Declining since 2006, #4,539 for boys today.
Popularity of Isac since 1884
Babies named Isac per year in U.S. Social Security records.
Data table (by decade)
| Decade | Boys |
|---|---|
| 1880s | 5 |
| 1890s | 11 |
| 1900s | 33 |
| 1910s | 132 |
| 1920s | 145 |
| 1930s | 81 |
| 1940s | 22 |
| 1950s | 12 |
| 1960s | 21 |
| 1970s | 61 |
| 1980s | 192 |
| 1990s | 543 |
| 2000s | 1,210 |
| 2010s | 577 |
| 2020s | 158 |
Meaning & origin
Isac is a spelling variant of Isaac that has seen occasional use in the United States since the late 19th century. First recorded in 1884, it reached its peak popularity in 2006 but has since declined, reflecting a trajectory of falling use. In 2025, it ranked 4,539 with a rarity of about 1 in 77,640 newborns. The variant is most common in California, where many culturally diverse names gain traction. While Isaac remains the standard form, Isac offers a streamlined alternative that maintains the biblical heritage.
Isac is a spelling variant of Isaac, from the Hebrew name Yitzchak, derived from the root tzachak meaning 'to laugh.' In the Old Testament, Isaac is the son of Abraham and Sarah, born in their old age. The variant Isac has been used sporadically in English-speaking countries, particularly in the United States.
Where Isac is most popular
Births per 100,000 boys by state, 2025. The lightest shade means too few recorded births.
“Isac” around the world
Where Isac lands in the latest official birth statistics abroad, matched to the U.S. spelling.
France
45
babies in 2024
Sources: INSEE (France).
Nicknames & variants
Nicknames: Ike, Zac
Sibling names for Isac
Names that share Isac's style, for a brother or sister.
