Izaak is a distinctive boys' name in England & Wales, ranking #2133 in 2025 with 11 recorded births. The name reached its all-time peak in 2007 with 52 births ranking #580. Since 1996, the popularity has decreased by 62.1%. In 2025, approximately 1 in every 24,721 boys born was named Izaak. STABLE Recent data shows the name is currently stable.