MJ
Mary Jacobs — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Peoria-County, Illinois
Our Model Tree links this Mary Jacobs across the 1920, 1930 and 1940 US Censuses in Peoria-County, Illinois (XGBoost, ~Confirmed) — first a spouse (b.~1880), then head of a 3-person household.
Age 60
b. ~1880
Female
Spouse
Born: Illinois
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Peoria-County, Illinois |
| Surname | Jacobs |
| Given Name | Mary E. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 60 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Peoria City |
| 1935 Residence (County) | Peoria |
| Additional Details | |
| Industry | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Peoria City |
| Est. Birth Year | ~1880 |
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 Mary | Age | Birth yr |
|---|---|---|---|---|
| Marion Jacobs | Daughter | — | 26 | ~1914 |
| James Jacobs | Head | — | 65 | ~1875 |
| Mary Jacobs | Spouse | — | 60 | ~1880 |
Census Appearances
1920
Peoria, Illinois
Spouse, age 40
Peoria, Illinois · implied b. ~1880 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Jacobus |
| Given Name | Mary E |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 40 |
| Marital Status | Married |
| Birthplace | Illinois |
| Father's Birthplace | New York |
| Mother's Birthplace | Illinois |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Peoria, Illinois
Spouse, age 50
Peoria, Illinois · implied b. ~1880 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Jacobus |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 50 |
| Marital Status | Married |
| Birthplace | Illinois |
| Age at First Marriage | 19 |
| Father's Birthplace | New York |
| Mother's Birthplace | Illinois |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Peoria-County, Illinois
Spouse, age 60
Peoria-County, Illinois · implied b. ~1880 — 3 household members
| Surname | Jacobs |
| Given Name | Mary E. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 60 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Peoria City |
| 1935 Residence (County) | Peoria |
| Industry | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| 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 Mary Jacobs across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Jacobs
Spouse · 1940 · age 60 · b. ~1880 · Illinois
★ 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 — Peoria-County, Illinois
Open full size
1940 US Federal Census — Peoria-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00917-00272)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Kathryn Kufe | 45 | — | — | Illinois |
| 42 | Mercedes Black Kufe | 22 | — | — | Illinois |
| 43 | Ray Whitaker | 28 | Head | Hydraulic Press Operator | Illinois |
| 44 | Leda V. Whitaker | 29 | Wife | — | Illinois |
| 45 | Sara Whitaker | 6 | Daughter | — | Illinois |
| 46 | Juanita Whitaker | 4 | Daughter | — | Illinois |
| 47 | Howard Allen | 27 | Father | Core Assembler | Wisconsin |
| 48 | Martha Brassfield | 25 | Mother | Reg. Nurse | Illinois |
| 49 | John W. Nader | 40 | Head | Proprietor | Michigan |
| 50 | Helen W. Nader | 38 | Wife | — | Illinois |
| 51 | John W. Nader | 4 | Son | — | Illinois |
| 52 | Fred W. Higginson | 48 | Head | Foreman | Illinois |
| 53 | Emma S. Higginson | 42 | Wife | — | Illinois |
| 54 | Winifred Higginson | 17 | Daughter | — | Illinois |
| 55 | Henry J. Biegle | 55 | Head | Proprietor | Illinois |
| 56 | Augusta V. Biegle | 54 | Wife | — | Germany |
| 57 | Russell Biegle | 26 | Son | Gen'L Office Work | Illinois |
| 58 | Joseph Stingl | 55 | Head | Supt. | Illinois |
| 59 | Teresa C. Stingl | 54 | Wife | — | Illinois |
| 60 | George Stingl | 22 | Son | Clerk | Illinois |
| 61 | Robert M. Paul | 54 | Head | Salesman | Illinois |
| 62 | Leatha V. Paul | 49 | Wife | — | Illinois |
| 63 | Audrey N. Nielsen | 23 | Daughter | Bookkeeper | Illinois |
| 64 | Elmer R. Mosburg | 51 | Head | Proprietor | Oregon |
| 65 | Alice V. Mosburg | 54 | Wife | Clerk | Illinois |
| 66 | Carl G. Taylor | 64 | Head | Stationary Eng. | Missouri |
| 67 | Myra M. Taylor | 51 | Wife | Teacher | Illinois |
| 68 | James Jacobs | 65 | Head | Foreman | Illinois |
| 69 | Mary E. Jacobs THIS PERSON | 60 | Wife | — | Illinois |
| 70 | Marion Jacobs | 26 | Daughter | — | Illinois |
| 71 | Jennie Thayer | 86 | Head | — | Illinois |
| 72 | Lena Mcgary | 61 | Servant | Housekeeper | Illinois |
| 73 | George Vick | 80 | Head | Proprietor | Ohio |
| 74 | Herbert Vick | 52 | Son | Clerk | Illinois |
| 75 | Roy Vick | 51 | Son | Machinist | Ohio |
| 76 | Minna Hendrickson | 54 | Servant | Housework | Sweden |
| 77 | Joseph E. Mcconnell | 53 | Head | Brick Mason | Illinois |
| 78 | Alice E. Mcconnell | 51 | Wife | — | California |
| 79 | Thomas Hoskins | 24 | Head | Sales Engineer | Utah |
| 80 | Ruth Hoskins | 25 | Wife | — | Utah |
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)