Beatrix Mary McMahon nee O'Donnell, age 78, of Oak Park; wife of the late Martin Thomas McMahon; mother of Brenda (Michael Levine), Donald (Vivian) and the late John McMahon; grandmother of Niall, Dillon and Melissa McMahon; sister of Donald (Audrey), John (the late Mavis), Bridget Boggs, Brenda (Roger) Tworsey and the late Patrick (Mary) O'Donnell; mother-in-law of Laura (Eric Buehlman) McMahon; aunt of many. Bea was a senior advocate and caregiver for many years in the Oak Park area. Visitation Sunday 3 to 8 p.m. at Drechsler, Brown & Williams Funeral Home, 203 S. Marion St., Oak Park. Prayers 9:15 a.m. Monday to St. Bernardine Church for Mass at 10 a.m. Interment Cemetery. Info: drechslerbrownwilliams.com or 708-383-3191.