| Isaiah | Isaac | |
|---|---|---|
| Meaning | Yahweh is salvation | He will laugh |
| Origin | Hebrew | Hebrew |
| Gender | Boy | Boy |
| Pronunciation | eye-ZAY-uh | EYE-zik |
| Syllables | 3 | 2 |
| First appeared | 1880 | 1880 |
| Peak year | 2006 (10,459) | 2007 (10,274) |
| In 2025 | 5,267 | 5,953 |
| Trend | Declining | Declining |
Source: US Social Security Administration.
| Decade | Isaiah | Isaac |
|---|---|---|
| 2020s | 32,963 | 39,997 |
| 2010s | 76,320 | 94,574 |
| 2000s | 92,786 | 90,761 |
| 1990s | 36,586 | 40,271 |
| 1980s | 6,709 | 18,374 |
| 1970s | 1,578 | 10,480 |
| 1960s | 727 | 4,605 |
| 1950s | 1,180 | 5,479 |
| 1940s | 1,194 | 5,064 |
| 1930s | 1,039 | 4,715 |
| 1920s | 1,262 | 6,552 |
| 1910s | 845 | 4,952 |
| 1900s | 263 | 1,638 |
| 1890s | 264 | 1,735 |
| 1880s | 304 | 2,311 |
Isaiah comes from the Hebrew Yeshayahu, “Yahweh is salvation.” He was one of the greatest Old Testament prophets, widely quoted in the New Testament.
Isaac is from the Hebrew Yiṣḥaq, “he will laugh,” a reference to Sarah’s joy at his birth in Genesis.
Isaac is more popular than Isaiah today: about 5,953 US babies were given the name Isaac in 2025, compared with 5,267 named Isaiah.
Isaiah means Yahweh is salvation (Hebrew origin), while Isaac means He will laugh (Hebrew origin).
In US records, Isaiah first appears in 1880 and Isaac in 1880, so Isaiah has the longer recorded history.