We are sad to announce that on May 7, 2024, Jonathan L. S. Byrnes of Lexington, Massachusetts passed away. Family and friends are welcome to leave their condolences on this memorial page and share them with the family.

In the vast expanse of eternity, Jonathan shall find rest, cradled in the arms of everlasting peace. And as we bid Jonathan farewell, his loved ones carry with them the precious gift of his memory, a beacon of hope guiding them through the shadows of sorrow towards the light of a new dawn.

He was loved and cherished by many people including : his wife Marsha Byrnes (Feinman); his sons, Dan and Steve Byrnes; his daughters-in-law, Nicole Ledoux and Kristin Szatkiewicz Byrnes; his grandchildren, Edison, George and Adrian; and his siblings, Pamela Byrnes and Rick Jacobsen.

A funeral service was held on Friday, May 10th 2024 at 10:00 AM at the Temple Isaiah (55 Lincoln St, Lexington, MA 02421).

In lieu of flowers, remembrances may be made to Dana-Farber Cancer Center in gratitude to Dr. Chouieri, http://danafarber.jimmyfund.org. or the Experimental Model of Human Sarcoma Fund, https://together.uw.edu.