Resolute protection
A diminutive of Wilhelmina or Billie, derived from the Germanic elements 'wil' (will or desire) and 'helm' (helmet or protection). While traditionally a nickname for William, this feminine spelling offers a modern, playful twist on a classic name.
Fewer than 5 girls were named Billi in 2025.
US births per 5-year period, 1990–present (SSA data).
American actress known for 'According to Jim'
British reality television personality
