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 | Calvin | Charles |
|---|---|---|
| Official rank | #132 | #48 |
| Combined rank | #134 | #50 |
| Rank difference | -2.0 | -2.0 |
| Multiplier | 1.0× | 1.0× |
| Rate per 10k | 15.9 | 34.5 |
| 1-in-N | 630.3 | 289.6 |
| Trend label | past peak | past peak |
| Expected per 100 | 0.1 | 0.2 |
| Expected per 300 | 0.2 | 0.5 |
| Latest as % of peak | 36.5% | 7.1% |
| Peak year | 1924 | 1880 |