Billie.

About Billie

Billie is a unisex given name. It is a variant spelling of Billy, an English nickname for William and its masculine and feminine variants. It has also been used as a feminine nickname for etymologically unrelated names such as Lillian. Both Billie and Billy are often also used as independent given names. The spelling Billie has recently become primarily feminine in use, while the spelling Billy is more commonly used for males.