Obituary: Mary L. Keniston

By obituaries///4/7/2026

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![Mary L. Keniston](https://www.pressherald.com/wp-content/uploads/sites/4/2026/04/kennison.jpg?w=263) PORTLAND - Mary L. Keniston, 89, passed away at Seaside Healthcare Center in Portland on April 1, 2026, after a brief .