Ophelia is often traced to Greek roots meaning "help" or "benefit," though the name is more widely known through a literary figure than through everyday historical use. It's commonly associated with a kind of tender vulnerability paired with genuine usefulness -- someone whose presence is meant to ease rather than burden others.
The Moon hath great power in all questions, except when Leo, Capricorn, or Sagittarius ascend: for either of those signs abate of her significations; chiefly Leo or Aquarius. - William Lilly (1602.-1681.)