Mckennah is a distinctive girls' name in United States, ranking #7310 in 2017 with 16 recorded births. The name reached its all-time peak in 1999 with 31 births ranking #3856. Since 1996, the popularity has decreased by 11.1%. In 2017, approximately 1 in every 107,867 girls born was named Mckennah. FALLING Recent data shows the name is currently falling.