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Mary Brock — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Clarendon-County, South Carolina
Our Model Tree links this Mary Brock across the 1930 and 1940 US Censuses in Clarendon-County, South Carolina (XGBoost, ~Confirmed) — first a spouse (b.~1900), then head of a 10-person household.
Age 40
b. ~1900
Female
Spouse
Born: South Carolina
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Clarendon-County, South Carolina |
| Surname | Brock |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | Black |
| Age | 40 |
| Marital Status | Married |
| Birthplace | South Carolina |
| 1935 Residence (City) | Santee |
| 1935 Residence (County) | Clarendon |
| Additional Details | |
| Occupation | Farm Help |
| Industry | Farm |
| Class of Worker | NP |
| Hours Worked | 55 |
| Income (1939) | 52 |
| Highest Grade | No 5 |
| 1935 Residence | Same place |
| Birth State | South Carolina |
| Birth Country | United States |
| Birthplace (normalized) | south carolina |
| Occupation | Farm Help |
| Township / Ward | Santee |
| Est. Birth Year | ~1900 |
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 Mary | Age | Birth yr |
|---|---|---|---|---|
| Neady Brock | Son | — | 12 | ~1928 |
| Hubert Brock | Son | — | 14 | ~1926 |
| Mary Brock | Spouse | — | 40 | ~1900 |
| Henry Brock | Son | — | 18 | ~1922 |
| Mailee Brock | Daughter | — | 10 | ~1930 |
| Liauttie Brock | Daughter | — | 5 | ~1935 |
| Cecil Brock | Daughter | — | 16 | ~1924 |
| Clara Brock | Daughter | — | 17 | ~1923 |
| Pauline Brock | Daughter | — | 8 | ~1932 |
| Hubert Brock | Head | — | 48 | ~1892 |
Census Appearances
1930
Clarendon, South …
Spouse, age 30
Clarendon, South Carolina · implied b. ~1900 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Brock |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | Black |
| Age | 30 |
| Marital Status | Married |
| Birthplace | South Carolina |
| Age at First Marriage | 15 |
| 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
Clarendon-County, South …
Spouse, age 40
Clarendon-County, South Carolina · implied b. ~1900 — 10 household members
| Surname | Brock |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | Black |
| Age | 40 |
| Marital Status | Married |
| Birthplace | South Carolina |
| 1935 Residence (City) | Santee |
| 1935 Residence (County) | Clarendon |
| Occupation | Farm Help |
| Industry | Farm |
| Class of Worker | NP |
| Hours Worked | 55 |
| Income (1939) | 52 |
| Highest Grade | No 5 |
| 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 Mary Brock across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Mary Brock
Spouse · 1940 · age 40 · b. ~1900 · 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 — Clarendon-County, South Carolina
Open full size
1940 US Federal Census — Clarendon-County, South Carolina
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03800-00863)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Vick Brock | 24 | Daughter | Farm Help | South Carolina |
| 42 | Alice Brock | 10 | Daughter | — | South Carolina |
| 43 | Nettie Brock | 18 | Son | Farm Hand | South Carolina |
| 44 | Marion Pearson | 45 | Head | Farmer | South Carolina |
| 45 | Mary Pearson | 24 | Wife | Farm Help | South Carolina |
| 46 | Richard Pearson | 19 | Son | Farm Help | South Carolina |
| 47 | Annie May Pearson | 15 | Daughter | Farm Help | South Carolina |
| 48 | Leroy Pearson | 12 | Son | — | South Carolina |
| 49 | Theodore Pearson | 9 | Son | — | South Carolina |
| 50 | Mack Pearson | 4 | Son | — | South Carolina |
| 51 | Eddie Pearson | 2 | Son | — | South Carolina |
| 52 | Mandi Lee Pearson | 2 | Daughter | — | South Carolina |
| 53 | Marion Eleany | 24 | Head | Farmer | South Carolina |
| 54 | Annie Eleany | 21 | Wife | Farm Help | South Carolina |
| 55 | Earnest Leary | 32 | Head | Farmer | South Carolina |
| 56 | Pearl Leary | 26 | Wife | Farm Help | South Carolina |
| 57 | Jessy Leary | 5 | Son | — | South Carolina |
| 58 | Hubert Brock | 48 | Head | Farmer | South Carolina |
| 59 | Mary Brock THIS PERSON | 40 | Wife | Farm Help | South Carolina |
| 60 | Henry Brock | 18 | Son | Farm Help | South Carolina |
| 61 | Clara Brock | 17 | Daughter | Farm Help | South Carolina |
| 62 | Cecil Brock | 16 | Daughter | Farm Help | South Carolina |
| 63 | Hubert Jr. Brock | 14 | Son | Farm Help | South Carolina |
| 64 | Neady Brock | 12 | Son | — | South Carolina |
| 65 | Mailee Brock | 10 | Daughter | — | South Carolina |
| 66 | Pauline Brock | 8 | Daughter | — | South Carolina |
| 67 | Liauttie Brock | 5 | Daughter | — | South Carolina |
| 68 | Wallie Clark | 25 | Head | Farmer | South Carolina |
| 69 | Earline Clark | 21 | Wife | Farmer | Virginia |
| 70 | Hennie Clark | 3 | Son | — | South Carolina |
| 71 | Hans Dene Clark | 1 | Daughter | — | South Carolina |
| 72 | Elijah Mack | 45 | Head | Farmer | South Carolina |
| 73 | Alice Mack | 39 | Wife | Farm Help | South Carolina |
| 74 | Harid Mack | 18 | Daughter | Farm Help | South Carolina |
| 75 | Enane Mack | 16 | Son | Farmer | South Carolina |
| 76 | Lucill Mack | 14 | Daughter | Farm Help | South Carolina |
| 77 | James Mack | 11 | Son | — | South Carolina |
| 78 | Joseph Mack | 8 | Son | — | South Carolina |
| 79 | Isaac Eleany | 62 | Head | Farmer | South Carolina |
| 80 | Ellen Eleany | 40 | Wife | Farm Help | 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)