He may have been sired by Curwen's Bay Barb

Sire of Crab (1729 King's Plate Newmarket, exceptionally successful stallion, Champion Sire in 1748, 1749, 1750); [Alcock's] Spot (1728 King's Plates Nottingham, York and numerous other races); Gentleman (1729 King's Plate Nottingham); [White's] Spot (1729 King's Plates Edinburgh, Lincoln); the dam of Dismal (undefeated winner of (1738 King's Plate Ipswich, 1739 King's Plates Guildford, Salisbury, Canterbury, Lincoln);

and an unnamed mare which is 5th dam of high class racehorse Delpini, sire of Symmetry (1798 St Leger), Scotia (1802 Oaks) and Theophania (1803 Oaks)

Champion Sire in 1728