Dam of Merry Duchess (by Speculum), Your Grace (by Galliard), Alix (by Hagioscope) and Sweet Duchess (by Hagioscope) through each of which the maternal line of this branch of the family continues

The many high and top class racehorses which descend from Grand Duchess include Our Lassie (1903 Oaks), Your Majesty (1908 St Leger(, Parth (1923 Prix de l'Arc de Triomphe), Manna (1925 2000 Guineas, Derby), Mr. Jinks (1929 2000 Guineas), Sandwich (1931 St. Leger), Imprudence (1947 1000 Guineas, Oaks, Poule d'Essai des Pouliches),

Mill Reef (1971 Derby, Eclipse Stakes, King George VI and Queen Elizabeth Stakes, Prix de l'Arc de Triomphe), Blushing Groom (1977 Poule d'Essai des Poulains), Gold River (1980 Prix Royal-Oak, 1981 Prix de l'Arc de Triomphe), Holding Court (2000 Prix du Jockey Club), Finsceal Beo (2007 1000 Guineas), Encke (2012 St Leger) and many other worldwide classic winners