RT
Ralph Thomas — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Allegheny-County, Pennsylvania
Our Model Tree links this Ralph Thomas across the 1930 and 1940 US Censuses in Allegheny-County, Pennsylvania (XGBoost, ~Confirmed) — first a son (b.~1921), then head of a 13-person household.
Age 19
b. ~1921
Male
Son
Born: Pennsylvania
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Allegheny-County, Pennsylvania |
| Surname | Thomas |
| Given Name | Ralph H Jr |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Pittsburgh City |
| 1935 Residence (County) | Allegheny |
| Additional Details | |
| Occupation | Laborer |
| Industry | Mills |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 390 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Occupation | Laborer |
| Township / Ward | Pittsburgh City |
| Est. Birth Year | ~1921 |
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.
13 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Ralph | Age | Birth yr |
|---|---|---|---|---|
| Charles Thomas | Son | — | 15 | ~1925 |
| Ralph Thomas | Head | — | 49 | ~1891 |
| Margaret Thomas | Spouse | — | 44 | ~1896 |
| Ralph Thomas | Son | — | 19 | ~1921 |
| Mary Thomas | Daughter | — | 17 | ~1923 |
| John Thomas | Son | — | 16 | ~1924 |
| Margaret Thomas | Daughter | — | 10 | ~1930 |
| William Thomas | Son | — | 13 | ~1927 |
| Helen Hirth | Other | — | 40 | ~1900 |
| Edward Thomas | Son | — | 12 | ~1928 |
| Ruth Thomas | Daughter | — | 21 | ~1919 |
| James Thomas | Son | — | 11 | ~1929 |
| Lawrence Thomas | Son | — | 5 | ~1935 |
Census Appearances
1930
Allegheny, Pennsylvania
Son, age 11
Allegheny, Pennsylvania · implied b. ~1919 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thomas |
| Given Name | Ralph H. Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | New York |
| Mother's Birthplace | Pennsylvania |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Allegheny-County, Pennsylvania
Son, age 19
Allegheny-County, Pennsylvania · implied b. ~1921 — 13 household members
| Surname | Thomas |
| Given Name | Ralph H Jr |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Pittsburgh City |
| 1935 Residence (County) | Allegheny |
| Occupation | Laborer |
| Industry | Mills |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 390 |
| 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 Ralph Thomas across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Ralph Thomas
Son · 1940 · age 19 · b. ~1921 · Pennsylvania
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Sibling
Mary Thomas
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Thomas
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Charles Thomas
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lawrence Thomas
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Thomas
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ruth Thomas
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Edward Thomas
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Thomas
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Thomas
Sibling · 1940 · age 11
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-t0627-03656-00463)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Frederick H Stewart | 65 | Brother in law | — | Pennsylvania |
| 2 | Dorothy Snyder | 23 | Daughter | Saleswoman | Pennsylvania |
| 3 | Peter S Snyder | 1 | Son | — | Pennsylvania |
| 4 | Frederick J Hug | 35 | Head | Dairy Husbandry | Pennsylvania |
| 5 | Luella Hug | 31 | Wife | Nurse | Pennsylvania |
| 6 | Frank W Grimes | 53 | Head | Clerk | Pennsylvania |
| 7 | Annette Grimes | 58 | Sister | — | Pennsylvania |
| 8 | Charles Grimes | 56 | Brother | Druggist | Pennsylvania |
| 9 | Mary H Grimes | 52 | Sister | — | Pennsylvania |
| 10 | Ralph H Thomas | 49 | Head | Superintendent | Pennsylvania |
| 11 | Margaret H Thomas | 44 | Wife | — | Pennsylvania |
| 12 | Ruth H Thomas | 21 | Daughter | Secretary | Pennsylvania |
| 13 | Ralph H Jr Thomas THIS PERSON | 19 | Son | Laborer | Pennsylvania |
| 14 | Mary H Thomas | 17 | Daughter | — | Pennsylvania |
| 15 | John W Thomas | 16 | Son | — | Pennsylvania |
| 16 | Charles S Thomas | 15 | Son | — | Pennsylvania |
| 17 | William R Thomas | 13 | Son | — | Pennsylvania |
| 18 | Edward S Thomas | 12 | Son | — | Pennsylvania |
| 19 | James H Thomas | 11 | Son | — | Pennsylvania |
| 20 | Margaret A Thomas | 10 | Daughter | — | Pennsylvania |
| 21 | Lawrence R Thomas | 5 | Son | — | Pennsylvania |
| 22 | Helen L Hirth | 40 | Sister in law | Stenographer | Pennsylvania |
| 23 | Charles H Probst | 30 | Head | Salesman | Pennsylvania |
| 24 | Agatha S Probst | 30 | Wife | — | Pennsylvania |
| 25 | Caroline Probst | 2 | Daughter | — | Pennsylvania |
| 26 | Joseph H Mccormick | 25 | Head | Bookkeeper | Pennsylvania |
| 27 | Mary Alice Mccormick | 21 | Wife | Saleswoman | Pennsylvania |
| 28 | Andrew Neuhart | 56 | Head | Practical Nurse | Ohio |
| 29 | Mildred Neuhart | 28 | Daughter | Clerk | Pennsylvania |
| 30 | Edward Neuhart | 14 | Son | — | Pennsylvania |
| 31 | Lona Hunt | 86 | Mother | — | Ohio |
| 32 | Stella Lubarski | 52 | Head | — | Poland |
| 33 | John E Lubarski | 27 | Son | Bottler | Pennsylvania |
| 34 | Henry Lubarski | 20 | Son | — | Pennsylvania |
| 35 | Edward Lubarski | 15 | Son | — | Pennsylvania |
| 36 | Genevieve Lubarski | 12 | Daughter | — | Pennsylvania |
| 37 | Edward Tokarski | 25 | Son in law | Truck Operator | Pennsylvania |
| 38 | Stella Tokarski | 22 | Daughter | — | Pennsylvania |
| 39 | Joseph A Okalkowski | 33 | Head | Chemist | Pennsylvania |
| 40 | Stella G Okalkowski | 27 | Wife | Nurse | 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)