Theisen, John Clifford^{[1, 2, 3, 4, 5]}

1909 - 1987  (77 years)

• Name	Theisen, John Clifford
  Birth	20 Jul 1909	North Dakota, United States
  Gender	Male
  Death	Mar 1987	Gallatin, Montana, United States
  Person ID	I1116	Theisen & Allied Families
  Last Modified	9 Dec 2022

  
  

  Father	Theisen, Franciscus,   b. 12 Sep 1880, New Franken, Brown County, Wisconsin, United States d. 21 Mar 1962, Bozeman, Gallatin, Montana, United States (Age 81 years)
  Mother	Brick, Kathern Eugenie,   b. 5 Feb 1881, New Franken, Brown County, Wisconsin, United States d. 14 Apr 1967, Bozeman, Gallatin, Montana, United States (Age 86 years)
  Marriage	30 Jan 1907	New Franken, Brown County, Wisconsin, United States
  Family ID	F280	Group Sheet  |  Family Chart

  
  

  Family	Deegan Mellen, Kathryn,   b. Abt 1914   d. Yes, date unknown
  Marriage	20 Nov 1950	Laurin, Madison, Montana
  Family ID	F887	Group Sheet  |  Family Chart
  Last Modified	20 Mar 2026

  
  

• Sources

  [S1] FamilySearch Family Tree, https://www.myheritage.com/research/record-40001-923996676/john-clifford-theisen-in-familysearch-family-tree. John Clifford Theisen Gender: Male Birth: July 20 1909 - Washington Marriage: Spouse: Kathryn Deegan - Nov 20 1950 - Laurin, Madison, Montana, United States Death: Mar 1987 - Gallatin, Montana, United States Parents: <a>Franciscus Theisen</a>, <a>Catherine Eugene Theisen (born Brick)</a> Wife: <a>Kathryn Deegan</a> Brother: <a>Delwin Francis Theisen</a> [S8] 1930 United States Federal Census, https://www.myheritage.com/research/record-10134-202005521/j-clifford-theisen-in-1930-united-states-federal-census. J Clifford Theisen Gender: Male Birth: Circa 1910 - North Dakota, United States Residence: 1930 - Middle Creek, Gallatin, Montana, USA Age: 20 Marital status: Single Race: White Language: English Father: Frank Theisen Father's birth place: Wisconsin, United States Mother: Eugenie C Theisen Mother's birth place: Wisconsin, United States Brother: F Delwin Theisen Census: [S4] U.S. Social Security Death Index (SSDI), https://www.myheritage.com/research/record-10002-78969355/john-theisen-in-us-social-security-death-index-ssdi. John Theisen Birth: July 20 1909 Death: Mar 1987 Last residence: Belgrade, Montana 59714, USA SSN issuing state: [S6] 1920 United States Federal Census, https://www.myheritage.com/research/record-10133-153900481/clifford-j-theisen-in-1920-united-states-federal-census. Clifford J Theisen Gender: Male Birth: Circa 1910 - North Dakota, United States Residence: 1920 - Gallatin, Montana, USA Age: 10 Marital status: Single Race: White Ethnicity: American Can read: Yes Can write: Yes Father: Frank Theisen Mother: Eugenia Theisen Brother: Delwin F Theisen Census: [S405] Montana, County Marriages, 1865-1950. John Clifford Theisen & Kathryn Deegan Mellen&lt;br&gt;Marriage: Nov 20 1950 - Laurin, Madison, Montana&lt;br&gt;Husband: John Clifford Theisen&lt;br&gt;&nbsp;&nbsp;Birth: 1908&lt;br&gt;&nbsp;&nbsp;Age: 41&lt;br&gt;&nbsp;&nbsp;Father: Frank Theisen&lt;br&gt;&nbsp;&nbsp;Mother: Catherine Eugene Brick&lt;br&gt;Wife: Kathryn Deegan Mellen&lt;br&gt;&nbsp;&nbsp;Birth: 1914&lt;br&gt;&nbsp;&nbsp;Age: 35&lt;br&gt;Father: William S. Deegan&lt;br&gt;Mother: Nellie Whalen&lt;br&gt;Reference ID: item 1 cn 1981&lt;br&gt;GS Film number: 1905614&lt;br&gt;Digital Folder Number: 4351346&lt;br&gt;Image Number: 199