Thomas Bay Pedigree
| Sire: Westmoreland The Lottery Horse* | Sire: Amos Wiltshire’s Old Horse Sam | Sire: Eddie Alcock’s The Old Black Horse |
| Dam: Foundation Stock | ||
| Dam: Wiltshire’s Red & White Mare Matilda | Sire: Foundation Stock | |
| Dam: Foundation Stock | ||
| Dam: Miss Lucky Lady | Sire: The Producer | Sire: The Road Sweeper UK |
| Dam: Bobby Rayfield’s Good Mare | ||
| Dam: Tom Price’s Bay Mare | Sire: Reginald Jordan’s Stallion | |
| Dam: The Chestnut Blagdon Mare |
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