Irwin vs Erwin
Irwin vs Erwin: popularity history side-by-side from official U.S. Social Security birth records.
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Irwin
| Total recorded births | 15,946 |
| Peak year | 1925 (#247) |
| Years on the list | 146 |
| 10-year trend | -25.3% |
Erwin
| Total recorded births | 21,213 |
| Peak year | 1918 (#233) |
| Years on the list | 146 |
| 10-year trend | +5.5% |
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.