Where does “ալեւոր” come from?

ալեւոր (Old Armenian) comes from Old Armenian ալի, from Indo-European *pelH-.

ալեւոր (Old Armenian): gray-haired; old man

Definitions

Step	Language	Word	Meaning
1	Old Armenian	ալի	wave, billow, surge, swell of the sea; gray hair;...
2	Indo-European	*pelH-	—

ալեւոր — Etymology, Origin & Word History | Etymology Explorer