Mckennah is a distinctive girls' name in United States, ranking #8705 in 2016 with 13 recorded births. The name reached its all-time peak in 1999 with 31 births ranking #3856. Since 1996, the popularity has decreased by 27.8%. In 2016, approximately 1 in every 136,268 girls born was named Mckennah. FALLING Recent data shows the name is currently falling.