Oliver F. Trudell (c.1844-c.1920) was born in New York and most likely died in Wisconsin. During the Civil War, he enlisted as a private in the Wisconsin 21st Volunteer Infantry regiment. After the war, he worked as a lawyer, maintaining a practice in Oconto, Wisconsin. While living in Oconto, he became interested in Christian Science when his wife, Harriet Trudell, received Christian Science treatment through prayer from Jennie E. Sawyer, a student of Mary Baker Eddy's. Although he expressed an interest in Christian Science, there is no record of him studying with Mary Baker Eddy or uniting with the Church of Christ (Scientist).

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