Mckennah is a distinctive girls' name in United States, ranking #5282 in 1998 with 20 recorded births. The name reached its all-time peak in 1999 with 31 births ranking #3856. Since 1996, the popularity has increased by 11.1%. In 1998, approximately 1 in every 88,344 girls born was named Mckennah. FALLING Recent data shows the name is currently falling.