Rose; beautiful rose
A modern elaboration of the name Rose, likely influenced by the suffix -lyn or the name Rosalyn. It combines the botanical imagery of the rose flower with a melodic, multi-syllabic ending popular in American naming traditions.
Less common today
Rosealyn isn't in the latest US Top 1000. It last peaked at #7,730 in 2018.
US births per 5-year period, 1990βpresent (SSA data).