The baby name Willo appears in baby name data for the United States from 1927 to 1938. It was most popular in 1931 with 7 babies given the name.
Over the period shown, Willo has stayed at a similar level of popularity.
| Year | Count |
|---|---|
| 1927 | 6 |
| 1928 | 5 |
| 1931 | 7 |
| 1932 | 5 |
| 1935 | 5 |
| 1938 | 5 |