Billie

Billie is a diminutive of William, derived from the Old Germanic name Willahelm, composed of wil, meaning "will" or "desire," and helm, meaning "helmet" or "protection." Used for both males and females, Billie has a free-spirited, unisex energy that feels particularly at home in modern naming culture. Its association with celebrated artists and musicians has given it a cool, creative edge.

Billie is a name with an effortless cool to it — the kind of name that suits a pet with a personality that's entirely their own. It works beautifully for companions who are a little independent, a little fearless, and completely unforgettable. Whether it belongs to a scrappy terrier mix or a sleek, self-possessed cat, Billie carries a creative, free-spirited energy that feels both modern and timeless. Pets named Billie tend to do everything on their own terms.