Male form
- Nominative
- Seán Ó Dubhuí
- Genitive
- Sheáin Uí Dhubhuí
- Vocative
- a Sheáin Uí Dhubhuí
Wife form
- Nominative
- Síle Uí Dhubhuí
- Genitive
- Shíle Uí Dhubhuí
- Vocative
- a Shíle Uí Dhubhuí
Daughter form
- Nominative
- Síle Ní Dhubhuí
- Genitive
- Shíle Ní Dhubhuí
- Vocative
- a Shíle Ní Dhubhuí
Male form
- Nominative
- Seán Ó Duíbhí
- Genitive
- Sheáin Uí Dhuíbhí
- Vocative
- a Sheáin Uí Dhuíbhí
Wife form
- Nominative
- Síle Uí Dhuíbhí
- Genitive
- Shíle Uí Dhuíbhí
- Vocative
- a Shíle Uí Dhuíbhí
Daughter form
- Nominative
- Síle Ní Dhuíbhí
- Genitive
- Shíle Ní Dhuíbhí
- Vocative
- a Shíle Ní Dhuíbhí