Compare two names
Perseus and Kaius side by side: Perseus peaked in 2025 and Kaius in 2025; in 2025 they were given to 168 and 216 babies.
Perseus and Kaius, year by year
Girls and boys together; Perseus solid, Kaius dashed.
| Perseus | Kaius | |
|---|---|---|
| Births 2025 | 168 | 216 |
| Rank 2025 | #1,210 among boys’ names | #1,029 among boys’ names |
| Recorded since 1880 | 1,422 | 2,011 |
| Peak year | 2025 | 2025 |
| Girls | 2% | 0% |
| Alive, estimated | 1,410 | 2,000 |
| Median age | 6 | 6 |
Both names: SSA national file, published May 8, 2026, and SSA’s cohort life tables.