- Born: Abt 1818, Perry Township, Lawrence Co., Ohio
- Marriage: Letha Jenkins
- Died: After 1850, Perry Township, Lawrence Co., Ohio
The 1850 Federal Census for Perry Township, Lawrence Co., Ohio, page 369A, dated August 12, 1850 records Theodore Melvin (31) with children Alice (12), John (8), Anna (6), and Phebe (3). They are living next door to Theodore's parents, Jonathan and Anna Melvin. Many other family members are listed in that household. Theodore's wife is not listed.
Theodore is not listed in the 1860 Census and his daughters Ann and Phebe are living with their widowed grand mother, Anna Melvin.
Theodore married Letha Jenkins. (Letha Jenkins was born circa 1818 and died circa 1848 in Perry Township, Lawrence Co., Ohio.)