JB
James Brock — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Harlan-County, Kentucky
Our Model Tree links this James Brock across the 1930 and 1940 US Censuses in Harlan-County, Kentucky (XGBoost, ~Confirmed) — first a son (b.~1926), then head of a 7-person household.
Age 14
b. ~1926
Male
Son
Born: Kentucky
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Harlan-County, Kentucky |
| Surname | Brock |
| Given Name | James Jr. |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Kentucky |
| 1935 Residence (City) | Mary Helen |
| 1935 Residence (County) | Harlan |
| Additional Details | |
| Class of Worker | 0 |
| Hours Worked | 0 |
| Highest Grade | No 7 |
| 1935 Residence | Same place |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
| Township / Ward | Mary Helen |
| Est. Birth Year | ~1926 |
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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to James | Age | Birth yr |
|---|---|---|---|---|
| Dorothy Brock | Daughter | — | 18 | ~1922 |
| James Brock | Head | — | 40 | ~1900 |
| Donald Brock | Son | — | 11 | ~1929 |
| James Brock | Son | — | 14 | ~1926 |
| Jayne Brock | Daughter | — | 8 | ~1932 |
| Bernice Brock | Daughter | — | 16 | ~1924 |
| Victoria Brock | Spouse | — | 40 | ~1900 |
Census Appearances
1930
Harlan, Kentucky
Son, age 4
Harlan, Kentucky · implied b. ~1926 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Brooks |
| Given Name | James Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | Kentucky |
| Father's Birthplace | Kentucky |
| Mother's Birthplace | Kentucky |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
1940
Harlan-County, Kentucky
Son, age 14
Harlan-County, Kentucky · implied b. ~1926 — 7 household members
| Surname | Brock |
| Given Name | James Jr. |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Kentucky |
| 1935 Residence (City) | Mary Helen |
| 1935 Residence (County) | Harlan |
| Class of Worker | 0 |
| Hours Worked | 0 |
| Highest Grade | No 7 |
| 1935 Residence | Same place |
| 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 James Brock across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
James Brock
Son · 1940 · age 14 · b. ~1926 · Kentucky
★ You are viewing this record
Sibling
Bernice Brock
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Donald Brock
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Dorothy Brock
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Jayne Brock
Sibling · 1940 · age 8
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 — Harlan-County, Kentucky
Open full size
1940 US Federal Census — Harlan-County, Kentucky
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01314-00832)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Hollons, Vera Hollors | 27 | daughter in law | — | Kentucky |
| 2 | George Hollors | 21 | son | Miner | Kentucky |
| 3 | Edith Hollors | 21 | daughter in law | — | Kentucky |
| 4 | Myrtle Hollors | 18 | Niece | — | Kentucky |
| 5 | James Brock | 40 | Head | Miner | Kentucky |
| 6 | Victoria Brock | 40 | Wife | — | Kentucky |
| 7 | Dorothy Brock | 18 | daughter | — | Kentucky |
| 8 | Bernice Brock | 16 | daughter | — | Kentucky |
| 9 | James Jr. Brock THIS PERSON | 14 | son | — | Kentucky |
| 10 | Donald Brock | 11 | son | — | Kentucky |
| 11 | Jayne Brock | 8 | daughter | — | Kentucky |
| 12 | Bill Lee | 32 | Head | Miner | Tennessee |
| 13 | Leila Lee | 32 | Wife | — | Tennessee |
| 14 | Betty Lee | 9 | daughter | — | Kentucky |
| 15 | Richard Lee | 8 | son | — | Kentucky |
| 16 | Robert Lee | 5 | son | — | Kentucky |
| 17 | Donald Lee | 2 | son | — | Kentucky |
| 18 | Junis Harber | 23 | Head | Miner | Virginia |
| 19 | Buena Harber | 18 | Wife | — | Tennessee |
| 20 | Patricia Harber | 1 | daughter | — | Kentucky |
| 21 | Curtis D. Owens | 30 | Head | Miner | Tennessee |
| 22 | Dorothy Owens | 29 | Wife | — | Kentucky |
| 23 | Kendall Owens | 10 | son | — | Kentucky |
| 24 | Phyllis Owens | 8 | daughter | — | Kentucky |
| 25 | Betty Owens | 5 | daughter | — | Kentucky |
| 26 | Noah Brock | 39 | Head | Miner | Kentucky |
| 27 | Bessie Brock | 33 | Wife | — | Kentucky |
| 28 | Clayton Brock | 10 | son | — | Kentucky |
| 29 | Franklin Brock | 4 | son | — | Kentucky |
| 30 | Noah Jr. Brock | 2 | son | — | Kentucky |
| 31 | Charles Lawson | 17 | step-son | Miner | Illinois |
| 32 | James Lawson | 15 | step-son | — | Illinois |
| 33 | Zonia Lawson | 13 | step-daughter | — | Illinois |
| 34 | Sam Drain | 43 | Head | Miner | Kentucky |
| 35 | Louise Drain | 39 | Wife | — | Kentucky |
| 36 | James Drain | 81 | Father | — | Kentucky |
| 37 | Elizabeth Drain | 75 | Mother | — | Kentucky |
| 38 | Lizzie Drain | 36 | sister | — | Kentucky |
| 39 | Herman Drain | 14 | nephew | — | Kentucky |
| 40 | Earl Jordan | 32 | Head | Miner | Tennessee |
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)