JC
John Cobb — 1940 US Census Record
Model Tree available1940 United States Federal Census · Knox-County, Kentucky
Our Model Tree links this John Cobb across the 1920, 1930 and 1940 US Censuses in Knox-County, Kentucky (XGBoost, ~Confirmed), with identified parents Gill & Naomi — first a son (b.~1911), then head of a 7-person household.
Age 29
b. ~1911
Male
Son
Born: Kentucky
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Knox-County, Kentucky |
| Surname | Cobb |
| Given Name | John W |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 29 |
| Marital Status | Single |
| Birthplace | Kentucky |
| 1935 Residence (City) | Mag. D. 8 |
| 1935 Residence (County) | Knox |
| Additional Details | |
| Occupation | Miner |
| Industry | Coal mine |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 420 |
| Highest Grade | No 8 |
| 1935 Residence | Same house |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
| Occupation | Miner |
| Township / Ward | Mag D 8 |
| Est. Birth Year | ~1911 |
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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Gill Cobb | Head | — | 67 | ~1873 |
| Nannie Cobb | Spouse | — | 54 | ~1886 |
| Dora Cobb | Daughter | — | 26 | ~1914 |
| John Cobb | Son | — | 29 | ~1911 |
| Charley Cobb | Son | — | 22 | ~1918 |
| Betty Cobb | Daughter | — | 18 | ~1922 |
| Andy Cobb | Son | — | 33 | ~1907 |
Census Appearances
1920
Knox, Kentucky
Son, age 7
Knox, Kentucky · implied b. ~1913 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cobb |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 7 |
| Marital Status | Single |
| Birthplace | Kentucky |
| Father's Birthplace | Kentucky |
| Mother's Birthplace | Kentucky |
| Speaks English | Yes |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
1930
Knox, Kentucky
Son, age 18
Knox, Kentucky · implied b. ~1912 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cobb |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Kentucky |
| Father's Birthplace | Kentucky |
| Mother's Birthplace | Kentucky |
| Occupation | Laborer |
| Industry | General Farm |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
1940
Knox-County, Kentucky
Son, age 29
Knox-County, Kentucky · implied b. ~1911 — 7 household members
| Surname | Cobb |
| Given Name | John W |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 29 |
| Marital Status | Single |
| Birthplace | Kentucky |
| 1935 Residence (City) | Mag. D. 8 |
| 1935 Residence (County) | Knox |
| Occupation | Miner |
| Industry | Coal mine |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 420 |
| Highest Grade | No 8 |
| 1935 Residence | Same house |
| 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 Cobb across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Gill Cobb (~0.92 confidence) and mother Naomi Cobb (~0.92 confidence) and mother Nannie Cobb (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Gill Cobb
b. ~1873
Source father
● Household
· direct · ~0.92
Mother
Naomi Cobb
b. ~1877
Source mother
● Household
· direct · ~0.92
Mother
Nannie Cobb
b. ~1886
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Cobb
Son · 1940 · age 29 · b. ~1911 · Kentucky
★ You are viewing this record
Sibling
Dora Cobb
Sibling · 1940 · age 26
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Charley Cobb
Sibling · 1940 · age 22
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Andy Cobb
Sibling · 1940 · age 33
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Betty Cobb
Sibling · 1940 · age 18
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, Kentucky
Open full size
1940 US Federal Census — Knox-County, Kentucky
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01326-01356)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Agney C Logan | 57 | Wife | — | Kentucky |
| 2 | Alvis Logan | 33 | Son | Farmer | Kentucky |
| 3 | James H Logan | 26 | Son | Farm Laborer | Kentucky |
| 4 | Bettie Logan | 49 | Head | — | Kentucky |
| 5 | Elmer Logan | 21 | Son | Miner | Kentucky |
| 6 | Vivian Logan | 9 | Daughter | — | Kentucky |
| 7 | Mat S Lindon | 59 | Head | Farmer | Kentucky |
| 8 | Emily Lindon | 57 | Wife | — | Kentucky |
| 9 | Randolph Lindon | 28 | Son | Taxi | Kentucky |
| 10 | Susan R Lindon | 22 | Son | — | Kentucky |
| 11 | Tavis Lindon | 18 | Daughter | Sewing | Kentucky |
| 12 | Travis Adams | 40 | Head | Farmer | Kentucky |
| 13 | Cora Adams | 29 | Wife | — | Kentucky |
| 14 | Hazel Adams | 8 | Daughter | — | Kentucky |
| 15 | Ben Wilson | 38 | Head | Miner | Kentucky |
| 16 | Nellie Wilson | 36 | Wife | — | Kentucky |
| 17 | Geneva Wilson | 14 | Daughter | — | Kentucky |
| 18 | Wannade Wilson | 12 | Daughter | — | Kentucky |
| 19 | Berneda Wilson | 9 | Daughter | — | Kentucky |
| 20 | B. D. Wilson | 5 | Son | — | Kentucky |
| 21 | Gill Cobb | 67 | Head | Farmer | Kentucky |
| 22 | Nannie Cobb | 54 | Wife | — | Kentucky |
| 23 | Andy Cobb | 33 | Son | Miner | Kentucky |
| 24 | John W Cobb THIS PERSON | 29 | Son | Miner | Kentucky |
| 25 | Dora Cobb | 26 | Daughter | Housekeeper | Kentucky |
| 26 | Charley Cobb | 22 | Son | Farm Laborer | Kentucky |
| 27 | Betty Cobb | 18 | Daughter | — | Kentucky |
| 28 | Leander Gogan | 44 | Head | — | Kentucky |
| 29 | Ollie Gogan | 34 | Wife | — | Kentucky |
| 30 | E. V. Gogan | 70 | Head | — | Kentucky |
| 31 | Sintha Gogan | 69 | Wife | — | Kentucky |
| 32 | Edd Senters | 28 | Head | Mining | Kentucky |
| 33 | Mary Senters | 32 | Wife | — | Kentucky |
| 34 | Green Mary E Senters | 12 | Niece | — | Kentucky |
| 35 | Andy J. Senters | 57 | Head | Merchant | Kentucky |
| 36 | Mary Senters | 34 | Wife | — | Kentucky |
| 37 | Calloway Senters | 5 | Daughter | — | Kentucky |
| 38 | Andy J. Jr. Senters | 4 | Son | — | Kentucky |
| 39 | Ben Million | 61 | Head | — | Kentucky |
| 40 | Filoria C Million | 36 | Wife | — | Kentucky |
Pedigree Summary
John + 4 siblings
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)