Otto Schroeder was married to Clara Rux January 24, 1917. Their children were: Erwin Martin Schroeder, Wilbert Otto Schroeder "Barney", Wilford Arthur Schroeder "Tex", Harry Leonard Schroeder. Harry is the father to John Schroeder, the donor. Clara Rux's siblings are: Anna, Hannah, Martha, William, Freida, Clara, Arthur, Alfred.