Darley Arabian Mare ( 牝 Darley Arabian )
 |-- Bay Bolton Mare ( 牝 Bay Bolton )
 |   |-- Partner Mare ( 牝 Croft's Partner )
 |   |   `-- Regulus Mare ( 牝 Regulus )
 |   `-- Lonsdale Bay Arabian Mare ( 牝 1736 鹿毛 Lonsdale Bay Arabian )
 |   |   |-- Regulus Mare ( 牝 Regulus )
 |   |   `-- Miss Ramsden ( 牝 1755 鹿毛 Cade )
 |-- Sister to Bonny Lass ( 牝 鹿毛 Bay Bolton )
 |   `-- Sultan ( 牡 1732 芦毛 Lonsdale Bay Arabian )
 |-- Godolphin Whitefoot ( 牡 1719 鹿毛 Bay Bolton )
 `-- Bonny Lass ( 牝 1723 黒鹿毛 Bay Bolton )
 |   |-- Partner Mare ( 牝 1735 鹿毛 Croft's Partner )
 |   |   |-- Naylor ( 牝 1748 鹿毛 Cade )
 |   |   |-- Spectator ( 牡 1749 鹿毛 Crab )
 |   |   |-- Tatler ( 牡 1754 鹿毛 Blank )
 |   |   `-- Julia ( 牝 1756 鹿毛 Blank )
 |   `-- Lonsdale Mare ( 牝 1736 鹿毛 Lonsdale Bay Arabian )
 |   |   |-- Regulus Mare ( 牝 Regulus )
 |   |   |-- Blank Mare ( 牝 Regulus )
 |   |   `-- Bonny Lass ( 牝 1751 鹿毛 Black Chance )