Rajan is a moderately popular boys' name in England & Wales, ranking #413 in 1997 with 51 recorded births. The name reached its all-time peak in 1999 with 64 births ranking #359. Since 1996, the popularity has increased by 18.6%. In 1997, approximately 1 in every 6,166 boys born was named Rajan. FALLING Recent data shows the name is currently falling.