Compare two names
Kiefer and Kieffer side by side: Kiefer peaked in 1991 and Kieffer in 1994; in 2025 they were given to 6 and 0 babies.
Kiefer and Kieffer, year by year
Girls and boys together; Kiefer solid, Kieffer dashed.
| Kiefer | Kieffer | |
|---|---|---|
| Births 2025 | 6 | 0 |
| Rank 2025 | #11,395 among boys’ names | not ranked |
| Recorded since 1880 | 1,950 | 166 |
| Peak year | 1991 | 1994 |
| Girls | 0% | 0% |
| Alive, estimated | 1,900 | 161 |
| Median age | 29 | 30 |
Both names: SSA national file, published May 8, 2026, and SSA’s cohort life tables.