MJ
Mary Jefferson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Leon-County, Florida
Our Model Tree links this Mary Jefferson across the 1930 and 1940 US Censuses in Leon-County, Florida (XGBoost, ~Confirmed) — first a daughter (b.~1929), then head of a 10-person household.
Age 11
b. ~1929
Female
Daughter
Born: Florida
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Leon-County, Florida |
| Surname | Jefferson |
| Given Name | Mary Ellen |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Mulatto |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Florida |
| 1935 Residence (City) | E. Prec. 5 |
| 1935 Residence (County) | Leon |
| Additional Details | |
| Industry | 0 |
| Highest Grade | No 2 |
| 1935 Residence | Fla |
| Birth State | Florida |
| Birth Country | United States |
| Birthplace (normalized) | florida |
| Township / Ward | E Prec 5 |
| Est. Birth Year | ~1929 |
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 |
|---|---|---|---|---|
| Susie Jefferson | Daughter | — | 20 | ~1920 |
| Ethel Jefferson | Daughter | — | 6 | ~1934 |
| Cecil Hawkins | Other | — | 84 | ~1856 |
| Annie Jefferson | Daughter | — | 15 | ~1925 |
| Arthur Jefferson | Head | — | 42 | ~1898 |
| Malvana Jefferson | Daughter | — | 13 | ~1927 |
| Mary Jefferson | Daughter | — | 11 | ~1929 |
| Ellen Jefferson | Spouse | — | 43 | ~1897 |
| Mary Jefferson | Son | — | 4 | ~1936 |
| Abraham Jefferson | Son | — | 21 | ~1919 |
Census Appearances
1930
Leon, Florida
Daughter, age 1
Leon, Florida · implied b. ~1929 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Jefferson |
| Given Name | Mary E |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Florida |
| Father's Birthplace | Florida |
| Mother's Birthplace | Florida |
| Birth State | Florida |
| Birth Country | United States |
| Birthplace (normalized) | florida |
1940
Leon-County, Florida
Daughter, age 11
Leon-County, Florida · implied b. ~1929 — 10 household members
| Surname | Jefferson |
| Given Name | Mary Ellen |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Mulatto |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Florida |
| 1935 Residence (City) | E. Prec. 5 |
| 1935 Residence (County) | Leon |
| Industry | 0 |
| Highest Grade | No 2 |
| 1935 Residence | Fla |
| Birth State | Florida |
| Birth Country | United States |
| Birthplace (normalized) | florida |
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 11 · b. ~1929 · Florida
★ You are viewing this record
Sibling
Malvana Jefferson
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ethel Jefferson
Sibling · 1940 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Susie Jefferson
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Jefferson
Sibling · 1940 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Annie Jefferson
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Abraham Jefferson
Sibling · 1940 · age 21
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 — Leon-County, Florida
Open full size
1940 US Federal Census — Leon-County, Florida
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00597-00623)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Mary Lula | 18 | Daughter | — | Florida |
| 2 | Bessie | 17 | Daughter | — | Florida |
| 3 | Bessie | 15 | Son | — | Florida |
| 4 | Nancy Pearl | 14 | Daughter | — | Florida |
| 5 | Isaac Chipman | 12 | Son | — | Florida |
| 6 | General Washington | 10 | Son | — | Florida |
| 7 | Major Hawkins | 54 | Head | Farmer | Florida |
| 8 | Annisilla Hawkins | 51 | Wife | — | Florida |
| 9 | William H. Hilderbrand | 52 | Head | Farmer | Florida |
| 10 | Floria Hilderbrand | 39 | Wife | — | Georgia |
| 11 | Billy Hilderbrand | 13 | Son | — | Florida |
| 12 | Mankin Hilderbrand | 11 | Son | — | Florida |
| 13 | William Hilderbrand | 9 | Son | — | Florida |
| 14 | Annie Ruth Hilderbrand | 7 | Daughter | — | Florida |
| 15 | Chas Hilderbrand | 5 | Son | — | Florida |
| 16 | Caryline Hilderbrand | 3 | Daughter | — | Florida |
| 17 | Fred Jones | 30 | Head | Farmer | Florida |
| 18 | Ginnie Jones | 23 | Wife | — | Florida |
| 19 | Ida Jones | 5 | Daughter | — | Florida |
| 20 | Lessie Jones | 4 | Daughter | — | Florida |
| 21 | Rosa Lee Jones | 2 | Daughter | — | Florida |
| 22 | Eliza Jones | 0 | Son | — | Florida |
| 23 | Jane Young | 72 | Aunt | — | Florida |
| 24 | Willie Lee James | 16 | Cousin | — | Florida |
| 25 | Florence James | 28 | Sister | — | Florida |
| 26 | Arthur Jefferson | 42 | Head | Farmer | Florida |
| 27 | Ellen Jefferson | 43 | Wife | — | Florida |
| 28 | Abraham Jefferson | 21 | Son | — | Florida |
| 29 | Susie Jefferson | 20 | Daughter | — | Florida |
| 30 | Annie Jefferson | 15 | Daughter | — | Florida |
| 31 | Malvana Jefferson | 13 | Daughter | — | Florida |
| 32 | Mary Ellen Jefferson THIS PERSON | 11 | Daughter | — | Florida |
| 33 | Ethel Lee Jefferson | 6 | Daughter | — | Florida |
| 34 | Mary Regina Jefferson | 4 | Son | — | Florida |
| 35 | Cecil Hawkins | 84 | Mother-in-law | — | Florida |
| 36 | Arcie Means | 38 | Head | Wood Cutter | Georgia |
| 37 | Eula Mae Means | 25 | Wife | Farmer | Florida |
| 38 | Noble Dykes | 55 | Head | Farmer | Florida |
| 39 | Annis Dykes | 45 | Wife | — | Florida |
| 40 | Jannie Lee Dykes | 15 | Daughter | — | Florida |
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)