Where does “donc” come from?

donc (Middle French) comes from Middle French doncques, from Old French donkes, from Vulgar Latin *dunquam.

Ancestry of “donc”, step by step

StepLanguageWordMeaning
1Middle Frenchdoncquestherefore
2Old Frenchdonkestherefore; ergo; so
3Vulgar Latin*dunquam—
Every word from Vulgar Latin *dunquam →Every word from Old French donkes →Every word from Middle French doncques →