Della Allen. Longtime Dearborn resident. May 26, 2013. Loving mother of Kelly Brock, Lee Allen and Cliff Allen. Proud grandmother of 6 grandchildren and 1 great grandchild. Della is survived by many friends. There will be gathering for family and friends on Thursday at Hackett-Metcalf Funeral Home, 2640 Monroe Blvd. (near W. Outer Drive), Dearborn from 4:00 p.m. until the time of the Memorial Service at 6:00 p.m.