William Maxwell Blackburn, b. 30 Dec 1828 at Carlisle, Sullivan County, Indiana, d. 29 Dec 1898 in Pierre, Hughes County, South Dakota, son of Alexander Blackburn & Delilah Polk. He married Elizabeth Powell in 1854 in Valparaiso, Porter County, Indiana.
William Wallace Blackburn, b. 1 Feb 1859 in Hollidaysburg, Blair County, Pennsylvania, d. 11 Dec 1931 in Pittsburgh, Allegheny County, Pennsylvania, son of Joseph H. Blackburn & Sarah J. McConell. He married Harriet Alice Bloom on October 20, 1886 in Hollidaysburg, Blair County, Pennsylvania.