Mckynzie is a distinctive girls' name in United States, ranking #7050 in 2006 with 18 recorded births. The name reached its all-time peak in 2012 with 45 births ranking #3564. Since 1996, the popularity has increased by 38.5%. In 2006, approximately 1 in every 105,615 girls born was named Mckynzie. FALLING Recent data shows the name is currently falling.