Cynthia is a feminine given name. It is often thought to be of Greek origin, but words and names with "inth" are actually Pre-Greek names belonging to another language family, before the Indo-European migrations. The name has been in use in the Anglosphere since the 17th century. There are various spellings for this name, and it can be abbreviated to Cindy, Cyndi, Cyndy, Cinny, or occasionally to Thea, Tia, or Thia.