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- [S5] 1940 United States Federal Census, https://www.myheritage.com/research/record-10053-843702881/francis-c-theisen-in-1940-united-states-federal-census.
Francis C Theisen Gender: Male Birth: Circa 1926 - Wisconsin, USA Residence: 1940 - 38 Wanbesa St, Madison, Dane, Wisconsin, USA Age: 14 Residence in 1935: Same House - 38 Wanbesa St, Madison, Dane, Wisconsin, USA Race: White Marital status: Single Parents: Michael J Theisen, Lillian O Theisen Siblings: Vincent L Theisen, Kenneth M Theisen, Dorthy L Theisen Census: Incorporated place:MadisonEnum. District:13-59Family:568
- [S8] 1930 United States Federal Census, https://www.myheritage.com/research/record-10134-273065620/francis-theisen-in-1930-united-states-federal-census.
Francis Theisen Gender: Male Birth: Circa 1926 - Wisconsin, United States Residence: 1930 - Madison, Dane, Wisconsin, USA Age: 4 Marital status: Single Race: White Language: English Father: Michael J Theisen Father's birth place: Wisconsin, United States Mother: Lillian Theisen Mother's birth place: Wisconsin, United States Siblings: Vincent Theisen, Kenneth Theisen Census:
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