Jacek is a distinctive boys' name in England & Wales, ranking #2859 in 1997 with 3 recorded births. This places Jacek in the bottom 24% 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 1997, approximately 1 in every 104,815 boys born was named Jacek. FALLING Recent data shows the name is currently falling.