Where does “donjon” come from?

donjon (Middle French) comes from Old French donjon, from Vulgar Latin *dominiōnem.

Ancestry of “donjon”, step by step

StepLanguageWordMeaning
1Old FrenchdonjonAlternative form of donjun; castle keep
2Vulgar Latin*dominiōnem—
Every word from Vulgar Latin *dominiōnem →Every word from Old French donjon →