When Seymour Beeman was born in 1840, in Lawrenceville, Tioga, Pennsylvania, United States, his father, Havilah Beeman, was 42 and his mother, Lorenda, was 35. He married Melvena Mc Curtin on 17 June 1863, in Harrisburg, Dauphin, Pennsylvania, United States. He died on 28 October 1887, in Philadelphia Monthly Meeting, Philadelphia, Pennsylvania, United States, at the age of 47.