I am looking to further my ancestry, but am stuck at my 3x great grandfather...Isaac N. McMillan. Know he was born in Clinton County, Ohio in 1839. Would like to find birth record so i can get his parents and siblings names. Got a tip from a gentleman on here, says he may have 3 brothers; Benjamin, Shipley and Jonathan. Father's name might be Newton McMillan? Anyone else with family ties/info? Isaac lived most of his adult life in Wabash county, Indiana. Was a captain in the civil war from 1862-65. Indiana 75th infantry, company A. Died in 1877, was married to Mary Priscilla Cary. One daughter, Algie A. McMillan Harris.