Cosimo vs Jack
Cosimo vs Jack: side-by-side popularity history from official U.S. Social Security birth records.
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Cosimo
| Total recorded births | 1,016 |
| Peak year | 1927 (#1354) |
| Years on the list | 95 |
| 10-year trend | +27.1% |
Jack
| Total recorded births | 756,943 |
| Peak year | 1927 (#16) |
| Years on the list | 146 |
| 10-year trend | +0.7% |
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.