Latin esox

← Gaulish *esoks (borrowed)

← Proto-Celtic *esoxs (derived)

← Welsh eog (cognate)

← Irish eo (cognate)

← Ancient Greek ἴσοξ (cognate)

→ Esperanto ezoko (derived)

→ Basque izokin (affix)

→ Ancient Greek ἴσοξ (cognate)

→ Ido ezoko (derived)