Where does “nokkur” come from?

nokkur (Icelandic) comes from Old Norse nǫkkurr, from Old Norse nakkvarr.

nokkur (Icelandic): some

Definitions

Step	Language	Word	Meaning
1	Old Norse	nǫkkurr	any, anybody; opposite to "engi"; some; some, a...
2	Old Norse	nakkvarr	—

nokkur — Etymology, Origin & Word History | Etymology Explorer