LT
Lois Thompson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Allegheny-County, Pennsylvania
Our Model Tree links this Lois Thompson across the 1920, 1930 and 1940 US Censuses in Allegheny-County, Pennsylvania (XGBoost, ~Confirmed), with identified parents George & Carrie — first a daughter (b.~1917), then head of a 5-person household.
Age 23
b. ~1917
Female
Daughter
Born: Pennsylvania
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Allegheny-County, Pennsylvania |
| Surname | Thompson |
| Given Name | Lois |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Clairton City |
| 1935 Residence (County) | Allegheny |
| Additional Details | |
| Hours Worked | 0 |
| Income (1939) | 0 |
| Highest Grade | H-4 |
| 1935 Residence | Same Place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Township / Ward | Clairton City |
| Est. Birth Year | ~1917 |
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 Lois | Age | Birth yr |
|---|---|---|---|---|
| Phyllis Thompson | Daughter | — | 12 | ~1928 |
| Lois Thompson | Daughter | — | 23 | ~1917 |
| George Thompson | Head | — | 49 | ~1891 |
| Carrie Thompson | Spouse | — | 43 | ~1897 |
| George Thompson | Son | — | 20 | ~1920 |
Census Appearances
1920
Allegheny, Pennsylvania
Daughter, age 3
Allegheny, Pennsylvania · implied b. ~1917 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thompson |
| Given Name | Lois M |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Speaks English | none |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1930
Allegheny, Pennsylvania
Daughter, age 13
Allegheny, Pennsylvania · implied b. ~1917 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thompson |
| Given Name | Lois M. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Allegheny-County, Pennsylvania
Daughter, age 23
Allegheny-County, Pennsylvania · implied b. ~1917 — 5 household members
| Surname | Thompson |
| Given Name | Lois |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Clairton City |
| 1935 Residence (County) | Allegheny |
| Hours Worked | 0 |
| Income (1939) | 0 |
| Highest Grade | H-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 Lois Thompson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father George Thompson (~0.92 confidence) and mother Carrie Thompson (~0.92 confidence) and mother Carrie Thompson (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
George Thompson
b. ~1891
Source father
● Household
· direct · ~0.92
Mother
Carrie Thompson
b. ~1897
Source mother
● Household
· direct · ~0.92
Mother
Carrie Thompson
b. ~1897
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Lois Thompson
Daughter · 1940 · age 23 · b. ~1917 · Pennsylvania
★ You are viewing this record
Sibling
George Thompson
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Phyllis Thompson
Sibling · 1940 · age 12
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-t0627-03400-00625)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Florence Parks | 27 | Wife | — | Indiana |
| 42 | John Parks | 2 | Son | — | Indiana |
| 43 | Clinton Parks | 1 | Son | — | Indiana |
| 44 | Harold Hrynewich | 27 | Head | Clerk | Pennsylvania |
| 45 | Adelaide Hrynewich | 24 | Wife | — | Pennsylvania |
| 46 | James Hrynewich | 0 | Son | — | Pennsylvania |
| 47 | Henry R. Slater | 43 | Head | Laborer | Pennsylvania |
| 48 | Daisy Slater | 40 | Wife | — | Pennsylvania |
| 49 | William Slater | 20 | Son | Laborer | Pennsylvania |
| 50 | Robert Slater | 16 | Son | — | Pennsylvania |
| 51 | Dorothy Slater | 15 | Daughter | — | Pennsylvania |
| 52 | Vera Slater | 9 | Daughter | — | Pennsylvania |
| 53 | Thomas Curry | 38 | Head | Relief Foreman | Pennsylvania |
| 54 | Mildred Curry | 31 | Wife | — | Pennsylvania |
| 55 | Thomas Jr. Curry | 6 | Son | — | Pennsylvania |
| 56 | Maureen Curry | 1 | Daughter | — | Pennsylvania |
| 57 | Herman L. Clank | 52 | Head | Chemist | Pennsylvania |
| 58 | Katherine Clank | 52 | Wife | — | Pennsylvania |
| 59 | Herman C. Clank | 23 | Son | Druggist | Pennsylvania |
| 60 | Alida M. Clank | 22 | Daughter | Secretary | Pennsylvania |
| 61 | Norwood W. Clank | 20 | Son | Laborer | Pennsylvania |
| 62 | Mark E. Clank | 16 | Son | — | Pennsylvania |
| 63 | Melvin J. Clank | 9 | Son | — | Pennsylvania |
| 64 | James R. Gilchrist | 29 | Head | Asst. Gen. Accountant | Scotland |
| 65 | Stella Gilchrist | 26 | Wife | — | Pennsylvania |
| 66 | James Jr. Gilchrist | 1 | Son | — | Pennsylvania |
| 67 | Kenneth Knerr | 27 | Head | Lineman | Pennsylvania |
| 68 | Joan Knerr | 23 | Wife | — | Michigan |
| 69 | Rollin Knerr | 5 | Son | — | Pennsylvania |
| 70 | George Thompson | 49 | Head | Electrician | Pennsylvania |
| 71 | Carrie Thompson | 43 | Wife | — | Pennsylvania |
| 72 | Lois Thompson THIS PERSON | 23 | Daughter | — | Pennsylvania |
| 73 | George Thompson | 20 | Son | Laborer | Pennsylvania |
| 74 | Phyllis Thompson | 12 | Daughter | — | Pennsylvania |
| 75 | Miller Knerr | 30 | Head | Craneman | Pennsylvania |
| 76 | Mabel Knerr | 27 | Wife | — | Pennsylvania |
| 77 | Donald Knerr | 4 | Son | — | Pennsylvania |
| 78 | Willie Jr. Knerr | 1 | Son | — | Pennsylvania |
| 79 | John Marasity | 39 | Head | Boiler Maker | Pennsylvania |
| 80 | Blanche Marasity | 40 | Wife | — | Pennsylvania |
Pedigree Summary
Lois + 2 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)