JB
James Brock — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Tarrant-County, Texas
Our Model Tree links this James Brock across the 1930 and 1940 US Censuses in Tarrant-County, Texas (XGBoost, ~Confirmed) — first a son (b.~1920), then head of a 5-person household.
Age 20
b. ~1920
Male
Son
Born: Texas
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Tarrant-County, Texas |
| Surname | Brock |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Texas |
| 1935 Residence (City) | Ft Worth City |
| 1935 Residence (County) | Tarrant |
| Additional Details | |
| Occupation | Salesman |
| Industry | Department Store |
| Class of Worker | PW |
| Hours Worked | 12 |
| Income (1939) | 650 |
| Highest Grade | C-2 |
| 1935 Residence | Same place |
| Birth State | Texas |
| Birth Country | United States |
| Birthplace (normalized) | texas |
| Occupation | Salesman |
| Township / Ward | Ft Worth City |
| Est. Birth Year | ~1920 |
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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to James | Age | Birth yr |
|---|---|---|---|---|
| William Brock | Head | — | 52 | ~1888 |
| James Brock | Son | — | 20 | ~1920 |
| Betty Brock | Daughter | — | 15 | ~1925 |
| Dan Brock | Son | — | 15 | ~1925 |
| Lillie Brock | Spouse | — | 49 | ~1891 |
Census Appearances
1930
Tarrant, Texas
Son, age 10
Tarrant, Texas · implied b. ~1920 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Brock |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Texas |
| Father's Birthplace | Texas |
| Mother's Birthplace | Texas |
| Can Read/Write | Yes |
| Birth State | Texas |
| Birth Country | United States |
| Birthplace (normalized) | texas |
1940
Tarrant-County, Texas
Son, age 20
Tarrant-County, Texas · implied b. ~1920 — 5 household members
| Surname | Brock |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Texas |
| 1935 Residence (City) | Ft Worth City |
| 1935 Residence (County) | Tarrant |
| Occupation | Salesman |
| Industry | Department Store |
| Class of Worker | PW |
| Hours Worked | 12 |
| Income (1939) | 650 |
| Highest Grade | C-2 |
| 1935 Residence | Same place |
| Birth State | Texas |
| Birth Country | United States |
| Birthplace (normalized) | texas |
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 20 · b. ~1920 · Texas
★ You are viewing this record
Sibling
Dan Brock
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Betty 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 — Tarrant-County, Texas
Open full size
1940 US Federal Census — Tarrant-County, Texas
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-04185-00731)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | William L. Blount | 50 | Head | — | Texas |
| 42 | Lucile S. Blount | 48 | Wife | Manager | Texas |
| 43 | Francis Smith | 28 | Lodger | Stenographer | Nebraska |
| 44 | Alvin Bailey | 45 | Head | Salesman | Kentucky |
| 45 | Myrtle D. Bailey | 40 | Wife | — | Oklahoma |
| 46 | Alvin Bailey | 17 | Son | — | Oklahoma |
| 47 | Cameron Wright | 46 | Head | Plumber | Texas |
| 48 | Willie R. Wright | 42 | Wife | — | Texas |
| 49 | Lloyd Wright | 19 | Son | New Worker | Texas |
| 50 | William C. Bateman | 46 | Head | Mechanic | Texas |
| 51 | Agnes D. Bateman | 46 | Wife | — | Texas |
| 52 | William R. Bateman | 8 | Son | — | Texas |
| 53 | Martha Bateman | 6 | Daughter | — | Texas |
| 54 | Horace R. Davenport | 27 | Head | Meter Installer | New Mexico |
| 55 | Mildred Davenport | 26 | Wife | Clerical | Texas |
| 56 | Mattie S. Carder | 71 | Head | — | Texas |
| 57 | James E. Echols | 62 | Head | Contractor | Texas |
| 58 | Ruth R. Echols | 52 | Wife | — | Texas |
| 59 | William E. Brock | 52 | Head | Finance Building | Texas |
| 60 | Lillie S. Brock | 49 | Wife | — | Texas |
| 61 | James Brock THIS PERSON | 20 | Son | Salesman | Texas |
| 62 | Dan Brock | 15 | Son | — | Texas |
| 63 | Betty Brock | 15 | Daughter | — | Texas |
| 64 | Edd R. C. Meyers | 50 | Head | Merchant Taylor | Texas |
| 65 | Dessie D. Meyers | 47 | Wife | — | Kansas |
| 66 | Dorothy Meyers | 23 | Daughter | — | Texas |
| 67 | Virginia Meyers | 21 | Daughter | Teacher | Texas |
| 68 | Warren V. Keith | 49 | Head | Salesman | Virginia |
| 69 | Lillian S. Keith | 48 | Wife | — | Texas |
| 70 | Warren Jr. Keith | 18 | Son | — | Texas |
| 71 | Linda Keith | 11 | Daughter | — | Texas |
| 72 | John Keith | 3 | Son | — | Texas |
| 73 | Vernon, Scott S. Keith | 27 | Lodger | Service Attendant | Texas |
| 74 | Carlos J. Yoder | 53 | Head | — | Texas |
| 75 | Murry N. Roberts | 37 | Head | Salesman | Texas |
| 76 | Paula Z. Roberts | 34 | Wife | Saleslady | Arkansas |
| 77 | Charles J. Patton | 52 | Head | Engineer | Texas |
| 78 | Loretta D. Patton | 28 | Wife | — | Utah |
| 79 | Joan Patton | 5 | Daughter | — | Texas |
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)