Trajan is a distinctive boys' name in United States, ranking #3710 in 2009 with 29 recorded births. The name reached its all-time peak in 1999 with 141 births ranking #1001. Since 1996, the popularity has increased by 262.5%. In 2009, approximately 1 in every 68,390 boys born was named Trajan. FALLING Recent data shows the name is currently falling.