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The children that lived to adulthood were as follows: John Crowley who married Theodosia Gascoigne; Mary who married Sir James Hallett; Lettice married Sir John Hynde Cotton, 3rd Baronet; Sarah married Humphry Parsons; Anna married Richard Fleming; and Elizabeth to Lord St John of Bletsoe.
His father, William Harcourt Isham Mackworth (1806—1872), a younger son of Sir Digby Mackworth, the 3rd Baronet, took the additional surname Dolben after he married Frances, the heiress of Sir John English Dolben, the 4th Baronet.