Declining since 2017, #10,107 for girls today.
Popularity of Willo since 1911
Babies named Willo per year in U.S. Social Security records. Raw births topped out in 1924, but relative to how few babies were recorded back then, Willo's real moment was 1932.
Data table (by decade)
| Decade | Girls |
|---|---|
| 1910s | 73 |
| 1920s | 147 |
| 1930s | 166 |
| 1940s | 63 |
| 1950s | 30 |
| 1960s | 7 |
| 1970s | 0 |
| 1980s | 0 |
| 1990s | 0 |
| 2000s | 38 |
| 2010s | 74 |
| 2020s | 39 |
Meaning & origin
Willo is a rare given name that first appeared in U.S. birth records in 1911. Its trajectory has been consistently downward since 2017, mirroring a broader decline after its peak in 1932, when it saw 23 births. In 2025, only 5 babies were named Willo, ranking it 10,107th with a frequency of 1 in 178,585 births. The name's origins are uncertain, but it is likely a modern English coinage inspired by nature names like Willow or as a diminutive of Willa. Willo saw its greatest use in the 1930s, but never entered the top 1000, and its current scarcity makes it a distinctive choice.
Willo first appeared in U.S. birth records in the early 20th century. It is likely a modern coinage influenced by nature names such as Willow, or a diminutive of Willa or Wilhelmina. Its usage peaked in the 1930s with 23 births in 1932, and has since declined, with only 5 births in 2025.
“Willo” around the world
Where Willo lands in the latest official birth statistics abroad, matched to the U.S. spelling.
France
5
babies in 2024
Sources: INSEE (France).
Nicknames & variants
Nicknames: Wil, Lo
Variants: Willow
Sibling names for Willo
Names that share Willo's style, for a brother or sister.
