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John Cox — 1940 US Census Record
Model Tree available1940 United States Federal Census · Knox-County, Tennessee
Our Model Tree links this John Cox across the 1920, 1930 and 1940 US Censuses in Knox-County, Tennessee (XGBoost, ~Confirmed), with identified parents Herbert & Robert — first a son (b.~1918), then head of a 5-person household.
Age 22
b. ~1918
Male
Son
Born: Tennessee
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Knox-County, Tennessee |
| Surname | Cox |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Tennessee |
| 1935 Residence (City) | Knoxville |
| 1935 Residence (County) | Knox |
| Additional Details | |
| Occupation | Clerk |
| Industry | Department Store |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 2100 |
| Highest Grade | H-4 |
| 1935 Residence | Same place |
| Birth State | Tennessee |
| Birth Country | United States |
| Birthplace (normalized) | tennessee |
| Occupation | Clerk |
| Township / Ward | Knoxville |
| Est. Birth Year | ~1918 |
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 John | Age | Birth yr |
|---|---|---|---|---|
| Doris Cox | Daughter | — | 9 | ~1931 |
| Herbert Cox | Head | — | 48 | ~1892 |
| John Cox | Son | — | 22 | ~1918 |
| Herbert Cox | Son | — | 6 | ~1934 |
| Thelma Cox | Spouse | — | 37 | ~1903 |
Census Appearances
1920
Knox, Tennessee
Son, age 1
Knox, Tennessee · implied b. ~1919 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cox |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Tennessee |
| Father's Birthplace | Tennessee |
| Mother's Birthplace | North Carolina |
| Occupation | none |
| Can Read | No |
| Can Write | No |
| Speaks English | Yes |
| Birth State | Tennessee |
| Birth Country | United States |
| Birthplace (normalized) | tennessee |
1930
Knox, Tennessee
Son, age 12
Knox, Tennessee · implied b. ~1918 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cox |
| Given Name | John A |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Tennessee |
| Father's Birthplace | Tennessee |
| Mother's Birthplace | Tennessee |
| Can Read/Write | Yes |
| Birth State | Tennessee |
| Birth Country | United States |
| Birthplace (normalized) | tennessee |
1940
Knox-County, Tennessee
Son, age 22
Knox-County, Tennessee · implied b. ~1918 — 5 household members
| Surname | Cox |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Tennessee |
| 1935 Residence (City) | Knoxville |
| 1935 Residence (County) | Knox |
| Occupation | Clerk |
| Industry | Department Store |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 2100 |
| Highest Grade | H-4 |
| 1935 Residence | Same place |
| Birth State | Tennessee |
| Birth Country | United States |
| Birthplace (normalized) | tennessee |
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 Cox across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Herbert Cox (~0.92 confidence) and father Robert Cox (~0.92 confidence) and father Plumer Cox (~0.92 confidence) and mother Nannie Cox (~0.92 confidence) and mother Thelma Cox (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Herbert Cox
b. ~1892
Source father
● Household
· direct · ~0.92
Father
Robert Cox
b. ~1892
Source father
● Household
· direct · ~0.92
Father
Plumer Cox
b. ~1898
Source father
● Household
· direct · ~0.92
Mother
Nannie Cox
b. ~1900
Source mother
● Household
· direct · ~0.92
Mother
Thelma Cox
b. ~1903
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Cox
Son · 1940 · age 22 · b. ~1918 · Tennessee
★ You are viewing this record
Sibling
Herbert Cox
Sibling · 1940 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Doris Cox
Sibling · 1940 · age 9
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, Tennessee
Open full size
1940 US Federal Census — Knox-County, Tennessee
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-03958-00236)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | William Blanc | 5 | Son | — | Tennessee |
| 42 | Carylin Blanc | 3 | Daughter | — | Tennessee |
| 43 | John T Blanc | 1 | Son | — | Tennessee |
| 44 | Charlie T Blanc | 0 | Son | — | Tennessee |
| 45 | Cordelia Lowery | 71 | Head | — | Tennessee |
| 46 | Mary S Lowery | 37 | Daughter | Saleslady | Tennessee |
| 47 | Charles Alexander | 31 | Head | Manager | Tennessee |
| 48 | Helen R Alexander | 37 | Wife | Teacher | Tennessee |
| 49 | John Jack | 52 | Head | Service Manager | Tennessee |
| 50 | Armeda Jack | 42 | Wife | — | Texas |
| 51 | Margaret Jack | 15 | Daughter | — | Tennessee |
| 52 | Dorothy Jack | 15 | Daughter | — | Tennessee |
| 53 | Willis F Marney | 53 | Head | Salesman | Tennessee |
| 54 | Grace S Marney | 36 | Sister | Teacher | Tennessee |
| 55 | Fae L Marney | 32 | Sister | Teacher | Tennessee |
| 56 | Ramon Mcdowell | 43 | Brother in law | Agent | Tennessee |
| 57 | Reese S Mcdowell | 42 | Wife | Service Reporter | Tennessee |
| 58 | Herbert Cox | 48 | Head | Bookkeeper | Tennessee |
| 59 | Thelma Cox | 37 | Wife | — | Tennessee |
| 60 | John Cox THIS PERSON | 22 | Son | Clerk | Tennessee |
| 61 | Doris Cox | 9 | Daughter | — | Tennessee |
| 62 | Herbert Jr. Cox | 6 | Son | — | Tennessee |
| 64 | Martin Calloway | 54 | Head | Sales Manager | Tennessee |
| 65 | Vinima Calloway | 52 | Wife | — | Tennessee |
| 66 | John H Chamberlin | 43 | Head | Traveling Salesman | Tennessee |
| 67 | Rebecca Chamberlin | 43 | Wife | — | Tennessee |
| 68 | Helen Chamberlin | 20 | Daughter | — | Tennessee |
| 69 | John Jr. Chamberlin | 18 | Son | — | Tennessee |
| 70 | Samuel Chandler | 54 | Head | Linotype Operator | Tennessee |
| 71 | Elva Chandler | 43 | Wife | — | Tennessee |
| 72 | Jennie Chandler | 19 | Daughter | — | Tennessee |
| 73 | Samuel Jr. Chandler | 18 | Son | — | Tennessee |
| 74 | Betty Chandler | 12 | Daughter | — | Tennessee |
| 75 | Katherine Chandler | 8 | Daughter | — | Tennessee |
| 76 | Sue Chandler | 5 | Daughter | — | Tennessee |
| 77 | Luther Harkins | 37 | Head | Clerk | Tennessee |
| 78 | May Harkins | 37 | Wife | — | Tennessee |
| 79 | Luther Jr. Harkins | 10 | Son | — | Tennessee |
| 80 | Philip H Shipp | 49 | Head | Safety Engineer | France |
Pedigree Summary
John + 2 siblings
Gen 1 · 5 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)