When Theodore Martin Winterhoff was born on 28 December 1873, in St. Louis, St. Louis, Missouri, United States, his father, Andres Johannes Jacob Richard Winterhoff, was 30 and his mother, Gerdina Theodore Tonissen, was 33. He married Ida Boehr about 1900. They were the parents of at least 1 son and 1 daughter. He died on 23 October 1944, in St. Louis, St. Louis, Missouri, United States, at the age of 70.
From the French form of the Greek name Theodōros, derived from theos ‘god’ + dōron ‘gift’. The name was popular among early Christians and was borne by several saints.