Historical clue formulations

• Shakespearean sister — 2015-05-08
• Lear's youngest — 2014-08-09
• Shakespeare character who says "Unhappy that I am, I cannot heave / My heart into my mouth" — 2014-03-13
• Legendary queen of the Britons immortalized by Shakespeare — 2013-04-07
• The "Her" of "Her voice was ever soft, gentle and low" — 1995-04-23