Maisie is the Scottish diminutive of Margaret — from the Greek margaron, meaning "pearl." The name was popularised by James M. Barrie's books and by the early 20th-century Scottish singer Maisie Knight.
Maisie has been climbing in popularity in the United Kingdom, where it sits in the top 50. The British actress Maisie Williams (born 1997, Arya Stark in Game of Thrones) brought the name international attention. Today in the U.S. Maisie sits in the top 600 and is rising fast.
Maisie reduces to eight — the number of small-name authority.