Where does “Ὑξώς” come from?

Ὑξώς (Ancient Greek) comes from Egyptian ḥqꜣ-ḫꜣst, from Egyptian ḥqꜣ — ruler; to rule, govern.

Ancestry of “Ὑξώς”, step by step

Step	Language	Word	Meaning
1	Egyptian	ḥqꜣ-ḫꜣst	a foreign ruler generally; one of the Hyksos
2	Egyptian	ḥqꜣ	ruler; to rule, govern