 During the Count's Feud, in 1535, Gerdrup is in a cover letter listed as belonging to Knud Rud, but Søren Stampe is later once again mentioned as the owner.After Stampe's death, Gerdrup passed to his son-in-law Peder Markvardsen Hundermark, who served in the Kalmar War (1611-13) under his uncle, Herluf Trolle, A great-grandson, Erik Hundermark, was the last male member of the Hundermark family.After his death, Gerdrup passed to his sisters, Eline and Anne Hundermark.