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Mary Brock — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Grenada-County, Mississippi
Our Model Tree links this Mary Brock across the 1930 and 1940 US Censuses in Grenada-County, Mississippi (XGBoost, ~Confirmed) — first a spouse (b.~1904), then head of a 12-person household.
Age 36
b. ~1904
Female
Spouse
Born: Mississippi
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Grenada-County, Mississippi |
| Surname | Brock |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | Black |
| Age | 36 |
| Marital Status | Married |
| Birthplace | Mississippi |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Grenada |
| Additional Details | |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | NP |
| Hours Worked | 60 |
| Income (1939) | 0 |
| Highest Grade | No-2 |
| 1935 Residence | Mississippi |
| Birth State | Mississippi |
| Birth Country | United States |
| Birthplace (normalized) | mississippi |
| Occupation | Farmer |
| Township / Ward | Beat 4 |
| Est. Birth Year | ~1904 |
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.
12 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Ella Brock | Daughter | — | 9 | ~1931 |
| Mary Brock | Spouse | — | 36 | ~1904 |
| Mary Brock | Daughter | — | 15 | ~1925 |
| Ruby Brock | Daughter | — | 4 | ~1936 |
| Jake Brock | Head | — | 46 | ~1894 |
| Lillie Brock | Daughter | — | 18 | ~1922 |
| Janice Brock | Daughter | — | 12 | ~1928 |
| George Brock | Son | — | 8 | ~1932 |
| Lottie Brock | Daughter | — | 16 | ~1924 |
| Jeff Brock | Son | — | ~1940 | |
| Jerry Brock | Son | — | 6 | ~1934 |
| Jake Brock | Son | — | 11 | ~1929 |
Census Appearances
1930
Grenada, Mississippi
Other, age 25
Grenada, Mississippi · implied b. ~1905 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Brooks |
| Given Name | Mary |
| Relationship to Head | Wife-H |
| Sex | F |
| Color / Race | Black |
| Age | 25 |
| Marital Status | Married |
| Birthplace | Mississippi |
| Age at First Marriage | 15 |
| Father's Birthplace | Mississippi |
| Mother's Birthplace | Mississippi |
| Can Read/Write | Yes |
| Birth State | Mississippi |
| Birth Country | United States |
| Birthplace (normalized) | mississippi |
1940
Grenada-County, Mississippi
Spouse, age 36
Grenada-County, Mississippi · implied b. ~1904 — 12 household members
| Surname | Brock |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | Black |
| Age | 36 |
| Marital Status | Married |
| Birthplace | Mississippi |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Grenada |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | NP |
| Hours Worked | 60 |
| Income (1939) | 0 |
| Highest Grade | No-2 |
| 1935 Residence | Mississippi |
| Birth State | Mississippi |
| Birth Country | United States |
| Birthplace (normalized) | mississippi |
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 36 · b. ~1904 · Mississippi
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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 — Grenada-County, Mississippi
Open full size
1940 US Federal Census — Grenada-County, Mississippi
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02023-00430)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | E. D. Jones | 3 | Son | — | Mississippi |
| 2 | Hortence Jones | 1 | Daughter | — | Mississippi |
| 3 | Edward Jones | 30 | Head | Farm | Mississippi |
| 4 | Lucy Jones | 27 | Wife | Farm | Mississippi |
| 5 | Rabbit Lee Jones | 8 | Son | — | Mississippi |
| 6 | Russell Jones | 6 | Son | — | Mississippi |
| 7 | Harrison Jones | 5 | Son | — | Mississippi |
| 8 | Elizabeth Jones | 3 | Daughter | — | Mississippi |
| 9 | Claudie Jones | 2 | Son | — | Mississippi |
| 10 | Adam Jones | 27 | Head | Section Hand | Mississippi |
| 11 | Ester Jones | 23 | Wife | Farmer | Mississippi |
| 12 | Annie D. Jones | 21 | Step-in-law | Farmer | Mississippi |
| 13 | John Jones | 12 | Son | — | Mississippi |
| 14 | Glenora Jones | 11 | Daughter | — | Mississippi |
| 15 | Green D. Jones | 9 | Son | — | Mississippi |
| 16 | D. W. Jones | 3 | Son | — | Mississippi |
| 17 | Ernest Talbert | 22 | Head | Farmer | Mississippi |
| 18 | Lora Talbert | 18 | Wife | Farmer | Mississippi |
| 19 | Ernest Jr. Talbert | 2 | Son | — | Mississippi |
| 20 | Jake Brock | 46 | Head | Farmer | Mississippi |
| 21 | Mary Brock THIS PERSON | 36 | Wife | Farmer | Mississippi |
| 22 | Lillie B. Brock | 18 | Daughter | Farmer | Mississippi |
| 23 | Lottie Brock | 16 | Daughter | Farmer | Mississippi |
| 24 | Mary Lee Brock | 15 | Daughter | — | Mississippi |
| 25 | Janice Brock | 12 | Daughter | — | Mississippi |
| 26 | Jake Jr. Brock | 11 | Son | — | Mississippi |
| 27 | Ella Mae Brock | 9 | Daughter | — | Mississippi |
| 28 | George Brock | 8 | Son | — | Mississippi |
| 29 | Jerry Brock | 6 | Son | — | Mississippi |
| 30 | Ruby Dell Brock | 4 | Daughter | — | Mississippi |
| 31 | Jeff Brock | 0 | Son | — | Mississippi |
| 32 | Lizzie Kimball | 20 | Head | Farmer | Mississippi |
| 33 | Garfield Kimball | 1 | Son | — | Mississippi |
| 34 | Squire Lucas | 36 | Head | Farmer | Mississippi |
| 35 | Litton Lucas | 32 | Wife | Farmer | Mississippi |
| 36 | Louvenia Lucas | 13 | Daughter | — | Mississippi |
| 37 | Jessie Lucas | 31 | Head | Laborer | Mississippi |
| 38 | Roger Lee Lucas | 8 | Daughter | — | Mississippi |
| 39 | Joe Lucas | 7 | Son | — | Mississippi |
| 40 | Frank Lucas | 5 | Son | — | Mississippi |
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)