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Robert Jacobs — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Bay-County, Michigan
Our Model Tree links this Robert Jacobs across the 1930 and 1940 US Censuses in Bay-County, Michigan (XGBoost, ~Confirmed) — first a son (b.~1930), then head of a 12-person household.
Age 10
b. ~1930
Male
Son
Born: Michigan
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Bay-County, Michigan |
| Surname | Jacobs |
| Given Name | Robert W. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Michigan |
| 1935 Residence (City) | Hampton Township |
| 1935 Residence (County) | Bay |
| Additional Details | |
| Highest Grade | 3 |
| 1935 Residence | Same House |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
| Township / Ward | Hampton Township |
| Est. Birth Year | ~1930 |
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.
12 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Robert | Age | Birth yr |
|---|---|---|---|---|
| Mary Jacobs | Daughter | — | 21 | ~1919 |
| Louis Jacobs | Son | — | 26 | ~1914 |
| Cornelia Jacobs | Spouse | — | 47 | ~1893 |
| Howard Jacobs | Son | — | 16 | ~1924 |
| Robert Jacobs | Son | — | 10 | ~1930 |
| Margaret Jacobs | Daughter | — | 23 | ~1917 |
| Peter Jacobs | Head | — | 53 | ~1887 |
| Leona Jacobs | Daughter | — | 19 | ~1921 |
| Walter Jacobs | Son | — | 22 | ~1918 |
| Marie Jacobs | Daughter | — | 25 | ~1915 |
| Ambrose Jacobs | Son | — | 6 | ~1934 |
| Elizabeth Jacobs | Daughter | — | 12 | ~1928 |
Census Appearances
1930
Bay, Michigan
Son, age 1
Bay, Michigan · implied b. ~1929 — 11 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Jacobs |
| Given Name | Robert W. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Michigan |
| Father's Birthplace | Michigan |
| Mother's Birthplace | Michigan |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
1940
Bay-County, Michigan
Son, age 10
Bay-County, Michigan · implied b. ~1930 — 12 household members
| Surname | Jacobs |
| Given Name | Robert W. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Michigan |
| 1935 Residence (City) | Hampton Township |
| 1935 Residence (County) | Bay |
| Highest Grade | 3 |
| 1935 Residence | Same House |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
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 Robert Jacobs across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Robert Jacobs
Son · 1940 · age 10 · b. ~1930 · Michigan
★ You are viewing this record
Sibling
Marie Jacobs
Sibling · 1940 · age 25
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Leona Jacobs
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Howard Jacobs
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Jacobs
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Jacobs
Sibling · 1940 · age 23
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ambrose Jacobs
Sibling · 1940 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Louis Jacobs
Sibling · 1940 · age 26
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Walter Jacobs
Sibling · 1940 · age 22
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Elizabeth Jacobs
Sibling · 1940 · age 12
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 — Bay-County, Michigan
Open full size
1940 US Federal Census — Bay-County, Michigan
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01729-00226)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Fred Lewis | 41 | Head | Foreman | Michigan |
| 2 | Mary Lewis | 43 | Wife | — | Michigan |
| 3 | Barbara Lewis | 4 | Daughter | — | Michigan |
| 4 | Richard Lewis | 1 | Son | — | Michigan |
| 5 | Elmer Poirier | 30 | Head | Machine Operator | Michigan |
| 6 | Eugenie Poirier | 28 | Wife | — | Michigan |
| 7 | Eugene Poirier | 6 | Son | — | Michigan |
| 8 | James Poirier | 5 | Son | — | Michigan |
| 9 | Jerry Poirier | 1 | Son | — | Michigan |
| 10 | Mary Ann Poirier | 0 | Daughter | — | Michigan |
| 11 | Frank O. Doyen | 72 | Head | Farmer | Michigan |
| 12 | Mary Doyen | 55 | Wife | — | Michigan |
| 13 | Cecil Doyen | 31 | Son | Oiler | Michigan |
| 14 | Francis O. Doyen | 22 | Head | Welder | Michigan |
| 15 | Eunice Doyen | 24 | Wife | — | Kentucky |
| 16 | Thomas Doyen | 11 | Son | — | Michigan |
| 17 | Patrick Doyen | 8 | Son | — | Michigan |
| 18 | Ralph Doyen | 7 | Son | — | Michigan |
| 19 | Roy Schuler | 31 | Head | Machinist | Michigan |
| 20 | Irene Schuler | 31 | Wife | — | Michigan |
| 21 | Peter Jacobs | 53 | Head | Farmer | Michigan |
| 22 | Cornelia Jacobs | 47 | Wife | — | Michigan |
| 23 | Louis T. Jacobs | 26 | Son | Farm Laborer | Michigan |
| 24 | Marie J. Jacobs | 25 | Daughter | Laborer | Michigan |
| 25 | Margaret M. Jacobs | 23 | Daughter | Laborer | Michigan |
| 26 | Walter P. Jacobs | 22 | Son | Farm Laborer | Michigan |
| 27 | Mary Jane Jacobs | 21 | Daughter | Housekeeper | Michigan |
| 28 | Leona H. Jacobs | 19 | Daughter | Laborer | Michigan |
| 29 | Howard A. Jacobs | 16 | Son | Farm Laborer | Michigan |
| 30 | Elizabeth J. Jacobs | 12 | Daughter | — | Michigan |
| 31 | Robert W. Jacobs THIS PERSON | 10 | Son | — | Michigan |
| 32 | Ambrose F. Jacobs | 6 | Son | — | Michigan |
| 33 | Mose Owens | 48 | Head | Farm Laborer | Kentucky |
| 34 | Bennie Owens | 40 | Wife | — | Kentucky |
| 35 | Joe Billie Owens | 3 | Son | — | Michigan |
| 36 | Oscar Vandoran | 72 | Head | Farmer | Belgium |
| 37 | Hubert Warsaw | 38 | Head | Roofer | Michigan |
| 38 | Meta Warsaw | 28 | Wife | — | Michigan |
| 39 | Elinor Warsaw | 2 | Daughter | — | Michigan |
| 40 | Irene Warsaw | 1 | Daughter | — | Michigan |
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)