Compare two names
Duncan and Tomas side by side: Duncan peaked in 1997 and Tomas in 2003; in 2025 they were given to 190 and 394 babies.
Duncan and Tomas, year by year
Girls and boys together; Duncan solid, Tomas dashed.
| Duncan | Tomas | |
|---|---|---|
| Births 2025 | 190 | 394 |
| Rank 2025 | #1,124 among boys’ names | #691 among boys’ names |
| Recorded since 1880 | 21,230 | 30,730 |
| Peak year | 1997 | 2003 |
| Girls | 0.1% | 0.1% |
| Alive, estimated | 17,000 | 24,400 |
| Median age | 28 | 30 |
Both names: SSA national file, published May 8, 2026, and SSA’s cohort life tables.