Mervyn Tuchet, 4th Earl of Castlehaven English noble (1650–1686) Parents Elizabeth Barnham Mervyn Tuchet, 2nd Earl of Castlehaven Children Lady Mary Tuchet Lady Elizabeth Tuchet James Tuchet, 5th Earl of Castlehaven John Touchet Siblings James Tuchet, 3rd Earl of Castlehaven Father George Touchet Lady Dorothy Tuchet George Tuchet Lady Lucy Tuchet Lady Mary Tuchet Lady Frances Tuchet Partners Lady Mary Talbot