Rontarius vs Ontarius
Rontarius vs Ontarius: popularity history side-by-side from official U.S. Social Security birth records.
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Rontarius
| Total recorded births | 5 |
| Peak year | 1994 (#9961) |
| Years on the list | 1 |
| 10-year trend | — |
Ontarius
| Total recorded births | 13 |
| Peak year | 1991 (#7064) |
| Years on the list | 2 |
| 10-year trend | -14.3% |
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.