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William Brennan — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Macoupin-County, Illinois
Our Model Tree links this William Brennan across the 1920, 1930 and 1940 US Censuses in Macoupin-County, Illinois (XGBoost, ~Confirmed) — first a head (b.~1886), then head of a 3-person household.
Age 54
b. ~1886
Male
Head
Born: Missouri
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Macoupin-County, Illinois |
| Surname | Brennan |
| Given Name | William |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 54 |
| Marital Status | Married |
| Birthplace | Missouri |
| 1935 Residence (City) | Staunton City |
| 1935 Residence (County) | Macoupin |
| Additional Details | |
| Occupation | Miner |
| Industry | Coal Mine |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 800 |
| Highest Grade | No 6 |
| 1935 Residence | Same house |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
| Occupation | Miner |
| Township / Ward | Staunton City |
| Est. Birth Year | ~1886 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| William Brennan | Head | — | 54 | ~1886 |
| Mary Brennan | Spouse | — | 55 | ~1885 |
| Virginia Brennan | Daughter | — | 18 | ~1922 |
Census Appearances
1920
Macoupin, Illinois
Head, age 34
Macoupin, Illinois · implied b. ~1886 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Brennan |
| Given Name | William |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 34 |
| Marital Status | Married |
| Birthplace | Missouri |
| Father's Birthplace | Missouri |
| Mother's Birthplace | Missouri |
| Occupation | Miner |
| Industry | Coal mine |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Missouri |
| Birth Country | United States |
| Year of Naturalization | R |
| Birthplace (normalized) | missouri |
1930
Macoupin, Illinois
Head, age 44
Macoupin, Illinois · implied b. ~1886 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Brennan |
| Given Name | William |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 44 |
| Marital Status | Married |
| Birthplace | Missouri |
| Age at First Marriage | 29 |
| Father's Birthplace | Unknown |
| Mother's Birthplace | Missouri |
| Occupation | Miner |
| Industry | Coal mine |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Home Value / Rent | 1500 |
| Veteran | No |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
1940
Macoupin-County, Illinois
Head, age 54
Macoupin-County, Illinois · implied b. ~1886 — 3 household members
| Surname | Brennan |
| Given Name | William |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 54 |
| Marital Status | Married |
| Birthplace | Missouri |
| 1935 Residence (City) | Staunton City |
| 1935 Residence (County) | Macoupin |
| Occupation | Miner |
| Industry | Coal Mine |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 800 |
| Highest Grade | No 6 |
| 1935 Residence | Same house |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
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 Brennan across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
William Brennan
Head · 1940 · age 54 · b. ~1886 · Illinois
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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 — Macoupin-County, Illinois
Open full size
1940 US Federal Census — Macoupin-County, Illinois
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-00847-00411)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Ann Boaner | 26 | Wife | — | Illinois |
| 42 | Walter Boaner | 4 | Son | — | Illinois |
| 44 | Charles Ollak | 40 | Head | Miner | Illinois |
| 45 | Delia Ollak | 30 | Wife | — | Illinois |
| 46 | Gertrude Bunn | 88 | Head | — | Germany |
| 47 | William Brennan THIS PERSON | 54 | Head | Miner | Missouri |
| 48 | Mary Brennan | 55 | Wife | — | Illinois |
| 49 | Virginia Brennan | 18 | Daughter | — | Illinois |
| 50 | Guy A Huff | 61 | Head | Laborer | Illinois |
| 51 | Myrtle Huff | 58 | Wife | — | Illinois |
| 52 | Barbara Huff | 20 | Daughter | Seamstress | Illinois |
| 53 | Guy Jr Huff | 16 | Son | New Worker | Illinois |
| 54 | Mabel Huff | 58 | Head | Servant | Illinois |
| 55 | John Foke | 29 | Head | Pipefitter | Illinois |
| 56 | Augusta Foke | 25 | Wife | — | Illinois |
| 57 | William Foke | 3 | Son | — | Illinois |
| 58 | Willard Jackson | 35 | Head | Electric Welder | Illinois |
| 59 | Irene Jackson | 36 | Wife | — | Illinois |
| 60 | Willard Jackson | 9 | Son | — | Illinois |
| 61 | Leta Jackson | 3 | Daughter | — | Missouri |
| 62 | Joseph Mlekoosh | 44 | Head | Miner | Germany |
| 63 | Lena Mlekoosh | 30 | Wife | — | Germany |
| 64 | Harrison Sawyer | 51 | Head | — | Illinois |
| 65 | Manda Sawyer | 47 | Wife | Servant | Illinois |
| 66 | Deloris Sawyer | 15 | Daughter | — | Illinois |
| 67 | Opal Sawyer | 12 | Daughter | — | Illinois |
| 68 | Maude Sawyer | 9 | Daughter | — | Illinois |
| 69 | Lee Sawyer | 5 | Son | — | Illinois |
| 70 | J. G. Swank | 80 | Lodger | — | Ohio |
| 71 | George Benjamin | 56 | Head | Miner | Yugo Slavia |
| 72 | Helen Benjamin | 46 | Wife | — | Yugo Slavia |
| 73 | Emil Benjamin | 17 | Son | New Worker | Illinois |
| 74 | Helen Benjamin | 15 | Daughter | — | Illinois |
| 75 | Jack Benjamin | 13 | Son | — | Illinois |
| 76 | Jimmy Benjamin | 11 | Son | — | Illinois |
| 77 | Edward Huff | 40 | Head | Trucker | Illinois |
| 78 | Cordelia Huff | 35 | Wife | — | Illinois |
| 79 | John Huff | 13 | Son | — | Michigan |
| 80 | Anne Huff | 11 | Daughter | — | Illinois |
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)