Total babies named Gwendlyon (all years): 78
| Year | Girls (count / rank / %) |
|---|---|
| 1962 | 6 / #6124 / 0.000% |
| 1961 | 7 / #5496 / 0.000% |
| 1960 | 5 / #6705 / 0.000% |
| 1959 | 6 / #5815 / 0.000% |
| 1957 | 7 / #5078 / 0.000% |
| 1952 | 5 / #5878 / 0.000% |
| 1951 | 6 / #5066 / 0.000% |
| 1948 | 5 / #5544 / 0.000% |
| 1947 | 6 / #4956 / 0.000% |
| 1945 | 6 / #4221 / 0.000% |
| Year | Girls (count / rank / %) |
|---|---|
| 1944 | 5 / #4827 / 0.000% |
| 1942 | 5 / #4905 / 0.000% |
| 1941 | 9 / #3104 / 0.001% |