Old Irish sech

← Proto-Celtic *sekʷo- (inherited)

← Proto-Indo-European *sekʷ- (derived)

← Proto-Indo-European *sek- (mention)

→ Welsh heb (cognate)

→ Irish seach (inherited)

→ Scottish Gaelic seach (inherited)

→ Old Irish insce (mention)

→ Old Irish sechmoella (mention)