Where does “Eurystheus” come from?

Eurystheus (English) comes from Latin Eurystheus, from Ancient Greek Εὐρυσθεύς, from Ancient Greek σθένος, from English micro-, from Ancient Greek μικρο-, from Ancient Greek μικρός, from Proto-Indo-European mēy- — soft, tender, dear.

Eurystheus (English): A Mycenaean king of Tiryns (or, according to some authors, of Argos), in Argolis, son of Sthenelus and grandson of Perseus, who imposed the twelve labours on Heracles

Definitions

A Mycenaean king of Tiryns (or, according to some authors, of Argos), in Argolis, son of Sthenelus and grandson of Perseus, who imposed the twelve labours on Heracles

Ancestry of “Eurystheus”, step by step

Step	Language	Word	Meaning
1	Latin	Eurystheus	—
2	Ancient Greek	Εὐρυσθεύς	Eurystheus
3	Ancient Greek	σθένος	strength, might, power
4	English	micro-	API; Very small; One millionth
5	Ancient Greek	μικρο-	micro
6	Ancient Greek	μικρός	little, small
7	Proto-Indo-European	mēy-	soft, tender, dear

Every word from Proto-Indo-European mēy- →Every word from Ancient Greek μικρός →Every word from English micro- →