"Mme" is "Madame", indicating a married woman. "Mmelle" stands for "Mademoiselle", which means an unmarried woman, and in that case it would have her own name (

"Mme" is "Madame", indicating a married woman. "Mmelle" stands for "Mademoiselle", which means an unmarried woman, and in that case it would have her own name (as there is no husband).