Mckennah is a distinctive girls' name in United States, ranking #4767 in 2007 with 31 recorded births. The name reached its all-time peak in 1999 with 31 births ranking #3856. Since 1996, the popularity has increased by 72.2%. In 2007, approximately 1 in every 62,014 girls born was named Mckennah. FALLING Recent data shows the name is currently falling.