Old Irish dún

← Proto-Celtic *dūnom (inherited)

← Old Irish do (mention)

← Old Irish sinn (mention)

→ Irish dún (inherited)

→ Irish urdhún (mention)

→ Scottish Gaelic dùn (inherited)

→ Manx doon (inherited)

→ Old Irish dúnad (link)

→ Old Irish dúnaid (mention)