Male form
- Nominative
- Seán Ó Duibhir
- Genitive
- Sheáin Uí Dhuibhir
- Vocative
- a Sheáin Uí Dhuibhir
Wife form
- Nominative
- Síle Uí Dhuibhir
- Genitive
- Shíle Uí Dhuibhir
- Vocative
- a Shíle Uí Dhuibhir
Daughter form
- Nominative
- Síle Ní Dhuibhir
- Genitive
- Shíle Ní Dhuibhir
- Vocative
- a Shíle Ní Dhuibhir
Male form
- Nominative
- Seán Ó Duibhidhir
- Genitive
- Sheáin Uí Dhuibhidhir
- Vocative
- a Sheáin Uí Dhuibhidhir
Wife form
- Nominative
- Síle Uí Dhuibhidhir
- Genitive
- Shíle Uí Dhuibhidhir
- Vocative
- a Shíle Uí Dhuibhidhir
Daughter form
- Nominative
- Síle Ní Dhuibhidhir
- Genitive
- Shíle Ní Dhuibhidhir
- Vocative
- a Shíle Ní Dhuibhidhir