There are a couple of dictionaries out there, I think. Try googling this one.
Dictionnaire étymologique du français (EAN : 9782849023167)
I'm sure you know this, but don't forget that Le Robert has MANY dictionaries.
Dictionnaire étymologique du français (EAN : 9782849023167)
I'm sure you know this, but don't forget that Le Robert has MANY dictionaries.