Question: Who was born first out of John Sheffield, 1St Duke Of Buckingham And Normanby and Robin Fox (Theatrical Agent)?
Sentence (from "Catherine Sheffield, Duchess of Buckingham and Normanby"): They had one daughter, Lady Catherine Annesley( c.1700-1736), who married, first, William Phipps, and second, John Sheldon( or Skelton).
Relevant evidence: No