Root form: Duinnín
Irish-language surnames
Ó Duinnín, Uí Dhuinnín, Ní Dhuinnín
Male form
- Nominative
- Seán Ó Duinnín
- Genitive
- Sheáin Uí Dhuinnín
- Vocative
- a Sheáin Uí Dhuinnín
Wife form
- Nominative
- Síle Uí Dhuinnín
- Genitive
- Shíle Uí Dhuinnín
- Vocative
- a Shíle Uí Dhuinnín
Daughter form
- Nominative
- Síle Ní Dhuinnín
- Genitive
- Shíle Ní Dhuinnín
- Vocative
- a Shíle Ní Dhuinnín
English-language surnames
- Dineen
- Dinneen
Alternative English-language surnames
- Downing
- Dunning