Where does “Coimbra” come from?

Coimbra comes from Old Portuguese Coymbra, which derives from Latin Conimbriga, a city name of uncertain ultimate origin.

Ancestry of “Coimbra”, step by step

Step	Language	Word	Meaning
1	Portuguese	Coimbra	—
2	Old Portuguese	Coimbra	—
3	Latin	Conimbriga	—
4	Proto-Celtic	brigā	might, power
5	Proto-Indo-European	*bʰérǵʰos	—
6	Proto-Indo-European	bʰerǵʰ-	to rise; high, lofty; hill, mountain

Coimbra — Etymology, Origin & Word History | Etymology Explorer