^Sources give his title in different ways for example in the treaty between Spain and Great Britain 18/24 1604, Charles of Arenberg was a plenipotentiary and his name is recorded as Charles prince-count of ArenbergFrances Gardiner Davenport, Charles O. Paullin. European Treaties Bearing on the History of the United States and Its Dependencies, The Lawbook Exchange, Ltd., 2004 ISBN1584774223, 9781584774228 pp. 246, 257