Where does “sturjoun” come from?

sturjoun (Middle English) comes from Old French estorjoun, from Frankish sturjō, from Proto-Germanic sturjô — sturgeon.

Ancestry of “sturjoun”, step by step

StepLanguageWordMeaning
1Old Frenchestorjounsturgeon
2Frankishsturjōsturgeon
3Proto-Germanicsturjôsturgeon
Every word from Proto-Germanic sturjô →Every word from Frankish sturjō →Every word from Old French estorjoun →