There are two female vocalists named Martha Davis. 1. Davis was born in Wichita, Kansas, and raised in Chicago, Illinois. By the mid 1930s, she had met and been influenced by Fats Waller, and performed regularly as a singer and pianist in Chicago clubs. In 1939, she met, and later married, bass player Calvin Ponder (October 17, 1917 - December 26, 1970), who went on to play in Earl Hines' band.