Cranberry Twp. - Mary D. (Hannegan) Theis, age 95, of Cranberry Township/Mars, formerly of McKees Rocks, passed away peacefully on Wednesday, April 16, 2025. Beloved wife of 47 years to the late John "Jack" Theis. Loving mother of Howard (Cynthia) Theis, Bernard (Kathy) Theis, and Mary Linn (Martin) Dorsch; also survived by eight grandchildren and nine great-grandchildren; brother-in-law, Donald (Ardith) Theis; and nieces and nephews. Mary was preceded in death by a grandson, Michael; three brothers; two sisters; and daughter-in-law, Debbie. She was an avid Pittsburgh Steelers, Pirates, and Penguins Fan. Mary enjoyed entertaining and especially loved spending time with her grandchildren. She will be dearly missed by her family and friends. The family would like to thank the staff and caregivers of Harmony Hills as well as Bridges Hospice for the care and compassion given to their mother. Relatives and friends received Wednesday, April 23, 2025, from 2-4 and 6-8 PM at McDERMOTT FUNERAL HOME, 334 Forest Grove Road, Coraopolis (Kennedy Township), PA 15108. Funeral prayer Thursday, April 24, 2025, at 9:15 AM at the funeral home followed by Mass of Christian Burial at 10 AM in Archangel Gabriel Parish, St. Malachy Church, 343 Forest Grove Road, Kennedy Township. Interment Resurrection Catholic Cemetery, Moon Township. In lieu of flowers, contributions in Mary's memory may be made to Cribs for Kids, 5450 Second Avenue, Pittsburgh, PA 15207 (www.cribforkids.ord) or St. Jude Children's Research Hospital, 501 St. Jude Place, Memphis, TN 38105 (www.stjude.org).

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