Male form
- Nominative
- Seán Ó Cathláin
- Genitive
- Sheáin Uí Chathláin
- Vocative
- a Sheáin Uí Chathláin
Wife form
- Nominative
- Síle Uí Chathláin
- Genitive
- Shíle Uí Chathláin
- Vocative
- a Shíle Uí Chathláin
Daughter form
- Nominative
- Síle Ní Chathláin
- Genitive
- Shíle Ní Chathláin
- Vocative
- a Shíle Ní Chathláin
Male form
- Nominative
- Seán Ó Cathaláin
- Genitive
- Sheáin Uí Chathaláin
- Vocative
- a Sheáin Uí Chathaláin
Wife form
- Nominative
- Síle Uí Chathaláin
- Genitive
- Shíle Uí Chathaláin
- Vocative
- a Shíle Uí Chathaláin
Daughter form
- Nominative
- Síle Ní Chathaláin
- Genitive
- Shíle Ní Chathaláin
- Vocative
- a Shíle Ní Chathaláin