MD
Mary Dennis — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Williamsburg-County, South Carolina
Our Model Tree links this Mary Dennis across the 1930 and 1940 US Censuses in Williamsburg-County, South Carolina (XGBoost, ~Confirmed) — first a spouse (b.~1898), then head of a 8-person household.
Age 42
b. ~1898
Female
Spouse
Born: South Carolina
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Williamsburg-County, South Carolina |
| Surname | Dennis |
| Given Name | Mary M. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | Black |
| Age | 42 |
| Marital Status | Married |
| Birthplace | South Carolina |
| 1935 Residence (City) | Sumter Township |
| 1935 Residence (County) | Williamsburg |
| Additional Details | |
| Highest Grade | No 7 |
| 1935 Residence | Same house |
| Birth State | South Carolina |
| Birth Country | United States |
| Birthplace (normalized) | south carolina |
| Township / Ward | Sumter Township |
| Est. Birth Year | ~1898 |
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 Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Dennis | Spouse | — | 42 | ~1898 |
| Lervin Dennis | Son | — | 16 | ~1924 |
| Willie Dennis | Son | — | 21 | ~1919 |
| Hoyt Dennis | Son | — | 9 | ~1931 |
| Millard Dennis | Son | — | 11 | ~1929 |
| Hagood Dennis | Son | — | 14 | ~1926 |
| Leo Dennis | Head | — | 42 | ~1898 |
| Catherine Dennis | Daughter | — | 12 | ~1928 |
Census Appearances
1930
Williamsburg, South …
Spouse, age 30
Williamsburg, South Carolina · implied b. ~1900 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Dennis |
| Given Name | Mary M. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | Black |
| Age | 30 |
| Marital Status | Married |
| Birthplace | South Carolina |
| Age at First Marriage | 21 |
| 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
Williamsburg-County, South …
Spouse, age 42
Williamsburg-County, South Carolina · implied b. ~1898 — 8 household members
| Surname | Dennis |
| Given Name | Mary M. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | Black |
| Age | 42 |
| Marital Status | Married |
| Birthplace | South Carolina |
| 1935 Residence (City) | Sumter Township |
| 1935 Residence (County) | Williamsburg |
| Highest Grade | No 7 |
| 1935 Residence | Same house |
| 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 Mary Dennis across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Dennis
Spouse · 1940 · age 42 · b. ~1898 · 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 — Williamsburg-County, South Carolina
Open full size
1940 US Federal Census — Williamsburg-County, South Carolina
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03844-00404)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Milly J. Kelly | 8 | Son | — | South Carolina |
| 42 | Lucile Kelly | 4 | Daughter | — | South Carolina |
| 43 | Pearline Kelly | 0 | Daughter | — | South Carolina |
| 44 | James Graham | 21 | Head | Farmer | South Carolina |
| 45 | Lurinel Graham | 20 | Wife | — | South Carolina |
| 46 | Mary A. Graham | 1 | Daughter | — | South Carolina |
| 47 | Hazel Tapper | 21 | Sister in law | Helper | South Carolina |
| 48 | Colie Brower | 19 | Head | Laborer | South Carolina |
| 49 | Mammie Brower | 19 | Wife | — | South Carolina |
| 50 | Hattie Moore | 65 | Head | — | South Carolina |
| 51 | Leo E. Dennis | 42 | Head | Farmer | South Carolina |
| 52 | Mary M. Dennis THIS PERSON | 42 | Wife | — | South Carolina |
| 53 | Willie B. Dennis | 21 | Son | Farmer | South Carolina |
| 54 | Lervin Jr. Dennis | 16 | Son | — | South Carolina |
| 55 | Hagood Dennis | 14 | Son | — | South Carolina |
| 56 | Catherine Dennis | 12 | Daughter | — | South Carolina |
| 57 | Millard Dennis | 11 | Son | — | South Carolina |
| 58 | Hoyt Dennis | 9 | Son | — | South Carolina |
| 59 | Johnson Brown | 42 | Head | Farmer | South Carolina |
| 60 | Lillian Brown | 35 | Wife | — | South Carolina |
| 61 | Jimmie Brown | 13 | Son | — | South Carolina |
| 62 | Billie Brown | 11 | Son | — | South Carolina |
| 63 | George W. Brown | 9 | Son | — | South Carolina |
| 64 | Mattie Brown | 6 | Son | — | South Carolina |
| 65 | Rosa L. Brown | 1 | Daughter | — | South Carolina |
| 66 | Archie P. Gray | 42 | Head | Farmer | South Carolina |
| 67 | Lutha J. Gray | 40 | Wife | — | South Carolina |
| 68 | Carlon Gray | 15 | Son | Helper | South Carolina |
| 69 | Fish R. Gray | 13 | Son | — | South Carolina |
| 70 | Mack Dozier | 43 | Lodger | Helper | South Carolina |
| 71 | Ira Gamble | 27 | Head | Farmer | South Carolina |
| 72 | Ealermay Gamble | 23 | Wife | — | South Carolina |
| 73 | Lewis Gamble | 5 | Son | — | South Carolina |
| 74 | Mattie B. Gamble | 3 | Daughter | — | South Carolina |
| 75 | Margie Gamble | 3 | Daughter | — | South Carolina |
| 76 | Linmond Gamble | 1 | Son | — | South Carolina |
| 77 | Sam Gamble | 37 | Head | Farmer | South Carolina |
| 78 | Lillie Gamble | 37 | Wife | — | South Carolina |
| 79 | Louise Gamble | 16 | Daughter | — | South Carolina |
| 80 | Belle Gamble | 15 | Daughter | — | 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)