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Roy Williams — 1940 US Census Record
Linked across censuses1940 United States Federal Census · St.-John-The-Baptist-County, Louisiana
Our Model Tree links this Roy Williams across the 1930 and 1940 US Censuses in St.-John-The-Baptist-County, Louisiana (XGBoost, ~Confirmed) — first a son (b.~1919), then head of a 8-person household.
Age 21
b. ~1919
Male
Son
Born: Louisiana
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | St.-John-The-Baptist-County, Louisiana |
| Surname | Williams |
| Given Name | Roy |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Louisiana |
| 1935 Residence (City) | Reserve |
| 1935 Residence (County) | St. John |
| Additional Details | |
| Occupation | Laborer |
| Industry | Sugar Refinery |
| Class of Worker | PW |
| Hours Worked | 32 |
| Income (1939) | 100 |
| Highest Grade | 7 |
| 1935 Residence | Same place |
| Birth State | Louisiana |
| Birth Country | United States |
| Birthplace (normalized) | louisiana |
| Occupation | Laborer |
| Township / Ward | Reserve |
| Est. Birth Year | ~1919 |
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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Roy | Age | Birth yr |
|---|---|---|---|---|
| Marguerite Williams | Daughter | — | 16 | ~1924 |
| Audrey Williams | Daughter | — | 11 | ~1929 |
| Marie Williams | Daughter | — | 27 | ~1913 |
| June Williams | Daughter | — | 14 | ~1926 |
| Octave Williams | Head | — | 54 | ~1886 |
| Roy Williams | Son | — | 21 | ~1919 |
| Allen Williams | Son | — | 18 | ~1922 |
| Mercie Williams | Spouse | — | 53 | ~1887 |
Census Appearances
1930
St John …
Son, age 11
St John The Baptist, Louisiana · implied b. ~1919 — 11 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Williams |
| Given Name | Roy |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Louisiana |
| Father's Birthplace | Louisiana |
| Mother's Birthplace | Louisiana |
| Can Read/Write | Yes |
| Birth State | Louisiana |
| Birth Country | United States |
| Birthplace (normalized) | louisiana |
1940
St.-John-The-Baptist-County, Louisiana
Son, age 21
St.-John-The-Baptist-County, Louisiana · implied b. ~1919 — 8 household members
| Surname | Williams |
| Given Name | Roy |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Louisiana |
| 1935 Residence (City) | Reserve |
| 1935 Residence (County) | St. John |
| Occupation | Laborer |
| Industry | Sugar Refinery |
| Class of Worker | PW |
| Hours Worked | 32 |
| Income (1939) | 100 |
| Highest Grade | 7 |
| 1935 Residence | Same place |
| Birth State | Louisiana |
| Birth Country | United States |
| Birthplace (normalized) | louisiana |
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 Roy Williams across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Roy Williams
Son · 1940 · age 21 · b. ~1919 · Louisiana
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Sibling
June Williams
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Marie Williams
Sibling · 1940 · age 27
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Allen Williams
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Audrey Williams
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Marguerite Williams
Sibling · 1940 · age 16
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 — St.-John-The-Baptist-County, Louisiana
Open full size
1940 US Federal Census — St.-John-The-Baptist-County, Louisiana
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01450-00273)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Francis Williams | 22 | Wife | — | Louisiana |
| 2 | Lloyd Jr. Williams | 1 | Son | — | Louisiana |
| 3 | James B. Parker | 46 | Head | Doctor | Alabama |
| 4 | Alma Parker | 46 | Wife | — | Texas |
| 5 | Searcy Parker | 16 | Son | — | Louisiana |
| 6 | Bethel Parker | 12 | Son | — | Louisiana |
| 7 | Alma Jane Parker | 11 | Daughter | — | Louisiana |
| 8 | Octave V. Williams | 54 | Head | Mechanic | Louisiana |
| 9 | Mercie Williams | 53 | Wife | — | Louisiana |
| 10 | Marie Williams | 27 | Daughter | Amach Clerk | Louisiana |
| 11 | Roy Williams THIS PERSON | 21 | Son | Laborer | Louisiana |
| 12 | Allen Williams | 18 | Son | — | Louisiana |
| 13 | Marguerite Williams | 16 | Daughter | — | Louisiana |
| 14 | June Williams | 14 | Daughter | — | Louisiana |
| 15 | Audrey Williams | 11 | Daughter | — | Louisiana |
| 16 | Nicolas Luke | 82 | Head | — | Louisiana |
| 17 | Augustin Luke | 53 | Son | — | Louisiana |
| 18 | Agnes Luke | 43 | Daughter | Small Pack Worker | Louisiana |
| 19 | Medric Luke | 52 | Son | — | Louisiana |
| 20 | Joyce Luke | 44 | Daughter-in-law | — | Louisiana |
| 21 | Theresa Luke | 22 | Granddaughter | Small Pack Worker | Louisiana |
| 22 | Alba Luke | 19 | Granddaughter | Homemaking | Louisiana |
| 23 | Hubert Luke | 38 | Head | Postmaster | Louisiana |
| 24 | Imelda Luke | 42 | Sister | — | Louisiana |
| 25 | Leonie Luke | 23 | Sister | Field Worker | Louisiana |
| 26 | Pauline Luke | 20 | Sister | — | Louisiana |
| 27 | Alcide J. Luke | 59 | Head | — | Louisiana |
| 28 | Brigitte Luke | 48 | Wife | — | Louisiana |
| 29 | Ita Luke | 26 | Daughter | Pack Meat | Louisiana |
| 30 | Leonie Luke | 24 | Daughter | Seamstress | Louisiana |
| 31 | Francis Luke | 22 | Son | — | Louisiana |
| 32 | Clarence Luke | 16 | Son | — | Louisiana |
| 33 | Marcus Luke | 14 | Son | — | Louisiana |
| 34 | Ernestine Breaux | 57 | Sister-in-law | — | Louisiana |
| 35 | Albert Vicknair | 47 | Head | Barber | Louisiana |
| 36 | Olga Vicknair | 42 | Wife | — | Louisiana |
| 37 | Marjorie Vicknair | 18 | Daughter | — | Louisiana |
| 38 | Henry Trosper | 38 | Head | Rural Carrier | Louisiana |
| 39 | Louretta Trosper | 37 | Wife | — | Louisiana |
| 40 | Bruce Trosper | 9 | Son | — | Louisiana |
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)