Compare two names
Hennessey and Hennessy side by side: Hennessey peaked in 2015 and Hennessy in 2019; in 2025 they were given to 0 and 37 babies.
Hennessey and Hennessy, year by year
Girls and boys together; Hennessey solid, Hennessy dashed.
| Hennessey | Hennessy | |
|---|---|---|
| Births 2025 | 0 | 37 |
| Rank 2025 | not ranked | #3,935 among girls’ names |
| Recorded since 1880 | 383 | 1,630 |
| Peak year | 2015 | 2019 |
| Girls | 100% | 96% |
| Alive, estimated | 379 | 1,620 |
| Median age | 17 | 15 |
Both names: SSA national file, published May 8, 2026, and SSA’s cohort life tables.