If we can ever be bothered to think about them, street names are usually a mystery

writes
Stephen Clarke,
except maybe in American cities where it’s pretty obvious why they’ve
called a road “First Avenue”. In Paris, curious passers-by and residents
are often helped by little explanations on the blue enamel plaque,
telling you who exactly gave their name to the thoroughfare.
… I used to live in an excellent street in Paris – not only was it
well-placed, in the Marais, it was also short and easy to spell. I pity
the poor people who live in streets like the rue des Cinq Martyrs de la
Révolution du 25 Mai 1848 (which doesn’t exist,
but could in this country that loves to commemorate important dates in
its street names). My address was in the rue Dupuis, so filling in forms
was a pleasure. Recently though, I walked along it and noticed that
they’ve changed the name to explain who Monsieur Dupuis was – it’s now
called rue Charles-François Dupuis. He was an 18th-century scientist and
politician, apparently. Perhaps the city didn’t want us to confuse him
with some other Dupuis who did less noteworthy things – Jean-Paul Dupuis
the serial-killing shoe repairer, maybe, who also doesn’t exist but
could do in some 19th century novel.
I hope the powers-that-be won’t apply this full-name principle to all
Paris’s streets, otherwise lots of residents could be in for a painful
form-filling time. There’s a boulevard Beaumarchais, for example, named
after the author of The Marriage of Figaro, and his full name
is Pierre-Augustin Caron de Beaumarchais. Even worse, the neat rue de
Sully in the 4th is named after Maximilien de Béthune, Duc de Sully
whose other titles were Prince souverain d’Henrichemont et de Boisbelle
Baron, Marquis de Rosny, Marquis de Nogent-le-Rotrou, Comte de Muret et
de Villebon, Vicomte de Meau. Try to get that on a postcard.
Stephen Clarke’s book
Paris Revealed
is an insider’s guide to his home city, and includes a section on
street-naming policies, and the history of Paris’s trademark blue enamel
plaques.