| Pag Asa | 1975 | Hyperion系 |
| Pago Pago | 1960 | Fairway系 |
| Palestine | 1947 | Fair Trial系 |
| Pall Mall | 1955 | Fair Trial系 |
| Pancho Villa | 1982 | Bold Ruler系 |
| Panorama | 1936 | Bend Or系 | Pantaloon | 1824 | Herod系 |
| Papyrus | 1920 | Pot 8 o's系 |
| Pardal | 1947 | Pharis系 |
| Pardao | 1958 | Pharis系 |
| Parnasse | 1869 | Pot 8 o's系 |
| Partisan | 1811 | Herod系 |
| Partner | 1718 | Herod系 |
| Parwiz | 1925 | Phalaris系 |
| Patrobas | 1912 | Pot 8 o's系 |
| Paulowitz | 1813 | Herod系 |
| Persian Bold | 1975 | Bold Ruler系 |
| Persian Gulf | 1940 | Blandford系 |
| Persimmon | 1893 | St. Simon系 |
| Personal Hope | 1990 | Storm Bird系 |
| Perth | 1892 | King Fergus系 |
| Pasztor | 1881 | Pot 8 o's系 |
| Peter Pan | 1904 | Himyar系 |
| Petingo | 1955 | Fair Trial系 |
| Petition | 1944 | Fair Trial系 |
| Petoski | 1982 | Nijinsky系 |
| Petrarch | 1873 | Pot 8 o's系 |
| Petrillo | 1905 | Pot 8 o's系 |
| Phaeton | 1865 | Pot 8 o's系 |
| Phaeton | 1964 | Prince Bio系 |
| Phalaris | 1913 | Bend Or系 |
| Pharamond | 1925 | Phalaris系 |
| Pharis | 1936 | Pharos系 |
| Pharly | 1974 | Lyphard系 |
| Pharos | 1920 | Phalaris系 |
| Pherozshah | 1934 | Pharos系 |
| Phil Drake | 1952 | King Fergus系 |
| Phone Trick | 1982 | Nearctic系 |
| Pietermaritzburg | 1898 | St. Simon系 |
| Pipe of Peace | 1954 | Hurry On系 |
| Pirate of Penzance | 1882 | Pot 8 o's系 |
| Pinceau | 1925 | King Fergus系 |
| Pine Bluff | 1989 | Danzig系 |
| Pink Flower | 1940 | Hampton系 |
| Pinza | 1950 | Bend Or系 |
| Planet | 1855 | Eclipse系 |
| Plassy | 1932 | Son-in-Law系 |
| Platini | 1989 | Hampton系 |
| Plaudit | 1895 | Himyar系 |
| Pleasant Colony | 1978 | Ribot系 | Pleasant Tap | 1987 | Ribot系 | Plugged Nickle | 1977 | Ribot系 |
| Plunus | 1915 | Hampton系 |
| Plutus | 1863 | Pot 8 o's系 |
| (アラ) Pohaniec | 1965 | Arab父系 |
| Polemarch | 1918 | The Tetrarch系 |
| Polish Precedent | 1986 | Danzig系 |
| Polycrates | 1911 | Bend Or系 |
| Polymelian | 1914 | Bend Or系 |
| Polymelus | 1902 | Bend Or系 |
| Polynesian | 1942 | Sickle系 |
| Porterhouse | 1951 | Phalaris系 |
| Portrush | 1910 | Pot 8 o's系 |
| Pot 8 o's | 1773 | Eclipse系 |
| Precipitation | 1933 | Hurry On系 |
| Preciptic | 1942 | Hurry On系 |
| Premonition | 1950 | Hurry On系 |
| Pretense | 1963 | Phalaris系 |
| Priamos | 1964 | Hampton系 |
| Pride | 1891 | Hampton系 |
| Pride of Prussia | 1877 | Pot 8 o's系 |
| Prince Bio | 1941 | Prince Rose系 |
| Prince Charles | 1888 | Pot 8 o's系 |
| Prince Charlie | 1869 | Pot 8 o's系 |
| Prince Chevalier | 1943 | Prince Rose系 |
| Prince Chimay | 1915 | St. Simon系 |
| Princely Gift | 1951 | Nasrullah系 |
| Prince John | 1953 | Princequillo系 |
| Prince Palatine | 1908 | St. Simon系 |
| Princequillo | 1940 | Prince Rose系 |
| Prince Regent | 1966 | Owen Tudor系 |
| Prince Rose | 1928 | St. Simon系 |
| Prince Taj | 1954 | Prince Bio系 |
| Prisoner | 1890 | Pot 8 o's系 |
| Private Account | 1976 | Teddy系 |
| Procida | 1981 | Mr. Prospector系 |
| Propicio | 1976 | Hyperion系 |
| Propontis | 1941 | Pharos系 |
| Psidium | 1958 | Pharis系 |
| Pulpit | 1994 | Bold Ruler系 |
| Purchase | 1916 | Bend Or系 | Purple Shade | 1921 | Herod系 |
| Put it Back | 1998 | Intent系 |