Trajan is a distinctive boys' name in United States, ranking #4589 in 2004 with 19 recorded births. The name reached its all-time peak in 1999 with 141 births ranking #1001. Since 1996, the popularity has increased by 137.5%. In 2004, approximately 1 in every 104,463 boys born was named Trajan. FALLING Recent data shows the name is currently falling.