Leo John Sunder was born on October 4, 1893, in St. Louis. He was the son of Johann Bernard Sunder, who was born in Germany, and Christina Ortbals. He worked as a machinist at the Hoyt Metal Company in Granite City, Illinois. He enlisted in the United States Army on October 5, 1917 and served until May 23, 1919. He was assigned to Company M, 109th Infantry Regiment, 28th Division, and fought in the Allied advance towards the Vesle River in France, where he survived a gas attack. He spent his remaining time in the military recovering from his wounds at a hospital. After his service ended, he returned to Hoyt Metal Company, and married Loretta O’Toole (born ca. 1900) of St. Louis in June 1926 in Cuba, Missouri. Leo Sunder died on September 19, 1955.

Edward R. Dependahl was born on December 16, 1895, in St. Louis. He enlisted in the United States Army on June 22, 1918, in Wyoming, and was discharged in 1919. He served at various military camps in the United States, including Camp Pike in Arkansas, before being sent to France as part of the American Expeditionary Forces. After returning home in 1919, he married Mildred O'Toole in St. Charles, Missouri. Before World War I, Edward worked as a rancher/cowboy in Wyoming, and after the war, he returned to St. Louis and became an automobile salesman. Edward and Mildred later ran a cafe and tavern. Edward Dependahl died on May 11, 1963.

Mildred O’Toole was born on May 6, 1897, in St. Louis, and Loretta O’Toole was born ca. 1900 in St. Louis. Their mother Elizabeth Robins was born in Germany, and their father John F. O’Toole was born in France. Mildred worked as a telephone company operator and later as an assistant manager at a café. Loretta worked at Southwestern Telephone before and during World War I. Mildred O’Toole Dependahl died on September 21, 1980.