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.
Every beginning when the Moon shall be joined to a Retrograde planet will soon be destroyed, and if she shall be otherwise impedited, the mischief will happen the sooner. - William Lilly (1602.-1681.)