Rajah is a distinctive boys' name in United States, ranking #7458 in 2021 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 2021, approximately 1 in every 158,931 boys born was named Rajah. FALLING Recent data shows the name is currently falling.