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John Brock — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Knox-County, Kentucky
Our Model Tree links this John Brock across the 1930 and 1940 US Censuses in Knox-County, Kentucky (XGBoost, ~Confirmed) — first a son (b.~1929), then head of a 8-person household.
Age 11
b. ~1929
Male
Son
Born: Kentucky
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Knox-County, Kentucky |
| Surname | Brock |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Kentucky |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Knox |
| Additional Details | |
| Highest Grade | S 4 |
| 1935 Residence | Kentucky |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
| Township / Ward | Magisterial District 1 |
| Est. Birth Year | ~1929 |
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 John | Age | Birth yr |
|---|---|---|---|---|
| George Brock | Head | — | 39 | ~1901 |
| Martha Brock | Daughter | — | 1 | ~1939 |
| Marshall Brock | Son | — | 8 | ~1932 |
| Frank Brock | Son | — | 15 | ~1925 |
| D Brock | Son | — | 7 | ~1933 |
| Pauline Brock | Daughter | — | 5 | ~1935 |
| John Brock | Son | — | 11 | ~1929 |
| Sudie Brock | Spouse | — | 32 | ~1908 |
Census Appearances
1930
Knox, Kentucky
Son, age 1
Knox, Kentucky · implied b. ~1929 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Brock |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Kentucky |
| Father's Birthplace | Kentucky |
| Mother's Birthplace | Kentucky |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
1940
Knox-County, Kentucky
Son, age 11
Knox-County, Kentucky · implied b. ~1929 — 8 household members
| Surname | Brock |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Kentucky |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Knox |
| Highest Grade | S 4 |
| 1935 Residence | Kentucky |
| 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 John Brock across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Brock
Son · 1940 · age 11 · b. ~1929 · Kentucky
★ You are viewing this record
Sibling
D Brock
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Martha Brock
Sibling · 1940 · age 1
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Marshall Brock
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Frank Brock
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Pauline Brock
Sibling · 1940 · age 5
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 — Knox-County, Kentucky
Open full size
1940 US Federal Census — Knox-County, Kentucky
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01326-00700)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Frank Price | 12 | Son | — | Kentucky |
| 42 | Clarence Sams | 26 | Head | School Teacher | Kentucky |
| 43 | Beatrice Sams | 25 | Wife | — | Kentucky |
| 44 | Dexter R. Sams | 1 | Son | — | Kentucky |
| 45 | Clarence Payne | 33 | Head | Bus Driver | Kentucky |
| 46 | Mary Payne | 35 | Wife | — | Kentucky |
| 47 | Clarence Jr. Payne | 13 | Son | — | Kentucky |
| 48 | Mildred P. Payne | 4 | Daughter | — | Kentucky |
| 49 | William Huddleston | 47 | Head | Superintendent | Kentucky |
| 50 | Otie Huddleston | 48 | Wife | — | Kentucky |
| 51 | Ethel Huddleston | 14 | Daughter | — | Kentucky |
| 52 | Ethel H. Bingham | 20 | Daughter | New Worker | Kentucky |
| 53 | Billy J. Bingham | 2 | Grandson | — | Kentucky |
| 54 | Marie Bingham | 0 | Granddaughter | — | Kentucky |
| 55 | Thomas Callahan | 46 | Head | Farmer | Kentucky |
| 56 | Sally Callahan | 46 | Wife | — | Kentucky |
| 57 | Will Powell | 53 | Head | Laborer | Kentucky |
| 58 | Julia Powell | 55 | Wife | — | Kentucky |
| 59 | Walter Powell | 19 | Son | — | Kentucky |
| 60 | Tip Powell | 9 | Son | — | Kentucky |
| 61 | Robert Callahan | 52 | Head | Farmer | Kentucky |
| 62 | Rosa Callahan | 42 | Wife | — | Kentucky |
| 63 | Victor Callahan | 28 | Son | New Worker | Kentucky |
| 64 | Homer Callahan | 21 | Son | New Worker | Kentucky |
| 65 | William Callahan | 11 | Son | — | Kentucky |
| 66 | Amanda Callahan | 5 | Daughter | — | Kentucky |
| 67 | George Brock | 39 | Head | Farmer | Kentucky |
| 68 | Sudie Brock | 32 | Wife | — | Kentucky |
| 69 | Frank Brock | 15 | Son | — | Kentucky |
| 70 | John Brock THIS PERSON | 11 | Son | — | Kentucky |
| 71 | Marshall Brock | 8 | Son | — | Kentucky |
| 72 | D. L. Brock | 7 | Son | — | Kentucky |
| 73 | Pauline Brock | 5 | Daughter | — | Kentucky |
| 74 | Martha Brock | 1 | Daughter | — | Kentucky |
| 75 | Darling Brock | 60 | Head | Farmer | Kentucky |
| 76 | Becky Brock | 63 | Wife | — | Kentucky |
| 77 | William Brock | 19 | Son | Laborer | Kentucky |
| 78 | S. M. Perkins | 67 | Head | Farmer | Tennessee |
| 79 | Lulu Perkins | 47 | Wife | — | Kentucky |
| 80 | Josephine Perkins | 10 | Daughter | — | Kentucky |
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)