Root form: Dubh
Irish-language surnames
Mac Dhuibh, Mhic Dhuibh, Nic Dhuibh
Male form
- Nominative
- Seán Mac Dhuibh
- Genitive
- Sheáin Mhic Dhuibh
- Vocative
- a Sheáin Mhic Dhuibh
Wife form
- Nominative
- Síle Mhic Dhuibh
- Genitive
- Shíle Mhic Dhuibh
- Vocative
- a Shíle Mhic Dhuibh
Daughter form
- Nominative
- Síle Nic Dhuibh
- Genitive
- Shíle Nic Dhuibh
- Vocative
- a Shíle Nic Dhuibh
English-language surnames
- Cuffe