Mary T. O'Leary (nee O'Rourke) Beloved wife of the late Brendan; loving mother of Margaret (Jon) Sandusky, Tim (Sherrie), James (Susan), Maureen (Ron) Girard, Sheila (Michael) Reilly, Brendan (Chris), Eileen (Jeff) O'Leary-Sorensen and Sean (Crystal); proud & cherished grandmother of twenty and great-grandmother of six; fond sister of Margaret (the late Dan) O'Donnell, James (Eva), Bernard (Georgia), Gerard, Vincent (Joan), Jack (Mary), Helen (John) Conran, Kevin (Mary Ann) and Brendan (May) O'Rourke. Dear aunt of many nieces and nephews.  Longtime volunteer and dedicated member of Mary Seat of Wisdom Parish and School. Dedicated to her family, faith and Irish community.  Visitation at Cooney Funeral Home, 625 Busse Hwy, Park Ridge Sunday from 2 to 8 p.m. Funeral Monday, 9:30 a.m. to Mary Seat of Wisdom Church.  Mass at 10:00 a.m.  Interment All Saints Cemetery.   In lieu of flowers, donations to Rainbow Hospice or Mary Seat of Wisdom would be appreciated. For info (847) 685-1002 – www.cooneyfuneralhome.com