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John Cox — 1940 US Census Record
Model Tree available1940 United States Federal Census · Washington-County, Maryland
Our Model Tree links this John Cox across the 1920, 1930 and 1940 US Censuses in Washington-County, Maryland (XGBoost, ~Confirmed), with identified parents Sarah & Laura — first a son (b.~1911), then head of a 3-person household.
Age 29
b. ~1911
Male
Son
Born: Maryland
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Washington-County, Maryland |
| Surname | Cox |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 29 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | District 19, Keedysville |
| 1935 Residence (County) | Washington |
| Additional Details | |
| Highest Grade | No 0 |
| 1935 Residence | Same place |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Township / Ward | District 19 Keedysville |
| 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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Laura Cox | Head | — | 67 | ~1873 |
| John Cox | Son | — | 29 | ~1911 |
| Edward Cox | Son | — | 35 | ~1905 |
Census Appearances
1920
Washington, Maryland
Son, age 12
Washington, Maryland · implied b. ~1908 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cox |
| Given Name | John E. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Virginia |
| Mother's Birthplace | Maryland |
| Can Read | No |
| Can Write | No |
| Speaks English | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1930
Washington, Maryland
Son, age 21
Washington, Maryland · implied b. ~1909 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cox |
| Given Name | John C. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Virginia |
| Mother's Birthplace | Maryland |
| Can Read/Write | No |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Washington-County, Maryland
Son, age 29
Washington-County, Maryland · implied b. ~1911 — 3 household members
| Surname | Cox |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 29 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | District 19, Keedysville |
| 1935 Residence (County) | Washington |
| Highest Grade | No 0 |
| 1935 Residence | Same place |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
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: mother Sarah Cox (~0.92 confidence) and mother Laura Cox (~0.92 confidence) and father John Cox (~0.92 confidence) and father John Cox (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Sarah Cox
b. ~1872
Source mother
● Household
· direct · ~0.92
Mother
Laura Cox
b. ~1873
Source mother
● Household
· direct · ~0.92
Father
John Cox
b. ~1875
Source father
● Household
· direct · ~0.92
Father
John Cox
b. ~1875
Source father
● Household
· direct · ~0.92
This person
Anchor record
John Cox
Son · 1940 · age 29 · b. ~1911 · Maryland
★ You are viewing this record
Sibling
Edward Cox
Sibling · 1940 · age 35
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 — Washington-County, Maryland
Open full size
1940 US Federal Census — Washington-County, Maryland
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01562-00653)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Harvey H Hetzell | 61 | Head | Foreman | Maryland |
| 2 | Carrie B Hetzell | 53 | Wife | — | Maryland |
| 3 | William R Easterday | 65 | Head | Farmer | Maryland |
| 4 | Bessie Easterday | 65 | Wife | — | Maryland |
| 5 | Lester Easterday | 35 | Son | Farmer | Maryland |
| 6 | Catherine Easterday | 32 | Daughter | — | Maryland |
| 7 | Ellis E Hammond | 41 | Head | — | Virginia |
| 8 | Walter Hammond | 17 | Son | Farm Hand | Maryland |
| 9 | Charles Hammond | 12 | Son | — | Maryland |
| 10 | Jay Hammond | 10 | Son | — | Maryland |
| 11 | Ike Hammond | 8 | Son | — | Maryland |
| 12 | Reagan Hammond | 7 | Daughter | — | Maryland |
| 13 | Connor, John Hammond | 49 | Brother | Farm Hand | West Virginia |
| 14 | Carrie P Thomas | 51 | Head | — | Maryland |
| 15 | Reta Thomas | 29 | Daughter | — | Maryland |
| 16 | Samuel Thomas | 26 | Son | Farm Hand | Maryland |
| 17 | Mildred Thomas | 18 | Daughter | — | Maryland |
| 18 | Vergan Knade | 34 | Boarder | Laborer | Maryland |
| 19 | Clayton W Offenberger | 56 | Head | Farmer | Maryland |
| 20 | Rosie Offenberger | 51 | Wife | — | Maryland |
| 21 | David Offenberger | 50 | Brother | Farm Hand | Maryland |
| 22 | Lola Offenberger | 41 | Sister | — | Maryland |
| 23 | Mabel Offenberger | 27 | Niece | — | Maryland |
| 24 | Marjorie Nause | 23 | Niece | — | Maryland |
| 25 | Laura A Cox | 67 | Head | — | Maryland |
| 26 | Edward Cox | 35 | Son | — | Maryland |
| 27 | John Cox THIS PERSON | 29 | Son | — | Maryland |
| 28 | Floyd H Myers | 36 | Head | Farmer | Maryland |
| 29 | Hazel Myers | 35 | Wife | — | Maryland |
| 30 | Ruby Myers | 10 | Daughter | — | Maryland |
| 31 | Sylvester Coyles | 64 | Head | Car Inspector | Maryland |
| 32 | Florence Coyles | 57 | Wife | — | Maryland |
| 33 | George Coyles | 30 | Son | Truck Driver | Maryland |
| 34 | Ted Coyles | 23 | Son | Farm Hand | Maryland |
| 35 | Dorothy Coyles | 16 | Daughter | — | Maryland |
| 36 | James Coyles | 14 | Son | — | Maryland |
| 37 | John W Lang | 46 | Head | — | Maryland |
| 38 | Florence Lang | 45 | Wife | — | Maryland |
| 39 | Beulah Lang | 22 | Daughter | Clerk | Maryland |
| 40 | John Jr Lang | 20 | Son | New Worker | Maryland |
Pedigree Summary
John + 1 sibling
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)