Mckennah is a distinctive girls' name in United States, ranking #5836 in 2009 with 24 recorded births. The name reached its all-time peak in 1999 with 31 births ranking #3856. Since 1996, the popularity has increased by 33.3%. In 2009, approximately 1 in every 76,536 girls born was named Mckennah. FALLING Recent data shows the name is currently falling.