Rajah is a distinctive boys' name in United States, ranking #7434 in 2014 with 11 recorded births. The name reached its all-time peak in 2020 with 17 births ranking #5404. Since 1996, the popularity has increased by 83.3%. In 2014, approximately 1 in every 174,585 boys born was named Rajah. FALLING Recent data shows the name is currently falling.