Nimmerdor, who died in 2003 at the age of 31, was named "stallion of the 20th century" by the Netherlands in 2000. He sired 18 approved sons, and 37 approved grandsons, including Goodtimes, Daimler, N-Aldato, Zadock, Nandor, Fortuna, Coronel, Amethist, Nimrod B, Norman, and Night and Day.
Nimmerdor's most famous son, Heartbreaker, is the father of his own dynasty, and Nimmerdor's grandsons include Hickstead, the 2008 Olympic gold medallist famously owned and ridden by Canadian Eric Lamaze, and De Sijem, the 2000 Olympic gold medallist from the Netherlands.
In the period 1992-2001, Nimmerdor offspring included 42 international jumpers, contributing to his 29th place for that period in the World Breeding Federation Sport Horse rankings. In total, Nimmerdor produced over 100 international show jumpers, dressage horses, and many highly predicated offspring.
Nimmerdor was by the Holsteiner stallion Farn, one of the "founding sires" of Dutch sport horses, and the only foal out of thoroughbred 1.20 m jumper Ramonaa. Ramonaa was by Senator, the son of another famous mare, Morgenster.