O'Keefe, Madeline (DeCerbo) of Concord MA, daughter of the late John and Louise DeCerbo, formerly of Madison and North Haven CT died peacefully on March 18th. Loving and generous mother, nana, sister, aunt and friend, her greatest joy came from bringing happiness to others. Devoted mother to Lynn and her husband Paul Juliano of Columbia MD, Gail and her husband Doug Melton of Lexington MA, Jim and his wife Heather also of Lexington, and Erin and her husband Gary Kania of Stafford VA. Beloved grandmother of Jasin, Emma, Jimmy, Daniel, Sam and Chris, there was a deep and special bond between each of her grandchildren and their Nana. She is also survived by her dear brother and sister, Donald DeCerbo and Ann Marie Acri, along with nieces Donna, Doreen and Alanna, nephews Douglas and Anthony and their families, all of whom she loved very much. Madeline was an avid bridge player, and she cherished the time spent with the many close friends that she made through bridge. Always a beautiful smile on her face, she lived a simple and grateful life, and her kind and gentle spirit will always be felt by family and friends. In lieu of flowers, donations may be made to the Council on Aging of Concord or the Harvard Stem Cell Institute for Diabetes Research. To share a remembrance in her online guest book, please visit www.deefuneralhome.com.