Where does “aggá” come from?

aggá (Hungarian) comes from Hungarian agg, from Proto-Uralic soŋkɜ — old.

Ancestry of “aggá”, step by step

Step	Language	Word	Meaning
1	Hungarian	agg	very old, aged; old man; to shrivel, shrink,...
2	Proto-Uralic	soŋkɜ	old