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Robert Jacobs — 1940 US Census Record
Model Tree available1940 United States Federal Census · Knox-County, Ohio
Our Model Tree links this Robert Jacobs across the 1920, 1930 and 1940 US Censuses in Knox-County, Ohio (XGBoost, ~Confirmed), with identified parents George & Mertie — first a son (b.~1919), then head of a 4-person household.
Age 21
b. ~1919
Male
Son
Born: Ohio
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Knox-County, Ohio |
| Surname | Jacobs |
| Given Name | Robert E. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Ohio |
| 1935 Residence (City) | Knox |
| 1935 Residence (County) | Knox |
| Additional Details | |
| Occupation | Miller |
| Industry | Goods |
| Class of Worker | OA |
| Hours Worked | 60 |
| Income (1939) | 384 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
| Occupation | Miller |
| Est. Birth Year | ~1919 |
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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Robert | Age | Birth yr |
|---|---|---|---|---|
| Myrta Jacobs | Spouse | — | 62 | ~1878 |
| George Jacobs | Head | — | 58 | ~1882 |
| Harold Jacobs | Son | — | 30 | ~1910 |
| Robert Jacobs | Son | — | 21 | ~1919 |
Census Appearances
1920
Knox, Ohio
Son, age 1
Knox, Ohio · implied b. ~1919 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Jacobs |
| Given Name | Robert C. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Ohio |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Ohio |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
1930
Knox, Ohio
Son, age 11
Knox, Ohio · implied b. ~1919 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Jacobs |
| Given Name | Robert C. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Ohio |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Ohio |
| Can Read/Write | Yes |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
1940
Knox-County, Ohio
Son, age 21
Knox-County, Ohio · implied b. ~1919 — 4 household members
| Surname | Jacobs |
| Given Name | Robert E. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Ohio |
| 1935 Residence (City) | Knox |
| 1935 Residence (County) | Knox |
| Occupation | Miller |
| Industry | Goods |
| Class of Worker | OA |
| Hours Worked | 60 |
| Income (1939) | 384 |
| Highest Grade | H 4 |
| 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 Robert Jacobs across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father George Jacobs (~0.92 confidence) and mother Mertie Jacobs (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
George Jacobs
b. ~1882
Source father
● Household
· direct · ~0.92
Mother
Mertie Jacobs
b. ~1876
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Robert Jacobs
Son · 1940 · age 21 · b. ~1919 · Ohio
★ You are viewing this record
Sibling
Harold Jacobs
Sibling · 1940 · age 30
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 — Knox-County, Ohio
Open full size
1940 US Federal Census — Knox-County, Ohio
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03093-00818)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Mary Porter | 62 | Wife | Housewife | Ohio |
| 42 | Harry Porter | 40 | Son | Farmer | Ohio |
| 43 | George Jr. Porter | 31 | Son | P. Games | Ohio |
| 44 | Helen M. Porter | 19 | Daughter | Housewife | Ohio |
| 45 | Lulu A. Johnson | 62 | Head | Housekeeper | Ohio |
| 46 | Carl R. Wyant | 27 | Head | Farmer | Ohio |
| 47 | Dollie M. Wyant | 31 | Sister | Stenographer | Ohio |
| 48 | Theodore L. Wyant | 34 | Brother | Farmer | Ohio |
| 49 | Paul K. Wyant | 36 | Brother | — | Ohio |
| 50 | Frank Barber | 51 | Head | Farmer | Ohio |
| 51 | Carrie A. Barber | 52 | Wife | Housewife | Ohio |
| 52 | Samuel Kirkpatrick | 53 | Farmhand | Farmer | Ohio |
| 53 | Hazel Moore | 39 | Housekeeper | Housekeeper | Ohio |
| 54 | Frank H. Lehman | 55 | Head | Farmer | Ohio |
| 55 | Minnie M. Lehman | 35 | Wife | Housewife | Ohio |
| 56 | Edith M. Lehman | 15 | Daughter | Housekeeper | Ohio |
| 57 | Alice A. Bebout | 58 | Head | Production | Ohio |
| 58 | Marianne Bebout | 47 | Wife | Housewife | New York |
| 59 | Virginia R. Bebout | 9 | Daughter | Student | Ohio |
| 60 | John R. Bebout | 7 | Son | Student | Ohio |
| 61 | Brazier Lehman | 44 | Head | Farmer | Ohio |
| 62 | Paul C. Brown | 38 | Head | Farmer | Ohio |
| 63 | Sylvia E. Brown | 36 | Wife | Housewife | Ohio |
| 64 | Ronald E. Brown | 11 | Son | Student | Ohio |
| 65 | Lelone M. Brown | 16 | Daughter | Student | Ohio |
| 66 | Joseph R. Lehman | 52 | Head | Farmer | Ohio |
| 67 | George D. Jacobs | 25 | Head | Farmer | Ohio |
| 68 | Helen E. Jacobs | 19 | Wife | Housewife | Ohio |
| 69 | George G. Jacobs | 0 | Son | — | Ohio |
| 70 | George B. Jacobs | 58 | Head | Miller | Ohio |
| 71 | Myrta D. Jacobs | 62 | Wife | Housewife | Ohio |
| 72 | Harold M. Jacobs | 30 | Son | Miller | Ohio |
| 73 | Robert E. Jacobs THIS PERSON | 21 | Son | Miller | Ohio |
| 74 | Emmett Johnson | 51 | Head | Operator | Ohio |
| 75 | Lulu H. Ash | 60 | Head | Housekeeper | Ohio |
| 76 | Clyde Hagerman | 59 | Head | Farmer | Ohio |
| 77 | Paul W. Rex | 44 | Head | Service Att | Ohio |
| 78 | Gladys C. Rex | 44 | Wife | Housewife | Ohio |
| 79 | Eloise R. Rex | 17 | Daughter | Student | Ohio |
| 80 | Paul Jr. Rex | 16 | Son | Student | Ohio |
Related Census Records
Pedigree Summary
Robert + 1 sibling
Gen 1 · 2 parents
~0.92
Max depth 4 (1900–1950 window)
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)