Billi, also known as Billie, is a popular name that can refer to various subjects, including people, characters, or brands. In some contexts, it may refer to a character in literature or film, while in others, it could denote a specific product or service. The name is often associated with a friendly and approachable persona. In popular culture, Billie can also refer to Billie Eilish, a well-known singer and songwriter recognized for her unique style and impactful music. Her work has garnered numerous awards and a large fan base, making her a significant figure in contemporary music.