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James Jacobs — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Montgomery-County, Ohio
Our Model Tree links this James Jacobs across the 1930 and 1940 US Censuses in Montgomery-County, Ohio (XGBoost, ~Confirmed) — first a head (b.~1878), then head of a 8-person household.
Age 62
b. ~1878
Male
Head
Born: Ohio
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Montgomery-County, Ohio |
| Surname | Jacobs |
| Given Name | James |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 62 |
| Marital Status | Married |
| Birthplace | Ohio |
| 1935 Residence (City) | Dayton City |
| 1935 Residence (County) | Montgomery |
| Additional Details | |
| Occupation | Designer |
| Industry | Wholesale Jewelry |
| Class of Worker | PW |
| Hours Worked | 44 |
| Income (1939) | 1500 |
| Highest Grade | 8 |
| 1935 Residence | Same place |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
| Occupation | Designer |
| Township / Ward | Dayton City |
| 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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to James | Age | Birth yr |
|---|---|---|---|---|
| Charles Jacobs | Son | — | 15 | ~1925 |
| Ruth Mcfarland | Daughter | — | 19 | ~1921 |
| Russell Jacobs | Son | — | 23 | ~1917 |
| Catherine Mcfarland | Daughter | — | 13 | ~1927 |
| Orville Jacobs | Son | — | 20 | ~1920 |
| Robert Jacobs | Son | — | 24 | ~1916 |
| James Jacobs | Head | — | 62 | ~1878 |
| Ruth Jacobs | Spouse | — | 46 | ~1894 |
Census Appearances
1930
Montgomery, Ohio
Head, age 52
Montgomery, Ohio · implied b. ~1878 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Jacobs |
| Given Name | James |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 52 |
| Marital Status | Married |
| Birthplace | Ohio |
| Age at First Marriage | 35 |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Ohio |
| Occupation | manufacturer |
| Industry | Toys |
| Class of Worker | O |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Home Value / Rent | 9000 |
| Radio Set | R |
| Veteran | No |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
1940
Montgomery-County, Ohio
Head, age 62
Montgomery-County, Ohio · implied b. ~1878 — 8 household members
| Surname | Jacobs |
| Given Name | James |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 62 |
| Marital Status | Married |
| Birthplace | Ohio |
| 1935 Residence (City) | Dayton City |
| 1935 Residence (County) | Montgomery |
| Occupation | Designer |
| Industry | Wholesale Jewelry |
| Class of Worker | PW |
| Hours Worked | 44 |
| Income (1939) | 1500 |
| Highest Grade | 8 |
| 1935 Residence | Same place |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
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 James Jacobs across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
James Jacobs
Head · 1940 · age 62 · b. ~1878 · Ohio
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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 — Montgomery-County, Ohio
Open full size
1940 US Federal Census — Montgomery-County, Ohio
Page Contents
38 people indexed on this census page (nara:1940:m-t0627-03253-00233)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | William D Daly | 50 | Wife | — | Ohio |
| 2 | Robert C Daly | 20 | Son | — | Ohio |
| 3 | Jean E Daly | 13 | Daughter | — | Ohio |
| 4 | David Nelmen | 42 | Head | Proprietor | Russia |
| 5 | Eva Nelmen | 40 | Wife | — | Poland |
| 6 | Esther Nelmen | 19 | Daughter | — | Michigan |
| 7 | Henry H Nelmen | 14 | Son | — | Michigan |
| 8 | William F Snyder | 60 | Head | Clergyman | Indiana |
| 9 | Grace D Snyder | 60 | Wife | — | Indiana |
| 11 | Clara Longnecker | 78 | Head | — | Ohio |
| 12 | Irene Longnecker | 45 | Daughter | Teacher | Indiana |
| 13 | Henry R Neilson | 57 | Head | Salesman | Utah |
| 14 | Elizabeth Neilson | 54 | Wife | — | Ohio |
| 15 | Flora A Smith | 78 | Mother-in-law | — | Ohio |
| 16 | Mary Shank | 62 | Head | Teacher | Ohio |
| 17 | Mary R Henderson | 53 | Head | Teacher | Ohio |
| 18 | Helen R Henderson | 43 | Sister | Teacher | Ohio |
| 19 | Clarence G Wilkinson | 63 | Head | Traveling Salesman | Ohio |
| 20 | Jennie B Wilkinson | 64 | Wife | — | Ohio |
| 21 | James Jacobs THIS PERSON | 62 | Head | Designer | Ohio |
| 22 | Ruth Jacobs | 46 | Wife | — | Ohio |
| 23 | Robert Jacobs | 24 | Son | — | Ohio |
| 24 | Russell Jacobs | 23 | Son | Machinist | Ohio |
| 25 | Orville Jacobs | 20 | Son | New Worker | Ohio |
| 26 | Charles Jacobs | 15 | Son | — | Ohio |
| 27 | Ruth Mcfarland | 19 | Daughter | — | Ohio |
| 28 | Catherine J Mcfarland | 13 | Daughter | — | Ohio |
| 29 | Isadore Ablon | 48 | Head | Proprietor | Russia |
| 30 | Louise Ablon | 42 | Wife | — | Mississippi |
| 31 | Rose L Ablon | 24 | Daughter | Manager | Mississippi |
| 32 | Carl S Ablon | 21 | Son | Insurance Agent | Mississippi |
| 33 | Dorothy Ablon | 20 | Daughter | Saleslady | Mississippi |
| 34 | Alvin Ablon | 18 | Son | — | Mississippi |
| 35 | Kathryn Ablon | 17 | Daughter | — | Mississippi |
| 36 | Lillian Ablon | 14 | Daughter | — | Ohio |
| 37 | Charles S Rose | 22 | Lodger | Physician | Ohio |
| 38 | Minnie R Biechoff | 58 | Head | Insurance Agent | Ohio |
| 39 | Minnie Biechoff | 60 | Wife | — | Ohio |
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)