Isaack is a very rare variant of Isaac that peaked in 2004 and has since faded.
Isaack is a boy name. In 2025 it ranked #12,748 for boy births in the United States (and #26,241 across all names), given to 5 babies. Isaack first appears in 1996 and peaked in 2004 (13 births).
| Year | U.S. births | U.S. + territories | Rank |
|---|---|---|---|
| 2025 | 5 | 5 | #12,748 |
| 2020 | 5 | 5 | #12,816 |
| 2019 | 6 | 6 | #11,302 |
| 2018 | 5 | 5 | #12,924 |
| 2017 | 6 | 6 | #11,300 |
| 2016 | 7 | 7 | #10,074 |
| 2014 | 6 | 6 | #11,250 |
| 2013 | 8 | 8 | #9,111 |
| 2012 | 7 | 7 | #10,122 |
| 2011 | 12 | 12 | #6,755 |
| 2009 | 11 | 11 | #7,399 |
| 2008 | 13 | 13 | #6,547 |
| 2007 | 11 | 11 | #7,287 |
| 2004 | 13 | 13 | #5,931 |
| 2003 | 9 | 9 | #7,481 |
| 2002 | 7 | 7 | #8,813 |
| 2001 | 5 | 5 | #11,237 |
| 1996 | 5 | — | #9,579 |