Question: What is the date of birth of George Fitzroy, 1St Duke Of Northumberland's father?
Sentence (from "George FitzRoy, 1st Duke of Northumberland"): Lieutenant-General George FitzRoy, 1st Duke of Northumberland, KG, PC (28 December 1665 – 28 June 1716) was the third and youngest illegitimate son of King Charles II of England; his mother was Barbara Villiers, Countess of Castlemaine (also known as Barbara Villiers, Duchess of Cleveland).
Relevant evidence: Yes