Rosaleen is of Irish origin, derived from the name Róisín, which means 'little rose'. It gained popularity during the Gaelic Revival in Ireland in the late 19th and early 20th centuries. Rosaleen was particularly common among Irish immigrants to the United States during this period.
The name Rosaleen experienced significant fluctuations in popularity over the years. It peaked in the late 1920s and early 1930s with a high of 26 births in 1927, but it began to decline sharply thereafter, reaching a low of just 5 births in 1985 and again in 1993. There was a slight resurgence in popularity from the late 1990s to around 2006, with numbers ranging between 6 to 14 births per year. However, since then, the name has seen increased favor once more, with over 20 births recorded every year from 2013 onwards, reaching a recent high of 51 births in 2019. Overall, there were a total of 1174 babies named Rosaleen born between 1915 and 2023.