English word andro- comes from Proto-Indo-European *h₂ner-to-

Detailed word origin of andro-

Dictionary entry	Language	Definition
*h₂ner-to-	Proto-Indo-European (ine-pro)	virile, strong
*anḗr	Proto-Hellenic (grk-pro)
ἀνήρ	Ancient Greek (grc)
andro-	English (eng)	Human. Man, male.