Middle English word hye comes from Proto-Indo-European *ḱoy-, and later Proto-Germanic *hijō (She;.)

Detailed word origin of hye

Dictionary entry	Language	Definition
*ḱoy-	Proto-Indo-European (ine-pro)
*hijō	Proto-Germanic (gem-pro)	She;.
hīo	Old English (ang)
ȝho	Middle English (enm)
sche	Middle English (enm)	Feminine nominative pronoun.

Words with the same origin as hye