Where does “wīsa” come from?

wīsa (Old Dutch) comes from Proto-Germanic wīsǭ, from Proto-Indo-European weyd- — to see.

Ancestry of “wīsa”, step by step

Step	Language	Word	Meaning
1	Proto-Germanic	wīsǭ	manner, way
2	Proto-Indo-European	weyd-	to see

wīsa — Etymology, Origin & Word History | Etymology Explorer