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Thelma Williams — 1940 US Census Record
Linked across censuses1940 United States Federal Census · York-County, South Carolina
Our Model Tree links this Thelma Williams across the 1930 and 1940 US Censuses in York-County, South Carolina (XGBoost, ~Confirmed) — first a daughter (b.~1925), then head of a 10-person household.
Age 15
b. ~1925
Female
Daughter
Born: South Carolina
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | York-County, South Carolina |
| Surname | Williams |
| Given Name | Thelma |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | South Carolina |
| 1935 Residence (City) | Rock Hill city |
| 1935 Residence (County) | York |
| Additional Details | |
| Highest Grade | 8 |
| 1935 Residence | Same Place |
| Birth State | South Carolina |
| Birth Country | United States |
| Birthplace (normalized) | south carolina |
| Township / Ward | Rock Hill City |
| Est. Birth Year | ~1925 |
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.
10 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Thelma | Age | Birth yr |
|---|---|---|---|---|
| Thelma Williams | Daughter | — | 15 | ~1925 |
| Kathleen Williams | Daughter | — | 20 | ~1920 |
| Charles Williams | Head | — | 51 | ~1889 |
| Robert Williams | Son | — | 10 | ~1930 |
| Leonard Williams | Son | — | 12 | ~1928 |
| Heyward Williams | Son | — | 6 | ~1934 |
| James Williams | Son | — | 17 | ~1923 |
| Richard Williams | Son | — | 8 | ~1932 |
| Charles Williams | Son | — | 22 | ~1918 |
| Mamie Williams | Spouse | — | 49 | ~1891 |
Census Appearances
1930
York, South …
Daughter, age 5
York, South Carolina · implied b. ~1925 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Williams |
| Given Name | Thelma |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | South Carolina |
| Father's Birthplace | North Carolina |
| Mother's Birthplace | North Carolina |
| Occupation | none |
| Birth State | South Carolina |
| Birth Country | United States |
| Birthplace (normalized) | south carolina |
1940
York-County, South …
Daughter, age 15
York-County, South Carolina · implied b. ~1925 — 10 household members
| Surname | Williams |
| Given Name | Thelma |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | South Carolina |
| 1935 Residence (City) | Rock Hill city |
| 1935 Residence (County) | York |
| Highest Grade | 8 |
| 1935 Residence | Same Place |
| Birth State | South Carolina |
| Birth Country | United States |
| Birthplace (normalized) | south carolina |
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 Williams across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Thelma Williams
Daughter · 1940 · age 15 · b. ~1925 · South Carolina
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Sibling
Robert Williams
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Charles Williams
Sibling · 1940 · age 22
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Williams
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Leonard Williams
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Kathleen Williams
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Richard Williams
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Heyward Williams
Sibling · 1940 · age 6
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 — York-County, South Carolina
Open full size
1940 US Federal Census — York-County, South Carolina
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-03845-00416)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | William L. Eubanks | 33 | Head | Detective | Virginia |
| 42 | William T. Allen | 31 | Head | Beer Salesman | South Carolina |
| 43 | Evelyn Allen | 33 | Wife | Telephone Operator | South Carolina |
| 44 | John C. Allen | 15 | Son | — | South Carolina |
| 45 | Kathleen Allen | 14 | Daughter | — | South Carolina |
| 46 | Bernie B. Dunlap | 30 | Head | Lawyer | South Carolina |
| 47 | W. R. (M. Name) Long | 32 | Head | Filling Station | South Carolina |
| 48 | Beulah R. Long | 32 | Wife | Telephone Operator | South Carolina |
| 49 | William Long | 9 | Son | — | South Carolina |
| 50 | Phillip Long | 5 | Son | — | South Carolina |
| 52 | Sidney M. Graves | 36 | Head | Shoe Repairing | South Carolina |
| 53 | Ethyle Graves | 30 | Wife | — | Oklahoma |
| 54 | Porter Lee Graves | 6 | Son | — | Oklahoma |
| 55 | Patricia Ann Graves | 5 | Daughter | — | South Carolina |
| 56 | Everett Porter | 24 | Brother-in-law | Printers Helper | Oklahoma |
| 57 | Myrtle Porter | 18 | Sister-in-law | Topper | Georgia |
| 58 | Milton W. Porter | 1 | Nephew | — | South Carolina |
| 59 | Flora Hull | 60 | Head | — | South Carolina |
| 60 | Louise Hull | 34 | Daughter | Stenographer | South Carolina |
| 61 | Josie Hull | 32 | Daughter | Office Helper | South Carolina |
| 62 | Frank J. Hull | 30 | Son | Salesman | South Carolina |
| 63 | Charles L. Williams | 51 | Head | Owner | South Carolina |
| 64 | Mamie Williams | 49 | Wife | — | South Carolina |
| 65 | Charles L. Jr. Williams | 22 | Son | Legger | South Carolina |
| 66 | Kathleen Williams | 20 | Daughter | Book-Keeper | South Carolina |
| 67 | James Williams | 17 | Son | Shoe Clerk | South Carolina |
| 68 | Thelma Williams THIS PERSON | 15 | Daughter | — | South Carolina |
| 69 | Leonard Williams | 12 | Son | — | South Carolina |
| 70 | Robert Williams | 10 | Son | — | South Carolina |
| 71 | Richard Williams | 8 | Son | — | South Carolina |
| 72 | Heyward Williams | 6 | Son | — | South Carolina |
| 73 | Aubrey C. Plexico | 24 | Head | Auto Salesman | South Carolina |
| 74 | Evelyn Plexico | 20 | Wife | Telephone Operator | South Carolina |
| 75 | William B. Ferguson | 44 | Head | Furniture Repair | South Carolina |
| 76 | Eunice P. Ferguson | 39 | Wife | Spinner | South Carolina |
| 77 | Dorothy Ferguson | 18 | Daughter | — | South Carolina |
| 78 | Mildred Ferguson | 13 | Daughter | — | North Carolina |
| 79 | Robert Ferguson | 10 | Son | — | South Carolina |
| 80 | W. Bryan Clinton | 42 | Head | Mail Carrier | South Carolina |
Related Census Records
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)