Breton naer

← Breton nezañ (cognate)

← Breton neudenn (mention)

← Breton nodoez (mention)

← Proto-Celtic *natrixs (inherited)

← Welsh neidr (cognate)

← Irish nathair (cognate)

← Proto-Indo-European *nh₁trih₂ (inherited)

← Proto-Indo-European *snéh₁ (mention)

← Old Breton natr (inherited)

→ Welsh neidr (cognate)

→ Irish nathair (cognate)

→ Scottish Gaelic nathair (cognate)