Rosaleen is an Irish female first name, a variant of the Germanic Rosalind[1]. It has use in Ireland since the 16th century, possibly popularised by Rosaline in Shakespeare's Romeo and Juliet.
The name featured in "Dark Rosaleen" by James Clarence Mangan, a patriotic poem disguised as a love song, in a time when nationalistic expression was outlawed in Ireland. Thus the name is a poetic symbol of Ireland.