Male form
- Nominative
- Seán Mac Fhinn
- Genitive
- Sheáin Mhic Fhinn
- Vocative
- a Sheáin Mhic Fhinn
Wife form
- Nominative
- Síle Mhic Fhinn
- Genitive
- Shíle Mhic Fhinn
- Vocative
- a Shíle Mhic Fhinn
Daughter form
- Nominative
- Síle Nic Fhinn
- Genitive
- Shíle Nic Fhinn
- Vocative
- a Shíle Nic Fhinn
Male form
- Nominative
- Seán Mag Fhinn
- Genitive
- Sheáin Mhig Fhinn
- Vocative
- a Sheáin Mhig Fhinn
Wife form
- Nominative
- Síle Mhig Fhinn
- Genitive
- Shíle Mhig Fhinn
- Vocative
- a Shíle Mhig Fhinn
Daughter form
- Nominative
- Síle Nig Fhinn
- Genitive
- Shíle Nig Fhinn
- Vocative
- a Shíle Nig Fhinn