JC
John Cahill — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Swift-County, Minnesota
Our Model Tree links this John Cahill across the 1930 and 1940 US Censuses in Swift-County, Minnesota (XGBoost, ~Confirmed) — first a head (b.~1898), then head of a 7-person household.
Age 42
b. ~1898
Male
Head
Born: Minnesota
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Swift-County, Minnesota |
| Surname | Cahill |
| Given Name | John R |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 42 |
| Marital Status | Married |
| Birthplace | Minnesota |
| 1935 Residence (City) | Marysland township |
| 1935 Residence (County) | Swift |
| Additional Details | |
| Occupation | Shoveler |
| Industry | Road Construction |
| Class of Worker | PW |
| Hours Worked | 84 |
| Income (1939) | 475 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
| Occupation | Shoveler |
| Township / Ward | Marysland Township |
| Est. Birth Year | ~1898 |
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 John | Age | Birth yr |
|---|---|---|---|---|
| Charles Cahill | Son | — | 7 | ~1933 |
| Janice Cahill | Daughter | — | 3 | ~1937 |
| Angela Cahill | Daughter | — | 1 | ~1939 |
| Elizabeth Cahill | Daughter | — | 9 | ~1931 |
| Margaret Cahill | Daughter | — | 4 | ~1936 |
| John Cahill | Head | — | 42 | ~1898 |
| Aileen Cahill | Spouse | — | 30 | ~1910 |
Census Appearances
1930
Swift, Minnesota
Head, age 32
Swift, Minnesota · implied b. ~1898 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cahill |
| Given Name | John T |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 32 |
| Marital Status | Married |
| Birthplace | Minnesota |
| Age at First Marriage | 32 |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Wisconsin |
| Occupation | Farmer |
| Industry | General Farm |
| Class of Worker | OA |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
1940
Swift-County, Minnesota
Head, age 42
Swift-County, Minnesota · implied b. ~1898 — 7 household members
| Surname | Cahill |
| Given Name | John R |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 42 |
| Marital Status | Married |
| Birthplace | Minnesota |
| 1935 Residence (City) | Marysland township |
| 1935 Residence (County) | Swift |
| Occupation | Shoveler |
| Industry | Road Construction |
| Class of Worker | PW |
| Hours Worked | 84 |
| Income (1939) | 475 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| 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 John Cahill across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Cahill
Head · 1940 · age 42 · b. ~1898 · Minnesota
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Swift-County, Minnesota
Open full size
1940 US Federal Census — Swift-County, Minnesota
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01963-00341)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Margaret Chevalier | 10 | Daughter | — | Minnesota |
| 2 | Lucille Chevalier | 8 | Daughter | — | Minnesota |
| 3 | John R Cahill THIS PERSON | 42 | Head | Shoveler | Minnesota |
| 4 | Aileen Cahill | 30 | Wife | — | Iowa |
| 5 | Elizabeth Cahill | 9 | Daughter | — | Minnesota |
| 6 | Charles Cahill | 7 | Son | — | Minnesota |
| 7 | Margaret Cahill | 4 | Daughter | — | Minnesota |
| 8 | Janice Cahill | 3 | Daughter | — | Minnesota |
| 9 | Angela Cahill | 1 | Daughter | — | Minnesota |
| 10 | William S Lowrie | 71 | Head | — | Ohio |
| 11 | Conrad R Gange | 51 | Partner | — | Minnesota |
| 12 | Alvin E Brandt | 35 | Head | Farmer | Minnesota |
| 13 | Hilda Brandt | 31 | Wife | — | Minnesota |
| 14 | Vera Brandt | 4 | Daughter | — | Minnesota |
| 15 | Fred Brandt | 75 | Father | — | Pennsylvania |
| 16 | Raymond D Hoffman | 27 | Head | Farmer | Minnesota |
| 17 | Isabel Hoffman | 25 | Wife | — | Minnesota |
| 18 | Gwendolyn Hoffman | 3 | Daughter | — | Minnesota |
| 19 | Kenneth L Hoffman | 0 | Son | — | Minnesota |
| 20 | John Mcdeary | 36 | Head | Farmer | Minnesota |
| 21 | Susan E Mcdeary | 32 | Wife | — | Minnesota |
| 22 | Margaret Mcdeary | 4 | Daughter | — | Minnesota |
| 23 | James Mcdeary | 2 | Son | — | Minnesota |
| 24 | John V Mcdeary | 0 | Son | — | Minnesota |
| 25 | Leonard J Hargraves | 30 | Lodger | Farm Labour | Minnesota |
| 26 | Henry G Driessen | 46 | Head | Farmer | South Dakota |
| 27 | Laura Driessen | 47 | Wife | — | Iowa |
| 28 | Ernest H Tabbe | 49 | Brother | Farmer | Iowa |
| 29 | Thomas Hough | 76 | Father in law | — | Iowa |
| 30 | Ernest J Archer | 17 | Lodger | Farm Labour | South Dakota |
| 31 | Charles G Brandt | 22 | Head | Farmer | Minnesota |
| 32 | Bertha Brandt | 43 | Mother | — | Minnesota |
| 33 | Herman S Kramer | 40 | Head | Farmer | Minnesota |
| 34 | Nora E Kramer | 38 | Wife | — | Minnesota |
| 35 | Leonard Kramer | 14 | Son | — | Minnesota |
| 36 | Lorraine Kramer | 12 | Daughter | — | Minnesota |
| 37 | William Whitney | 69 | Lodger | — | New York |
| 38 | Lester Cunningham | 35 | Lodger | Farm Labour | Indiana |
| 39 | Patrick Mcdeary | 66 | Head | Farm Labour | Wisconsin |
| 40 | Mary Mcdeary | 60 | Wife | — | 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)