Rosselyn is a distinctive girls' name in United States, ranking #4935 in 2005 with 27 recorded births. This places Rosselyn in the top 26% of ranked US girls' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2005 with 27 births ranking #4935. In 2005, approximately 1 in every 68,433 girls born was named Rosselyn. FALLING Recent data shows the name is currently falling.