Where does “Jerk” come from?

Jerk (Westrobothnian) comes from Old Norse Eiríkr, from Proto-Norse *Aiwa-rikiaʀ.

Ancestry of “Jerk”, step by step

StepLanguageWordMeaning
1Old NorseEiríkr
2Proto-Norse*Aiwa-rikiaʀ
Every word from Proto-Norse *Aiwa-rikiaʀEvery word from Old Norse Eiríkr