Where does “Olympia” come from?

Olympia comes from Ancient Greek Ὀλυμπία, formed from Ancient Greek Ὄλυμπος with the suffix -ῐ́ᾱ.

Ancestry of “Olympia”, step by step

Step	Language	Word	Meaning
1	Ancient Greek	Ὀλυμπία	—
2	Ancient Greek	-ῐ́ᾱ	{{l\|en\|-ia}}; "suffix forming abstract feminine...
3	Proto-Indo-European	-íh₂	—
4	Proto-Indo-European	-h₂	Creates collective nouns, which refer to groups...

Olympia — Etymology, Origin & Word History | Etymology Explorer