Sidney or Sydni
More babies were named Sidney than Sydni in every recorded year.
nameyearbook.com/compare/sidney-vs-sydni
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Popularity over time
Babies given each name per 1,000 babies of the sex it's most often recorded as, 1880–2025.
Sidney or Sydni
| Sidney | Sydni | |
|---|---|---|
| Rank in 2025 | #1,323 (boys) | #10,917 (girls) |
| Trend | Steady | Falling |
| Peak year | 1912 | 2000 |
| Top state | Pennsylvania | — |