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Mary Brock — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Jefferson-County, Kentucky
Our Model Tree links this Mary Brock across the 1930 and 1940 US Censuses in Jefferson-County, Kentucky (XGBoost, ~Confirmed) — first a daughter (b.~1928), then head of a 7-person household.
Age 12
b. ~1928
Female
Daughter
Born: Kentucky
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Jefferson-County, Kentucky |
| Surname | Brock |
| Given Name | Mary H |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Kentucky |
| 1935 Residence (City) | Loyall |
| 1935 Residence (County) | Harlan |
| Additional Details | |
| Highest Grade | Yes 5 |
| 1935 Residence | Kentucky |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
| Township / Ward | Louisville City |
| Est. Birth Year | ~1928 |
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 Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Brock | Daughter | — | 12 | ~1928 |
| Leon Brock | Son | — | 15 | ~1925 |
| James Brock | Head | — | 38 | ~1902 |
| Bessie Brock | Spouse | — | 34 | ~1906 |
| Grace Brock | Daughter | — | 14 | ~1926 |
| Wilma Brock | Daughter | — | 7 | ~1933 |
| Ethie Brock | Son | — | 9 | ~1931 |
Census Appearances
1930
Jefferson, Kentucky
Daughter, age 2
Jefferson, Kentucky · implied b. ~1928 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Brooks |
| Given Name | Mary E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 2 |
| 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
Daughter, age 12
Jefferson-County, Kentucky · implied b. ~1928 — 7 household members
| Surname | Brock |
| Given Name | Mary H |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Kentucky |
| 1935 Residence (City) | Loyall |
| 1935 Residence (County) | Harlan |
| Highest Grade | Yes 5 |
| 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 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 12 · b. ~1928 · Kentucky
★ You are viewing this record
Sibling
Wilma Brock
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ethie Brock
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Grace Brock
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Leon Brock
Sibling · 1940 · age 15
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-t0627-01372-00375)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Edward J Smith | 41 | Head | Private Driver | Kentucky |
| 42 | Hattie B Smith | 40 | Wife | Weigh Checker | Kentucky |
| 43 | Edward Jr Smith | 19 | Son | Machine Feeder | Kentucky |
| 44 | Zelma C Zeller | 27 | Sister-in-law | New Worker | Kentucky |
| 45 | Hardin Day | 37 | Head | Saw Operator | Kentucky |
| 46 | Sarah Day | 36 | Wife | House Girl | Kentucky |
| 47 | Joe House | 36 | Head | Inspector | Kentucky |
| 48 | Eula L House | 37 | Wife | — | Kentucky |
| 49 | Eddy C Johnson | 41 | Lodger | Hand Sander | Kentucky |
| 50 | Willie R Gardner | 30 | Head | Delivery Driver | Kentucky |
| 51 | Pearl Gardner | 27 | Wife | — | Kentucky |
| 52 | Ava L Gardner | 4 | Daughter | — | Kentucky |
| 53 | Ray F Gardner | 1 | Son | — | Kentucky |
| 54 | James C Brock | 38 | Head | Boiler Maker | Kentucky |
| 55 | Bessie C Brock | 34 | Wife | — | Kentucky |
| 56 | Leon C Brock | 15 | Son | — | Kentucky |
| 57 | Grace L Brock | 14 | Daughter | — | Kentucky |
| 58 | Mary H Brock THIS PERSON | 12 | Daughter | — | Kentucky |
| 59 | Ethie Brock | 9 | Son | — | Kentucky |
| 60 | Wilma J Brock | 7 | Daughter | — | Kentucky |
| 61 | Orville H Middleton | 19 | Head | Boiler Maker Apprentice | Kentucky |
| 62 | Jewell Middleton | 18 | Wife | — | Kentucky |
| 63 | James C Carey | 29 | Head | Night Fireman | Kentucky |
| 64 | Geneva L Carey | 23 | Wife | — | Kentucky |
| 65 | Patricia Carey | 4 | Daughter | — | Kentucky |
| 66 | James D Carey | 2 | Son | — | Kentucky |
| 67 | John C Burch | 54 | Head | Night Watchman | Kentucky |
| 68 | Nell F Burch | 37 | Wife | — | Kentucky |
| 69 | Russell E Burch | 22 | Son | Engraver | Kentucky |
| 70 | Charles Fowler | 29 | Head | Truck Driver | Kentucky |
| 71 | Elizabeth Fowler | 23 | Wife | Machine Operator | Kentucky |
| 72 | Elizabeth Fowler | 62 | Mother | — | Kentucky |
| 73 | Robert H Bennett | 22 | Head | Machine Operator | Kentucky |
| 74 | Beatrice Bennett | 20 | Wife | Package Packer | Kentucky |
| 75 | David E Bennett | 3 | Son | — | Kentucky |
| 76 | Everett H Wakefield | 49 | Head | Chief Shipping Assistant | North Carolina |
| 77 | Ora V Wakefield | 52 | Wife | — | Alabama |
| 78 | Floyd E Horsley | 23 | Head | Meat Cutter | Kentucky |
| 79 | James W.C. Stanley | 62 | Head | Coach Repair Carpenter | Kentucky |
| 80 | Minnie C Stanley | 45 | Wife | — | 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)