One of the most puzzling names I have run across is Chasity, a given name for girls. According to The Baby Name Wizard, it is unknown before the '60s, peaked in popularity in the early '80s at 344th, and has fallen off quite a bit lately.
Still, it was quite popular, ranking 872 out of 4275 for females of all ages in the 1990 U.S. Census. Since girls' names are much more diverse than boys' names, being in the top 1000 is pretty good.
My problem is – how to put this delicately – that the name seems to be based on a typographical error, compounded by ignorance. A Google search for the word yields hundreds of entries in which the writer clearly meant to write "chastity."
One baby name site politely described the name as a "simplified form of Chastity."
My wife has told me that fads in girls' names are often driven by soap opera characters. I have not been able to find a soap character, or other pop culture source, which might have made this name take off in the early '80s. The most famous real person that I can find with this name is Chasity Melvin, a player in the Women's National Basketball Association.
There was a notorious case in Kentucky involving a high-schooler who was not admitted to the National Honor Society because she had just had a kid without benefit of husband. Just to make the case perfect, her name was Chasity.
Does anyone have any insight into this name?