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Willy or Willie is a name shared by the following characters:
- William "Willie" Adama, first son of Joseph Adama (Caprica).
- Willy, the leader of a biker gang in California (1980: "Galactica Discovers Earth, Part I").
- Willie Griffin, a boy who uses the invisibility field in order to taunt a bully (Galactica Discovers Earth, Part III).
- Willie King, a Sagittaron teenage boy who is killed by Michael Robert (TRS: "The Woman King").