how do you pronounce Marigny?
Mare-i-nee. It is a neighborhood, next to the French Quarter. The complete name is Faubourg (foe-boorg)Marigny, meaning neighborhood, more or less. There are other Faubourgs, such as Faubourg St. John.
There are also several restaurants in that area that bear the name Marigny -- Marigny Brasserie, and I think there is still some version of Cafe Marigny in existence.