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Thomas Callahan — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Wadena-County, Minnesota
Our Model Tree links this Thomas Callahan across the 1930 and 1940 US Censuses in Wadena-County, Minnesota (XGBoost, ~Confirmed) — first a head (b.~1870), then head of a 7-person household.
Age 70
b. ~1870
Male
Head
Born: Minnesota
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Wadena-County, Minnesota |
| Surname | Callahan |
| Given Name | Thomas H. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 70 |
| Marital Status | Married |
| Birthplace | Minnesota |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Wadena |
| Additional Details | |
| Class of Worker | 0 |
| Hours Worked | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Minnesota |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
| Township / Ward | Verndale Village |
| Est. Birth Year | ~1870 |
Household Members
Census records only state relationship to the household head.
Pairwise kinship is derived (~90–95% accurate), not recorded.
Step/blended families and boarders can break it.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Thomas | Age | Birth yr |
|---|---|---|---|---|
| Thomas Callahan | Head | — | 70 | ~1870 |
| Gregor Callahan | Son | — | 32 | ~1908 |
| Muriel Callahan | Daughter | — | 18 | ~1922 |
| Francis Callahan | Son | — | 24 | ~1916 |
| Louie Callahan | Son | — | 35 | ~1905 |
| Anne Callahan | Spouse | — | 63 | ~1877 |
| Emmet Callahan | Son | — | 30 | ~1910 |
Census Appearances
1930
Wadena, Minnesota
Head, age 57
Wadena, Minnesota · implied b. ~1873 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Callahan |
| Given Name | Thomas F. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 57 |
| Marital Status | Married |
| Birthplace | Minnesota |
| Age at First Marriage | 20 |
| Father's Birthplace | Irish Free State |
| Mother's Birthplace | Irish Free State |
| Occupation | Farmer |
| Industry | General Farm |
| Class of Worker | VVVV |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
1940
Wadena-County, Minnesota
Head, age 70
Wadena-County, Minnesota · implied b. ~1870 — 7 household members
| Surname | Callahan |
| Given Name | Thomas H. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 70 |
| Marital Status | Married |
| Birthplace | Minnesota |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Wadena |
| Class of Worker | 0 |
| Hours Worked | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Minnesota |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
Model Tree
An inferred pedigree reconstructed from census links — up to 4 generations within the 1900–1950 window. Closer generations are built from household co-residence; deeper ones are bridged by following a relative to their own childhood census. Confidence compounds and weakens with each generation.
Our Model Tree links Thomas Callahan across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Thomas Callahan
Head · 1940 · age 70 · b. ~1870 · Minnesota
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Wadena-County, Minnesota
Open full size
1940 US Federal Census — Wadena-County, Minnesota
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01966-00265)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | George A. Suddenberg | 20 | Son | — | Minnesota |
| 42 | Bernice Kunnary | 22 | Lodger | Stenographer | Minnesota |
| 43 | Fred C. King | 57 | Head | Operator And Owner Of Dragline | Minnesota |
| 44 | Lillian S. King | 52 | Wife | — | Minnesota |
| 45 | Robert A. King | 24 | Son | Helper - Dragline | Minnesota |
| 46 | Marion Maher | 29 | Lodger | Teacher | Minnesota |
| 47 | Ellen Hatt | 21 | Lodger | Teacher | North Dakota |
| 48 | Marguerite Trueblood | 20 | Lodger | Teacher | North Dakota |
| 49 | Dr. Howard Borland | 33 | Head | Medical Doctor | South Dakota |
| 50 | Thelma Borland | 33 | Wife | — | Minnesota |
| 51 | Jon Borland | 2 | Son | — | Minnesota |
| 52 | Helen Engels | 19 | Maid | Maid | Minnesota |
| 53 | Thomas H. Callahan THIS PERSON | 70 | Head | — | Minnesota |
| 54 | Anne Callahan | 63 | Wife | — | Minnesota |
| 55 | Louie Callahan | 35 | Son | Truck-Driver | Minnesota |
| 56 | Gregor Callahan | 32 | Son | Truck-Driver | Minnesota |
| 57 | Emmet Callahan | 30 | Son | Bartender | Minnesota |
| 58 | Francis Callahan | 24 | Son | — | Minnesota |
| 59 | Muriel Callahan | 18 | Daughter | — | Minnesota |
| 60 | Clayton Kopp | 29 | Head | — | Minnesota |
| 61 | Jennie R. Kopp | 30 | Wife | — | Minnesota |
| 62 | Wayne Kopp | 9 | Son | — | Minnesota |
| 63 | Claire Kopp | 7 | Daughter | — | Minnesota |
| 64 | John S. Omenson | 61 | Head | Laborer | Norway |
| 65 | Josephine S. Omenson | 52 | Wife | — | Illinois |
| 66 | Donald Omenson | 16 | Son | — | Minnesota |
| 67 | Keith Omenson | 11 | Son | — | Minnesota |
| 68 | Johanna Breland | 71 | Mother-in-law | — | Norway |
| 69 | John O. Sjobeck | 54 | Head | Shoemaker | Sweden |
| 70 | Mimie Sjobeck | 50 | Wife | Cook | Minnesota |
| 71 | Verona Sjobeck | 16 | Daughter | — | Minnesota |
| 72 | Lillian Sjobeck | 15 | Daughter | — | Minnesota |
| 73 | Hugo Sjobeck | 13 | Son | — | Minnesota |
| 74 | John Jr. Sjobeck | 10 | Son | — | Minnesota |
| 75 | Norman Sjobeck | 8 | Son | — | Minnesota |
| 76 | Vern S. Lepper | 50 | Head | Farmer | Minnesota |
| 77 | Oline Lepper | 41 | Wife | — | Iowa |
| 78 | Vergh Lepper | 19 | Son | — | Minnesota |
| 79 | Floyd Lepper | 15 | Son | — | Minnesota |
| 80 | Elvin Lepper | 12 | Son | — | Minnesota |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1940 United States Federal Census (NARA). Our Model Tree links this person across census decades using XGBoost-based record linkage, with per-link confidence scores. Household corroboration strengthens the signal when co-residents appear on the same census pages in multiple years.
Source: National Archives and Records Administration (NARA)