Trajan is a distinctive boys' name in United States, ranking #4932 in 1997 with 13 recorded births. The name reached its all-time peak in 1999 with 141 births ranking #1001. Since 1996, the popularity has increased by 62.5%. In 1997, approximately 1 in every 145,007 boys born was named Trajan. FALLING Recent data shows the name is currently falling.