Mckennah is a distinctive girls' name in United States, ranking #6074 in 2011 with 22 recorded births. The name reached its all-time peak in 1999 with 31 births ranking #3856. Since 1996, the popularity has increased by 22.2%. In 2011, approximately 1 in every 79,946 girls born was named Mckennah. FALLING Recent data shows the name is currently falling.