RJ
Robert Jacobs — 1940 US Census Record
Model Tree available1940 United States Federal Census · Jefferson-County, Kentucky
Our Model Tree links this Robert Jacobs across the 1920, 1930 and 1940 US Censuses in Jefferson-County, Kentucky (XGBoost, ~Confirmed), with identified parents M & Milburn — first a head (b.~1909), then head of a 5-person household.
Age 31
b. ~1909
Male
Head
Born: Kentucky
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Jefferson-County, Kentucky |
| Surname | Jacobs |
| Given Name | Robert |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | Black |
| Age | 31 |
| Marital Status | Married |
| Birthplace | Kentucky |
| 1935 Residence (City) | Louisville City |
| 1935 Residence (County) | Jefferson |
| Additional Details | |
| Occupation | Contractor |
| Industry | Building |
| Class of Worker | OA |
| Hours Worked | 32 |
| Income (1939) | 988 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
| Occupation | Contractor |
| Township / Ward | Louisville City |
| Est. Birth Year | ~1909 |
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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Robert | Age | Birth yr |
|---|---|---|---|---|
| Robert Jacobs | Head | — | 31 | ~1909 |
| Caroline Jacobs | Daughter | — | 4 | ~1936 |
| Dorothy Jacobs | Daughter | — | 1 | ~1939 |
| Georgia Jacobs | Spouse | — | 31 | ~1909 |
| Geraldine Jacobs | Daughter | — | 5 | ~1935 |
Census Appearances
1920
Jefferson, Kentucky
Son, age 9
Jefferson, Kentucky · implied b. ~1911 — 7 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 | 9 |
| Marital Status | Single |
| Birthplace | Kentucky |
| Father's Birthplace | Kentucky |
| Mother's Birthplace | Kentucky |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
1930
Jefferson, Kentucky
Son, age 19
Jefferson, Kentucky · implied b. ~1911 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Jacobs |
| Given Name | Robert L. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Kentucky |
| Father's Birthplace | Kentucky |
| Mother's Birthplace | Kentucky |
| Occupation | Cabinet Maker |
| Industry | Steam Railroad |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
1940
Jefferson-County, Kentucky
Head, age 31
Jefferson-County, Kentucky · implied b. ~1909 — 5 household members
| Surname | Jacobs |
| Given Name | Robert |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | Black |
| Age | 31 |
| Marital Status | Married |
| Birthplace | Kentucky |
| 1935 Residence (City) | Louisville City |
| 1935 Residence (County) | Jefferson |
| Occupation | Contractor |
| Industry | Building |
| Class of Worker | OA |
| Hours Worked | 32 |
| Income (1939) | 988 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
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 M Jacobs (~0.92 confidence) and father Milburn Jacobs (~0.92 confidence) and mother Bertha Jacobs (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
M Jacobs
b. ~1883
Source father
● Household
· direct · ~0.92
Father
Milburn Jacobs
b. ~1884
Source father
● Household
· direct · ~0.92
Mother
Bertha Jacobs
b. ~1888
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Robert Jacobs
Head · 1940 · age 31 · b. ~1909 · Kentucky
★ 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 — Jefferson-County, Kentucky
Open full size
1940 US Federal Census — Jefferson-County, Kentucky
Page Contents
23 people indexed on this census page (nara:1940:m-t0627-01369-00436)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Buxton Mccallaway | 43 | Head | Painter | Kentucky |
| 2 | Reba Mccallaway | 45 | Wife | Clerk | Kentucky |
| 3 | John B. Morton | 60 | Head | Mechanic | Kentucky |
| 4 | Sid Morton | 28 | Son | Restaurant Proprietor | Kentucky |
| 5 | Maurice E. Stiff | 31 | Head | Baker | Kentucky |
| 6 | Gladys Stiff | 31 | Wife | — | Kentucky |
| 7 | Maurice E. Stiff | 8 | Son | — | Kentucky |
| 8 | Patsy Mae Stiff | 1 | Daughter | — | Kentucky |
| 9 | George Beeler | 38 | Head | Grinder | Kentucky |
| 10 | Flora R. Beeler | 34 | Wife | Targeting | Kentucky |
| 11 | George Vernon Beeler | 16 | Son | — | Kentucky |
| 12 | Arthur Beeler | 13 | Son | — | Kentucky |
| 13 | Ella Mae Beeler | 11 | Daughter | — | Kentucky |
| 14 | Phillip Gueckstine | 41 | Head | Retailer | Kentucky |
| 15 | Bertha Gueckstine | 40 | Wife | Assistant | Indiana |
| 16 | Margaret Glasser | 26 | Lodger | Bookkeeper | Kentucky |
| 17 | Robert Jacobs THIS PERSON | 31 | Head | Contractor | Kentucky |
| 18 | Georgia Jacobs | 31 | Wife | — | Kentucky |
| 19 | Geraldine Jacobs | 5 | Daughter | — | Kentucky |
| 20 | Caroline Mae Jacobs | 4 | Daughter | — | Kentucky |
| 21 | Dorothy Jacobs | 1 | Daughter | — | Kentucky |
| 22 | Mary Clifton | 40 | Head | Culler | Tennessee |
| 23 | Fred B. Clifton | 11 | Son | — | Tennessee |
Pedigree Summary
Robert
Gen 1 · 3 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)