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Robert Williamson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Allegheny-County, Pennsylvania
Our Model Tree links this Robert Williamson across the 1910, 1920, 1930 and 1940 US Censuses in Allegheny-County, Pennsylvania (XGBoost, ~Confirmed) — first a head (b.~1878), then head of a 4-person household.
Age 62
b. ~1878
Male
Head
Born: Pennsylvania
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Allegheny-County, Pennsylvania |
| Surname | Williamson |
| Given Name | Robert G. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 62 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Pittsburgh City |
| 1935 Residence (County) | Allegheny |
| Additional Details | |
| Occupation | Engraver |
| Industry | Steel & Copper Plate |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 2000 |
| Highest Grade | No 8 |
| 1935 Residence | Same Place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Occupation | Engraver |
| Township / Ward | Pittsburgh City |
| Est. Birth Year | ~1878 |
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 |
|---|---|---|---|---|
| Nora Williamson | Spouse | — | 53 | ~1887 |
| Robert Williamson | Head | — | 62 | ~1878 |
| Eunice Williamson | Daughter | — | 25 | ~1915 |
| Robert Williamson | Son | — | 22 | ~1918 |
Census Appearances
1910
Allegheny, Pennsylvania
Head, age 32
Allegheny, Pennsylvania · implied b. ~1878 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Williamson |
| Given Name | Robert J |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 32 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| Years Married | 5 |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Scotland |
| Occupation | Engineer |
| Industry | Civil |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | English |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1920
Allegheny, Pennsylvania
Head, age 42
Allegheny, Pennsylvania · implied b. ~1878 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Williamson |
| Given Name | Robert J |
| Relationship to Head | head |
| Sex | M |
| Color / Race | White |
| Age | 42 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Scotland |
| Occupation | Engraver |
| Industry | Steel |
| Class of Worker | E |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Home Owned/Rented | R |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1930
Allegheny, Pennsylvania
Head, age 52
Allegheny, Pennsylvania · implied b. ~1878 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Williamson |
| Given Name | Robert J |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 52 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| Age at First Marriage | 27 |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Scotland |
| Occupation | Engraver |
| Industry | Own Shop |
| Class of Worker | OA |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Home Value / Rent | 7000 |
| Radio Set | R |
| Veteran | No |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Allegheny-County, Pennsylvania
Head, age 62
Allegheny-County, Pennsylvania · implied b. ~1878 — 4 household members
| Surname | Williamson |
| Given Name | Robert G. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 62 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Pittsburgh City |
| 1935 Residence (County) | Allegheny |
| Occupation | Engraver |
| Industry | Steel & Copper Plate |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 2000 |
| Highest Grade | No 8 |
| 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 Williamson across 4 US Census years (1910, 1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Robert Williamson
Head · 1940 · age 62 · b. ~1878 · Pennsylvania
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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
37 people indexed on this census page (nara:1940:m-t0627-03667-00599)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Gloria F. Hococh | 14 | Daughter | — | Pennsylvania |
| 42 | Andrew Enders | 80 | Father-in-law | — | England |
| 43 | Robert C. Bennett | 33 | Head | Meter Reader | Pennsylvania |
| 44 | Marie Bennett | 27 | Wife | — | Pennsylvania |
| 45 | Robert M. Bennett | 8 | Son | — | Pennsylvania |
| 46 | Ronald F. Bennett | 2 | Son | — | Pennsylvania |
| 47 | Joseph B. Schaefers | 49 | Head | Utilityman | Pennsylvania |
| 48 | Rose Schaefers | 47 | Wife | — | Pennsylvania |
| 49 | Albert J. Schaefers | 21 | Son | Repairman | Pennsylvania |
| 50 | Joseph Schaefers | 19 | Son | New Worker | Pennsylvania |
| 51 | Edna Schaefers | 18 | Daughter | — | Pennsylvania |
| 52 | John Schaefers | 16 | Son | — | Pennsylvania |
| 53 | Rose Mary Schaefers | 13 | Daughter | — | Pennsylvania |
| 54 | Grace U. Schaefers | 11 | Daughter | — | Pennsylvania |
| 55 | Bernard Schaefers | 5 | Son | — | Pennsylvania |
| 56 | David Meier | 51 | Head | Steamfitter Helper | Pennsylvania |
| 57 | Agnes Meier | 48 | Wife | — | Pennsylvania |
| 58 | John B. Wallace | 54 | Head | — | Pennsylvania |
| 60 | Giuseppe Aggiletta | 64 | Head | — | Italy |
| 61 | Josephine Aggiletta | 63 | Wife | — | Italy |
| 62 | Samuel F. Ballinger | 39 | Head | Mechanic | Pennsylvania |
| 63 | Cecelia P. Ballinger | 32 | Wife | — | Pennsylvania |
| 64 | Lois Y. Ballinger | 7 | Daughter | — | Pennsylvania |
| 65 | Frank P. Miller | 65 | Head | — | Pennsylvania |
| 66 | Peter Schiffner | 77 | Head | — | Germany |
| 67 | Emma Schiffner | 65 | Wife | — | Germany |
| 68 | Sarah E. Harris | 56 | Head | — | England |
| 69 | Elmer C. Harris | 23 | Son | Pickle Packer | Pennsylvania |
| 70 | Robert Harris | 17 | Son | — | Pennsylvania |
| 72 | Robert G. Williamson THIS PERSON | 62 | Head | Engraver | Pennsylvania |
| 73 | Nora Williamson | 53 | Wife | — | England |
| 74 | Eunice Williamson | 25 | Daughter | Teacher | Pennsylvania |
| 75 | Robert G. Jr. Williamson | 22 | Son | — | Pennsylvania |
| 77 | S. Ella Hertig | 74 | Head | — | Pennsylvania |
| 78 | Cleopha Lish | 27 | Lodger | Sales Clerk | Pennsylvania |
| 79 | Albert C. Schwitzer | 57 | Head | Traffic Clerk | Pennsylvania |
| 80 | Laura E. Schwitzer | 48 | Wife | — | Pennsylvania |
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)