Old Irish teglach

← Proto-Celtic *tegoslougom (inherited)

← Proto-Celtic *tegos (mention)

← Proto-Celtic *slougos (mention)

← Welsh teulu (cognate)

← Proto-Indo-European *(s)teg- (root)

← Old Irish tech (compound)

← Old Irish slóg (compound)

→ Irish teaghlach (inherited)

→ Scottish Gaelic teaghlach (inherited)