Susan Ann (Hackenburg) Trethewey

October 3, 1942 ~ May 11, 2020 (age 77)


   Age 77 of Mount Lebanon, passed away on May 11, 2020 after a heroic battle with cancer. Susan was born in Shaker Heights, Ohio a daughter of the late Aubrey and Jane (Petrequin) Hackenburg on October 3, 1942.  She graduated from Hathaway Brown School in 1960 before attending Connecticut College where she graduated in 1964 with a B.A. in American History, and more importantly life-long friendships with her "CC 7".  After teaching for a year, she settled into her greatest calling as a Mom when she became a mother in 1965.

   For Sue, life revolved around Family and Faith.  While raising her five children, Sue was active as a homeroom parent, involved in the Markham Elementary School PTA, and the Mount Lebanon High School PTSA.  Her love for her kids and education manifested itself in the creation of special events like the Markham 6th Grade Graduation trip to Falcon Camp in Carrollton, Ohio and her annual year-end luncheon to thank her children’s teachers for their efforts.

   As her own kids got older, Sue casually started taking care of neighbors' children in her home. Her kindness, compassion and love for these children was shared by word of mouth.  Over the next 35 years, Sue cared for and embraced 90 children as part of her own family. When she was surrounded by children, her smile radiated and her heart was filled with joy. She provided quiet guidance to parents and left her loving imprint on so many. Her legacy of love and selflessness is felt well beyond the bounds of her immediate family.  Sue was the ultimate Mom.

   Beloved wife for 55 years of Bill H. Trethewey; devoted mother of Scott (Linda) Trethewey of Fort Lauderdale, FL, Heather (Sam) D’Alesandro of Mount Lebanon, PA, Liz (Keith) Schmitt of Durham, NH, Dick (Beth) Trethewey of Charleston, WV and Bob (Kelly) Trethewey of Ellicott City, MD.; loving grandmother of 17 between the ages of 7 and 26; cherished sister of  Eleanor (George) Chu of St. Paul, MN, Richard (Linda) Hackenburg, of Southport, NC, and Patricia (Gordon) Laflin of Englewood, FL.; also survived by nieces and nephews.

  A Graveside Service in Mount Lebanon Cemetery will be private.  Memorial contributions are appreciated in lieu of flowers to Southminster Presbyterian Church in Susan Trethewey’s memory (

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