- Born November 12, 1892 in Ironton, Iron County, Missouri.
- Parents were WALDO WEBSTER HEYWOOD and AMANDA PANNEBECKER.
- Married PERLE MARIE CONWAY on December 25, 1919 in Iron County, Missouri. She was born February 2, 1896 on Leeper, Wayne County, Missoir; died April6, 1963 in Overland, St. Louis County, Missouri. Her parents were JOHN SHELBY CONWAY and MINNIE BELLE GENTRY.
- Died February 3, 1963.
- Both Oscar and Perle are buried in Laurel Hill Memorial Gardens, Pagedale, St. Louis County, Missouri.
CHILDREN
- KENNETH W. HEYWOOD, born September 20, 1925 in Missouri; died July 20, 2005 in Missouri.
- NORMA LOIS HEYWOOD, born January 8, 1926 in Missouri; died April 25, 1985 in San Diego County, California. Married MILLER LEMONT STEELE, Jr..
- WILLIAM E. HEYWOOD, born in 1928 in Missouri.
- DONALD A. HEYWOOD, born in 1936; died in 1977.
- DORIS C. HEYWOOD, born in 1937; died in 2014.