Jacek is a distinctive boys' name in England & Wales, ranking #1902 in 2015 with 12 recorded births. This places Jacek in the top 31% of ranked UK boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2008 with 13 births ranking #1596. In 2015, approximately 1 in every 27,769 boys born was named Jacek. FALLING Recent data shows the name is currently falling.