Jacek is a distinctive boys' name in United States, ranking #3760 in 2005 with 25 recorded births. This places Jacek in the top 28% of ranked US boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2013 with 37 births ranking #3019. Since 1996, the popularity has increased by 212.5%. In 2005, approximately 1 in every 79,886 boys born was named Jacek. STABLE Recent data shows the name is currently stable.