Trajan is a distinctive boys' name in United States, ranking #7104 in 2016 with 12 recorded births. The name reached its all-time peak in 1999 with 141 births ranking #1001. Since 1996, the popularity has increased by 50.0%. In 2016, approximately 1 in every 158,101 boys born was named Trajan. FALLING Recent data shows the name is currently falling.