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Gabe Agyei
Yesterday
I worked with GT at Inova Fairfax Hospital Radiation Oncology Department for years. He gave me this plant and vase and asked me to take care of it, and I have. I will always have a piece of him with me when I look at the antique. The last I saw the great Dr. Tonnesen as I always called him, was at a retirement party for physicist colleague Dave George, he said I'm not sure about great, because my hearing is not so great anymore and we laughed, but he looked amazing. I will miss him dearly, he was a great mind, a leader, teacher, and a mentor. May his soul Rest well in the Lord.
Dick Giauque
July 13, 2025
The name Lorin came originally from my dad Lorin Giauque. He and my mom Irene were fishing, poker, bridge etc. buddies of "Uncle Chet and Aunt Ede" Tonnesen for,as long as I can remember. I always thought that Roger and Lorin were "cousins", because of the long and close relationship of our parents.
Glenn sounds like a terrific person...wish we had known him...best to the family he leaves.
Kay Howells
July 11, 2025
The Tonnesen family and I were neighbors in Holladay. Glenn was already out of the area but I got to know him as he and Meredith returned for visits. He was part of a wonderful family and I feel for the loss to his sisters.
Craig Stevenson
July 10, 2025
My sincere condolences to the family. Glenn was a wonderful person.
Ann (Smith) Green
July 10, 2025
Glenn and I lived across the street from each other. He was my oldest, longtime childhood playmate. Our families were inseparable, we shared many fun times, endless birthday parties, bridge club swim parties and much more. My family moved to the Millcreek area when I was in the First Grade. Shortly after that, the Tonnesen's moved just blockes from us so we could continue the strong bond our families shared. My thoughts and prayers are with all of you during these rough times. Rest in peace my dear friend, Glenn.
josh oppenheim
July 10, 2025
Glenn was a great colleague. We shared several patients with head and neck cancer and he always made time to discuss the cases so we could provide the best care possible. His great caring for his patients was very evident, and so many patients asked me about him after he left Fairfax. They always say how much they liked him. He always made me feel like I was his favorite doctor too.
Angesom Gebrekidan
July 9, 2025
Dr. Tonnesen was a great doctor and an amazing human being. I remember my very 1st clinical rotation started with doctor Tonnesen, using old school simulator. An excellent teacher and mentor, Simply the best. I am sad to hear his passing. May God rest his soul in heaven. My deepest condolence to the entire Glenn Family.
Mary Sue Just
July 9, 2025
I just wanted to add when I was going through breast cancer treatments at Fairfax he was so encouraging and kind to both me and my husband
Mary Sye Jyst
July 9, 2025
So sorry to hear this. He was a great guy I worked with him in Fairfax . So sorry for your loss
Naveed Iqbal
July 8, 2025
I will always remember Dr. Tonnesen for the positive attitude and the care he provided for his patients . You will be deeply missed
Bea Catbay
July 8, 2025
I worked with GT( as we fondly called him at work ) in Radiation Oncology Department at INOVA Fairfax Hospital for so long . He has impeccable bedside manner , willing to teach you all about radiation therapy and its side effects, he loves his patients and oh boy his patients loved him back . I remember one of his patients called him George Clooney . It was always a pleasure working with him . I remember him fondly talking about his fun experiences going to the pawn shop and Costco.. Thank you GT for sharing with me the passion and loving what you love to do .. As I told you before you have the most brilliant mind of a Radiation Oncologist and it´s my pleasure working and knowing you . Rest in eternal peace... I missed you already.. Bea Catbay , RN BSN
Alan Eastman
July 4, 2025
Glenn and I were friends in Junior High, and followed much the same path, though I ended up in chemistry rather than medicine. I wish we had had more time to talk with each other and share retirement hobbies! He was a good friend and a good person - he will be missed.
Dayna N Madsen
July 4, 2025
My mother and Glenn's mother were in the same bridge club many years ago. I have many fond memories. Swimming parties, etc. I am sorry to hear about your loss. May you be comforted in knowing so many people are thinking of you at this time.
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