Mckennah is a distinctive girls' name in United States, ranking #4527 in 2001 with 27 recorded births. The name reached its all-time peak in 1999 with 31 births ranking #3856. Since 1996, the popularity has increased by 50.0%. In 2001, approximately 1 in every 66,687 girls born was named Mckennah. FALLING Recent data shows the name is currently falling.