Where does “kēne” come from?

kēne (Old Frisian) comes from Proto-Germanic kōniz, from Proto-Indo-European ǵneh₃- — to know.

Ancestry of “kēne”, step by step

Step	Language	Word	Meaning
1	Proto-Germanic	kōniz	able, knowledgeable, skillful, clever
2	Proto-Indo-European	ǵneh₃-	to know

kēne — Etymology, Origin & Word History | Etymology Explorer