Mckaylin is a distinctive girls' name in United States, ranking #12963 in 2011 with 8 recorded births. This places Mckaylin in the bottom 34% of ranked US girls' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2004 with 8 births ranking #12359. In 2011, approximately 1 in every 219,851 girls born was named Mckaylin. FALLING Recent data shows the name is currently falling.