Isaac S. Blackwell (Parents) was born on 21 Oct 1872 in Wisconsin. He died on 21 Feb 1938 in Lafayette County, Wisconsin.
Isaac married Clara R. Hopper in 1893 in Waupaca County, Wisconsin. Clara R. Hopper was born circa 1876 in Waupaca County, Wisconsin. She died on 3 Jul 1910 in Wisconsin.
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Emily A. Blackwell was born in 1895 in Waupaca County, Wisconsin. She died on 26 May 1957 in Wisconsin.
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Frederick J. Blackwell was born on 9 Mar 1898 in Wisconsin. He died on 16 Feb 1952 in Waushara County, Wisconsin.
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Sally L. Blackwell was born in 1901 in Wisconsin. She died on 11 Mar 1944 in Wisconsin.
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Matthew D. Blackwell was born in 1904 in Wisconsin. He died on 6 Jul 1946 in Wood County, Wisconsin.