Old Irish láthar

← Breton loer (cognate)

← Proto-Brythonic *lọdr (cognate)

← Proto-Celtic *ɸlātrom (inherited)

← Welsh llawdr (cognate)

← Proto-Indo-European *pleh₂- (root)

← Proto-Indo-European *pleh₂- (derived)

← Old Cornish loder (cognate)

→ Irish láthair (inherited)

→ Irish láithreach (mention)

→ Scottish Gaelic làthair (inherited)

→ Old Irish láthraid (affix)