Where does “Élő” come from?

Élő (Hungarian) comes from Hungarian él, from Proto-Ugric elɜ — edge.

Ancestry of “Élő”, step by step

Step	Language	Word	Meaning
1	Hungarian	él	to live; to live in a particular state; to use...
2	Proto-Ugric	elɜ	edge

Élő — Etymology, Origin & Word History | Etymology Explorer