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Isaac Williams — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Charleston-County, South Carolina
Our Model Tree links this Isaac Williams across the 1920, 1930 and 1940 US Censuses in Charleston-County, South Carolina (XGBoost, ~Confirmed) — first a head (b.~1894), then head of a 9-person household.
Age 46
b. ~1894
Male
Head
Born: South Carolina
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Charleston-County, South Carolina |
| Surname | Williams |
| Given Name | Isaac |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | Black |
| Age | 46 |
| Marital Status | Married |
| Birthplace | South Carolina |
| 1935 Residence (City) | Charleston City |
| 1935 Residence (County) | Charleston |
| Additional Details | |
| Occupation | Attendant |
| Industry | Filling Station |
| Class of Worker | PW |
| Hours Worked | 65 |
| Income (1939) | 100 |
| Highest Grade | No 2 |
| 1935 Residence | Same place |
| Birth State | South Carolina |
| Birth Country | United States |
| Birthplace (normalized) | south carolina |
| Occupation | Attendant |
| Township / Ward | Charleston City |
| Est. Birth Year | ~1894 |
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.
9 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Isaac | Age | Birth yr |
|---|---|---|---|---|
| Lillian Williams | Daughter | — | 22 | ~1918 |
| Rosalee Williams | Daughter | — | 1 | ~1939 |
| Isabella Williams | Daughter | — | 3 | ~1937 |
| Sara Williams | Daughter | — | 5 | ~1935 |
| Isaac Williams | Head | — | 46 | ~1894 |
| Isaac Williams | Son | — | 21 | ~1919 |
| Richard Williams | Son | — | 9 | ~1931 |
| Arthur Williams | Son | — | 12 | ~1928 |
| Rosa Williams | Spouse | — | 35 | ~1905 |
Census Appearances
1920
Charleston, South …
Head, age 26
Charleston, South Carolina · implied b. ~1894 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Williams |
| Given Name | Isaac |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | Black |
| Age | 26 |
| Marital Status | Married |
| Birthplace | South Carolina |
| Father's Birthplace | South Carolina |
| Mother's Birthplace | South Carolina |
| Occupation | Farmer |
| Industry | General farm |
| Class of Worker | OA |
| Can Read | No |
| Can Write | No |
| Speaks English | No |
| Home Owned/Rented | O |
| Home Free/Mortgaged | M |
| Birth State | South Carolina |
| Birth Country | United States |
| Birthplace (normalized) | south carolina |
1930
Charleston, South …
Head, age 37
Charleston, South Carolina · implied b. ~1893 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Williams |
| Given Name | Isaac |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | Black |
| Age | 37 |
| Marital Status | Married |
| Birthplace | South Carolina |
| Age at First Marriage | 36 |
| Father's Birthplace | South Carolina |
| Mother's Birthplace | South Carolina |
| Occupation | Farmer |
| Industry | Truck Farm |
| Class of Worker | O |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Birth State | South Carolina |
| Birth Country | United States |
| Birthplace (normalized) | south carolina |
1940
Charleston-County, South …
Head, age 46
Charleston-County, South Carolina · implied b. ~1894 — 9 household members
| Surname | Williams |
| Given Name | Isaac |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | Black |
| Age | 46 |
| Marital Status | Married |
| Birthplace | South Carolina |
| 1935 Residence (City) | Charleston City |
| 1935 Residence (County) | Charleston |
| Occupation | Attendant |
| Industry | Filling Station |
| Class of Worker | PW |
| Hours Worked | 65 |
| Income (1939) | 100 |
| Highest Grade | No 2 |
| 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 Isaac Williams across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Isaac Williams
Head · 1940 · age 46 · b. ~1894 · South Carolina
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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-t0627-03794-01082)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | William Wright | 29 | Head | Employed | South Carolina |
| 42 | Gloria Wright | 17 | Wife | — | South Carolina |
| 43 | Isaac Wilson | 64 | Head | Laundress | South Carolina |
| 44 | Susanne Wilson | 14 | Wife | — | South Carolina |
| 45 | Ethel Duffy | 33 | Head | Dressmaker | South Carolina |
| 46 | Robert Duffy | 19 | Son | — | South Carolina |
| 47 | Harry Lorraine | 18 | Head | — | South Carolina |
| 48 | Jane Lorraine | 48 | Mother | — | South Carolina |
| 49 | Mattie Simons | 32 | Head | Maid | South Carolina |
| 50 | Marie Simons | 16 | Daughter | — | South Carolina |
| 51 | Stora Simons | 14 | Daughter | — | South Carolina |
| 52 | Henry Simons | 13 | Son | — | South Carolina |
| 53 | Isaac Randolph | 18 | Nephew | — | South Carolina |
| 54 | Isaac Morrow | 55 | Head | Laborer | South Carolina |
| 55 | Mary Morrow | 50 | Wife | Laundress | South Carolina |
| 56 | Eliza Robertson | 40 | Sister | — | South Carolina |
| 57 | E. Mae Robertson | 10 | Niece | — | South Carolina |
| 58 | Robert Geddes | 63 | Head | Janitor | South Carolina |
| 59 | Mamie Geddes | 58 | Wife | Teacher | South Carolina |
| 60 | Walker Fields | 49 | Head | Carpenter | South Carolina |
| 61 | Cornelia Fields | 43 | Wife | — | South Carolina |
| 62 | Lucille Fields | 26 | Daughter | — | South Carolina |
| 63 | Anthony Walker | 68 | Head | — | South Carolina |
| 64 | Lillie Walker | 40 | Wife | — | South Carolina |
| 65 | Dorothy Walker | 19 | Daughter | — | South Carolina |
| 66 | Lillian Walker | 17 | Daughter | — | South Carolina |
| 67 | Line Extra | None | — | — | — |
| 68 | Line Extra | None | — | — | — |
| 69 | Line Extra | None | — | — | — |
| 70 | Isaac Williams THIS PERSON | 46 | Head | Attendant | South Carolina |
| 71 | Rosa Williams | 35 | Wife | Maid | South Carolina |
| 72 | Lillian Williams | 22 | Daughter | — | South Carolina |
| 73 | Isaac Williams | 21 | Son | — | South Carolina |
| 74 | Arthur Williams | 12 | Son | — | South Carolina |
| 75 | Richard Williams | 9 | Son | — | South Carolina |
| 76 | Isabella Williams | 3 | Daughter | — | South Carolina |
| 77 | Sara Ann Williams | 5 | Daughter | — | South Carolina |
| 78 | Rosalee Williams | 1 | Daughter | — | South Carolina |
| 79 | Joseph Beaser | 50 | Head | — | South Carolina |
| 80 | Emma Beaser | 46 | Wife | — | South Carolina |
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)