West Frisian ko

← Proto-Germanic *kūz (inherited)

← Proto-West Germanic *kū (inherited)

← Proto-Indo-European *gʷṓws (inherited)

← Old Frisian kū (inherited)

→ English cow (cognate)

→ North Frisian kü (cognate)

→ North Frisian Kü (cognate)

→ West Frisian seeko (compound)

→ West Frisian kowefleis (compound)

→ Luxembourgish Kou (cognate)

→ Dutch koe (cognate)

→ Saterland Frisian Ku (cognate)