Mary A. (née O’Connell), age 66, passed away peacefully surrounded by her family, on Thursday, December 12, 2019. Mary was the daughter of the late Joseph and Marie (née Curran) O’Connell. She was the loving mother of Marie Pieffer (Mark) and the adoring grandmother of Mark Jr and Shawn Pieffer. Mary was the sister of Flossie and Terry Devlin and Joe and Betty Ann O’Connell. Relatives and friends are invited to her Viewing Thursday morning at 9:00 A.M. St. Katherine of Siena Church, Frankford Avenue, followed by her mass at 10:00 A.M. Donations, in lieu of flowers, are requested in Mary’s memory to CORA Services, 8540 Verree Road, Philadelphia, PA 19111 or coraservices.org/donations/