Mckennah is a distinctive girls' name in United States, ranking #8033 in 2013 with 15 recorded births. The name reached its all-time peak in 1999 with 31 births ranking #3856. Since 1996, the popularity has decreased by 16.7%. In 2013, approximately 1 in every 116,961 girls born was named Mckennah. FALLING Recent data shows the name is currently falling.