Male form
- Nominative
- Seán Mac Diarmada
- Genitive
- Sheáin Mhic Dhiarmada
- Vocative
- a Sheáin Mhic Dhiarmada
Wife form
- Nominative
- Síle Mhic Dhiarmada
- Genitive
- Shíle Mhic Dhiarmada
- Vocative
- a Shíle Mhic Dhiarmada
Daughter form
- Nominative
- Síle Nic Dhiarmada
- Genitive
- Shíle Nic Dhiarmada
- Vocative
- a Shíle Nic Dhiarmada
Male form
- Nominative
- Seán Ó Diarmada
- Genitive
- Sheáin Uí Dhiarmada
- Vocative
- a Sheáin Uí Dhiarmada
Wife form
- Nominative
- Síle Uí Dhiarmada
- Genitive
- Shíle Uí Dhiarmada
- Vocative
- a Shíle Uí Dhiarmada
Daughter form
- Nominative
- Síle Ní Dhiarmada
- Genitive
- Shíle Ní Dhiarmada
- Vocative
- a Shíle Ní Dhiarmada