Mckennah is a distinctive girls' name in United States, ranking #8019 in 2018 with 14 recorded births. The name reached its all-time peak in 1999 with 31 births ranking #3856. Since 1996, the popularity has decreased by 22.2%. In 2018, approximately 1 in every 121,459 girls born was named Mckennah. FALLING Recent data shows the name is currently falling.