Where does “εὐροκλύδων” come from?

εὐροκλύδων (Ancient Greek) comes from Ancient Greek κλύδων, from Proto-Indo-European ḱlewH- — to clean, rinse, slide.

Ancestry of “εὐροκλύδων”, step by step

Step	Language	Word	Meaning
1	Ancient Greek	κλύδων	wave, billow, and collectively, surf, rough...
2	Proto-Indo-European	ḱlewH-	to clean, rinse, slide

εὐροκλύδων — Etymology, Origin & Word History | Etymology Explorer