Total babies named Thersea (all years): 125
| Year | Girls (count / rank / %) |
|---|---|
| 1980 | 7 / #9021 / 0.000% |
| 1974 | 6 / #8667 / 0.000% |
| 1973 | 6 / #8345 / 0.000% |
| 1972 | 6 / #8189 / 0.000% |
| 1970 | 7 / #7003 / 0.000% |
| 1969 | 8 / #5933 / 0.000% |
| 1968 | 11 / #4467 / 0.001% |
| 1965 | 8 / #5251 / 0.000% |
| 1963 | 8 / #5259 / 0.000% |
| 1962 | 10 / #4508 / 0.001% |
| Year | Girls (count / rank / %) |
|---|---|
| 1961 | 11 / #4212 / 0.001% |
| 1960 | 9 / #4744 / 0.000% |
| 1959 | 7 / #5523 / 0.000% |
| 1957 | 6 / #6025 / 0.000% |
| 1955 | 8 / #4705 / 0.000% |
| 1952 | 7 / #4877 / 0.000% |