Missy

Missy is an English feminine name that originated as a diminutive or pet form of names beginning with the syllable M, most commonly Melissa or Millicent. It derives from the informal American English word missy, itself a diminutive of miss, used as a familiar or affectionate address for a young girl. The name gained independent use as a given name primarily in the United States during the twentieth century. Melissa and Missie are closely related forms.