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Thelma Harris — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Allegheny-County, Pennsylvania
Our Model Tree links this Thelma Harris across the 1930 and 1940 US Censuses in Allegheny-County, Pennsylvania (XGBoost, ~Confirmed) — first a daughter (b.~1928), then head of a 11-person household.
Age 12
b. ~1928
Female
Daughter
Born: Pennsylvania
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Allegheny-County, Pennsylvania |
| Surname | Harris |
| Given Name | Thelma |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Pittsburgh |
| 1935 Residence (County) | Allegheny |
| Additional Details | |
| Highest Grade | 7 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Township / Ward | Pittsburgh |
| Est. Birth Year | ~1928 |
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.
11 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Thelma | Age | Birth yr |
|---|---|---|---|---|
| Thelma Harris | Daughter | — | 12 | ~1928 |
| Mack Harris | Son | — | 3 | ~1937 |
| Lily Harris | Spouse | — | 35 | ~1905 |
| Alfreda Harris | Daughter | — | 14 | ~1926 |
| Jack Harris | Head | — | 40 | ~1900 |
| Edward Harris | Son | — | 1 | ~1939 |
| Mary Harris | Daughter | — | 13 | ~1927 |
| Mamie Harris | Daughter | — | 16 | ~1924 |
| Ida Harris | Daughter | — | 9 | ~1931 |
| John Harris | Son | — | 8 | ~1932 |
| Shirley Harris | Daughter | — | 5 | ~1935 |
Census Appearances
1930
Allegheny, Pennsylvania
Daughter, age 2
Allegheny, Pennsylvania · implied b. ~1928 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Harris |
| Given Name | Thomasina |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | South Carolina |
| Mother's Birthplace | South Carolina |
| Occupation | none |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Allegheny-County, Pennsylvania
Daughter, age 12
Allegheny-County, Pennsylvania · implied b. ~1928 — 11 household members
| Surname | Harris |
| Given Name | Thelma |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Pittsburgh |
| 1935 Residence (County) | Allegheny |
| Highest Grade | 7 |
| 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 Thelma Harris across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Thelma Harris
Daughter · 1940 · age 12 · b. ~1928 · Pennsylvania
★ You are viewing this record
Sibling
Shirley Harris
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mack Harris
Sibling · 1940 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Harris
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Edward Harris
Sibling · 1940 · age 1
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Harris
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mamie Harris
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ida Harris
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Alfreda Harris
Sibling · 1940 · age 14
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-t0627-03652-00920)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Robert Clarke | 44 | Head | — | Alabama |
| 42 | Virginia Clarke | 41 | Wife | — | Alabama |
| 43 | James Clarke | 16 | Son | — | Pennsylvania |
| 44 | Virginia Clarke | 14 | Daughter | — | Pennsylvania |
| 45 | Frank Clarke | 12 | Son | — | Pennsylvania |
| 46 | Mary Clarke | 9 | Daughter | — | Pennsylvania |
| 47 | Herbert Clarke | 7 | Son | — | Pennsylvania |
| 48 | Mamie Clarke | 7 | Daughter | — | Pennsylvania |
| 49 | Isaac Clarke | 3 | Son | — | Pennsylvania |
| 50 | William Clarke | 20 | Son | Clerk | Kentucky |
| 51 | Juanita Clarke | 17 | In law | — | Pennsylvania |
| 52 | Marcia Clarke | 1 | Grandson | — | Pennsylvania |
| 53 | Jack Harris | 40 | Head | Laborer | Georgia |
| 54 | Lily Mae Harris | 35 | Wife | — | Georgia |
| 55 | Mamie Lou Harris | 16 | Daughter | — | Illinois |
| 56 | Alfreda Harris | 14 | Daughter | — | Illinois |
| 57 | Mary Louise Harris | 13 | Daughter | — | Pennsylvania |
| 58 | Thelma Harris THIS PERSON | 12 | Daughter | — | Pennsylvania |
| 59 | Ida May Harris | 9 | Daughter | — | Pennsylvania |
| 60 | John Harris | 8 | Son | — | Pennsylvania |
| 61 | Shirley Harris | 5 | Daughter | — | Pennsylvania |
| 62 | Mack Harris | 3 | Son | — | Pennsylvania |
| 63 | Edward Harris | 1 | Son | — | Pennsylvania |
| 64 | Sam Loan | 48 | Head | Laborer | Georgia |
| 65 | Isaac Anderson | 32 | Lodger | Maid | South Carolina |
| 66 | Rose Lowell | 27 | Head | — | Alabama |
| 67 | Alex South | 47 | Head | — | Alabama |
| 68 | Beulah South | 40 | Wife | — | Alabama |
| 69 | Alex South | 16 | Son | — | Pennsylvania |
| 70 | Martha South | 13 | Daughter | — | Pennsylvania |
| 71 | Carl South | 11 | Son | — | Pennsylvania |
| 72 | Walter South | 10 | Son | — | Pennsylvania |
| 73 | Arthur South | 22 | Son | Miner | Pennsylvania |
| 74 | Hattie South | 20 | Daughter in law | — | Pennsylvania |
| 75 | Ulysses South | 1 | Son | — | Pennsylvania |
| 76 | Anthony South | 1 | Grandson | — | Pennsylvania |
| 77 | Philip Turner | 24 | Lodger | — | Alabama |
| 78 | Robert Donald | 24 | Lodger | Laborer | Virginia |
| 79 | Ruth Donald | 20 | Lodger | — | Alabama |
| 80 | Manuel Griffin | 26 | Head | Miner | Alabama |
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)