Neutral
Billie
Billie is a gender-neutral name meaning "Feminine variant of William, resolute protector". It was at its most popular in the 1930s and is rarely chosen now. As things stand now, it is a solidly familiar choice. It has appeared in U.S. birth records in nearly every decade since 1900, a genuinely long run.
EtymologyFeminine variant of William – "resolute protector"
GermanicGermanic "wil" (will) + "helm" (protection)
Births by decade
1900s
1,203
1910s
6,013
1920s
28,021
1930s
32,997
1940s
20,109
1950s
13,817
1960s
9,345
1970s
11,181
1980s
5,061
1990s
2,522
2000s
1,282
2010s
871
Peaked in the 1930s · 132,422 total U.S. births since 1900