IB
Ira Brown — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Mercer-County, Illinois
Our Model Tree links this Ira Brown across the 1920, 1930 and 1940 US Censuses in Mercer-County, Illinois (XGBoost, ~Confirmed) — first a head (b.~1867), then head of a 3-person household.
Age 73
b. ~1867
Male
Head
Born: Illinois
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Mercer-County, Illinois |
| Surname | Brown |
| Given Name | Ira M |
| Relationship to Head | head |
| Sex | M |
| Color / Race | White |
| Age | 73 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Ohio Grove Township |
| 1935 Residence (County) | Mercer |
| Additional Details | |
| Class of Worker | 0 |
| Highest Grade | G 8 |
| 1935 Residence | Same house |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Ohio Grove Township |
| Est. Birth Year | ~1867 |
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 Ira | Age | Birth yr |
|---|---|---|---|---|
| Darrah Brown | Son | — | 16 | ~1924 |
| Sarah Brown | Spouse | — | 64 | ~1876 |
| Ira Brown | Head | — | 73 | ~1867 |
Census Appearances
1920
Mercer, Illinois
Head, age 53
Mercer, Illinois · implied b. ~1867 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Brown |
| Given Name | Ira M |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 53 |
| Marital Status | Married |
| Birthplace | Illinois |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Illinois |
| Occupation | Farmer |
| Industry | General farm |
| Class of Worker | M |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Home Owned/Rented | O |
| Home Free/Mortgaged | F |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Mercer, Illinois
Head, age 63
Mercer, Illinois · implied b. ~1867 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Brown |
| Given Name | Ira M |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 63 |
| Marital Status | Married |
| Birthplace | Illinois |
| Age at First Marriage | 22 |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Illinois |
| Occupation | none |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Home Value / Rent | 4000 |
| Veteran | No |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Mercer-County, Illinois
Head, age 73
Mercer-County, Illinois · implied b. ~1867 — 3 household members
| Surname | Brown |
| Given Name | Ira M |
| Relationship to Head | head |
| Sex | M |
| Color / Race | White |
| Age | 73 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Ohio Grove Township |
| 1935 Residence (County) | Mercer |
| Class of Worker | 0 |
| Highest Grade | G 8 |
| 1935 Residence | Same house |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
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 Ira Brown across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Ira Brown
Head · 1940 · age 73 · b. ~1867 · 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 — Mercer-County, Illinois
Open full size
1940 US Federal Census — Mercer-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00858-00394)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Cecil R Mccaw | 37 | son | Worker For Mother | Illinois |
| 2 | Leonard Mccaw | 13 | grandson | — | Illinois |
| 3 | Dale Mccaw | 32 | head | Farmer | Illinois |
| 4 | Lillian Mccaw | 32 | wife | — | Iowa |
| 5 | Alden Mccaw | 9 | son | — | Illinois |
| 6 | Janet Mccaw | 2 | daughter | — | Illinois |
| 7 | Klein Swearingen | 33 | head | Farmer | Illinois |
| 8 | Wilma Swearingen | 28 | wife | — | Illinois |
| 9 | Vernon Swearingen | 8 | son | — | Illinois |
| 10 | Janet Swearingen | 6 | daughter | — | Illinois |
| 11 | Shirley Swearingen | 3 | daughter | — | Illinois |
| 12 | Sandra Swearingen | 1 | daughter | — | Illinois |
| 13 | Martin Durward | 34 | hired man | Farmer | Illinois |
| 14 | Ira M Brown THIS PERSON | 73 | head | — | Illinois |
| 15 | Sarah E Brown | 64 | wife | — | Illinois |
| 16 | Darrah Brown | 16 | son | — | Illinois |
| 17 | Ernest Mccaw | 46 | head | Farmer | Illinois |
| 18 | Nettie Mccaw | 43 | wife | — | Illinois |
| 19 | Jean Mccaw | 10 | daughter | — | Illinois |
| 20 | Joyce Mccaw | 6 | daughter | — | Illinois |
| 21 | J. S. Epperly | 56 | head | Farmer | Illinois |
| 22 | Myrtle Epperly | 50 | wife | — | Illinois |
| 23 | Doris Epperly | 21 | daughter | — | Illinois |
| 24 | Wayne Kennedy | 31 | hired man | Farmer | Illinois |
| 25 | Leo W Johnson | 34 | head | Farmer | Illinois |
| 26 | Vivian Johnson | 31 | wife | — | Illinois |
| 27 | Vernon Johnson | 13 | son | — | Illinois |
| 28 | James Braucht | 63 | head | Farmer | Illinois |
| 29 | Grace Braucht | 59 | wife | — | Illinois |
| 30 | Charles Johnson | 66 | head | Farmer | Sweden |
| 31 | Jennie Johnson | 60 | wife | — | Illinois |
| 32 | Arthur Johnson | 37 | son | Farmer | Illinois |
| 33 | Arthur Johnson | 20 | hired man | Farmer | Illinois |
| 34 | Fred Mccreight | 50 | head | Farmer | Illinois |
| 35 | Edna Mccreight | 47 | wife | — | Illinois |
| 36 | Dolores Mccreight | 17 | daughter | — | Illinois |
| 37 | Donald Mccreight | 15 | son | Farmer | Illinois |
| 38 | Larry Mccreight | 6 | son | — | Illinois |
| 39 | Frank Decker | 37 | head | Farmer | Illinois |
| 40 | Margaret E Decker | 26 | wife | — | 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)