Where does “hasznáról” come from?

hasznáról (Hungarian) comes from Hungarian -ról, from Proto-Uralic roγ- — nearness.

Ancestry of “hasznáról”, step by step

Step	Language	Word	Meaning
1	Hungarian	-ról	Used to form the delative case, indicating...
2	Proto-Uralic	roγ-	nearness