Male form
- Nominative
- Seán Ó Dufaigh
- Genitive
- Sheáin Uí Dhufaigh
- Vocative
- a Sheáin Uí Dhufaigh
Wife form
- Nominative
- Síle Uí Dhufaigh
- Genitive
- Shíle Uí Dhufaigh
- Vocative
- a Shíle Uí Dhufaigh
Daughter form
- Nominative
- Síle Ní Dhufaigh
- Genitive
- Shíle Ní Dhufaigh
- Vocative
- a Shíle Ní Dhufaigh
Male form
- Nominative
- Seán Ó Dubhthaigh
- Genitive
- Sheáin Uí Dhubhthaigh
- Vocative
- a Sheáin Uí Dhubhthaigh
Wife form
- Nominative
- Síle Uí Dhubhthaigh
- Genitive
- Shíle Uí Dhubhthaigh
- Vocative
- a Shíle Uí Dhubhthaigh
Daughter form
- Nominative
- Síle Ní Dhubhthaigh
- Genitive
- Shíle Ní Dhubhthaigh
- Vocative
- a Shíle Ní Dhubhthaigh