Dennis Vearl Barngrover was born on December 28, 1901 in Jefferson County, Iowa United States to William Louis Barngrover and Lucy Mae Russell Barngrover, and had siblings David Earl Barngrover and Lowell E. Barngrover. He was the parent of Dennis Vearl Barngrover II. He married Nola Josephine Browning Barngrover on November 17, 1934, and they were married until Dennis' death on September 23, 1973. They had children Delvin Edward Barngrover, Yuvonne Sybia Barngrover Hicks, Tyla May Barngrover, Veda Rose Barngrover(Gentry), and Wendell Louis Barngrover.