Ferro's dam is mainly of German descent, Brenda (ster pref prest) is by the Holsteiner "keur" stallion Farn, who also has ranked highly in the jumping index. Farn broke the service records. In 1979 he was offered 236 mares. In 1978 he had been awarded the 'keur' predicate, in 1991, he was declared 'preferent', seven years after his death. He left eleven approved sons, 123 'ster', 31 'keur', 14 'preferent' and 6 'prestatie' mares. Farn has become best known through his ‘‘preferent’’ son Nimmerdor, ‘’stallion of the century 2000’’.