Uidhir (Scottish), Mac Giolla Uidhir (Irish), probably ‘son of the sallow lad’.
- Scottish and northern Irish : Anglicized form of Scottish Gaelic Mac Gille Dheòradha, Irish Mac Giolla Dheóradha ‘son of the servant of the pilgrim’.