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John Caldwell — 1940 US Census Record
Model Tree available1940 United States Federal Census · Washington-County, Virginia
Our Model Tree links this John Caldwell across the 1920, 1930 and 1940 US Censuses in Washington-County, Virginia (XGBoost, ~Confirmed), with identified parents Margaret & Thomas — first a son (b.~1912), then head of a 3-person household.
Age 28
b. ~1912
Male
Son
Born: Virginia
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Washington-County, Virginia |
| Surname | Caldwell |
| Given Name | John M. C. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 28 |
| Marital Status | Single |
| Birthplace | Virginia |
| 1935 Residence (City) | Holston District |
| 1935 Residence (County) | Washington |
| Additional Details | |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | OA |
| Hours Worked | 55 |
| Income (1939) | 0 |
| Highest Grade | H-4 |
| 1935 Residence | Same place |
| Birth State | Virginia |
| Birth Country | United States |
| Birthplace (normalized) | virginia |
| Occupation | Farmer |
| Township / Ward | Holston District |
| Est. Birth Year | ~1912 |
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 |
|---|---|---|---|---|
| Margaret Caldwell | Head | — | 53 | ~1887 |
| Jack Caldwell | Son | — | 21 | ~1919 |
| John Caldwell | Son | — | 28 | ~1912 |
Census Appearances
1920
Washington, Virginia
Son, age 8
Washington, Virginia · implied b. ~1912 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Caldwell |
| Given Name | John M |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 8 |
| Marital Status | Single |
| Birthplace | Virginia |
| Father's Birthplace | Virginia |
| Mother's Birthplace | Virginia |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Virginia |
| Birth Country | United States |
| Birthplace (normalized) | virginia |
1930
Washington, Virginia
Son, age 18
Washington, Virginia · implied b. ~1912 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Caldwell |
| Given Name | John W. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Virginia |
| Father's Birthplace | Virginia |
| Mother's Birthplace | Virginia |
| Occupation | Labor |
| Industry | W.W. |
| Class of Worker | VVVV |
| Can Read/Write | Yes |
| Birth State | Virginia |
| Birth Country | United States |
| Birthplace (normalized) | virginia |
1940
Washington-County, Virginia
Son, age 28
Washington-County, Virginia · implied b. ~1912 — 3 household members
| Surname | Caldwell |
| Given Name | John M. C. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 28 |
| Marital Status | Single |
| Birthplace | Virginia |
| 1935 Residence (City) | Holston District |
| 1935 Residence (County) | Washington |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | OA |
| Hours Worked | 55 |
| Income (1939) | 0 |
| Highest Grade | H-4 |
| 1935 Residence | Same place |
| Birth State | Virginia |
| Birth Country | United States |
| Birthplace (normalized) | virginia |
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 Caldwell across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Margaret Caldwell (~0.92 confidence) and father Thomas Caldwell (~0.92 confidence) and mother Margaret Caldwell (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Margaret Caldwell
b. ~1887
Source mother
● Household
· direct · ~0.92
Father
Thomas Caldwell
b. ~1887
Source father
● Household
· direct · ~0.92
Mother
Margaret Caldwell
b. ~1888
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Caldwell
Son · 1940 · age 28 · b. ~1912 · Virginia
★ You are viewing this record
Sibling
Jack Caldwell
Sibling · 1940 · age 21
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, Virginia
Open full size
1940 US Federal Census — Washington-County, Virginia
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-04300-00658)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Margaret Caldwell | 53 | Head | Farmer | Virginia |
| 42 | John M. C. Caldwell THIS PERSON | 28 | Son | Farmer | Virginia |
| 43 | Jack Caldwell | 21 | Son | Salesman | Virginia |
| 44 | M. S. Williamson | 55 | Head | Laborer | Virginia |
| 45 | Sallie M. Williamson | 49 | Wife | Farmer | Virginia |
| 46 | Woodrow Williamson | 21 | Son | — | Virginia |
| 47 | Kenneth Williamson | 16 | Son | — | Virginia |
| 48 | Henry Williamson | 12 | Son | — | Virginia |
| 49 | Ruth Williamson | 10 | Daughter | — | Virginia |
| 50 | Robert P. Blevins | 71 | Head | Farmer | Virginia |
| 51 | Dosi A. Blevins | 65 | Wife | — | Virginia |
| 52 | Henry A. Stevenson | 76 | Sister | — | Virginia |
| 53 | W. P. Helenburg | 47 | Head | Farmer | Virginia |
| 54 | Gertrude Helenburg | 52 | Sister | Teacher | Virginia |
| 55 | Mattie A. Helenburg | 78 | Mother | — | Virginia |
| 56 | Henry P. Anderson | 35 | Head | Farmer | Virginia |
| 57 | Rosa B. Anderson | 32 | Wife | — | Virginia |
| 58 | Dorothy May Anderson | 2 | Daughter | — | Virginia |
| 59 | Mitchell Reed | 40 | Father in law | Laborer | Virginia |
| 60 | Amos Reed | 30 | Brother in law | — | Virginia |
| 61 | Marion Reed | 17 | Brother in law | Laborer | Virginia |
| 62 | Roger Reed | 12 | Brother in law | — | Virginia |
| 63 | Henry Reed | 6 | Brother in law | — | Virginia |
| 64 | Aubrey Reed | 40 | Cousin | — | Virginia |
| 65 | Willard P. Mccann | 14 | Head | Farmer | Virginia |
| 66 | Ruth Mccann | 12 | Wife | — | Virginia |
| 67 | Billy Mccann | 3 | Daughter | — | Virginia |
| 68 | Henry H. Lane | 33 | Head | Farmer | Virginia |
| 69 | Ida May Lane | 23 | Wife | — | North Carolina |
| 70 | Janice Lane | 2 | Daughter | — | Virginia |
| 71 | Caleb P. Neal | 63 | Head | Farmer | Virginia |
| 72 | Malicia Neal | 43 | Wife | — | Virginia |
| 73 | Walter Neal | 28 | Son | Laborer | Virginia |
| 74 | Chas. Dickenson | 24 | Nephew | Laborer | Virginia |
| 75 | Grace Dickenson | 24 | Wife | — | Virginia |
| 76 | R. M. Rosenbaum | 65 | Head | Farmer | Virginia |
| 77 | Nene Rosenbaum | 54 | Wife | — | Virginia |
| 78 | Walter Rosenbaum | 31 | Son | Laborer | Virginia |
| 79 | Milton Rosenbaum | 24 | Son | Laborer | Virginia |
| 80 | Herbert Rosenbaum | 22 | Son | Laborer | Virginia |
Related Census Records
Pedigree Summary
John + 1 sibling
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)