Trajan is a distinctive boys' name in United States, ranking #3702 in 2010 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 2010, approximately 1 in every 66,152 boys born was named Trajan. FALLING Recent data shows the name is currently falling.