Sinclair vs Synclair
Sinclair vs Synclair: popularity history side-by-side from official U.S. Social Security birth records.
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Sinclair
| Total recorded births | 477 |
| Peak year | 2025 (#4740) |
| Years on the list | 35 |
| 10-year trend | +74.6% |
Synclair
| Total recorded births | 17 |
| Peak year | 1994 (#11636) |
| Years on the list | 3 |
| 10-year trend | — |
Figures are from the U.S. Social Security Administration Popular Baby Names dataset (public domain). Names with fewer than 5 recorded births in a year or state are suppressed by the source.