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John Jacobs — 1940 US Census Record
Model Tree available1940 United States Federal Census · Boyd-County, Kentucky
Our Model Tree links this John Jacobs across the 1920, 1930 and 1940 US Censuses in Boyd-County, Kentucky (XGBoost, ~Confirmed), with identified parents Isaac & Samuel — first a head (b.~1906), then head of a 3-person household.
Age 34
b. ~1906
Male
Head
Born: Kentucky
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Boyd-County, Kentucky |
| Surname | Jacobs |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 34 |
| Marital Status | Married |
| Birthplace | Kentucky |
| 1935 Residence (City) | Ashland City |
| 1935 Residence (County) | Boyd |
| Additional Details | |
| Occupation | Usher |
| Industry | Motion Picture Theatre |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 350 |
| Highest Grade | H 2 |
| 1935 Residence | Same Place |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
| Occupation | Usher |
| Township / Ward | Ashland City |
| Est. Birth Year | ~1906 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Carolyn Jacobs | Daughter | — | 1 | ~1939 |
| John Jacobs | Head | — | 34 | ~1906 |
| Alva Jacobs | Spouse | — | 17 | ~1923 |
Census Appearances
1920
Boyd, Kentucky
Son, age 13
Boyd, Kentucky · implied b. ~1907 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Jacob |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Kentucky |
| Father's Birthplace | Kentucky |
| Mother's Birthplace | Kentucky |
| Occupation | none |
| Industry | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
1930
Boyd, Kentucky
Son, age 24
Boyd, Kentucky · implied b. ~1906 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Jacobs |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | Kentucky |
| Father's Birthplace | Kentucky |
| Mother's Birthplace | Kentucky |
| Occupation | Cook |
| Industry | Restaurant |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
1940
Boyd-County, Kentucky
Head, age 34
Boyd-County, Kentucky · implied b. ~1906 — 3 household members
| Surname | Jacobs |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 34 |
| Marital Status | Married |
| Birthplace | Kentucky |
| 1935 Residence (City) | Ashland City |
| 1935 Residence (County) | Boyd |
| Occupation | Usher |
| Industry | Motion Picture Theatre |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 350 |
| Highest Grade | H 2 |
| 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 John Jacobs across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Isaac Jacobs (~0.92 confidence) and father Samuel Jacob (~0.92 confidence) and mother Bess Jacobs (~0.92 confidence) and mother Pearl Jacob (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Isaac Jacobs
b. ~1881
Source father
● Household
· direct · ~0.92
Father
Samuel Jacob
b. ~1883
Source father
● Household
· direct · ~0.92
Mother
Bess Jacobs
b. ~1888
Source mother
● Household
· direct · ~0.92
Mother
Pearl Jacob
b. ~1890
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Jacobs
Head · 1940 · age 34 · b. ~1906 · 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 — Boyd-County, Kentucky
Open full size
1940 US Federal Census — Boyd-County, Kentucky
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01283-00078)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | John Bowman | 30 | Head | Car Loader | Indiana |
| 2 | Elizabeth Bowman | 27 | Wife | — | Illinois |
| 3 | Morgan Collins | 63 | Head | Boiler Maker | Kentucky |
| 4 | Virgie Collins | 29 | Wife | — | Kentucky |
| 5 | Almerrill Collins | 8 | Son | — | Kentucky |
| 6 | Albert Wright | 34 | Head | 1St Helper | Kentucky |
| 7 | Clydia Wright | 34 | Wife | — | Kentucky |
| 8 | Freelin Wright | 10 | Son | — | Kentucky |
| 9 | Katherine Wright | 8 | Daughter | — | Kentucky |
| 10 | Martha Wright | 5 | Daughter | — | Kentucky |
| 11 | James Arbuckle | 35 | Head | Night Watchman | Indiana |
| 12 | Irene Arbuckle | 30 | Wife | Laundress | Kentucky |
| 13 | Robert Arbuckle | 12 | Son | — | Kentucky |
| 14 | William Arbuckle | 10 | Son | — | Kentucky |
| 15 | John Jacobs THIS PERSON | 34 | Head | Usher | Kentucky |
| 16 | Alva Jacobs | 17 | Wife | — | Kentucky |
| 17 | Carolyn Jacobs | 1 | Daughter | — | Kentucky |
| 18 | Bernard Thuff | 39 | Head | Labor | Kentucky |
| 19 | Hazel Thuff | 39 | Wife | — | Kentucky |
| 20 | Hutie Chisom | 59 | Mother-in-law | — | Kentucky |
| 21 | Clyde Thuff | 21 | Brother-in-law | Labor | Kentucky |
| 22 | John Thuff | 18 | Brother-in-law | New Worker | Kentucky |
| 23 | Arvin Vanhoose | 44 | Head | Rivet Sticker | Kentucky |
| 24 | Hazel Vanhoose | 38 | Wife | — | Kentucky |
| 25 | Frieda Vanhoose | 16 | Daughter | — | Kentucky |
| 26 | Norman Vanhoose | 14 | Son | — | Kentucky |
| 27 | Sylvia Vanhoose | 12 | Daughter | — | Kentucky |
| 28 | Phyllis Ann Vanhoose | 8 | Daughter | — | Kentucky |
| 29 | Charlotte Vanhoose | 7 | Daughter | — | Kentucky |
| 30 | Richard Vanhoose | 5 | Son | — | Kentucky |
| 31 | Charles E Vanhoose | 2 | Son | — | Kentucky |
| 32 | Dewey E White | 42 | Head | Electric Crane Optr | Kentucky |
| 33 | Inis White | 37 | Wife | — | Kentucky |
| 34 | Paul White | 18 | Son | New Worker | Kentucky |
| 35 | Charles H Leach | 53 | Head | — | Kentucky |
| 36 | Lydia Leach | 54 | Wife | — | Kentucky |
| 37 | Roy Leach | 36 | Son | Painter | Kentucky |
| 38 | Alleyious Hamper | 46 | Head | Moulder | Ohio |
| 39 | Ellen Hamper | 42 | Wife | — | Ohio |
| 40 | Francis Hamper | 21 | Son | Salesman | Kentucky |
Pedigree Summary
John
Gen 1 · 4 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)