Frank Yerby’s book A Woman Called Fancy was the 5th bestselling book of 1951. Here’s a summary:
Set in Augusta, Georgia, T traces the rise of the heroine, a beautiful South Carolina woman, from poverty to prominence among Augusta’s artistocrats. Seeking to escape marriage to an old man to whom her father is indebted, Fancy Williamson leaves South Carolina for Augusta. She begins as a dance girl on a show wagon and eventually marries into a bankrupt aristocratic family of Georgia. Her marriage to Courtland Brantley of the Hiberion Plantation, however, provokes the scorn of aristocrats and begins her downfall.
In 1952, seven baby girls were named Fancy and the name appeared on the SSA’s baby name list for the very first time.
About twenty years later, the name was given a second boost by Bobbie Gentry’s Fancy (1969). Here’s a bit of the song:
You know I mighta been born just plain white trash,
but Fancy was my name.
About twenty years after that, Reba McEntire’s 1990 cover of Fancy gave the name yet another boost.