I think it's Le Havre, not L'Havre (has to do with what they call liaison, pronounced like the name Lee A. Zohn). I think lots of French place names have prefixed articles, but I'm thinking of places (like The Hague, the Bronx, or The Newtown) where "the" is part of the English name (and I don't recall seeing "The Havre" in English; there's a Havre, Montana, but it's never had an article that I've seen [nor much else, it's one of those depressing towns just off to the side of depressing, depressed Indian reservations].

Liland