| Habitat | 1966 | Sir Gaylord系 |
| Hackler | 1887 | Pot 8 o's系 |
| Hagioscope | 1878 | King Fergus系 |
| Hail to Reason | 1958 | Royal Charger系 |
| Hall Mark | 1930 | Bend Or系 |
| Halo | 1969 | Hail to Reason系 |
| Hambletonian | 1792 | King Fergus系 |
| Hampton | 1872 | Pot 8 o's系 |
| (アラ) Hamrah | 1904 | Arab父系 |
| Harbor Prince | 1969 | Princequillo系 |
| Hard Sauce | 1948 | Pharis系 |
| Hard Tack | 1955 | Pharis系 |
| Hard Work | 1967 | Owen Tudor系 |
| Harkaway | 1834 | Pot 8 o's系 |
| Harmonicon | 1910 | Himyar系 |
| Hastings | 1893 | Matchem系 |
| Hasty Road | 1951 | Teddy系 |
| Hatchet Man | 1971 | Blenheim系 |
| Hautboy | 1897 | St. Simon系 |
| Haut Brion | 1890 | St. Simon系 |
| Havoc | 1890 | Pot 8 o's系 |
| Havresac | 1915 | St. Simon系 |
| Hawaii | 1964 | Dante系 | He | 1915 | King Fergus系 |
| Heaume | 1887 | Pot 8 o's系 |
| Heliopolis | 1936 | Hyperion系 |
| Helioscope | 1951 | Hyperion系 |
| Hellespont | 1933 | Pharos系 |
| Henry the Seventh | 1958 | Owen Tudor系 |
| Herbager | 1956 | Son-in-Law系 |
| Hermit | 1864 | Pot 8 o's系 |
| Herod | 1758 | Herod系 |
| Herodote | 1918 | Herod系 |
| Heroic | 1921 | Bend Or系 |
| Herold | 1917 | Hampton系 |
| Hero's Honor | 1980 | Northern Dancer系 |
| High Cloud | 1916 | Himyar系 |
| Highest Honor | 1983 | ゼダーン系 |
| Highflyer | 1774 | Herod系 |
| High Top | 1969 | Dante系 |
| High Treason | 1951 | Dante系 |
| Hill Gail | 1949 | Teddy系 |
| Major Portion | 1955 | Fair Trial系 |
| Himyar | 1875 | Pot 8 o's系 |
| Hippodrome | 1904 | Himyar系 |
| His Highness | 1936 | Hyperion系 |
| His Majesty | 1968 | Ribot系 | Hoist the Flag | 1968 | Ribot系 |
| Hul a Hul | 1962 | Native Dancer系 |
| Hold Your Peace | 1969 | Princequillo系 |
| Hollister | 1914 | King Fergus系 |
| Holy Bull | 1991 | Himyar系 |
| Honest Pleasure | 1973 | Bold Ruler系 |
| Honeyway | 1941 | Fairway系 |
| Honour and Glory | 1993 | Intent系 |
| Hunter's Moon | 1926 | Hurry On系 |
| Hook Money | 1951 | Hampton系 |
| Hornbeam | 1953 | Hyperion系 |
| Horron | 1910 | Pot 8 o's系 |
| Hugh Lupus | 1952 | Djebel系 |
| Hula Town | 1986 | Sir Gaylord系 |
| Humphrey Clinker | 1822 | Matchem系 |
| Hurry On | 1913 | Matchem系 |
| Hyperbole | 1945 | Hyperion系 |
| Hyperion | 1930 | Hampton系 |