Justus is a distinctive boys' name in United States, ranking #747 in 2007 with 300 recorded births. The name reached its all-time peak in 2007 with 300 births ranking #747. Since 1996, the popularity has increased by 21.0%. In 2007, approximately 1 in every 6,917 boys born was named Justus. FALLING Recent data shows the name is currently falling.