Mckennah is a distinctive girls' name in United States, ranking #5326 in 2004 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 2004, approximately 1 in every 76,505 girls born was named Mckennah. FALLING Recent data shows the name is currently falling.