Mckynzie is a distinctive girls' name in United States, ranking #3564 in 2012 with 45 recorded births. The name reached its all-time peak in 2012 with 45 births ranking #3564. Since 1996, the popularity has increased by 246.2%. In 2012, approximately 1 in every 39,128 girls born was named Mckynzie. FALLING Recent data shows the name is currently falling.