Where does “Izis” come from?

Izis (Slovak) comes from Ancient Greek Ἶσις, from Egyptian ꜣst — Isis.

Ancestry of “Izis”, step by step

Step	Language	Word	Meaning
1	Ancient Greek	Ἶσις	Isis
2	Egyptian	ꜣst	Isis

Izis — Etymology, Origin & Word History | Etymology Explorer