Kourtney is a distinctive girls' name in United States, ranking #754 in 2001 with 319 recorded births. The name reached its all-time peak in 1996 with 594 births ranking #429. Since 1996, the popularity has decreased by 46.3%. In 2001, approximately 1 in every 5,644 girls born was named Kourtney. FALLING Recent data shows the name is currently falling.