Mumatz Mahal became an important ancestress in the pedigrees of some of history's most influential sire lines, including Nasrullah, Royal Charger, Tudor Minstrel and Mahmoud. Nasrullah sired Bold Ruler, the sire of the Seattle Slew/A.P. Indy modern stallion lines. Bold Ruler is possibly most famous for producing Secretariat, renowned for his stamina and also an influential broodmare sire. Nasrullah also produced the lines leading to Red God (1954), Grey Sovereign (1956) and Never Bend (1960). The Tetrarch also sired Paola (who won the 1923 Coronation Stakes) and The Satrap (champion two-year-old of 1926).