JJ
John Jacobs — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Bay-County, Michigan
Our Model Tree links this John Jacobs across the 1920, 1930 and 1940 US Censuses in Bay-County, Michigan (XGBoost, ~Confirmed) — first a head (b.~1878), then head of a 6-person household.
Age 62
b. ~1878
Male
Head
Born: Holland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Bay-County, Michigan |
| Surname | Jacobs |
| Given Name | John J |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 62 |
| Marital Status | Married |
| Birthplace | Holland |
| 1935 Residence (City) | Hampton Township |
| 1935 Residence (County) | Bay |
| Naturalization Status | Naturalized |
| Additional Details | |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | OA |
| Income (1939) | 0 |
| Highest Grade | H 4 |
| 1935 Residence | Same House |
| Birth Country | Netherlands |
| Birthplace (normalized) | holland |
| Occupation | Farmer |
| Township / Ward | Hampton Township |
| Est. Birth Year | ~1878 |
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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Mildred Jacobs | Daughter | — | 21 | ~1919 |
| Maureen Jacobs | Daughter | — | 19 | ~1921 |
| John Jacobs | Head | — | 62 | ~1878 |
| Ernest Jacobs | Son | — | 16 | ~1924 |
| Aloysius Jacobs | Son | — | 32 | ~1908 |
| Christine Jacobs | Spouse | — | 60 | ~1880 |
Census Appearances
1920
Bay, Michigan
Head, age 42
Bay, Michigan · implied b. ~1878 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Jacobs |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 42 |
| Marital Status | Married |
| Birthplace | Holland |
| Year of Immigration | 1881 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Holland |
| Mother's Birthplace | Holland |
| Occupation | Farmer |
| Industry | truck farm |
| Class of Worker | OA |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Dutch |
| Home Owned/Rented | O |
| Home Free/Mortgaged | M |
| Birth Country | Netherlands |
| Year of Naturalization | 1890 |
| Birthplace (normalized) | holland |
1930
Bay, Michigan
Head, age 52
Bay, Michigan · implied b. ~1878 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Jacobs |
| Given Name | John J. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 52 |
| Marital Status | Married |
| Birthplace | Holland |
| Naturalization Status | Naturalized |
| Year of Immigration | 1882 |
| Age at First Marriage | 24 |
| Father's Birthplace | Holland |
| Mother's Birthplace | Holland |
| Occupation | Farmer |
| Industry | Truck Farm |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | Dutch |
| Home Owned/Rented | O |
| Birth Country | Netherlands |
| Birthplace (normalized) | holland |
1940
Bay-County, Michigan
Head, age 62
Bay-County, Michigan · implied b. ~1878 — 6 household members
| Surname | Jacobs |
| Given Name | John J |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 62 |
| Marital Status | Married |
| Birthplace | Holland |
| 1935 Residence (City) | Hampton Township |
| 1935 Residence (County) | Bay |
| Naturalization Status | Naturalized |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | OA |
| Income (1939) | 0 |
| Highest Grade | H 4 |
| 1935 Residence | Same House |
| Birth Country | Netherlands |
| Birthplace (normalized) | holland |
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 Jacobs across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Jacobs
Head · 1940 · age 62 · b. ~1878 · Michigan
★ 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 — 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-t0627-01729-00242)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Virginski Christopher Salomon | 22 | Lodger | Laborer | Michigan |
| 2 | Frank H Uhl | 60 | Head | Farmer | Germany |
| 3 | Hattie E Uhl | 60 | Wife | — | Michigan |
| 4 | Ernest Uhl | 25 | Son | Mechanic Of Autos | Michigan |
| 5 | John J Jacobs THIS PERSON | 62 | Head | Farmer | Holland |
| 6 | Christine A Jacobs | 60 | Wife | — | Michigan |
| 7 | Aloysius R Jacobs | 32 | Son | Farmer | Michigan |
| 8 | Mildred Jacobs | 21 | Daughter | Stenographer | Michigan |
| 9 | Maureen Jacobs | 19 | Daughter | New Worker | Michigan |
| 10 | Ernest Jacobs | 16 | Son | — | Michigan |
| 11 | Francis Van Hurk | 47 | Head | Elevator Operator | Michigan |
| 12 | Mable E Van Hurk | 36 | Wife | — | Ohio |
| 13 | Hilda Van Hurk | 12 | Daughter | — | Michigan |
| 14 | Shirley Van Hurk | 9 | Daughter | — | Michigan |
| 15 | Mary Joanna Van Hurk | 7 | Daughter | — | Michigan |
| 16 | Frank Van Hurk | 74 | Head | — | Michigan |
| 17 | Mark A Van Hurk | 48 | Son | Sugar Boiler | Michigan |
| 18 | Peter Van Hurk | 39 | Son | Laborer | Michigan |
| 19 | Fred A Bosco | 40 | Head | Huckster | France |
| 20 | Mae A Bosco | 35 | Wife | — | Michigan |
| 21 | Fred Jr Bosco | 17 | Son | — | Michigan |
| 22 | Rosalia Bosco | 15 | Daughter | — | Michigan |
| 23 | Jane Bosco | 14 | Daughter | — | Michigan |
| 24 | Edward Bosco | 12 | Son | — | Michigan |
| 25 | Mary Ann Bosco | 10 | Daughter | — | Michigan |
| 26 | Annettae Bosco | 9 | Daughter | — | Michigan |
| 27 | Henry E Madsen | 64 | Head | Sales Of Antiques | Michigan |
| 28 | Joseph H Weinberg | 35 | Son-in-law | Attendant | Michigan |
| 29 | Lucile E Weinberg | 36 | Daughter | — | Michigan |
| 30 | Joan B Weinberg | 2 | Grand-Daughter | — | Michigan |
| 31 | Jerry Tampfitt | 36 | Lodger | Machinist | Illinois |
| 32 | Nellie Kempton | 60 | Lodger | House Keeper | Minnesota |
| 33 | Alexander Tracy | 44 | Head | Fisherman | Michigan |
| 34 | Grace U Tracy | 41 | Wife | — | Michigan |
| 35 | Ruth G Sable | 22 | Niece | Office Clerk | Michigan |
| 36 | Frank H Sable | 28 | Nephew | Laborer | Michigan |
| 37 | Edward D Groulx | 80 | Head | Farmer | Canada F |
| 38 | Jane Groulx | 71 | Wife | — | Michigan |
| 39 | Raymond A Groulx | 32 | Head | Farmer | Michigan |
| 40 | Lilly Groulx | 26 | Wife | — | 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)