Root form: Giolla Dhuibh
Irish-language surnames
Mac Giolla Dhuibh, Mhic Giolla Dhuibh, Nic Giolla Dhuibh
Male form
- Nominative
- Seán Mac Giolla Dhuibh
- Genitive
- Sheáin Mhic Giolla Dhuibh
- Vocative
- a Sheáin Mhic Giolla Dhuibh
Wife form
- Nominative
- Síle Mhic Giolla Dhuibh
- Genitive
- Shíle Mhic Giolla Dhuibh
- Vocative
- a Shíle Mhic Giolla Dhuibh
Daughter form
- Nominative
- Síle Nic Giolla Dhuibh
- Genitive
- Shíle Nic Giolla Dhuibh
- Vocative
- a Shíle Nic Giolla Dhuibh
English-language surnames
- Kilduff
Alternative English-language surnames
- McElduff
- Black