Reilyn is a distinctive girls' name in United States, ranking #7054 in 2011 with 18 recorded births. This places Reilyn in the top 36% of ranked US girls' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2011 with 18 births ranking #7054. In 2011, approximately 1 in every 97,711 girls born was named Reilyn. FALLING Recent data shows the name is currently falling.