Jacek is a distinctive boys' name in United States, ranking #4901 in 2003 with 16 recorded births. The name reached its all-time peak in 2013 with 37 births ranking #3019. Since 1996, the popularity has increased by 100.0%. In 2003, approximately 1 in every 123,454 boys born was named Jacek. STABLE Recent data shows the name is currently stable.