Over the past 110 years, 16 553 girls have been named Rosalyn. The name Rosalyn ranks 996th in the United States among the most common names for girls. For the first time more than ten times newborns were named Rosalyn in 1912. The peak of popularity of the name Rosalyn came in the 1940s and 1950s. You can see absolute numbers and relative numbers on the chart. Indicators per 100K more accurately assess the popularity of the name.