Rajah is a distinctive boys' name in United States, ranking #6379 in 2006 with 13 recorded births. The name reached its all-time peak in 2020 with 17 births ranking #5404. Since 1996, the popularity has increased by 116.7%. In 2006, approximately 1 in every 158,086 boys born was named Rajah. FALLING Recent data shows the name is currently falling.