The baby name Isao appears in baby name data for the United States from 1915 to 1930. It was most popular in 1917 with 28 babies given the name.
Over the period shown, Isao has stayed at a similar level of popularity.
| Year | Count |
|---|---|
| 1915 | 10 |
| 1916 | 12 |
| 1917 | 28 |
| 1919 | 16 |
| 1921 | 10 |
| 1922 | 14 |
| 1923 | 16 |
| 1924 | 16 |
| 1925 | 14 |
| 1926 | 18 |
| 1929 | 10 |
| 1930 | 10 |