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Robert Williams — 1940 US Census Record
Model Tree available1940 United States Federal Census · Charleston-County, South Carolina
Our Model Tree links this Robert Williams across the 1920, 1930 and 1940 US Censuses in Charleston-County, South Carolina (XGBoost, ~Confirmed), with identified parents Isaac & Abraham — first a son (b.~1916), then head of a 8-person household.
Age 24
b. ~1916
Male
Son
Born: South Carolina
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Charleston-County, South Carolina |
| Surname | Williams |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 24 |
| Marital Status | Single |
| Birthplace | South Carolina |
| 1935 Residence (City) | St. James Santee |
| 1935 Residence (County) | Charleston |
| Additional Details | |
| Occupation | unskilled laborer |
| Industry | River Road W.P.A. Project |
| Class of Worker | GW |
| Hours Worked | 30 |
| Income (1939) | 225 |
| Highest Grade | No 6 |
| 1935 Residence | Same place |
| Birth State | South Carolina |
| Birth Country | United States |
| Birthplace (normalized) | south carolina |
| Occupation | Unskilled Laborer |
| Township / Ward | St James Santee |
| Est. Birth Year | ~1916 |
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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Robert | Age | Birth yr |
|---|---|---|---|---|
| Lettie Williams | Daughter | — | 19 | ~1921 |
| Rebecca Williams | Daughter | — | 16 | ~1924 |
| Mary Williams | Daughter | — | 10 | ~1930 |
| Quinnie Williams | Head | — | 56 | ~1884 |
| Celia Williams | Other | — | 23 | ~1917 |
| David Williams | Other | — | 13 | ~1927 |
| James Williams | Son | — | 17 | ~1923 |
| Robert Williams | Son | — | 24 | ~1916 |
Census Appearances
1920
Charleston, South …
Son, age 5
Charleston, South Carolina · implied b. ~1915 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Williams |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 5 |
| Marital Status | Single |
| Birthplace | South Carolina |
| Father's Birthplace | South Carolina |
| Mother's Birthplace | South Carolina |
| Birth State | South Carolina |
| Birth Country | United States |
| Birthplace (normalized) | south carolina |
1930
Charleston, South …
Son, age 14
Charleston, South Carolina · implied b. ~1916 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Williams |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 14 |
| Marital Status | Single |
| Birthplace | South Carolina |
| Father's Birthplace | South Carolina |
| Mother's Birthplace | South Carolina |
| Can Read/Write | Yes |
| Birth State | South Carolina |
| Birth Country | United States |
| Birthplace (normalized) | south carolina |
1940
Charleston-County, South …
Son, age 24
Charleston-County, South Carolina · implied b. ~1916 — 8 household members
| Surname | Williams |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 24 |
| Marital Status | Single |
| Birthplace | South Carolina |
| 1935 Residence (City) | St. James Santee |
| 1935 Residence (County) | Charleston |
| Occupation | unskilled laborer |
| Industry | River Road W.P.A. Project |
| Class of Worker | GW |
| Hours Worked | 30 |
| Income (1939) | 225 |
| Highest Grade | No 6 |
| 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 Robert Williams across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Isaac Williams (~0.92 confidence) and father Abraham Williams (~0.92 confidence) and mother Louie Williams (~0.92 confidence) and mother Quinnie Williams (~0.92 confidence) and mother Sarah Williams (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Isaac Williams
b. ~1876
Source father
● Household
· direct · ~0.92
Father
Abraham Williams
b. ~1876
Source father
● Household
· direct · ~0.92
Mother
Louie Williams
b. ~1903
Source mother
● Household
· direct · ~0.92
Mother
Quinnie Williams
b. ~1884
Source mother
● Household
· direct · ~0.92
Mother
Sarah Williams
b. ~1875
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Robert Williams
Son · 1940 · age 24 · b. ~1916 · South Carolina
★ You are viewing this record
Sibling
Mary Williams
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Rebecca Williams
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lettie Williams
Sibling · 1940 · age 19
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
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Charleston-County, South Carolina
Open full size
1940 US Federal Census — Charleston-County, South Carolina
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03796-00256)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Margaret Young | 17 | Daughter | Shucker | South Carolina |
| 2 | Edward Young | 14 | Son | — | South Carolina |
| 3 | Anna Lee Young | 12 | Daughter | — | South Carolina |
| 4 | Nortas Young | 10 | Son | — | South Carolina |
| 5 | Josephine Young | 8 | Daughter | — | South Carolina |
| 6 | Alfreda Young | 6 | Daughter | — | South Carolina |
| 7 | John Young | 27 | Son | Laborer | South Carolina |
| 8 | Margaret Young | 18 | Daughter | — | South Carolina |
| 9 | Rosa Lee Young | 13 | Daughter | — | South Carolina |
| 10 | Elizabeth Cozman | 60 | Head | — | South Carolina |
| 11 | Alex Cozman | 38 | Son | Unskilled Laborer | South Carolina |
| 12 | Rosa Cozman | 20 | Daughter | — | South Carolina |
| 13 | Brown David Cozman | 3 | Adopted | — | South Carolina |
| 14 | Quinnie Williams | 56 | Head | Farmer | South Carolina |
| 15 | Lettie Williams | 19 | Daughter | — | South Carolina |
| 16 | Rebecca Williams | 16 | Daughter | Shucker | South Carolina |
| 17 | James A. Williams | 17 | Son | Laborer | South Carolina |
| 18 | Robert Williams THIS PERSON | 24 | Son | Unskilled Laborer | South Carolina |
| 19 | Celia Williams | 23 | Daughter-in-law | Shucker | South Carolina |
| 20 | David Williams | 13 | Grandson | — | South Carolina |
| 21 | Mary Williams | 10 | Daughter | — | South Carolina |
| 22 | Marion Williams | 36 | Head | Unskilled Laborer | South Carolina |
| 23 | Hannah Williams | 35 | Wife | Shucker | South Carolina |
| 24 | Louis Williams | 8 | Son | — | South Carolina |
| 25 | Richard Williams | 5 | Son | — | South Carolina |
| 26 | Marion Jr. Williams | 2 | Son | — | South Carolina |
| 27 | Ben Alston | 29 | Head | Unskilled Laborer | South Carolina |
| 28 | Rosa Lee Alston | 25 | Wife | — | South Carolina |
| 29 | Evelyn Alston | 6 | Daughter | — | South Carolina |
| 30 | Isaac Cozman | 22 | Head | Truck Driver | South Carolina |
| 31 | Tizan Cozman | 19 | Wife | Shucker | South Carolina |
| 32 | Isaac Jr. Cozman | 3 | Son | — | South Carolina |
| 33 | Eutill Cottle | 35 | Head | Farm Laborer | South Carolina |
| 34 | Henry Cottle | 20 | Son | Farm Laborer | South Carolina |
| 35 | Joseph A. Cottle | 16 | Son | — | South Carolina |
| 36 | James Cottle | 14 | Son | — | South Carolina |
| 37 | Eugene Cottle | 6 | Son | — | South Carolina |
| 38 | George Cottle | 27 | Head | Unskilled Laborer | South Carolina |
| 39 | Victoria Cottle | 24 | Wife | — | South Carolina |
| 40 | Anna Marie Cottle | 11 | Daughter | — | South Carolina |
Pedigree Summary
Robert + 4 siblings
Gen 1 · 5 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)