The story of Rosilyn
Rosilyn is not currently in use for newborns in the United States: fewer than five babies received the name in 2025. Its story lives in the historical record below.
Since 1930, 642 American babies have been named Rosilyn. Its peak came in 1949, when 22 newborns received the name, the signature sound of the 1940s.
The chart above shows the full history: the popularity view (births per 1,000 babies) is the honest comparison across generations, since total US births have changed enormously since 1880. Switch to the rank view to see where Rosilyn stood among all girls' names in any year, or use the compare tool to plot it against other names.