Billi is a diminutive form of the name Bill, which is derived from the Old English word bill, meaning sword or weapon. Billi is a popular name for girls in Germany, where it is pronounced BEE-lee. In Hinduism, Billi is a goddess associated with the earth and fertility. Billi is also a popular name for cats, particularly in the United Kingdom. In the world of sports, Billi is a term used in billiards to refer to the cue ball. Billi is a common name for a female rabbit in German-speaking countries. In some African cultures, Billi is a term of endearment for a loved one. Billi is a character in the popular video game League of Legends. Billi is a type of pasta in Italian cuisine, similar to spaghetti but thicker and more cylindrical in shape. Billi is a genus of fish in the family Blenniidae, commonly known as the combtooth blennies. In the world of fashion, Billi is a brand of luxury handbags and accessories known for their bold, edgy designs. Billi is a popular name for a pet bird, particularly a parakeet or cockatiel. In some parts of the United States, Billi is a term used to refer to a large, juicy cheeseburger. Billi is a term used in some African cultures to refer to a traditional healer or diviner. Billi is a popular name for a dog, particularly a small breed like a Pomeranian or Poodle. In the world of music, Billi is a term used to describe a particular rhythmic pattern in Afro-Cuban music. Billi is a character in the popular children's book series The Adventures of Billi and Friends.

The root form of Billi is Billi — meaning Short form of "William" or "Wilhelmina.".

Billi remains a beloved choice, ranking #7 in the US. Timeless appeal across cultures and generations.