Root form: Fathach
Irish-language surnames
Ó Fathaigh, Uí Fhathaigh, Ní Fhathaigh
Male form
- Nominative
- Seán Ó Fathaigh
- Genitive
- Sheáin Uí Fhathaigh
- Vocative
- a Sheáin Uí Fhathaigh
Wife form
- Nominative
- Síle Uí Fhathaigh
- Genitive
- Shíle Uí Fhathaigh
- Vocative
- a Shíle Uí Fhathaigh
Daughter form
- Nominative
- Síle Ní Fhathaigh
- Genitive
- Shíle Ní Fhathaigh
- Vocative
- a Shíle Ní Fhathaigh
English-language surnames
- Fahy
Alternative English-language surnames
- Green