Kourtney is a distinctive boys' name in United States, ranking #4591 in 2011 with 21 recorded births. The name reached its all-time peak in 2011 with 21 births ranking #4591. Since 1996, the popularity has increased by 40.0%. In 2011, approximately 1 in every 90,428 boys born was named Kourtney. STABLE Recent data shows the name is currently stable.