Rosalie is a French diminutive built on rosa, the rose, and the name is traditionally associated with blossoming beauty -- something that unfolds gradually rather than arriving fully formed. It's often read as carrying a soft, romantic warmth, favoring gentle unfolding over sudden or dramatic bloom.
Refuse the Moon in Cancer or Scorpio for marriages, unless it be in marrying of widows. - William Lilly (1602.-1681.)