Mckynzie is a distinctive girls' name in United States, ranking #6987 in 2008 with 19 recorded births. The name reached its all-time peak in 2012 with 45 births ranking #3564. Since 1996, the popularity has increased by 46.2%. In 2008, approximately 1 in every 99,511 girls born was named Mckynzie. FALLING Recent data shows the name is currently falling.