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Mary Brock — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Roane-County, Tennessee
Our Model Tree links this Mary Brock across the 1930 and 1940 US Censuses in Roane-County, Tennessee (XGBoost, ~Confirmed) — first a daughter (b.~1925), then head of a 7-person household.
Age 15
b. ~1925
Female
Daughter
Born: Tennessee
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Roane-County, Tennessee |
| Surname | Brock |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Tennessee |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Roane |
| Additional Details | |
| Highest Grade | G 6 |
| 1935 Residence | Tennessee |
| Birth State | Tennessee |
| Birth Country | United States |
| Birthplace (normalized) | tennessee |
| Township / Ward | Civil District 1 |
| Est. Birth Year | ~1925 |
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 |
|---|---|---|---|---|
| Martha Brock | Spouse | — | 46 | ~1894 |
| Robert Brock | Son | — | 8 | ~1932 |
| George Brock | Son | — | 12 | ~1928 |
| Mary Brock | Daughter | — | 15 | ~1925 |
| Oster Brock | Son | — | 20 | ~1920 |
| Elmer Brock | Son | — | 18 | ~1922 |
| Albert Brock | Head | — | 48 | ~1892 |
Census Appearances
1930
Roane, Tennessee
Daughter, age 6
Roane, Tennessee · implied b. ~1924 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Brock |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 6 |
| Marital Status | Single |
| Birthplace | Tennessee |
| Father's Birthplace | Tennessee |
| Mother's Birthplace | Tennessee |
| Birth State | Tennessee |
| Birth Country | United States |
| Birthplace (normalized) | tennessee |
1940
Roane-County, Tennessee
Daughter, age 15
Roane-County, Tennessee · implied b. ~1925 — 7 household members
| Surname | Brock |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Tennessee |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Roane |
| Highest Grade | G 6 |
| 1935 Residence | Tennessee |
| Birth State | Tennessee |
| Birth Country | United States |
| Birthplace (normalized) | tennessee |
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 15 · b. ~1925 · Tennessee
★ You are viewing this record
Sibling
George Brock
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Oster Brock
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Brock
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Elmer Brock
Sibling · 1940 · age 18
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 — Roane-County, Tennessee
Open full size
1940 US Federal Census — Roane-County, Tennessee
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03929-00641)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Carlos Kelly | 11 | Son | — | Tennessee |
| 2 | Nelson Kelly | 29 | Son | Laborer | Tennessee |
| 3 | C. T. Kelly | 62 | Brother | Foreman | Tennessee |
| 4 | John A. Nichols | 85 | Head | — | Tennessee |
| 5 | H. H. Nichols | 30 | Son | Mechanic | Tennessee |
| 6 | John A. Walker | 49 | Head | Lawyer | Tennessee |
| 7 | Martha Walker | 42 | Wife | — | Tennessee |
| 8 | Robert Kenneth Walker | 15 | Son | — | Tennessee |
| 9 | Winston Walker | 13 | Son | — | Tennessee |
| 10 | Nancy Walker | 11 | Daughter | — | Tennessee |
| 11 | Kathleen Walker | 7 | Daughter | — | Tennessee |
| 12 | Herman Spangler | 43 | Head | Laborer | Tennessee |
| 13 | Ethel Spangler | 53 | Wife | — | Tennessee |
| 14 | William A. Tadder | 52 | Head | Road Overseer | Tennessee |
| 15 | Maud Tadder | 48 | Wife | — | Tennessee |
| 16 | Lloyd Tadder | 28 | Head | Grader Operator | Tennessee |
| 17 | Ovalene Tadder | 24 | Wife | — | Tennessee |
| 18 | Ramona Tadder | 1 | Daughter | — | Tennessee |
| 19 | Teddy Tadder | 1 | Son | — | Tennessee |
| 20 | Freddie Tadder | 1 | Son | — | Tennessee |
| 21 | Alonzo Tadder | 26 | Head | Boarder-Room | Tennessee |
| 22 | Albelia Tadder | 22 | Wife | — | Tennessee |
| 23 | William Hayes Tadder | 1 | Son | — | Tennessee |
| 24 | Albert Brock | 48 | Head | Farmer | Tennessee |
| 25 | Martha Brock | 46 | Wife | — | Tennessee |
| 26 | Oster Brock | 20 | Son | Farmer | Tennessee |
| 27 | Elmer Brock | 18 | Son | Farmer | Tennessee |
| 28 | Mary Brock THIS PERSON | 15 | Daughter | — | Tennessee |
| 29 | George Brock | 12 | Son | — | Tennessee |
| 30 | Robert Brock | 8 | Son | — | Tennessee |
| 31 | John Mullins | 45 | Head | Fire & Water Tender | Tennessee |
| 32 | Stella Mullins | 40 | Wife | — | Tennessee |
| 33 | Bonnie Mullins | 14 | Daughter | — | Tennessee |
| 34 | Charles Mullins | 12 | Son | — | Tennessee |
| 35 | Willie Mullins | 11 | Daughter | — | Tennessee |
| 36 | Betty Mullins | 9 | Daughter | — | Tennessee |
| 37 | Fred Mullins | 8 | Son | — | Tennessee |
| 38 | Shirley Mullins | 5 | Daughter | — | Tennessee |
| 39 | Garland Mullins | 2 | Son | — | Tennessee |
| 40 | Virginia Jo Mullins | 0 | Daughter | — | 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)