Trajan is a distinctive boys' name in United States, ranking #5258 in 2005 with 16 recorded births. The name reached its all-time peak in 1999 with 141 births ranking #1001. Since 1996, the popularity has increased by 100.0%. In 2005, approximately 1 in every 124,822 boys born was named Trajan. FALLING Recent data shows the name is currently falling.