Aj is a distinctive boys' name in England & Wales, ranking #1361 in 2007 with 16 recorded births. This places Aj in the top 24% of ranked UK boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2017 with 37 births ranking #848. In 2007, approximately 1 in every 20,709 boys born was named Aj. FALLING Recent data shows the name is currently falling.