RT
Ruth Thomas — 1940 US Census Record
Model Tree available1940 United States Federal Census · Allegheny-County, Pennsylvania
Our Model Tree links this Ruth Thomas across the 1900, 1910, 1920, 1930 and 1940 US Censuses in Allegheny-County, Pennsylvania (XGBoost, ~Confirmed), with identified parents Ida & Calvin — first a daughter (b.~1900), then head of a 3-person household.
Age 40
b. ~1900
Female
Daughter
Born: Pennsylvania
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Allegheny-County, Pennsylvania |
| Surname | Thomas |
| Given Name | Ruth |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 40 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Avalon Boro |
| 1935 Residence (County) | Allegheny |
| Additional Details | |
| Occupation | Stenographer |
| Industry | Electrical |
| Class of Worker | PW |
| Hours Worked | 42 |
| Income (1939) | 1650 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same Place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Occupation | Stenographer |
| Township / Ward | Avalon Boro |
| Est. Birth Year | ~1900 |
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 Ruth | Age | Birth yr |
|---|---|---|---|---|
| Ruth Thomas | Daughter | — | 40 | ~1900 |
| Edward Thomas | Head | — | 67 | ~1873 |
| Ida Thomas | Spouse | — | 69 | ~1871 |
Census Appearances
1900
Allegheny, Pennsylvania
Daughter, age 1
Allegheny, Pennsylvania · implied b. ~1899 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thomas |
| Given Name | Ruth E |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 0 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Birth Month | Aug |
| Birth Year | 1899 |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1910
Allegheny, Pennsylvania
Daughter, age 10
Allegheny, Pennsylvania · implied b. ~1900 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thomas |
| Given Name | Ruth E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1920
Allegheny, Pennsylvania
Daughter, age 20
Allegheny, Pennsylvania · implied b. ~1900 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thomas |
| Given Name | Ruth E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Occupation | Stenographer |
| Industry | Steel Works |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1930
Allegheny, Pennsylvania
Daughter, age 28
Allegheny, Pennsylvania · implied b. ~1902 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thomas |
| Given Name | Ruth |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 28 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Occupation | Stenographer |
| Industry | Electric Co |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Allegheny-County, Pennsylvania
Daughter, age 40
Allegheny-County, Pennsylvania · implied b. ~1900 — 3 household members
| Surname | Thomas |
| Given Name | Ruth |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 40 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Avalon Boro |
| 1935 Residence (County) | Allegheny |
| Occupation | Stenographer |
| Industry | Electrical |
| Class of Worker | PW |
| Hours Worked | 42 |
| Income (1939) | 1650 |
| 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 Ruth Thomas across 5 US Census years (1900, 1910, 1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Ida Thomas (~0.92 confidence) and father Calvin Thomas (~0.92 confidence) and mother Ida Thomas (~0.92 confidence) and mother Ida Thomas (~0.92 confidence) and mother Ida Thomas (~0.92 confidence) and father Edward Thomas (~0.92 confidence) and father Edwin Thomas (~0.92 confidence) and father Edward Thomas (~0.92 confidence). The pedigree spans 1 generation with 8 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Ida Thomas
b. ~1870
Source mother
● Household
· direct · ~0.92
Father
Calvin Thomas
b. ~1871
Source father
● Household
· direct · ~0.92
Mother
Ida Thomas
b. ~1871
Source mother
● Household
· direct · ~0.92
Mother
Ida Thomas
b. ~1871
Source mother
● Household
· direct · ~0.92
Mother
Ida Thomas
b. ~1871
Source mother
● Household
· direct · ~0.92
Father
Edward Thomas
b. ~1872
Source father
● Household
· direct · ~0.92
Father
Edwin Thomas
b. ~1873
Source father
● Household
· direct · ~0.92
Father
Edward Thomas
b. ~1873
Source father
● Household
· direct · ~0.92
This person
Anchor record
Ruth Thomas
Daughter · 1940 · age 40 · b. ~1900 · Pennsylvania
★ You are viewing this record
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
38 people indexed on this census page (nara:1940:m-t0627-03397-00198)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Reiner Reiner | 24 | Step | Salesman | Pennsylvania |
| 42 | Chuck Herbert | 21 | Step-son | Salesman | Pennsylvania |
| 44 | Edward J. Thomas | 67 | Head | — | Pennsylvania |
| 45 | Ida Thomas | 69 | Wife | — | Pennsylvania |
| 46 | Ruth Thomas THIS PERSON | 40 | Daughter | Stenographer | Pennsylvania |
| 47 | Charles F. Fleming | 54 | Head | Laborer | Germany |
| 48 | Minnie A. (X) Fleming | 45 | Wife | — | Pennsylvania |
| 49 | Elsie Fleming | 15 | Daughter | — | Pennsylvania |
| 50 | Dorothy Fleming | 13 | Daughter | — | Pennsylvania |
| 51 | Wesley D. (X) Kelley | 68 | Head | — | Pennsylvania |
| 52 | Elizabeth A. Kelley | 68 | Wife | — | Pennsylvania |
| 53 | John W. Kelley | 30 | Son | Cost Clerk | Pennsylvania |
| 54 | Ralph C. Kelley | 28 | Son | Salesman | Pennsylvania |
| 55 | Fred C. Wilson | 22 | Head | Salesman | Pennsylvania |
| 56 | Betty M. Wilson | 20 | Wife | — | Pennsylvania |
| 57 | Mary C. Wilson | 67 | Head | — | Pennsylvania |
| 58 | Margaret S. Wilson | 64 | Sister | — | Pennsylvania |
| 59 | Gilbert H. Tripp | 29 | Head | Welder | Pennsylvania |
| 60 | Mary Jane Tripp | 22 | Wife | — | Pennsylvania |
| 62 | Robert B. Henry | 38 | Head | Janitor | Ireland |
| 63 | Edith L. (X) Henry | 32 | Wife | — | Pennsylvania |
| 64 | Robert B. Jr. Henry | 7 | Son | — | Pennsylvania |
| 65 | James C. Henry | 4 | Son | — | Pennsylvania |
| 66 | Sarah A. Henderson | 70 | Mother-in-law | — | Ireland |
| 67 | Emma Heller | 73 | Roomer | — | Pennsylvania |
| 68 | Myrtie A. Wied | 74 | Head | — | Ohio |
| 69 | Minnie E. Wied | 49 | Daughter | Cashier | West Virginia |
| 70 | Harry S. Armstrong | 53 | Head | Laborer | Virginia |
| 71 | Goldie M. (X) Armstrong | 42 | Wife | — | Pennsylvania |
| 72 | Thomas Armstrong | 19 | Son | — | Pennsylvania |
| 73 | Nancy L. Armstrong | 9 | Daughter | — | Pennsylvania |
| 74 | Nannie W. Dalzell | 78 | Mother | — | Pennsylvania |
| 75 | James Dalzell | 77 | Uncle | — | Ireland |
| 76 | William Mcmurdy | 75 | Head | — | Arkansas |
| 77 | Lottie (X) Mcmurdy | 73 | Wife | — | Arkansas |
| 78 | Clara C. Mcmurdy | 36 | Daughter | Stenographer | Pennsylvania |
| 79 | William Ehrhart | 65 | Head | Conductor | Pennsylvania |
| 80 | Josephine (X) Ehrhart | 63 | Wife | — | Ohio |
Related Census Records
Pedigree Summary
Ruth
Gen 1 · 8 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)