Total babies named Petronilla (all years): 57
| Year | Girls (count / rank / %) |
|---|---|
| 1935 | 6 / #4112 / 0.001% |
| 1932 | 6 / #4309 / 0.001% |
| 1929 | 6 / #4466 / 0.001% |
| 1927 | 7 / #4192 / 0.001% |
| 1921 | 5 / #5696 / 0.000% |
| 1920 | 6 / #4851 / 0.001% |
| 1917 | 6 / #4480 / 0.001% |
| 1913 | 5 / #3597 / 0.001% |
| 1909 | 5 / #2475 / 0.001% |
| 1907 | 5 / #2322 / 0.002% |