Old Irish format

← Proto-Celtic *uɸormantom (inherited)

← Proto-Indo-European *men- (root)

← Proto-Indo-European *upér (derived)

← Proto-Indo-European *men- (mention)

→ Irish formad (inherited)

→ Irish Diarmaid (mention)

→ Scottish Gaelic farmad (inherited)

→ Old Irish foirmtech (affix)

→ Old Irish Diarmait (affix)

→ Old Irish Diarmait (mention)