When Theodore J William Yager was born on 15 June 1907, in Barron, Wisconsin, United States, his father, Edward John Jaeger/Yager, was 27 and his mother, Mary E. Kramer, was 20. He married Rose Albina Wasko on 4 January 1937, in Clark, Indiana, United States. He lived in Election District 1 Evanston, Uinta, Wyoming, United States in 1940 and Wisconsin, United States in 1978. He died in February 1978, in Barron, Wisconsin, United States, at the age of 70.