Billy - name meaning and origin

The boy's name Billy \b(il)-ly\, also used as girl's name Billy, is a variant of Bill (English) and William (Old German), and the meaning of Billy is "will helmet, protection".

The baby name Billy sounds like Bille, Bailey, Bayly, Baley, Baily, Bell, Byll, Billie and Bly. Other similar baby names are Birly and Willy.

Billy is a very popular male first name and a very popular surname (source: 1990 U.S. Census). Displayed below is the baby name popularity trend for the boy's name Billy. Compare Billy with related baby names.