JL
John Lucas — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Hardin-County, Tennessee
Our Model Tree links this John Lucas across the 1930 and 1940 US Censuses in Hardin-County, Tennessee (XGBoost, ~Confirmed) — first a son (b.~1930), then head of a 9-person household.
Age 10
b. ~1930
Male
Son
Born: Tennessee
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Hardin-County, Tennessee |
| Surname | Lucas |
| Given Name | John R. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Tennessee |
| 1935 Residence (City) | Civil Dist No 5 |
| 1935 Residence (County) | Hardin |
| Additional Details | |
| Highest Grade | No 1 |
| 1935 Residence | Same place |
| Birth State | Tennessee |
| Birth Country | United States |
| Birthplace (normalized) | tennessee |
| Township / Ward | Civil Dist No 5 |
| 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.
9 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Corneal Lucas | Daughter | — | 12 | ~1928 |
| Bert Lucas | Head | — | 36 | ~1904 |
| George Lucas | Son | — | 14 | ~1926 |
| John Lucas | Son | — | 10 | ~1930 |
| Felton Lucas | Son | — | 1 | ~1939 |
| Joe Lucas | Son | — | 6 | ~1934 |
| Chase Lucas | Son | — | 9 | ~1931 |
| Whitten Lucas | Son | — | 4 | ~1936 |
| Elsie Lucas | Spouse | — | 36 | ~1904 |
Census Appearances
1930
Hardin, Tennessee
Son, age 1
Hardin, Tennessee · implied b. ~1929 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Lucas |
| Given Name | John R. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Tennessee |
| Father's Birthplace | Tennessee |
| Mother's Birthplace | Tennessee |
| Occupation | none |
| Birth State | Tennessee |
| Birth Country | United States |
| Birthplace (normalized) | tennessee |
1940
Hardin-County, Tennessee
Son, age 10
Hardin-County, Tennessee · implied b. ~1930 — 9 household members
| Surname | Lucas |
| Given Name | John R. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Tennessee |
| 1935 Residence (City) | Civil Dist No 5 |
| 1935 Residence (County) | Hardin |
| Highest Grade | No 1 |
| 1935 Residence | Same place |
| 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 John Lucas across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Lucas
Son · 1940 · age 10 · b. ~1930 · Tennessee
★ You are viewing this record
Sibling
George Lucas
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Felton Lucas
Sibling · 1940 · age 1
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Whitten Lucas
Sibling · 1940 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joe Lucas
Sibling · 1940 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Corneal Lucas
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Chase Lucas
Sibling · 1940 · age 9
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 — Hardin-County, Tennessee
Open full size
1940 US Federal Census — Hardin-County, Tennessee
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03901-00265)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Jesse C. Franks | 5 | Son | — | Tennessee |
| 2 | Dorothy J. Franks | 2 | Daughter | — | Tennessee |
| 3 | Alf O'Neill | 76 | Head | — | Tennessee |
| 4 | Florence O'Neill | 27 | Wife | — | Tennessee |
| 5 | Leon O'Neill | 28 | Son | — | Tennessee |
| 6 | Wilma O'Neill | 16 | Daughter | — | Tennessee |
| 7 | Homer White | 34 | Head | Sleeping Banks | Arkansas |
| 8 | Ida White | 30 | Wife | — | Tennessee |
| 9 | James W. White | 11 | Son | — | Tennessee |
| 10 | Willie T. White | 2 | Son | — | Tennessee |
| 11 | Joe Briley | 64 | Head | — | Tennessee |
| 12 | Nannie Briley | 67 | Wife | — | Tennessee |
| 13 | David Briley | 29 | Head | Sleeper Banks | Tennessee |
| 14 | Una B. Briley | 23 | Wife | — | Tennessee |
| 15 | Barbara S. Briley | 3 | Daughter | — | Tennessee |
| 16 | James D. Briley | 2 | Son | — | Tennessee |
| 17 | Luther Gray | 29 | Head | Lime Burner | Tennessee |
| 18 | Edith Gray | 27 | Wife | — | Tennessee |
| 19 | Nellie M. Gray | 8 | Daughter | — | Tennessee |
| 20 | Enos Gray | 7 | Daughter | — | Tennessee |
| 21 | Geneva Gray | 2 | Daughter | — | Tennessee |
| 22 | Paul Gray | 15 | Son | — | Tennessee |
| 23 | Columbus Gray | 2 | Son | — | Tennessee |
| 24 | Bert Lucas | 36 | Head | Crushed Gravel | Tennessee |
| 25 | Elsie Lucas | 36 | Wife | — | Tennessee |
| 26 | George L. Lucas | 14 | Son | — | Tennessee |
| 27 | Corneal Lucas | 12 | Daughter | — | Tennessee |
| 28 | John R. Lucas THIS PERSON | 10 | Son | — | Tennessee |
| 29 | Chase E. Lucas | 9 | Son | — | Tennessee |
| 30 | Joe Lucas | 6 | Son | — | Tennessee |
| 31 | Whitten Lucas | 4 | Son | — | Tennessee |
| 32 | Felton Lucas | 1 | Son | — | Tennessee |
| 33 | Mack Berry | 45 | Head | Road Work | Tennessee |
| 34 | Beulah Berry | 39 | Wife | — | Tennessee |
| 35 | Ruby Berry | 17 | Daughter | — | Tennessee |
| 36 | Bernice Berry | 13 | Daughter | — | Tennessee |
| 37 | Paul Berry | 11 | Son | — | Tennessee |
| 38 | Annie E. Berry | 9 | Daughter | — | Tennessee |
| 39 | Hershel Franke | 35 | Head | Farm Operator | Tennessee |
| 40 | Vada Franke | 39 | Wife | — | Tennessee |
Related Census Records
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)