Aj is an uncommon variant of Aja that peaked in 2012 and remains in steady use.
Aj is predominantly a boy name. In 2025 it ranked #1,932 for boy births in the United States (and #4,107 across all names), given to 80 babies. Aj first appears in 1961 and peaked in 2012 (86 births).
| Year | U.S. births | U.S. + territories | ♀ Rank | ♂ Rank |
|---|---|---|---|---|
| 2025 | 80 | 80 | — | #1,932 |
| 2024 | 60 | 60 | — | #2,346 |
| 2023 | 65 | 65 | — | #2,189 |
| 2022 | 77 | 77 | — | #1,981 |
| 2021 | 79 | 79 | — | #1,915 |
| 2020 | 90 | 90 | #8,427 | #1,896 |
| 2019 | 65 | 65 | — | #2,171 |
| 2018 | 78 | 78 | — | #1,901 |
| 2017 | 78 | 83 | — | #1,871 |
| 2016 | 87 | 87 | #12,931 | #1,863 |
| 2015 | 80 | 80 | #13,073 | #1,983 |
| 2014 | 84 | 84 | — | #1,781 |
| 2013 | 56 | 56 | — | #2,278 |
| 2012 | 92 | 92 | #15,035 | #1,743 |
| 2011 | 81 | 81 | #14,882 | #1,866 |
| 2010 | 65 | 65 | #17,102 | #2,187 |
| 2009 | 63 | 63 | — | #2,143 |
| 2008 | 79 | 79 | — | #1,839 |
| 2007 | 68 | 68 | — | #2,035 |
| 2006 | 69 | 69 | — | #1,946 |
| 2005 | 66 | 73 | — | #1,922 |
| 2004 | 60 | 70 | — | #1,989 |
| 2003 | 57 | 57 | — | #2,008 |
| 2002 | 50 | 50 | — | #2,125 |
| 2001 | 44 | 52 | — | #2,278 |
| 2000 | 44 | 44 | — | #2,223 |
| 1999 | 42 | 42 | — | #2,199 |
| 1998 | 26 | 32 | — | #3,017 |
| 1997 | 36 | — | — | #2,311 |
| 1996 | 33 | — | — | #2,380 |
| 1995 | 25 | — | — | #2,847 |
| 1994 | 36 | — | — | #2,219 |
| 1993 | 33 | — | — | #2,295 |
| 1992 | 33 | — | — | #2,254 |
| 1991 | 24 | — | — | #2,754 |
| 1990 | 21 | — | — | #2,953 |
| 1989 | 30 | — | — | #2,245 |
| 1988 | 36 | — | — | #1,850 |
| 1987 | 40 | — | — | #1,684 |
| 1986 | 42 | — | — | #1,565 |
| 1985 | 42 | — | — | #1,546 |
| 1984 | 28 | — | — | #1,933 |
| 1983 | 25 | — | — | #2,086 |
| 1982 | 12 | — | — | #3,484 |
| 1981 | 11 | — | — | #3,605 |
| 1980 | 8 | — | — | #4,506 |
| 1979 | 8 | — | — | #4,411 |
| 1978 | 6 | — | — | #5,072 |
| 1977 | 11 | — | — | #3,388 |
| 1976 | 13 | — | — | #2,947 |
| 1975 | 10 | — | — | #3,430 |
| 1973 | 5 | — | — | #5,109 |
| 1972 | 8 | — | — | #3,623 |
| 1970 | 6 | — | — | #4,238 |
| 1969 | 6 | — | — | #3,943 |
| 1968 | 11 | — | — | #2,577 |
| 1964 | 10 | — | — | #2,667 |
| 1961 | 5 | — | — | #4,068 |