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Mary Brock — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Bell-County, Kentucky
Our Model Tree links this Mary Brock across the 1930 and 1940 US Censuses in Bell-County, Kentucky (XGBoost, ~Confirmed) — first a daughter (b.~1927), then head of a 12-person household.
Age 13
b. ~1927
Female
Daughter
Born: Kentucky
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Bell-County, Kentucky |
| Surname | Brock |
| Given Name | Mary |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Kentucky |
| 1935 Residence (County) | Bell |
| Additional Details | |
| Occupation | none |
| Industry | H |
| Class of Worker | 0 |
| Highest Grade | 0 |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
| Est. Birth Year | ~1927 |
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 |
|---|---|---|---|---|
| Rachel Brock | Daughter | — | 14 | ~1926 |
| Mitchel Brock | Head | — | 55 | ~1885 |
| Sarah Brock | Daughter | — | 11 | ~1929 |
| Jim Brock | Son | — | 2 | ~1938 |
| Clarence Brock | Other | — | 30 | ~1910 |
| John Brock | Son | — | 12 | ~1928 |
| Henry Brock | Son | — | 3 | ~1937 |
| Lige Brock | Son | — | 5 | ~1935 |
| Mary Brock | Daughter | — | 13 | ~1927 |
| Lucy Brock | Daughter | — | 9 | ~1931 |
| Lula Brock | Spouse | — | 31 | ~1909 |
| Jack Brock | Other | — | 32 | ~1908 |
Census Appearances
1930
Bell, Kentucky
Daughter, age 3
Bell, Kentucky · implied b. ~1927 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Brock |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | Kentucky |
| Father's Birthplace | Kentucky |
| Mother's Birthplace | Kentucky |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
1940
Bell-County, Kentucky
Daughter, age 13
Bell-County, Kentucky · implied b. ~1927 — 12 household members
| Surname | Brock |
| Given Name | Mary |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Kentucky |
| 1935 Residence (County) | Bell |
| Occupation | none |
| Industry | H |
| Class of Worker | 0 |
| Highest Grade | 0 |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
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.
Show:
This person
Anchor record
Mary Brock
Daughter · 1940 · age 13 · b. ~1927 · Kentucky
★ You are viewing this record
Sibling
Jim Brock
Sibling · 1940 · age 2
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lucy Brock
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Sarah Brock
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Henry Brock
Sibling · 1940 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Brock
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lige Brock
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Rachel Brock
Sibling · 1940 · age 14
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 — Bell-County, Kentucky
Open full size
1940 US Federal Census — Bell-County, Kentucky
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01279-00298)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Raymon Baker | 10 | grandson | — | Kentucky |
| 42 | Geneva Baker | 7 | granddaughter | — | Kentucky |
| 43 | Mitchel Brock | 55 | head | None | Kentucky |
| 44 | Lula Brock | 31 | wife | None | Kentucky |
| 45 | Rachel Brock | 14 | daughter | None | Kentucky |
| 46 | Mary Brock THIS PERSON | 13 | daughter | None | Kentucky |
| 47 | John Brock | 12 | son | — | Kentucky |
| 48 | Sarah Brock | 11 | daughter | — | Kentucky |
| 49 | Lucy Brock | 9 | daughter | — | Kentucky |
| 50 | Lige Brock | 5 | son | — | Kentucky |
| 51 | Henry Brock | 3 | son | — | Kentucky |
| 52 | Jim Brock | 2 | son | — | Kentucky |
| 53 | Clarence Brock | 30 | brother | None | Kentucky |
| 54 | Jack Brock | 32 | brother | None | Kentucky |
| 55 | Willie Baker | 30 | head | Coal Mining | Kentucky |
| 56 | Sadie Baker | 25 | wife | School | Kentucky |
| 57 | Willie Jean Baker | 1 | daughter | — | Kentucky |
| 58 | William Baker | 48 | head | None | Kentucky |
| 59 | Lucy Baker | 48 | wife | None | Kentucky |
| 60 | Reid Baker | 14 | son | None | Kentucky |
| 61 | Noah Baker | 10 | son | — | Kentucky |
| 62 | T. J. Baker | 9 | son | — | Kentucky |
| 63 | Wyatt Woodie | 26 | head | Coal Mining | Kentucky |
| 64 | Blanche Woodie | 27 | wife | None | Kentucky |
| 65 | Mary Woodie | 30 | sister | None | Kentucky |
| 66 | Noah Hendrickson | 36 | head | Coal Mining | Kentucky |
| 67 | Pearl Hendrickson | 26 | wife | None | Kentucky |
| 68 | Pauline Hendrickson | 7 | daughter | — | Kentucky |
| 69 | James Hendrickson | 6 | son | — | Kentucky |
| 70 | Dean Hendrickson | 4 | son | — | Kentucky |
| 71 | Mary Hendrickson | 1 | daughter | — | Kentucky |
| 72 | Blair Roark | 34 | head | Coal Mining | Kentucky |
| 73 | Nellie Roark | 33 | wife | None | Kentucky |
| 74 | Sarah Roark | 13 | daughter | — | Kentucky |
| 75 | Homer Roark | 9 | son | — | Kentucky |
| 76 | Cora Roark | 6 | daughter | — | Kentucky |
| 77 | Mabel Roark | 5 | daughter | — | Kentucky |
| 78 | Boyd Roark | 2 | son | — | Kentucky |
| 79 | Leila B. Roark | 1 | daughter | — | Kentucky |
| 80 | Philip Cox | 27 | head | None | Kentucky |
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)