Frances Regina Giallorenzi (1950-2017), of Riverdale, on December 13th; wife of Andrea Mistri; mother of Alessandra Mistri; sister of Thomas; long-time and beloved teacher at Riverdale Country School.  Reposing Friday 5-9 pm at Riverdale-on-Hudson Funeral Home, 6110 Riverdale Ave. at West 261st Street , Bronx.  Mass of Christian Burial Saturday 9:45 am at St. Margaret of Cortona Church, 6000 Riverdale Ave.  Interment Gate of Heaven Cemetery.  In lieu of flowers, charitable contributions may be made to The American Cancer Society.