Where does “Snape” come from?

Snape (English) comes from Middle English snaipen, from Old Norse sneypa, from Proto-Germanic snupaną.

Ancestry of “Snape”, step by step

Step	Language	Word	Meaning
1	Middle English	snaipen	to nip, injure, afflict, rebuke, revile,...
2	Old Norse	sneypa	to outrage, dishonor, disgrace
3	Proto-Germanic	snupaną	—

Snape — Etymology, Origin & Word History | Etymology Explorer