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William Callahan — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Freeborn-County, Minnesota
Our Model Tree links this William Callahan across the 1930 and 1940 US Censuses in Freeborn-County, Minnesota (XGBoost, ~Confirmed) — first a son (b.~1924), then head of a 8-person household.
Age 16
b. ~1924
Male
Son
Born: Minnesota
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Freeborn-County, Minnesota |
| Surname | Callahan |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Minnesota |
| 1935 Residence (City) | Freeborn Twp |
| 1935 Residence (County) | Freeborn |
| Additional Details | |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | NP |
| Hours Worked | 40 |
| Highest Grade | Hs 2 |
| 1935 Residence | Same House |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
| Occupation | Farmer |
| Township / Ward | Freeborn Twp |
| Est. Birth Year | ~1924 |
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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| Dorothy Callahan | Daughter | — | 20 | ~1920 |
| Nanna Callahan | Daughter | — | 12 | ~1928 |
| Hulda Callahan | Spouse | — | 57 | ~1883 |
| Robert Callahan | Son | — | 14 | ~1926 |
| Velma Callahan | Daughter | — | 18 | ~1922 |
| Thomas Callahan | Head | — | 63 | ~1877 |
| Betty Callahan | Daughter | — | 16 | ~1924 |
| William Callahan | Son | — | 16 | ~1924 |
Census Appearances
1930
Freeborn, Minnesota
Son, age 6
Freeborn, Minnesota · implied b. ~1924 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Callahan |
| Given Name | William J |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 6 |
| Marital Status | Single |
| Birthplace | Minnesota |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Wisconsin |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
1940
Freeborn-County, Minnesota
Son, age 16
Freeborn-County, Minnesota · implied b. ~1924 — 8 household members
| Surname | Callahan |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Minnesota |
| 1935 Residence (City) | Freeborn Twp |
| 1935 Residence (County) | Freeborn |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | NP |
| Hours Worked | 40 |
| Highest Grade | Hs 2 |
| 1935 Residence | Same House |
| 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 William Callahan across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
William Callahan
Son · 1940 · age 16 · b. ~1924 · Minnesota
★ You are viewing this record
Sibling
Nanna Callahan
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Callahan
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Betty Callahan
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Dorothy Callahan
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Velma Callahan
Sibling · 1940 · age 18
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 — Freeborn-County, Minnesota
Open full size
1940 US Federal Census — Freeborn-County, Minnesota
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01922-00576)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | A W Ayars | 63 | Head | Farmer | Minnesota |
| 2 | Lill Ayars | 61 | Head | Farmer | Minnesota |
| 3 | H G Beneke | 43 | Head | Farmer | Iowa |
| 4 | Rena Beneke | 42 | Wife | — | Iowa |
| 5 | Isadhel Beneke | 18 | Daughter | — | Minnesota |
| 6 | Kermit Culbertson | 17 | Roomer | — | Minnesota |
| 7 | Sidney Borge | 27 | Head | Farmer | Minnesota |
| 8 | Evelyn Borge | 21 | Wife | — | Iowa |
| 9 | John Pygick | 70 | Head | — | Poland |
| 10 | John L Pygick | 40 | Son | Farmer | Minnesota |
| 11 | Julia Pygick | 30 | Daughter in law | — | Illinois |
| 12 | Charles Pygick | 9 | Grandson | — | Minnesota |
| 13 | Sylvia Pygick | 7 | Granddaughter | — | Minnesota |
| 14 | Rita Pygick | 5 | Granddaughter | — | Minnesota |
| 15 | Louis Cygmar | 71 | Son in law | — | Poland |
| 16 | Victoria Cygmar | 48 | Daughter | — | Poland |
| 17 | Philip Bushlack | 28 | Head | Farmer | Minnesota |
| 18 | Marcelle Bushlack | 21 | Wife | — | Minnesota |
| 19 | Joseph Hass | 55 | Head | — | Minnesota |
| 20 | William Hass | 31 | Son | Farmer | Minnesota |
| 21 | Bertha Hass | 25 | Daughter in law | — | Minnesota |
| 22 | Phylis Hass | 18 | Daughter | — | Minnesota |
| 23 | Dorothy Hass | 14 | Daughter | — | Minnesota |
| 24 | Gerald Hass | 13 | Son | — | Minnesota |
| 25 | Donald Hass | 7 | Grandson | — | Minnesota |
| 26 | Russell Hass | 5 | Grandson | — | Minnesota |
| 27 | Lorrain Hass | 3 | Granddaughter | — | Minnesota |
| 28 | Dale Hass | 2 | Grandson | — | Minnesota |
| 29 | Thomas F Callahan | 63 | Head | Farmer | Wisconsin |
| 30 | Hulda Callahan | 57 | Wife | — | Iowa |
| 31 | Dorothy Callahan | 20 | Daughter | — | Iowa |
| 32 | Velma Callahan | 18 | Daughter | House Work | Minnesota |
| 33 | William Callahan THIS PERSON | 16 | Son | Farmer | Minnesota |
| 34 | Betty Callahan | 16 | Daughter | — | Minnesota |
| 35 | Robert Callahan | 14 | Son | — | Minnesota |
| 36 | Nanna Callahan | 12 | Daughter | — | Minnesota |
| 37 | Walter Agvoke | 26 | Head | Farmer | Minnesota |
| 38 | Nelda Agvoke | 22 | Wife | — | Minnesota |
| 39 | Walter Agvoke | 3 | Son | — | Minnesota |
| 40 | Carol Agvoke | 1 | Daughter | — | Minnesota |
Related Census Records
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)