Jacub is a distinctive boys' name in United States, ranking #6742 in 1999 with 9 recorded births. The name reached its all-time peak in 2008 with 14 births ranking #6206. Since 1996, the popularity has increased by 28.6%. In 1999, approximately 1 in every 213,343 boys born was named Jacub. RISING Recent data shows the name is currently rising.