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James Brock — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Jefferson-County, Kentucky
Our Model Tree links this James Brock across the 1930 and 1940 US Censuses in Jefferson-County, Kentucky (XGBoost, ~Confirmed) — first a son (b.~1930), then head of a 6-person household.
Age 10
b. ~1930
Male
Son
Born: Kentucky
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Jefferson-County, Kentucky |
| Surname | Brock |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Kentucky |
| 1935 Residence (City) | Louisville City |
| 1935 Residence (County) | Jefferson |
| Additional Details | |
| Highest Grade | No 3 |
| 1935 Residence | Same place |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
| Township / Ward | Louisville City |
| Est. Birth Year | ~1930 |
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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to James | Age | Birth yr |
|---|---|---|---|---|
| Helen Brock | Daughter | — | 6 | ~1934 |
| Emma Brock | Daughter | — | 9 | ~1931 |
| James Brock | Son | — | 10 | ~1930 |
| Mildred Brock | Daughter | — | 15 | ~1925 |
| Harry Brock | Head | — | 61 | ~1879 |
| Lucy Brock | Spouse | — | 43 | ~1897 |
Census Appearances
1930
Jefferson, Kentucky
Son, age 1
Jefferson, Kentucky · implied b. ~1929 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Brooke |
| Given Name | James H |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Kentucky |
| Father's Birthplace | Kentucky |
| Mother's Birthplace | Kentucky |
| Occupation | none |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
1940
Jefferson-County, Kentucky
Son, age 10
Jefferson-County, Kentucky · implied b. ~1930 — 6 household members
| Surname | Brock |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Kentucky |
| 1935 Residence (City) | Louisville City |
| 1935 Residence (County) | Jefferson |
| Highest Grade | No 3 |
| 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 10 · b. ~1930 · Kentucky
★ You are viewing this record
Sibling
Mildred Brock
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Emma Brock
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Helen Brock
Sibling · 1940 · age 6
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 — Jefferson-County, Kentucky
Open full size
1940 US Federal Census — Jefferson-County, Kentucky
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01367-00208)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Ella May Oderay | 6 | daughter | 0 | Kentucky |
| 2 | Elizabeth Oderay | 4 | daughter | 0 | Kentucky |
| 3 | Hallie Oderay | 2 | daughter | 0 | Kentucky |
| 4 | Annie Louise Harris | 28 | Step daughter | Servant | Kentucky |
| 5 | Thomas Harris | 22 | Step son | Laborer | Kentucky |
| 6 | Christopher Harris | 18 | Step son | Porter | Kentucky |
| 7 | Richard Harris | 16 | Step son | New Worker | Kentucky |
| 8 | George Harris | 14 | Step son | — | Kentucky |
| 9 | George Oliver | 44 | Head | Porter | Kentucky |
| 10 | Amanda Oliver | 31 | Wife | — | Indiana |
| 11 | Nadine Oliver | 12 | daughter | — | Indiana |
| 12 | Dorothy Oliver | 11 | daughter | — | Indiana |
| 13 | George, Jr. Oliver | 8 | Son | — | Kentucky |
| 14 | Charles Oliver | 5 | Son | — | Kentucky |
| 15 | Lee Oliver | 2 | Son | — | Kentucky |
| 16 | George Long | 49 | Head | Laborer | Tennessee |
| 17 | Fannie Long | 16 | daughter | — | Kentucky |
| 18 | George Long | 14 | Son | — | Kentucky |
| 19 | John Neil | 25 | Brother in law | Laborer | Kentucky |
| 20 | Harry Brock | 61 | Head | Dairy Man | Kentucky |
| 21 | Lucy Brock | 43 | Wife | — | Kentucky |
| 22 | Mildred Brock | 15 | daughter | — | Kentucky |
| 23 | James Brock THIS PERSON | 10 | Son | — | Kentucky |
| 24 | Emma Brock | 9 | daughter | — | Kentucky |
| 25 | Helen Brock | 6 | daughter | — | Kentucky |
| 26 | Sam Davis | 50 | Head | Laborer | Kentucky |
| 27 | Mary Davis | 41 | Wife | — | Kentucky |
| 28 | John M Davis | 12 | Son | — | Kentucky |
| 29 | Ann Davis | 10 | daughter | — | Kentucky |
| 30 | Martha Davis | 8 | daughter | — | Kentucky |
| 31 | Edna Davis | 7 | daughter | — | Kentucky |
| 32 | Lester Harris | 45 | Head | — | Kentucky |
| 33 | Alice Harris | 45 | Wife | — | Kentucky |
| 34 | William Blesser | 40 | Head | Chauffeur | Kentucky |
| 35 | Ava Blesser | 27 | Wife | — | Kentucky |
| 36 | Mattie Blesser | 9 | daughter | — | Kentucky |
| 37 | Lester Blesser | 18 | Son | Finisher, Concrete | Kentucky |
| 38 | Margaret Blesser | 15 | daughter | — | Kentucky |
| 39 | George Blesser | 5 | Son | — | Kentucky |
| 40 | Albert Blesser | 3 | Son | — | 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)