Where does “Nicomedia” come from?

Nicomedia comes from Latin Nicomedia, from Ancient Greek Νικομήδεια, a city name of unknown ultimate origin.

Ancestry of “Nicomedia”, step by step

Step	Language	Word	Meaning
1	Latin	Nīcomēdīa	—
2	Ancient Greek	Νικομήδεια	—
3	Ancient Greek	Νικομήδης	Nicomedes
4	Ancient Greek	μήδεα	counsel, plan, art, prudence, cunning; male...
5	Ancient Greek	μέδω	to protect, rule over
6	Proto-Indo-European	mēd-	—
7	Proto-Indo-European	med-	to measure; to give advice; healing