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Thomas Callahan — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Atchison-County, Kansas
Our Model Tree links this Thomas Callahan across the 1930 and 1940 US Censuses in Atchison-County, Kansas (XGBoost, ~Confirmed) — first a son (b.~1926), then head of a 7-person household.
Age 14
b. ~1926
Male
Son
Born: Kansas
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Atchison-County, Kansas |
| Surname | Callahan |
| Given Name | Thomas E. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Kansas |
| 1935 Residence (City) | Lancaster Township |
| 1935 Residence (County) | Atchison |
| Additional Details | |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Kansas |
| Birth Country | United States |
| Birthplace (normalized) | kansas |
| Township / Ward | Lancaster Township |
| Est. Birth Year | ~1926 |
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 |
|---|---|---|---|---|
| Patty Callahan | Daughter | — | 3 | ~1937 |
| Alice Callahan | Daughter | — | 12 | ~1928 |
| Mary Callahan | Daughter | — | 16 | ~1924 |
| Thomas Callahan | Son | — | 14 | ~1926 |
| Della Callahan | Spouse | — | 34 | ~1906 |
| James Callahan | Head | — | 42 | ~1898 |
| Margaret Callahan | Daughter | — | 10 | ~1930 |
Census Appearances
1930
Atchison, Kansas
Son, age 3
Atchison, Kansas · implied b. ~1927 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Callahan |
| Given Name | Thomas E |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | Kansas |
| Father's Birthplace | Kansas |
| Mother's Birthplace | Kansas |
| Birth State | Kansas |
| Birth Country | United States |
| Birthplace (normalized) | kansas |
1940
Atchison-County, Kansas
Son, age 14
Atchison-County, Kansas · implied b. ~1926 — 7 household members
| Surname | Callahan |
| Given Name | Thomas E. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Kansas |
| 1935 Residence (City) | Lancaster Township |
| 1935 Residence (County) | Atchison |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Kansas |
| Birth Country | United States |
| Birthplace (normalized) | kansas |
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
Son · 1940 · age 14 · b. ~1926 · Kansas
★ You are viewing this record
Sibling
Alice Callahan
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Callahan
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Patty Callahan
Sibling · 1940 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Callahan
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Atchison-County, Kansas
Open full size
1940 US Federal Census — Atchison-County, Kansas
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01219-00521)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Gilbert Scholz | 30 | Son | Farmer | Kansas |
| 42 | Karl Scholz | 20 | Son | Farmer | Kansas |
| 43 | Anna Scholz | 24 | Daughter | — | Kansas |
| 44 | Pauline Scholz | 17 | Daughter | — | Kansas |
| 45 | James B. Callahan | 42 | Head | Laborer | Kansas |
| 46 | Della Callahan | 34 | Wife | — | Kansas |
| 47 | Mary Ann Callahan | 16 | Daughter | — | Kansas |
| 48 | Thomas E. Callahan THIS PERSON | 14 | Son | — | Kansas |
| 49 | Alice May Callahan | 12 | Daughter | — | Kansas |
| 50 | Margaret E. Callahan | 10 | Daughter | — | Kansas |
| 51 | Patty Lou Callahan | 3 | Daughter | — | Kansas |
| 52 | Fred A. Koeppe | 46 | Head | Farmer | Kansas |
| 53 | Edna Koeppe | 44 | Wife | — | Kansas |
| 54 | Robert Koeppe | 17 | Son | — | Kansas |
| 55 | Dean Koeppe | 11 | Son | — | Kansas |
| 56 | Fred B. Buddenbohm | 51 | Head | Farmer | Germany |
| 57 | Edna Buddenbohm | 44 | Wife | — | Kansas |
| 58 | Irene Buddenbohm | 14 | Daughter | — | Kansas |
| 59 | Lola May Buddenbohm | 11 | Daughter | — | Kansas |
| 60 | Forrest Hood | 38 | Head | Farmer | Kansas |
| 61 | Lula Hood | 37 | Wife | — | Kansas |
| 62 | Marian Hood | 16 | Daughter | — | Kansas |
| 63 | Arnold B. Carr | 38 | Head | Farmer | Kansas |
| 64 | Esther Carr | 37 | Wife | — | Kansas |
| 65 | Elvyn Carr | 12 | Son | — | Kansas |
| 66 | Christ B. Thekking | 62 | Head | Farmer | Germany |
| 67 | Gilbert B. Thekking | 34 | Head | Farmer | Kansas |
| 68 | Elsie Thekking | 30 | Wife | — | Kansas |
| 69 | Grace Ann Thekking | 4 | Daughter | — | Kansas |
| 70 | Eldon Ray Thekking | 2 | Son | — | Kansas |
| 71 | William B. Morley | 61 | Head | — | Kansas |
| 72 | Lena Morley | 55 | Wife | — | Missouri |
| 73 | James White | 22 | Lodger | Laborer | Kansas |
| 74 | Albert B. Scholz | 26 | Head | Laborer | Kansas |
| 75 | Agnes Scholz | 25 | Wife | — | Kansas |
| 76 | Ward B. Carr | 28 | Head | Farmer | Kansas |
| 77 | Hazel Carr | 23 | Wife | — | Nebraska |
| 78 | Charles B. Harden | 38 | Head | Farmer | Kansas |
| 79 | Violet Harden | 20 | Wife | — | Kansas |
| 80 | Beulah M. Harden | 0 | Daughter | — | Kansas |
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)