| Labus | 1971 | Blenheim系 |
| Ladas | 1891 | Hampton系 |
| Lando | 1990 | Hampton系 |
| La Farina | 1911 | Pot 8 o's系 |
| Landgraf | 1914 | Pot 8 o's系 |
| Laugh Aloud | 1961 | Tom Fool系 |
| La Varende | 1949 | St. Simon系 |
| Laveno | 1892 | Bend Or系 |
| Law Society | 1982 | Ribot系 |
| Lear Fan | 1981 | Roberto系 |
| Le Fabuleux | 1961 | Wild Risk系 |
| Le Haar | 1954 | Brantome系 |
| Le Lavandou | 1944 | Djebel系 |
| Le Levanstell | 1957 | Djebel系 |
| Lemberg | 1907 | Bend Or系 |
| L'Emigrant | 1980 | Northern Dancer系 |
| Lemon Drop Kid | 1996 | Mr. Prospector系 |
| Le Nain Jaune | 1979 | Lyphard系 |
| Leominster | 1890 | Matchem系 |
| Le Pacha | 1938 | St. Simon系 |
| Le Roi Soleil | 1895 | Pot 8 o's系 |
| Le Samaritain | 1895 | Herod系 |
| Le Sancy | 1883 | Herod系 |
| Levmoss | 1965 | Djebel系 |
| Lexington | 1850 | Herod系 |
| Lillolkid | 1941 | Pot 8 o's系 |
| Limond | 1913 | St. Simon系 |
| Lion Cavern | 1989 | Mr. Prospector系 |
| Literat | 1965 | Hampton系 |
| Little Current | 1971 | Native Dancer系 |
| Lochryan | 1901 | Pot 8 o's系 |
| Lomond | 1909 | St. Simon系 |
| Longbow | 1949 | Pot 8 o's系 |
| Long Tom | 1899 | Hampton系 |
| Loombah | 1900 | King Fergus系 |
| Loosen Up | 1973 | Never Bend系 |
| Lord Avie | 1978 | Sir Gaylord系 |
| Lord Ballina | 1979 | Hyperion系 |
| Lord Cilfden | 1860 | Pot 8 o's系 |
| Lord Gayle | 1965 | Sir Gaylord系 |
| Lord Gaylord | 1970 | Sir Gaylord系 |
| Lord Haward | 1905 | St. Simon系 |
| Lord Lyon | 1863 | Pot 8 o's系 |
| Lord Ronald | 1862 | Pot 8 o's系 |
| Lorenzaccio | 1965 | Clarion系 |
| Lost Code | 1984 | Ribot系 | Lost Soldier | 1990 | Danzig系 |
| Lottery | 1820 | Eclipse系 |
| Lough Foyle | 1911 | Pot 8 o's系 |
| Loup Sauvage | 1994 | Never Bend系 |
| Louviers | 1906 | Pot 8 o's系 |
| Love Wisely | 1893 | Pot 8 o's系 |
| Lo Zingaro | 1931 | Hampton系 |
| Lt. Stevens | 1961 | Nasrullah系 |
| Luciano | 1964 | Owen Tudor系 |
| Lucky Debonair | 1962 | Swynford系 |
| Luthier | 1965 | Clarion系 |
| Lycius | 1988 | Mr. Prospector系 |
| Lyphard | 1969 | Northern Dancer系 |