Age 99, longtime resident of Mt. Lebanon and originally from Welland, Ontario, on Monday, June 8, 2020. Beloved wife of the late Frederick E. Thieroff; sister of Dori Haller, the late Kathryn Steigerwald, Eleanor McDermott, Gertrude Hatch, Elizabeth Fitzpatrick, Velma Wolf, Claire "Larry" Hatch and Merrill "Red" Hatch; she was the loving, generous and light-hearted aunt of the Steigerwald, McDermott, Haller, Wolf and Hatch children of Mt. Lebanon. Louise was a retired office manager for Gulf Oil. Services and interment were private. Laughlin Cremation & Funeral Tributes
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