Trajan is a distinctive boys' name in United States, ranking #2147 in 2001 with 49 recorded births. The name reached its all-time peak in 1999 with 141 births ranking #1001. Since 1996, the popularity has increased by 512.5%. In 2001, approximately 1 in every 39,650 boys born was named Trajan. FALLING Recent data shows the name is currently falling.