I read somewhere that the Merovingians claimed that they were descended from Paris of Troy. I always thought this was why they named their capital city Paris.
They may have. The Aeneid was commissioned by Augustus, and there was a claim that the Britons were descendants of the Trojans.
https://anthonyadolph.co.uk/brutus-of-troy/
Paris is so called because it was the chief city of the ancient Gallic tribe of the Parisii (the city was called Lutetia in Roman times).