 Nethery was one of five siblings born in Lewisville, Arkansas to Daniel Thompson "Tom" Nethery (1890–1966) and his wife, the former Ruby Estelle Byrd (1892–1982).She was married to Clu Gulager – who played Billy the Kid on the NBC television series, "The Tall Man" – from 1960 to 1962.Their sons are Tom and John Gulager.