Total babies named Thetis (all years): 147
| Year | Girls (count / rank / %) |
|---|---|
| 1949 | 6 / #5205 / 0.000% |
| 1946 | 7 / #4381 / 0.000% |
| 1941 | 5 / #5022 / 0.000% |
| 1939 | 5 / #4887 / 0.000% |
| 1933 | 5 / #4793 / 0.001% |
| 1929 | 6 / #4515 / 0.001% |
| 1928 | 9 / #3416 / 0.001% |
| 1927 | 10 / #3265 / 0.001% |
| 1925 | 8 / #3996 / 0.001% |
| 1924 | 7 / #4400 / 0.001% |
| Year | Girls (count / rank / %) |
|---|---|
| 1923 | 10 / #3336 / 0.001% |
| 1922 | 10 / #3352 / 0.001% |
| 1921 | 5 / #5784 / 0.000% |
| 1920 | 7 / #4350 / 0.001% |
| 1919 | 8 / #3774 / 0.001% |
| 1918 | 5 / #5515 / 0.000% |
| 1917 | 8 / #3678 / 0.001% |
| 1916 | 8 / #3518 / 0.001% |
| 1915 | 10 / #2881 / 0.001% |
| 1914 | 8 / #2848 / 0.001% |