Compare two names
Cidney and Sydney side by side: Cidney peaked in 1999 and Sydney in 2000; in 2025 they were given to 0 and 893 babies.
Cidney and Sydney, year by year
Girls and boys together; Cidney solid, Sydney dashed.
| Cidney | Sydney | |
|---|---|---|
| Births 2025 | 0 | 893 |
| Rank 2025 | not ranked | #348 among girls’ names |
| Recorded since 1880 | 892 | 187,700 |
| Peak year | 1999 | 2000 |
| Girls | 98% | 95% |
| Alive, estimated | 874 | 178,000 |
| Median age | 26 | 24 |
Both names: SSA national file, published May 8, 2026, and SSA’s cohort life tables.