Rajan is a moderately popular boys' name in England & Wales, ranking #398 in 1998 with 55 recorded births. The name reached its all-time peak in 1999 with 64 births ranking #359. Since 1996, the popularity has increased by 27.9%. In 1998, approximately 1 in every 5,645 boys born was named Rajan. FALLING Recent data shows the name is currently falling.