Male form
- Nominative
- Seán Ó Duíginn
- Genitive
- Sheáin Uí Dhuíginn
- Vocative
- a Sheáin Uí Dhuíginn
Wife form
- Nominative
- Síle Uí Dhuíginn
- Genitive
- Shíle Uí Dhuíginn
- Vocative
- a Shíle Uí Dhuíginn
Daughter form
- Nominative
- Síle Ní Dhuíginn
- Genitive
- Shíle Ní Dhuíginn
- Vocative
- a Shíle Ní Dhuíginn
Male form
- Nominative
- Seán Ó Duibhginn
- Genitive
- Sheáin Uí Dhuibhginn
- Vocative
- a Sheáin Uí Dhuibhginn
Wife form
- Nominative
- Síle Uí Dhuibhginn
- Genitive
- Shíle Uí Dhuibhginn
- Vocative
- a Shíle Uí Dhuibhginn
Daughter form
- Nominative
- Síle Ní Dhuibhginn
- Genitive
- Shíle Ní Dhuibhginn
- Vocative
- a Shíle Ní Dhuibhginn