Stacy

As a feminine name, Stacy is commonly regarded as a diminutive of Anastasia, though it was originally used independently of that name, which was rare in America in the 1950s when Stacy began to grow in popularity. Earlier, it also appeared as an uncommon masculine name, taken from the surname Stacy or Stacey, which derives from Stace, a medieval form of Eustace.

Stacy moved from #900 to #989 for girls between 2010 and 2011. Its highest annual birth count came in 1971, with 9,117 births.