Kourtney is a distinctive girls' name in United States, ranking #1072 in 2008 with 244 recorded births. The name reached its all-time peak in 1996 with 594 births ranking #429. Since 1996, the popularity has decreased by 58.9%. In 2008, approximately 1 in every 7,749 girls born was named Kourtney. FALLING Recent data shows the name is currently falling.