Where does “ypsilon” come from?

ypsilon (Latin) comes from Ancient Greek ὖ ψιλόν, from Phoenician 𐤅, from Egyptian 𓏲.

Ancestry of “ypsilon”, step by step

Step	Language	Word	Meaning
1	Ancient Greek	ὖ ψιλόν	upsilon, the name for the twenty-first letter Υ,...
2	Phoenician	𐤅	waw; {{l\|en\|waw}}
3	Egyptian	𓏲	—