Billie is a diminutive form of the name William, derived from the Germanic elements "wil" (desire) and "helm" (helmet), meaning "resolute protector." The name is primarily used in English-speaking cultures and gained particular prominence in the 20th century as a gender-neutral nickname, notably borne by jazz singer Billie Holiday and more recently by pop artist Billie Eilish.
Search baby names
Filter by gender or letter — or search by name and meaning.
Loading search…
Baby name data from babynamesuggestion.com. Popularity figures are Australian registry data and remain subject to the originating agencies' terms.