MJ
Mary Jefferson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Beauregard-County, Louisiana
Our Model Tree links this Mary Jefferson across the 1930 and 1940 US Censuses in Beauregard-County, Louisiana (XGBoost, ~Confirmed) — first a daughter (b.~1925), then head of a 10-person household.
Age 15
b. ~1925
Female
Daughter
Born: Louisiana
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Beauregard-County, Louisiana |
| Surname | Jefferson |
| Given Name | Mary J |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Louisiana |
| 1935 Residence (City) | Ward 3 |
| 1935 Residence (County) | Beauregard |
| Additional Details | |
| Occupation | Housework |
| Industry | Home |
| Hours Worked | 5 |
| Income (1939) | 0 |
| Highest Grade | No 6 |
| 1935 Residence | Same place |
| Birth State | Louisiana |
| Birth Country | United States |
| Birthplace (normalized) | louisiana |
| Occupation | Housework |
| Township / Ward | Ward 3 |
| 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.
10 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Jamie Jefferson | Spouse | — | 32 | ~1908 |
| Lloyd Jefferson | Son | — | 10 | ~1930 |
| Carol Jefferson | Daughter | — | 8 | ~1932 |
| Thomas Jefferson | Son | — | 14 | ~1926 |
| Ida Jefferson | Daughter | — | 6 | ~1934 |
| Lawrence Jefferson | Son | — | 12 | ~1928 |
| Warner Jefferson | Daughter | — | 1 | ~1939 |
| Thomas Jefferson | Head | — | 37 | ~1903 |
| Edward Jefferson | Son | — | 3 | ~1937 |
| Mary Jefferson | Daughter | — | 15 | ~1925 |
Census Appearances
1930
Beauregard, Louisiana
Daughter, age 5
Beauregard, Louisiana · implied b. ~1925 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Jefferson |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 5 |
| Marital Status | Single |
| Birthplace | Louisiana |
| Father's Birthplace | Louisiana |
| Mother's Birthplace | Louisiana |
| Birth State | Louisiana |
| Birth Country | United States |
| Birthplace (normalized) | louisiana |
1940
Beauregard-County, Louisiana
Daughter, age 15
Beauregard-County, Louisiana · implied b. ~1925 — 10 household members
| Surname | Jefferson |
| Given Name | Mary J |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Louisiana |
| 1935 Residence (City) | Ward 3 |
| 1935 Residence (County) | Beauregard |
| Occupation | Housework |
| Industry | Home |
| Hours Worked | 5 |
| Income (1939) | 0 |
| Highest Grade | No 6 |
| 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 Mary Jefferson across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Jefferson
Daughter · 1940 · age 15 · b. ~1925 · Louisiana
★ You are viewing this record
Sibling
Lloyd Jefferson
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lawrence Jefferson
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ida Jefferson
Sibling · 1940 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Warner Jefferson
Sibling · 1940 · age 1
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Carol Jefferson
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Edward Jefferson
Sibling · 1940 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas Jefferson
Sibling · 1940 · age 14
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 — Beauregard-County, Louisiana
Open full size
1940 US Federal Census — Beauregard-County, Louisiana
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01383-00273)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Thomas Jefferson | 37 | Head | Car Washer | Louisiana |
| 2 | Jamie B Jefferson | 32 | Wife | Housewife | Louisiana |
| 3 | Mary J Jefferson THIS PERSON | 15 | Daughter | Housework | Louisiana |
| 4 | Thomas Jr Jefferson | 14 | Son | Housework | Louisiana |
| 5 | Lawrence Jefferson | 12 | Son | Housework | Louisiana |
| 6 | Lloyd Jefferson | 10 | Son | — | Louisiana |
| 7 | Carol E Jefferson | 8 | Daughter | — | Louisiana |
| 8 | Ida M Jefferson | 6 | Daughter | — | Louisiana |
| 9 | Edward Jefferson | 3 | Son | — | Louisiana |
| 10 | Warner J Jefferson | 1 | Daughter | — | Louisiana |
| 11 | James Jefferson | 35 | Head | Laborer | Louisiana |
| 12 | Grace Jefferson | 24 | Wife | House Wife | Texas |
| 13 | James Jr Jefferson | 8 | Son | — | Louisiana |
| 14 | Henry B Jefferson | 7 | Son | — | Louisiana |
| 15 | Alvina Jefferson | 4 | Daughter | — | Louisiana |
| 16 | George Thompson | 34 | Head | Laborer | Louisiana |
| 17 | Francis Thompson | 29 | Wife | House Wife | Louisiana |
| 18 | Olesia Thompson | 9 | Daughter | — | Louisiana |
| 19 | Bernice Thompson | 7 | Daughter | — | Louisiana |
| 20 | Jake Thompson | 5 | Son | — | Louisiana |
| 21 | Delphine E Thompson | 1 | Daughter | — | Louisiana |
| 22 | Lula Lee | 40 | Mother in law | Housekeeper | Louisiana |
| 23 | Edston Henry | 30 | Head | Laborer | Louisiana |
| 24 | Audrey Henry | 25 | Wife | House Wife | Louisiana |
| 25 | Bobby Ray Henry | 6 | Son | Cook | Louisiana |
| 26 | Claudie Potter | 21 | Brother in law | Laborer | Louisiana |
| 27 | William W Cunningham | 33 | Head | Laborer | Louisiana |
| 28 | Elnora Cunningham | 24 | Wife | House Wife | Arkansas |
| 29 | Bertha L Cunningham | 5 | Daughter | — | Louisiana |
| 30 | Anabele Cunningham | 3 | Daughter | — | Louisiana |
| 31 | William R Cunningham | 1 | Son | — | Louisiana |
| 32 | Robert N Glass | 65 | Head | Supervisor | Louisiana |
| 33 | Allie Glass | 50 | Wife | House Wife | Louisiana |
| 34 | Ohma J Glass | 27 | Son | Electrician | Louisiana |
| 35 | Glydus Glass | 21 | Daughter | Checker | Louisiana |
| 36 | Orland Glass | 19 | Son | Laborer | Louisiana |
| 37 | Prentice Glass | 18 | Son | Delivery Man | Louisiana |
| 38 | Milford Glass | 16 | Son | Laborer | Louisiana |
| 39 | Lucile Glass | 14 | Daughter | Laborer | Louisiana |
| 40 | Arless Glass | 10 | Son | — | Louisiana |
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)