| Bachelor's Button | 1899 | Matchem系 |
| Bachelor's Double | 1906 | Bend Or系 |
| Bacteriophage | 1929 | The Tetrarch系 |
| (アラ) Bad Afas | 1940 | Arab父系 |
| Bahram | 1932 | Blandford系 |
| Bakony | 1899 | Bend Or系 |
| Baldski | 1974 | Nijinsky系 |
| Balladier | 1932 | Himyar系 |
| Balloch | 1939 | Pot 8 o's系 |
| Ballyeaston | 1916 | Matchem系 |
| Ballymoss | 1954 | Mossborough系 |
| Balmerino | 1972 | Brantome系 |
| Barbizon | 1954 | Sickle系 |
| Barcaldine | 1878 | Matchem系 |
| Bartlet's Childers | 1716 | Eclipse系 |
| Bassetlaw | 1890 | St. Simon系 |
| Battant | 1942 | Phalaris系 |
| Battle Joined | 1959 | Himyar系 |
| Baverstock | 1911 | St. Simon系 |
| Bayardo | 1906 | Hampton系 |
| Baydrop | 1918 | Hampton系 |
| Baynoun | 1981 | Hurry On系 | Bay Middleton | 1833 | Herod系 |
| Bay Ronald | 1893 | Hampton系 |
| Beadsman | 1855 | Eclipse系 |
| Beauclerc | 1875 | Eclipse系 |
| Beau Pere | 1927 | Son-in-Law系 |
| Beau Son | 1938 | Son-in-Law系 |
| Bel Bolide | 1978 | Bold Ruler系 |
| Bel Canto | 1943 | Son-in-Law系 |
| (アア) Belligueux Turk | ---- | Arab父系 |
| Bellini | 1937 | St. Simon系 |
| Bellotto | 1984 | Mr. Prospector系 |
| Bertolini | 1996 | Danzig系 |
| Be My Guest | 1974 | Northern Dancer系 |
| Ben Brush | 1893 | Pot 8 o's系 |
| Bend Or | 1877 | Pot 8 o's系 |
| Beppo | 1903 | Matchem系 |
| Bering | 1983 | Native Dancer系 |
| Bernborough | 1939 | Hampton系 |
| Bernstein | 1997 | Storm Bird系 |
| Bertrando | 1989 | Intent系 |
| Best Man | 1890 | Pot 8 o's系 |
| Best Turn | 1966 | Royal Charger系 |
| Better Bee | 1954 | King Fergus系 |
| Better Boy | 1951 | My Babu系 |
| Big Game | 1939 | Blandford系 |
| Big Spruce | 1969 | Son-in-Law系 |
| Bigstone | 1990 | Northern Dancer系 |
| Bikala | 1978 | ゼダーン系 |
| Bill of Portland | 1890 | St. Simon系 |
| Birdchacher | 1833 | Pot 8 o's系 |
| Biribi | 1923 | St. Simon系 |
| Birkhahn | 1945 | Hampton系 |
| Biscay | 1965 | Hyperion系 |
| Blacklock | 1814 | King Fergus系 |
| Black Tarquin | 1945 | Pharos系 |
| Black Toney | 1911 | Himyar系 |
| Blair Athol | 1861 | Pot 8 o's系 |
| Blairfinde | 1891 | Bend Or系 |
| Blandford | 1919 | Swynford系 |
| Blarney Kiss | 1965 | Royal Charger系 |
| Blenheim | 1927 | Blandford系 |
| Bletchingly | 1970 | Hyperion系 |
| Blink | 1915 | King Fergus系 |
| Blinkhoolie | 1864 | Pot 8 o's系 |
| Bluebird | 1984 | Storm Bird系 |
| Blue Moon | 1936 | St. Simon系 |
| Blue Peter | 1936 | Fairway系 |
| Blushing Groom | 1974 | Red God系 |
| Bobsleigh | 1932 | Hampton系 |
| Bois Roussel | 1935 | St. Simon系 |
| Boissier | 1943 | Bois Roussel系 |
| Bojtar | 1887 | Pot 8 o's系 |
| Bold Bidder | 1962 | Bold Ruler系 |
| Bold Commander | 1960 | Bold Ruler系 |
| Bold Forbes | 1973 | Bold Ruler系 |
| Bold Lad | 1964 | Bold Ruler系 |
| Boldnesian | 1963 | Bold Ruler系 |
| Bold Reasoning | 1968 | Bold Ruler系 |
| Bold Ruckus | 1976 | Bold Ruler系 |
| Bold Ruler | 1954 | Nasrullah系 |
| Bona Vista | 1889 | Bend Or系 |
| Bonnie Scotland | 1853 | Pot 8 o's系 |
| Borealis | 1941 | Teddy系 |
| Boston | 1833 | Herod系 |
| Bosworth | 1926 | Son-in-Law系 |
| Botticelli | 1951 | Fairway系 |
| Boundary | 1990 | Danzig系 |
| Bramble | 1875 | Pot 8 o's系 |
| Brantome | 1931 | Blandford系 |
| Brazen | 1923 | Phalaris系 |
| Bridge of Earn | 1906 | Bend Or系 |
| British Empire | 1937 | Phalaris系 |
| Broad Brush | 1983 | Himyar系 |
| Broomstick | 1901 | Pot 8 o's系 |
| Bruleur | 1910 | Herod系 |
| Brumeux | 1925 | Teddy系 |
| Bubbles | 1925 | Pot 8 o's系 |
| Buccaneer | 1857 | Herod系 |
| Buchan | 1916 | King Fergus系 |
| Buckaroo | 1975 | Tom Fool系 |
| Buckpasser | 1963 | Tom Fool系 |
| Buisson Ardent | 1953 | Relic系 |
| Bull Dog | 1927 | Teddy系 |
| Bull Lea | 1935 | Teddy系 |
| Bureaucracy | 1987 | Hyperion系 |
| Busted | 1963 | Blenheim系 |
| Bustino | 1971 | Blenheim系 |
| Buzzard | 1787 | Herod系 |
| Byerley Turk | 1680 | Herod系 |