Mj is a very rare name used for both girls and boys that peaked in 2022 and remains in steady use.
Mj is predominantly a boy name. In 2025 it ranked #5,765 for boy births in the United States (and #12,155 across all names), given to 16 babies. Mj first appears in 2005 and peaked in 2018 (17 births).
| Year | U.S. births | U.S. + territories | ♀ Rank | ♂ Rank |
|---|---|---|---|---|
| 2025 | 16 | 16 | — | #5,765 |
| 2024 | 15 | 15 | #14,717 | #8,760 |
| 2023 | 16 | 16 | #16,835 | #7,584 |
| 2022 | 26 | 26 | #9,462 | #6,052 |
| 2021 | 17 | 17 | #10,857 | #9,403 |
| 2020 | 14 | 14 | #14,566 | #9,275 |
| 2019 | 10 | 10 | — | #8,019 |
| 2018 | 22 | 22 | #17,382 | #5,468 |
| 2017 | 9 | 15 | — | #8,613 |
| 2015 | 9 | 9 | — | #8,497 |
| 2014 | 11 | 11 | — | #7,379 |
| 2013 | 7 | 7 | — | #10,367 |
| 2012 | 10 | 15 | — | #7,944 |
| 2011 | 6 | 6 | — | #11,800 |
| 2010 | 5 | 5 | — | #13,620 |
| 2009 | 13 | 13 | — | #6,691 |
| 2008 | 6 | 6 | — | #12,074 |
| 2006 | 7 | 7 | — | #10,296 |
| 2005 | 5 | 5 | — | #12,720 |