Delfeld, Donald A. Of Greendale, passed away peacefully on October 31, 2009, after a courageous 12 year fight with Parkinson's disease and a blood disorder. Beloved husband of Bonnie for 55 years. Treasured dad of Kristin (Pino) Guadagno. Proud grandfather to Liliana, Giorgia and Livia. Further survived by sisters, Evelyn Lund and Delores (Dan) Zimmer, brother Ralph Delfeld, and sister-in-law Helen Delfeld. Preceded in death by his brother Frank Delfeld. Further survived by other relatives and friends. Donald was a proud employee of AC Spark Plug/Delco Electronics for over 30 years. A special thanks to Jan Mikicki, Dr. Jonathan Treisman for his bottomless bag of tricks, Dr. Paul Nausieda, and Dr. Brian Kopell.Visitation:A visitation will be held Wednesday, November 4, from 10:00-11:30 AM at St. Mary Catholic Faith Community Church, 9520 W. Forest Home Ave., Hales Corners.Service:Mass at 12:00 Noon.