JC
John Caldwell — 1940 US Census Record
Model Tree available1940 United States Federal Census · Washington-County, Pennsylvania
Our Model Tree links this John Caldwell across the 1920, 1930 and 1940 US Censuses in Washington-County, Pennsylvania (XGBoost, ~Confirmed), with identified parents Matthew & Elizabeth — first a son (b.~1907), then head of a 6-person household.
Age 33
b. ~1907
Male
Son
Born: Scotland
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Washington-County, Pennsylvania |
| Surname | Caldwell |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 33 |
| Marital Status | Single |
| Birthplace | Scotland |
| 1935 Residence (City) | Monongahela |
| 1935 Residence (County) | Lanark |
| Naturalization Status | Naturalized |
| Additional Details | |
| Occupation | Meter Reader |
| Industry | Natural Gas |
| Class of Worker | PW |
| Hours Worked | 46 |
| Income (1939) | 1700 |
| Highest Grade | Hs 1 |
| 1935 Residence | Scotland |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
| Occupation | Meter Reader |
| Township / Ward | Monongahela |
| Est. Birth Year | ~1907 |
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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Marion Caldwell | Daughter | — | 29 | ~1911 |
| Ann Caldwell | Daughter | — | 35 | ~1905 |
| Matthew Caldwell | Head | — | 65 | ~1875 |
| John Caldwell | Son | — | 33 | ~1907 |
| James Caldwell | Son | — | 15 | ~1925 |
| Elizabeth Caldwell | Spouse | — | 57 | ~1883 |
Census Appearances
1920
Washington, Pennsylvania
Son, age 13
Washington, Pennsylvania · implied b. ~1907 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Caldwell |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Scotland |
| Year of Immigration | 1910 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Scotland |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Scotch |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
1930
Washington, Pennsylvania
Son, age 23
Washington, Pennsylvania · implied b. ~1907 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Caldwell |
| Given Name | John C. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Scotland |
| Naturalization Status | Naturalized |
| Year of Immigration | 1910 |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Scotland |
| Occupation | Laborer |
| Industry | Foundry |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | Scotch |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
1940
Washington-County, Pennsylvania
Son, age 33
Washington-County, Pennsylvania · implied b. ~1907 — 6 household members
| Surname | Caldwell |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 33 |
| Marital Status | Single |
| Birthplace | Scotland |
| 1935 Residence (City) | Monongahela |
| 1935 Residence (County) | Lanark |
| Naturalization Status | Naturalized |
| Occupation | Meter Reader |
| Industry | Natural Gas |
| Class of Worker | PW |
| Hours Worked | 46 |
| Income (1939) | 1700 |
| Highest Grade | Hs 1 |
| 1935 Residence | Scotland |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
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: father Matthew Caldwell (~0.92 confidence) and mother Elizabeth Caldwell (~0.92 confidence) and mother Elizabeth Caldwell (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Matthew Caldwell
b. ~1874
Source father
● Household
· direct · ~0.92
Mother
Elizabeth Caldwell
b. ~1883
Source mother
● Household
· direct · ~0.92
Mother
Elizabeth Caldwell
b. ~1884
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Caldwell
Son · 1940 · age 33 · b. ~1907 · Pennsylvania
★ You are viewing this record
Sibling
Ann Caldwell
Sibling · 1940 · age 35
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Marion Caldwell
Sibling · 1940 · age 29
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Caldwell
Sibling · 1940 · age 15
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, Pennsylvania
Open full size
1940 US Federal Census — Washington-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03624-00416)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Margaret Dinsmore | 18 | Niece | — | Pennsylvania |
| 42 | Charles Schultz | 43 | Head | Blacksmith | Pennsylvania |
| 43 | Myrtle Schultz | 41 | Wife | — | Indiana |
| 44 | Edward Schultz | 21 | Son | Meat Cutter | Pennsylvania |
| 45 | Matthew Caldwell | 65 | Head | Clerk | Scotland |
| 46 | Elizabeth Caldwell | 57 | Wife | — | Scotland |
| 47 | Ann Caldwell | 35 | Daughter | Superintendent | Scotland |
| 48 | John Caldwell THIS PERSON | 33 | Son | Meter Reader | Scotland |
| 49 | Marion Caldwell | 29 | Daughter | Clerk | Scotland |
| 50 | James Caldwell | 15 | Son | — | Pennsylvania |
| 51 | William Cairn | 61 | Head | Machinist | Pennsylvania |
| 52 | Hannah Cairn | 53 | Wife | — | Pennsylvania |
| 53 | Florence Cairn | 20 | Daughter | New Worker | Pennsylvania |
| 54 | John Andus | 34 | Head | Core Maker | Pennsylvania |
| 55 | Elizabeth Andus | 25 | Wife | — | Pennsylvania |
| 56 | Donna Andus | 8 | Daughter | — | Pennsylvania |
| 57 | Norma Jane Andus | 1 | Daughter | — | Pennsylvania |
| 58 | Austin Deshields | 45 | Head | Brakeman | Pennsylvania |
| 59 | Helen Deshields | 39 | Wife | — | Pennsylvania |
| 60 | Eleanor Deshields | 16 | Daughter | — | Pennsylvania |
| 61 | Walter Jr. Deshields | 13 | Son | — | Pennsylvania |
| 62 | Harry H. Paterson | 42 | Head | Miner | Scotland |
| 63 | Dalina Paterson | 37 | Wife | — | Pennsylvania |
| 64 | Loraine Paterson | 10 | Daughter | — | Pennsylvania |
| 65 | Norma Paterson | 8 | Daughter | — | Pennsylvania |
| 66 | Samuel Mallee | 37 | Head | Laborer | Pennsylvania |
| 67 | Alma Mallee | 35 | Wife | — | Pennsylvania |
| 68 | Wilma Mallee | 12 | Daughter | — | Pennsylvania |
| 69 | Sallie Mallee | 10 | Daughter | — | Pennsylvania |
| 70 | Fred Rofeman | 42 | Head | Miner | Pennsylvania |
| 71 | Pauline Rofeman | 34 | Wife | — | Pennsylvania |
| 72 | June Rofeman | 3 | Daughter | — | Pennsylvania |
| 73 | Benjamin Farquar | 34 | Head | Electrician | Pennsylvania |
| 74 | Emma Farquar | 32 | Wife | School Teacher | Pennsylvania |
| 75 | David Hartman | 40 | Head | Moulder | England |
| 76 | Mary Hartman | 35 | Wife | — | Pennsylvania |
| 77 | Dorothy Hartman | 18 | Daughter | New Worker | Pennsylvania |
| 78 | Lillian Hartman | 15 | Daughter | — | Pennsylvania |
| 79 | David Jr. Hartman | 8 | Son | — | Pennsylvania |
| 80 | Raymond Wall | 46 | Head | Fireman | Pennsylvania |
Pedigree Summary
John + 3 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)