County of Mark
Dönhoff, (Polish: Denhoff, sometimes also Doenhoff) was a noble German family, first mentioned in 1282, from the County of Mark in Westphalia; their original seat was "Dönhof" near Witten which remained in the family until 1463. From 1303 until the 16th century a property called "Dönhoff" near Wetter (Ruhr) was also owned by the family.