RC
Robert Cox — 1940 US Census Record
Model Tree available1940 United States Federal Census · Johnson-County, Arkansas
Our Model Tree links this Robert Cox across the 1920, 1930 and 1940 US Censuses in Johnson-County, Arkansas (XGBoost, ~Confirmed), with identified parents John & Lee — first a head (b.~1890), then head of a 4-person household.
Age 50
b. ~1890
Male
Head
Born: Arkansas
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Johnson-County, Arkansas |
| Surname | Cox |
| Given Name | Robert |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 50 |
| Marital Status | Married |
| Birthplace | Arkansas |
| 1935 Residence (City) | Spadra Twp |
| 1935 Residence (County) | Johnson |
| Additional Details | |
| Occupation | Carpenter |
| Industry | Carpenter |
| Class of Worker | PW |
| Hours Worked | 42 |
| Income (1939) | 540 |
| Highest Grade | Hs 1 |
| 1935 Residence | Same place |
| Birth State | Arkansas |
| Birth Country | United States |
| Birthplace (normalized) | arkansas |
| Occupation | Carpenter |
| Township / Ward | Spadra Twp |
| Est. Birth Year | ~1890 |
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 |
|---|---|---|---|---|
| Maderine Cox | Daughter | — | 21 | ~1919 |
| Robert Cox | Head | — | 50 | ~1890 |
| James Cox | Son | — | 14 | ~1926 |
| Ellen Cox | Spouse | — | 49 | ~1891 |
Census Appearances
1920
Johnson, Arkansas
Son, age 30
Johnson, Arkansas · implied b. ~1890 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cox |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 30 |
| Marital Status | Married |
| Birthplace | Arkansas |
| Father's Birthplace | Arkansas |
| Mother's Birthplace | Arkansas |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | OA |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Arkansas |
| Birth Country | United States |
| Birthplace (normalized) | arkansas |
1930
Johnson, Arkansas
Son, age 40
Johnson, Arkansas · implied b. ~1890 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cox |
| Given Name | Robert E |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 40 |
| Marital Status | Married |
| Birthplace | Arkansas |
| Age at First Marriage | 25 |
| Father's Birthplace | Arkansas |
| Mother's Birthplace | Arkansas |
| Occupation | Carpenter |
| Industry | House |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Arkansas |
| Birth Country | United States |
| Birthplace (normalized) | arkansas |
1940
Johnson-County, Arkansas
Head, age 50
Johnson-County, Arkansas · implied b. ~1890 — 4 household members
| Surname | Cox |
| Given Name | Robert |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 50 |
| Marital Status | Married |
| Birthplace | Arkansas |
| 1935 Residence (City) | Spadra Twp |
| 1935 Residence (County) | Johnson |
| Occupation | Carpenter |
| Industry | Carpenter |
| Class of Worker | PW |
| Hours Worked | 42 |
| Income (1939) | 540 |
| Highest Grade | Hs 1 |
| 1935 Residence | Same place |
| Birth State | Arkansas |
| Birth Country | United States |
| Birthplace (normalized) | arkansas |
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 Cox across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father John Cox (~0.92 confidence) and father Lee Cox (~0.92 confidence) and mother Ella Cox (~0.50 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.78
Father
John Cox
b. ~1847
Source father
● Household
· direct · ~0.92
Father
Lee Cox
b. ~1866
Source father
● Household
· direct · ~0.92
Mother
Ella Cox
b. ~1891
Source mother
● Household
· direct · ~0.5
This person
Anchor record
Robert Cox
Head · 1940 · age 50 · b. ~1890 · Arkansas
★ 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 — Johnson-County, Arkansas
Open full size
1940 US Federal Census — Johnson-County, Arkansas
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00147-00492)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Lucille Borton | 12 | Daughter | — | Arkansas |
| 42 | Ellis Borton | 10 | Son | — | Oklahoma |
| 43 | Donald Borton | 3 | Son | — | Oklahoma |
| 44 | Ira Chailes | 31 | Head | Herderon | Arkansas |
| 45 | Twyla Chailes | 5 | Daughter | — | Arkansas |
| 46 | Ines Chailes | 2 | Daughter | — | Arkansas |
| 47 | Essie Lou Chailes | 5 | Son | — | Arkansas |
| 48 | Charles A. C. Nichols | 67 | Head | Farmer | Tennessee |
| 49 | Eva Nichols | 66 | Wife | — | Arkansas |
| 50 | Lidine Nichols | 45 | Daughter | — | Arkansas |
| 51 | Lomeala Nichols | 4 | Daughter | — | Arkansas |
| 52 | Jarret Nichols | 20 | Head | Farmer | Arkansas |
| 53 | Emma Nichols | 18 | Wife | — | Arkansas |
| 54 | William M. Nichols | 5 | Son | — | Arkansas |
| 55 | Thomas T. Edwards | 34 | Head | Farmer | Texas |
| 56 | Willie Edwards | 35 | Wife | — | Arkansas |
| 57 | Lastrey Edwards | 14 | Daughter | — | Arkansas |
| 58 | Bobby Edwards | 12 | Son | — | Texas |
| 59 | Chester Edwards | 10 | Son | — | Arkansas |
| 60 | Don Edwards | 7 | Son | — | Oklahoma |
| 61 | Fay Edwards | 4 | Son | — | Oklahoma |
| 62 | Edwards | 1 | Daughter | — | Arkansas |
| 63 | Mary Gray | 32 | Head | — | Arkansas |
| 64 | Billie Cooper | 5 | Boarder | — | Arkansas |
| 65 | James Williamson | 33 | Head | Farmer | Arkansas |
| 66 | Eman Williamson | 30 | Daughter | — | Arkansas |
| 67 | Lillian Williamson | 6 | Daughter | — | Arkansas |
| 68 | James Williamson | 3 | Son | — | Arkansas |
| 69 | Williamson | 1 | Son | — | Arkansas |
| 70 | Williamson | 5 | Daughter | — | Arkansas |
| 71 | Williamson | 1 | Son | — | Arkansas |
| 72 | Robert Cox THIS PERSON | 50 | Head | Carpenter | Arkansas |
| 73 | Ellen O. Cox | 49 | Wife | — | Arkansas |
| 74 | Maderine Cox | 21 | Daughter | — | Arkansas |
| 75 | James Robert Cox | 14 | Son | — | Arkansas |
| 76 | James E. O. Russell | 42 | Head | Miner | Arkansas |
| 77 | Frances Russell | 40 | Wife | — | Arkansas |
| 78 | Thelma Russell | 17 | Daughter | — | Arkansas |
| 79 | Tom Russell | 15 | Son | — | Arkansas |
| 80 | Frank Russell | 13 | Son | — | Arkansas |
Pedigree Summary
Robert
Gen 1 · 3 parents
~0.78
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)