Waltham Mr. Donald N. Dion, of Waltham, died Thursday, April 20, 2006 at Newton-Wellesley Hospital. He was 56. Born in Waltham, he had been a longtime resident of the Walter E. Fernald Center in Waltham. Donald was a son of the late Collen A. (Palumbo) Dion, and leaves his father, Roland A. Dion of Waltham; 2 brothers, Roland A. Dion, Jr. of Norwood and Scott J. Dion of Waltham; one sister, Cheryl A. Marcou of Waltham and several nieces, nephews, aunts, uncles and cousins. Funeral services will be held privately. Memorial donations may be made to the Walter E. Fernald Association, 200 Trapelo Road, Waltham, MA 02452.