Mr.

What is the plural of Mr.?

The plural of Mr. is Messrs. There is a reason for this seemingly incongruous change: were one to simply add an s to the end of Mr. it would be indistinguishable from the honorific for a married woman, and so the plural is made by shortening the plural form of the French word for Misters (Messieurs).

What is the plural of Mrs.?

The plural of Mrs. is Mmes., a shortening of the French plural Mesdames. English borrowed the French plural for this honorific after adopting Messrs. for the plural of Mr.. This was done because it would have been difficult to otherwise distinguish Mr. from Mrs. had we formed the plural by simply adding an s to it.

How do you pluralize Ms. and Miss?

Miss (an unmarried woman or girl) is pluralized as Misses. Ms. (a woman for whom the marital status is either unknown or irrelevant) may be pluralized as either Mss. or Mses.