Name comparison
Compare names
Compare national popularity curves, combined-spelling ranks, trend signals, and practical duplicate estimates.
National popularity over time
Combined-spelling rank, U.S. national history. Lower ranks are more popular.
Quick verdict
Fast takeaways from the current comparison. Click a card to open that name report.
Detailed metrics
Sortable side-by-side values. Highlighted cells mark the strongest value for that row.
| Metric | Leo | Theodore |
|---|---|---|
| Official rank | #19 | #4 |
| Combined rank | #20 | #5 |
| Rank difference | -1.0 | -1.0 |
| Multiplier | 1.0× | 1.0× |
| Rate per 10k | 47.8 | 78.2 |
| 1-in-N | 209.0 | 127.9 |
| Trend label | mixed / watch | recently peaked |
| Expected per 100 | 0.2 | 0.4 |
| Expected per 300 | 0.7 | 1.2 |
| Latest as % of peak | 89.7% | 100.0% |
| Peak year | 1903 | 2025 |