Total babies named Sydna (all years): 168
| Year | Girls (count / rank / %) |
|---|---|
| 1979 | 5 / #11727 / 0.000% |
| 1957 | 7 / #5308 / 0.000% |
| 1956 | 6 / #5881 / 0.000% |
| 1955 | 5 / #6617 / 0.000% |
| 1954 | 7 / #5092 / 0.000% |
| 1953 | 6 / #5599 / 0.000% |
| 1952 | 6 / #5502 / 0.000% |
| 1950 | 9 / #3934 / 0.001% |
| 1947 | 8 / #4310 / 0.000% |
| 1946 | 10 / #3408 / 0.001% |
| Year | Girls (count / rank / %) |
|---|---|
| 1944 | 9 / #3354 / 0.001% |
| 1943 | 11 / #3018 / 0.001% |
| 1942 | 5 / #5292 / 0.000% |
| 1941 | 8 / #3529 / 0.001% |
| 1940 | 15 / #2195 / 0.001% |
| 1939 | 10 / #2901 / 0.001% |
| 1937 | 7 / #3760 / 0.001% |
| 1936 | 9 / #3082 / 0.001% |
| 1935 | 6 / #4153 / 0.001% |
| 1933 | 7 / #3707 / 0.001% |
| Year | Girls (count / rank / %) |
|---|---|
| 1927 | 6 / #4742 / 0.001% |
| 1915 | 6 / #4205 / 0.001% |