Rising since 1990, #1,932 for boys today.
Popularity of Aj since 1961
Babies named Aj per year in U.S. Social Security records. Raw births topped out in 2012, but relative to how few babies were recorded back then, Aj's real moment was 2025.
Data table (by decade)
| Decade | Boys |
|---|---|
| 1960s | 32 |
| 1970s | 67 |
| 1980s | 274 |
| 1990s | 309 |
| 2000s | 600 |
| 2010s | 735 |
| 2020s | 439 |
Meaning & origin
AJ is a modern initial-based name that has been in use since at least 1961, when it first appeared in U.S. birth records. As of 2025, it ranks 1932nd for boys, with a frequency of 1 in 21,351 newborns. The name reached its peak popularity in 2025, reflecting a long-term upward trajectory that has been particularly pronounced since 1990. Geographically, AJ is most common in Washington, Texas, and California, suggesting a broad but slightly Western-leaning appeal. Its rise aligns with a broader trend of initials and short, punchy names becoming fashionable in the 21st century.
AJ is a modern coinage formed from the initials A and J. It emerged in the late 20th century as a given name in its own right, following the trend of using initials as first names. The name's usage has been rising steadily since the 1990s, particularly in the United States.
Where Aj is most popular
Births per 100,000 boys by state, 2025. The lightest shade means too few recorded births.
“Aj” around the world
Where Aj lands in the latest official birth statistics abroad, matched to the U.S. spelling.
Ireland
22
babies in 2025
Sources: CSO Ireland (Ireland).
Sibling names for Aj
Names that share Aj's style, for a brother or sister.
