RC
Robert Caldwell — 1940 US Census Record
Model Tree available1940 United States Federal Census · Allegheny-County, Pennsylvania
Our Model Tree links this Robert Caldwell across the 1920, 1930 and 1940 US Censuses in Allegheny-County, Pennsylvania (XGBoost, ~Confirmed), with identified parents Elizabeth & William — first a son (b.~1918), then head of a 5-person household.
Age 22
b. ~1918
Male
Son
Born: Pennsylvania
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Allegheny-County, Pennsylvania |
| Surname | Caldwell |
| Given Name | Robert M. |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Pittsburgh |
| 1935 Residence (County) | Allegheny |
| Additional Details | |
| Occupation | Salesman |
| Industry | Home Canvas |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 50 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Occupation | Salesman |
| Township / Ward | Pittsburgh |
| 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 Robert | Age | Birth yr |
|---|---|---|---|---|
| William Caldwell | Son | — | 23 | ~1917 |
| William Caldwell | Head | — | 50 | ~1890 |
| Elizabeth Caldwell | Spouse | — | 50 | ~1890 |
| Robert Caldwell | Son | — | 22 | ~1918 |
| Betty Caldwell | Daughter | — | 17 | ~1923 |
Census Appearances
1920
Allegheny, Pennsylvania
Son, age 1
Allegheny, Pennsylvania · implied b. ~1919 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Caldwell |
| Given Name | Robert Neil |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | West Virginia |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1930
Allegheny, Pennsylvania
Son, age 12
Allegheny, Pennsylvania · implied b. ~1918 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Caldwell |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | West Virginia |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Allegheny-County, Pennsylvania
Son, age 22
Allegheny-County, Pennsylvania · implied b. ~1918 — 5 household members
| Surname | Caldwell |
| Given Name | Robert M. |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Pittsburgh |
| 1935 Residence (County) | Allegheny |
| Occupation | Salesman |
| Industry | Home Canvas |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 50 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
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 Caldwell across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Elizabeth Caldwell (~0.92 confidence) and father William Caldwell (~0.92 confidence) and father William Caldwell (~0.92 confidence) and father William Caldwell (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Elizabeth Caldwell
b. ~1890
Source mother
● Household
· direct · ~0.92
Father
William Caldwell
b. ~1890
Source father
● Household
· direct · ~0.92
Father
William Caldwell
b. ~1890
Source father
● Household
· direct · ~0.92
Father
William Caldwell
b. ~1896
Source father
● Household
· direct · ~0.92
This person
Anchor record
Robert Caldwell
Son · 1940 · age 22 · b. ~1918 · Pennsylvania
★ You are viewing this record
Sibling
William Caldwell
Sibling · 1940 · age 23
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Betty Caldwell
Sibling · 1940 · age 17
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 — Allegheny-County, Pennsylvania
Open full size
1940 US Federal Census — Allegheny-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03670-00244)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Annabel Kline | 34 | wife | — | Pennsylvania |
| 42 | Hilda Kline | 18 | daughter | Seamstress | Pennsylvania |
| 43 | J. Howard Kline | 15 | son | New Worker | Pennsylvania |
| 44 | John Jr. Arenburg | 18 | — | — | Pennsylvania |
| 45 | Mary Arenburg | 30 | Head | Seamstress | Pennsylvania |
| 46 | Mary Arenburg | 48 | mother | — | Pennsylvania |
| 47 | John P. Arenburg | 14 | nephew | — | Pennsylvania |
| 48 | Henry Bhon | 13 | — | — | Pennsylvania |
| 49 | Scout Burke | 27 | Head | Auto-Mechanic | Pennsylvania |
| 50 | Anna Burke | 27 | wife | — | Pennsylvania |
| 51 | Scout Jr. Burke | 10 | son | — | Pennsylvania |
| 52 | Herbert Aunlee | 21 | Head | Shipper | Pennsylvania |
| 53 | Catherine Aunlee | 20 | wife | — | Pennsylvania |
| 54 | Herbert Jr. Aunlee | 3 | son | — | Pennsylvania |
| 55 | Louis Sahr | 46 | Head | Puddler | Germany |
| 56 | Elizabeth Sahr | 45 | wife | — | Pennsylvania |
| 57 | Henry M. Sahr | 21 | son | Laborer | Pennsylvania |
| 58 | William Sahr | 19 | son | — | Pennsylvania |
| 59 | Betty Sahr | 16 | daughter | — | Pennsylvania |
| 60 | Caroline Sahr | 14 | daughter | — | Pennsylvania |
| 61 | Anna Sahr | 12 | daughter | — | Pennsylvania |
| 62 | Nancy Sahr | 8 | daughter | — | Pennsylvania |
| 63 | Harry J. Spangler | 35 | Head | Letter Carrier | Pennsylvania |
| 64 | Catherine C. Spangler | 25 | wife | — | Pennsylvania |
| 65 | Roy R. Spangler | 14 | son | — | Pennsylvania |
| 66 | Nellie R. Spangler | 9 | son | — | Pennsylvania |
| 67 | Raymond E. Spangler | 7 | son | — | Pennsylvania |
| 68 | James Spangler | 4 | son | — | Pennsylvania |
| 69 | William J. Caldwell | 50 | Head | Pressman | Pennsylvania |
| 70 | Elizabeth Caldwell | 50 | wife | — | West Virginia |
| 71 | William T. Caldwell | 23 | son | Pressman (Jr) | Pennsylvania |
| 72 | Robert M. Caldwell THIS PERSON | 22 | son | Salesman | Pennsylvania |
| 73 | Betty E. Caldwell | 17 | daughter | — | Pennsylvania |
| 74 | Fred Milligan | 60 | Head | Roofer | Pennsylvania |
| 75 | Cora Milligan | 48 | wife | — | Pennsylvania |
| 76 | James Friedman | 21 | boarder | Roofer (Helper) | Pennsylvania |
| 77 | Olie Branchitte | 22 | boarder | Stenographer | Pennsylvania |
| 78 | George Smith | 73 | boarder | — | West Virginia |
| 79 | Robert Herman | 40 | Head | Laborer | Pennsylvania |
| 80 | Florence Herman | 35 | wife | — | Ohio |
Pedigree Summary
Robert + 2 siblings
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)