Rosealyn is a distinctive girls' name in United States, ranking #14210 in 2015 with 7 recorded births. This places Rosealyn in the bottom 26% of ranked US girls' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2018 with 15 births ranking #7691. In 2015, approximately 1 in every 254,951 girls born was named Rosealyn. FALLING Recent data shows the name is currently falling.