köken: Etymology tree Proto-Celtic *kaballosder.? Latin caballus Old French cheval Middle French cheval French chevalbor. Esperanto ĉevalo Proto-Indo-European *-tós Proto-Italic *-tosder.? Late Latin -ittus Old French -et Middle French -et French -etbor. ▲ Late Latin -ittus Italian -ettobor. Esperanto -et- Esperanto ĉevaleto From ĉevalo (“horse”) + -et- (diminutive).