Male form
- Nominative
- Seán Mac Colgan
- Genitive
- Sheáin Mhic Colgan
- Vocative
- a Sheáin Mhic Colgan
Wife form
- Nominative
- Síle Mhic Colgan
- Genitive
- Shíle Mhic Colgan
- Vocative
- a Shíle Mhic Colgan
Daughter form
- Nominative
- Síle Nic Colgan
- Genitive
- Shíle Nic Colgan
- Vocative
- a Shíle Nic Colgan
Male form
- Nominative
- Seán Mac Colgáin
- Genitive
- Sheáin Mhic Colgáin
- Vocative
- a Sheáin Mhic Colgáin
Wife form
- Nominative
- Síle Mhic Colgáin
- Genitive
- Shíle Mhic Colgáin
- Vocative
- a Shíle Mhic Colgáin
Daughter form
- Nominative
- Síle Nic Colgáin
- Genitive
- Shíle Nic Colgáin
- Vocative
- a Shíle Nic Colgáin