What does Mss stand for in a name?

"Mss" is an abbreviation for "Miss," which is a title used to address or refer to a young woman or girl, typically one who is unmarried. It is often used in formal contexts or when a woman's marital status is unknown. The use of "Mss" is less common than "Ms." or "Miss," but it conveys a similar acknowledgment of a woman's name without specifying her marital status.