Semaj is a distinctive boys' name in United States, ranking #939 in 1999 with 156 recorded births. The name reached its all-time peak in 2011 with 374 births ranking #627. Since 1996, the popularity has increased by 51.5%. In 1999, approximately 1 in every 12,308 boys born was named Semaj. FALLING Recent data shows the name is currently falling.