MJ
Mary Jefferson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Humphreys-County, Mississippi
Our Model Tree links this Mary Jefferson across the 1930 and 1940 US Censuses in Humphreys-County, Mississippi (XGBoost, ~Confirmed) — first a daughter (b.~1928), then head of a 11-person household.
Age 12
b. ~1928
Female
Daughter
Born: Mississippi
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Humphreys-County, Mississippi |
| Surname | Jefferson |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Mississippi |
| 1935 Residence (City) | Beat 2 |
| 1935 Residence (County) | Humphreys |
| Additional Details | |
| Class of Worker | 0 |
| Highest Grade | No 2 |
| 1935 Residence | Same place |
| Birth State | Mississippi |
| Birth Country | United States |
| Birthplace (normalized) | mississippi |
| Township / Ward | Beat 2 |
| Est. Birth Year | ~1928 |
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.
11 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Alice Jefferson | Daughter | — | 2 | ~1938 |
| Ralph Jefferson | Head | — | 44 | ~1896 |
| John Jefferson | Son | — | 20 | ~1920 |
| Joseph Jefferson | Son | — | 9 | ~1931 |
| Virginia Jefferson | Daughter | — | 15 | ~1925 |
| Mertha Jefferson | Daughter | — | 5 | ~1935 |
| Le Jefferson | Son | — | 7 | ~1933 |
| Mary Jefferson | Daughter | — | 12 | ~1928 |
| Alice Jefferson | Spouse | — | 42 | ~1898 |
| Odah Jefferson | Daughter | — | 17 | ~1923 |
| James Jefferson | Son | — | 18 | ~1922 |
Census Appearances
1930
Humphreys, Mississippi
Daughter, age 2
Humphreys, Mississippi · implied b. ~1928 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Jefferson |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Mississippi |
| Father's Birthplace | Mississippi |
| Mother's Birthplace | Mississippi |
| Birth State | Mississippi |
| Birth Country | United States |
| Birthplace (normalized) | mississippi |
1940
Humphreys-County, Mississippi
Daughter, age 12
Humphreys-County, Mississippi · implied b. ~1928 — 11 household members
| Surname | Jefferson |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Mississippi |
| 1935 Residence (City) | Beat 2 |
| 1935 Residence (County) | Humphreys |
| Class of Worker | 0 |
| Highest Grade | No 2 |
| 1935 Residence | Same place |
| Birth State | Mississippi |
| Birth Country | United States |
| Birthplace (normalized) | mississippi |
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 12 · b. ~1928 · Mississippi
★ You are viewing this record
Sibling
Joseph Jefferson
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Virginia Jefferson
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Le Jefferson
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Jefferson
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Jefferson
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mertha Jefferson
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Odah Jefferson
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Alice Jefferson
Sibling · 1940 · age 2
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 — Humphreys-County, Mississippi
Open full size
1940 US Federal Census — Humphreys-County, Mississippi
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02030-00340)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Lurene Williams | 33 | Wife | — | Mississippi |
| 42 | Billy Williams | 12 | Son | — | Mississippi |
| 43 | Ouida Williams | 10 | Daughter | — | Mississippi |
| 44 | Malcom Jr. Williams | 8 | Son | — | Mississippi |
| 45 | Francis Williams | 2 | Son | — | Mississippi |
| 46 | Ralph Jefferson | 44 | Head | Farmer | Mississippi |
| 47 | Alice Jefferson | 42 | Wife | — | Mississippi |
| 48 | John Jefferson | 20 | Son | Laborer | Mississippi |
| 49 | James Jefferson | 18 | Son | Laborer | Mississippi |
| 50 | Odah Jefferson | 17 | Daughter | — | Mississippi |
| 51 | Virginia Jefferson | 15 | Daughter | — | Mississippi |
| 52 | Mary Jefferson THIS PERSON | 12 | Daughter | — | Mississippi |
| 53 | Joseph Jefferson | 9 | Son | — | Mississippi |
| 54 | Le Otis Jefferson | 7 | Son | — | Mississippi |
| 55 | Mertha Jefferson | 5 | Daughter | — | Mississippi |
| 56 | Alice Jefferson | 2 | Daughter | — | Mississippi |
| 57 | Nelson Hawkins | 47 | Head | Farmer | Mississippi |
| 58 | Annie Hawkins | 44 | Wife | — | Mississippi |
| 59 | William Hawkins | 20 | Son | Laborer | Mississippi |
| 60 | Edward Hawkins | 14 | Son | Laborer | Mississippi |
| 61 | Jessie Hawkins | 16 | Daughter | — | Mississippi |
| 62 | Henry Hawkins | 13 | Son | — | Mississippi |
| 63 | Andrew Hawkins | 13 | Son | — | Mississippi |
| 64 | Eoline Hawkins | 7 | Daughter | — | Mississippi |
| 65 | Pauline Hawkins | 5 | Daughter | — | Mississippi |
| 66 | Milage Jr Hawkins | 2 | Son | — | Mississippi |
| 67 | Andy Patterson | 34 | Head | Farmer | Mississippi |
| 68 | Alpha Patterson | 24 | Wife | — | Mississippi |
| 69 | Irene Patterson | 8 | Daughter | — | Mississippi |
| 70 | Linda Patterson | 1 | Daughter | — | Mississippi |
| 71 | D. J. Harkins | 28 | Head | Farmer | Mississippi |
| 72 | Christine Harkins | 25 | Wife | — | Mississippi |
| 73 | Caroline Harkins | 6 | Daughter | — | Mississippi |
| 74 | Carl Harkins | 6 | Son | — | Mississippi |
| 75 | David Earl Harkins | 4 | Son | — | Mississippi |
| 76 | William Raymond Harkins | 2 | Son | — | Mississippi |
| 77 | Sarah Frances Harkins | 1 | Daughter | — | Mississippi |
| 78 | Louis Datum | 30 | Head | Farmer | Mississippi |
| 79 | Lorene Datum | 27 | Wife | — | Mississippi |
| 80 | Lonnie Datum | 11 | Daughter | — | Mississippi |
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)