MF
Mary Fields — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Union-County, Louisiana
Our Model Tree links this Mary Fields across the 1930 and 1940 US Censuses in Union-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 | Union-County, Louisiana |
| Surname | Fields |
| Given Name | Mary Dell |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Louisiana |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Union |
| Additional Details | |
| Class of Worker | 0 |
| Highest Grade | No 6 |
| 1935 Residence | Louisiana |
| Birth State | Louisiana |
| Birth Country | United States |
| Birthplace (normalized) | louisiana |
| Township / Ward | Ward 4 |
| 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 |
|---|---|---|---|---|
| Freddie Fields | Daughter | — | 13 | ~1927 |
| Effie Fields | Daughter | — | 17 | ~1923 |
| Mary Fields | Daughter | — | 15 | ~1925 |
| Emma Fields | Daughter | — | 19 | ~1921 |
| Crawford Fields | Head | — | 50 | ~1890 |
| Brooks Fields | Son | — | 10 | ~1930 |
| Bobbie Fields | Son | — | 7 | ~1933 |
| Leroy Fields | Son | — | 16 | ~1924 |
| Hance Fields | Son | — | 25 | ~1915 |
| Sarah Fields | Spouse | — | 47 | ~1893 |
Census Appearances
1930
Union, Louisiana
Daughter, age 5
Union, Louisiana · implied b. ~1925 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Fields |
| Given Name | Martha Lee |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| 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
Union-County, Louisiana
Daughter, age 15
Union-County, Louisiana · implied b. ~1925 — 10 household members
| Surname | Fields |
| Given Name | Mary Dell |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Louisiana |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Union |
| Class of Worker | 0 |
| Highest Grade | No 6 |
| 1935 Residence | Louisiana |
| 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 Fields across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Fields
Daughter · 1940 · age 15 · b. ~1925 · Louisiana
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Sibling
Freddie Fields
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Hance Fields
Sibling · 1940 · age 25
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Brooks Fields
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Leroy Fields
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Emma Fields
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Bobbie Fields
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Effie Fields
Sibling · 1940 · age 17
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 — Union-County, Louisiana
Open full size
1940 US Federal Census — Union-County, Louisiana
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01460-00334)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Walter R Pratt | 71 | Head | — | Arkansas |
| 2 | Fannie Pratt | 70 | Wife | — | Georgia |
| 3 | Uhala Kilgore | 48 | Head | Cook | Louisiana |
| 4 | Printis Irons | 20 | Son | Farmer | Louisiana |
| 5 | Edd Kilgore | 41 | Brother | Laborer | Louisiana |
| 6 | Gunn Carsell | 37 | Head | Farmer | Louisiana |
| 7 | William Carsell | 58 | Brother | Farmer | Louisiana |
| 8 | Monroe Grafton | 36 | Head | Contractor | Louisiana |
| 9 | Ione Grafton | 36 | Wife | — | Louisiana |
| 10 | Willie Bee Grafton | 12 | Daughter | — | Louisiana |
| 11 | James Grafton | 10 | Son | — | Louisiana |
| 12 | Crawford Fields | 50 | Head | Laborer | Louisiana |
| 13 | Sarah Fields | 47 | Wife | — | Louisiana |
| 14 | Hance Fields | 25 | Son | Laborer | Louisiana |
| 15 | Emma Fields | 19 | Daughter | — | Louisiana |
| 16 | Effie Lee Fields | 17 | Daughter | — | Louisiana |
| 17 | Leroy Fields | 16 | Son | — | Louisiana |
| 18 | Mary Dell Fields THIS PERSON | 15 | Daughter | — | Louisiana |
| 19 | Freddie Fields | 13 | Daughter | — | Louisiana |
| 20 | Brooks Fields | 10 | Son | — | Louisiana |
| 21 | Bobbie Jean Fields | 7 | Son | — | Louisiana |
| 22 | Jim Watley | 67 | Head | Farmer | Georgia |
| 23 | Sallie Watley | 62 | Wife | — | Louisiana |
| 24 | Marshal Watley | 28 | Son | Farmer | Louisiana |
| 25 | Eurlene Watley | 24 | Daughter | Teacher | Louisiana |
| 26 | Commander Shills | 33 | Son-in-law | Laborer | Louisiana |
| 27 | Oasha Shills | 32 | Daughter | Laborer | Louisiana |
| 28 | James Shills | 13 | Grandson | — | Louisiana |
| 29 | Loris Shills | 10 | Grandson | — | Louisiana |
| 30 | Eugene Shills | 7 | Grandson | — | Louisiana |
| 31 | Willie Loyd Shills | 5 | Grandson | — | Louisiana |
| 32 | Daniel Shills | 1 | Grandson | — | Louisiana |
| 33 | Garfield Montgomery | 46 | Head | Farmer | Louisiana |
| 34 | Lizzie Montgomery | 40 | Wife | — | Louisiana |
| 35 | Willie Montgomery | 17 | Son | — | Louisiana |
| 36 | Louis Lee Montgomery | 14 | Daughter | — | Louisiana |
| 37 | Robert Lee Montgomery | 13 | Son | — | Louisiana |
| 38 | Ruthie Montgomery | 9 | Daughter | — | Louisiana |
| 39 | Son Montgomery | 7 | Son | — | Louisiana |
| 40 | Helen Montgomery | 4 | Daughter | — | 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)