Where does “nep” come from?

nep (Old Frisian) comes from Frankish hnapp, from Proto-Germanic hnappaz — bowl; cup.

Ancestry of “nep”, step by step

Step	Language	Word	Meaning
1	Frankish	hnapp	cup, bowl, basin; cup, bowl; bowl, cup
2	Proto-Germanic	hnappaz	bowl; cup

nep — Etymology, Origin & Word History | Etymology Explorer