And getting back to Mademoiselle,+ it's interesting that +Mrs+ and +Mr have no English plural. The plurals are "Messrs" (from Messieurs) and "Mesdames" or "Mmes". Nowadays, these plurals are pretty much only used in formal writing or as a joke, at least int he US.
The plural of Miss is English--MIsses.
I've seen Mss and Mses proposed as plurals for Ms.
