Billi is of German origin and means 'protector'. It's also considered unisex, but it's more commonly used for females. It was popular in the Middle Ages but fell out of favor thereafter until recent years when it started to regain some traction. The name Billi has a straightforward, sturdy quality, yet it's short enough to be considered quite charming as well. It can also serve as a nickname for other names like Wilhelmina or Isabella.
"Billi was born five times in 2006."