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.
The Fixed Stars do imitate the nature and action of the Erraticals or Planets, whereof they transfer their actions unto them. - William Lilly (1602.-1681.)