Rose Mary Cordes Marcellus, beloved mother, grandmother, and great-grandmother, passed away peacefully at home after a brief battle with cancer on Wednesday afternoon, May 8, 2013. Preceded in death by her husband, John Anthony Marcellus and her son, John Paul Marcellus. Rose Mary was born December 3, 1925, in Leon, Iowa, to Charles H. Cordes and Wynne Catherine Cash Cordes, and was a resident of Irving, Texas, for the last 65 years. She was a member of the St. Luke’s Altar Guild, Mothers Against Drunk Driving, and her Ladies’ Bridge Club. She retired from the University of Dallas in 1998 where she worked for 12 years. Her hobbies included sewing, reading, sightseeing, bird watching and watching her beloved Texas Rangers Baseball. She is survived by her remaining 12 children: Kathy Marcellus of Garland; Monica and husband Rick Winters of Irving; Eleanor Marcellus of Irving; Matthew Marcellus of Shreveport, LA; Anthony Marcellus of North Richland Hills; Michael Marcellus and Jan Martin of Blue Ridge; Peter and wife Theresa Marcellus of Flower Mound; Damian Marcellus of Irving; Rosie and husband Brian Blake of Irving; Christopher Marcellus of Grand Prairie; Amy Marcellus of Azle; and Alexandra Marcellus of Irving. In addition, Rose Mary is survived by 13 grandchildren: Aaron Anderson of Arlington; Joel Anderson and wife Lana of Dallas; Jason Anderson of Marietta, Oklahoma; Regina Marcellus of Crowley; Justin and wife Kristy Marcellus of Palestine; Allison Brodine of Dallas; Chancey Deming and husband Marcus of Mount Vernon; Colten Marcellus of North Richland Hills; Conner Marcellus of Irving; Samantha and Emily Blake of Irving; Holly Marrs and husband Jarrod of Houston; and Scarlet Winters of Boulder, Colorado. Her great-grandchildren are ten: Taylor Anderson of Arlington; Nadia Scalvo of Dallas; Isabella Anderson of Dallas; Luke Anderson of Dallas; Trevor Marcellus of Crowley; Audrey Marcellus of Crowley; Tyson, Sydney and Max Marrs of Houston; Karis Marcellus of Palestine. A Rosary was held on Monday, May 13, 2013, at 11:00 am, with a Funeral Mass following at 11:30 am at Holy Family of Nazareth Catholic Church in Irving. Committal services were held at 10 am Tuesday, May 14, 2013 at DFW National Cemetery in Dallas. Arrangements made by Brown’s Memorial Funeral Home.