John St. John English politician, died 1558 (1495–1562) Parents Sibyl verch Morgan Sir John St. John Children Margaret St. John Oliver St John, 1st Baron St John of Bletso Cressett St.John Margaret Russell Siblings Catherine St. John Alice St. John James Skydmore (Scudamore), of Kentchurch Margaret St. John Alexander St John Partners Margaret Waldegrave