The story
- Irish · derived fromÓ Dúnáin“descendant of Dúnán”
- English todayDoonan
Reduced Anglicized form of Irish Ó Dúnáin (“descendant of Dúnán”), a hypocoristic form of an unknown name beginning with the element dun (“fortress”).
Etymology from Wiktionary, CC BY-SA 4.0.