Jacobus is a distinctive boys' name in United States, ranking #9160 in 1999 with 6 recorded births. The name reached its all-time peak in 1997 with 8 births ranking #6861. Since 1996, the popularity has increased by 20.0%. In 1999, approximately 1 in every 320,015 boys born was named Jacobus. STABLE Recent data shows the name is currently stable.