Possible Clues:

• Song from 'West Side Story'; song from 'The Sound of Music'
• Shriver or Callas
• One of the great 6 - from the USA and Greece
• Von Trapp matriarch
• Santa ___ (historic ship)
• Doctor Montessori
• Shriver of NBC News
• "Sesame Street" woman for 44 years
• 'Sesame Street' woman for 44 years
• Girl's name; darker moon areas