Hungarian word mennyi comes from Hungarian mi, Hungarian -nyi-

Detailed word origin of mennyi

Dictionary entry	Language	Definition
mi	Hungarian (hun)	(personal) we (interrogative) what? (poetic) how ...!, what a ...! Mi, a syllable used in solfège to represent the third note of a major scale.
-nyi-	Hungarian (hun)
mennyi	Hungarian (hun)	(interrogative) how much?.

Words with the same origin as mennyi