page_title: Byerley Turk
section_title: Stud record
hierarchical_section_title: Byerley Turk / Stud record
caption_attribution_description: Partner (also known as Croft's Partner or Old Partner), a good Thoroughbred racehorse, and a Leading sire in Great Britain and Ireland four times.
context_page_description: The Byerley Turk, also spelled Byerly Turk, was the earliest of three stallions that were the founders of the modern Thoroughbred horse racing bloodstock.
context_section_description: In 1692, Captain Byerley married his cousin, Mary Wharton (sole heir to the estate of Goldsborough, near Knaresborough, North Yorkshire, England) and moved to live with her at her family home of Goldsborough Hall. After Byerley retired (as Colonel Byerley), the Byerley Turk retired to stud, first at Middridge Grange, then, from 1697, at Goldsborough Hall. The Byerley Turk died there in 1706 and it is believed he is buried close to the Hall. Goldsborough Hall is now a private family home that offers accommodation, which includes the commemorative Byerley suite.
  He did not cover many well-bred mares, but his most significant sons include:
  Black Hearty, black colt born c. 1695, "a famous Horse of Sir George Fletcher"
  Grasshopper or Bristol Grasshopper, c. 1695, won the Town Plate at Nottingham under 10 stone
  Jigg, c. 1701, a bay colt of middling ability who became the sire of Partner, a four-time leading sire. Partner sired Tartar, who was the sire of Herod (1738). Herod founded one of the three sire lines from which all modern Thoroughbreds descend, the other lines being founded by Eclipse and Matchem.
  Basto, a nearly black colt born c. 1704, who won several match races from 1708 to 1710. Basto sired Old Ebony, the foundation mare of family #5.
  The Byerley Turk also sired several highly influential daughters, most of whose names do not survive. They are generally classified by the female family that they belong to:
  Byerley Turk mare, a black or brown daughter out of Tarfollet Barb mare, through whom all modern members of family #1 descend. Family 1 is estimated to account for 15% of all thoroughbreds, and has been divided into several sub-families for ease of reference. For example, family 1-k, the family of Frankel among many others, traces back through several branches to family 1-a, Bonny Lass, a grand-daughter of the Byerley Turk mare. As of 2010, there were 33 Epsom Derby winners, 31 St. Leger winners, and 40 winners of The Oaks Stakes listed in family 1 as descendants of the Byerley Turk mare
  Bowes' Byerley Turk mare, the "Dam of the Two True Blues", the taproot of family 3. Though not as widespread as family 1, many classic winners around the world trace back to family 3. As of 2010, there were 25 Derby winners, 26 Oaks winners and 20 St Leger winners from family 3
  The Byerley Turk mare out of Bustler Mare, the taproot of family 8, which has produced 7 Oaks winners, 11 Derby winners, and 15 St Leger winners including Nijinsky
  The Byerley Turk mare that was the taproot of family 17, which has produced 2 Oaks and 3 St Leger winners
  The Byerley Turk mare that was the taproot of family 41
caption: Partner, grandson of the Byerley Turk, grandsire of Herod
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