Total babies named Petronilo (all years): 57
| Year | Boys (count / rank / %) |
|---|---|
| 1990 | 5 / #9135 / 0.000% |
| 1973 | 5 / #5681 / 0.000% |
| 1961 | 5 / #4506 / 0.000% |
| 1947 | 5 / #4138 / 0.000% |
| 1941 | 6 / #3409 / 0.000% |
| 1933 | 5 / #4039 / 0.001% |
| 1926 | 5 / #4678 / 0.000% |
| 1921 | 6 / #4219 / 0.001% |
| 1920 | 5 / #4813 / 0.000% |
| 1919 | 10 / #2821 / 0.001% |