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