Question: When was Dorothy Percy, Countess Of Northumberland's mother born?
Sentence (from "Lettice Knollys"): Lettice Knollys (sometimes latinized as Laetitia, alias Lettice Devereux or Lettice Dudley), Countess of Essex and Countess of Leicester (8 November 1543 – 25 December 1634), was an English noblewoman and mother to the courtiers Robert Devereux, 2nd Earl of Essex, and Lady Penelope Rich, although via her marriage to Elizabeth
Relevant evidence: Yes