Compare two names
Isiac and Isaac side by side: Isiac peaked in 2001 and Isaac in 2007; in 2025 they were given to 0 and 5,963 babies.
Isiac and Isaac, year by year
Girls and boys together; Isiac solid, Isaac dashed.
| Isiac | Isaac | |
|---|---|---|
| Births 2025 | 0 | 5,963 |
| Rank 2025 | not ranked | #47 among boys’ names |
| Recorded since 1880 | 195 | 332,292 |
| Peak year | 2001 | 2007 |
| Girls | 0% | 0.2% |
| Alive, estimated | 150 | 299,000 |
| Median age | 23 | 18 |
Both names: SSA national file, published May 8, 2026, and SSA’s cohort life tables.