Where does “drengur” come from?

drengur (Icelandic) comes from Old Norse drengr, from Proto-Germanic drangijaz — stake; staff; crutch; support; man; servant.

drengur (Icelandic): boy

Definitions

Step	Language	Word	Meaning
1	Old Norse	drengr	lad, youth, young man, in the sense of a warrior;...
2	Proto-Germanic	drangijaz	stake; staff; crutch; support; man; servant

drengur — Etymology, Origin & Word History | Etymology Explorer