Lady Mary Sheffield Peerage person ID=29725 (d. 1619) Parents Ursula Tyrwhitt Edmund Sheffield, 1st Earl of Mulgrave Children Frances Fairfax Charles Fairfax Mary Fairfax Thomas Fairfax, 3rd Lord Fairfax of Cameron Ellen Fairfax Dorothy Fairfax Elizabeth Fairfax Siblings unknown Sheffield unknown Sheffield John Sheffield Frances Sheffield Lady Margred Sheffield James Sheffield, Baron Sheffield Elizabeth Sheffield Partners Ferdinando Fairfax, 2nd Baron Fairfax of Cameron