MD
Mary Duncan — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Montgomery-County, Alabama
Our Model Tree links this Mary Duncan across the 1920, 1930 and 1940 US Censuses in Montgomery-County, Alabama (XGBoost, ~Confirmed) — first a spouse (b.~1895), then head of a 3-person household.
Age 45
b. ~1895
Female
Spouse
Born: Alabama
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Montgomery-County, Alabama |
| Surname | Duncan |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | Black |
| Age | 45 |
| Marital Status | Married |
| Birthplace | Alabama |
| 1935 Residence (City) | Kendall |
| 1935 Residence (County) | Montgomery |
| Additional Details | |
| Occupation | Laundress |
| Industry | Private Home |
| Class of Worker | PW |
| Hours Worked | 20 |
| Income (1939) | 104 |
| Highest Grade | No 3 |
| 1935 Residence | Same place |
| Birth State | Alabama |
| Birth Country | United States |
| Birthplace (normalized) | alabama |
| Occupation | Laundress |
| Township / Ward | Kendall |
| Est. Birth Year | ~1895 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| George Duncan | Head | — | 26 | ~1914 |
| George Duncan | Son | — | 11 | ~1929 |
| Mary Duncan | Spouse | — | 45 | ~1895 |
Census Appearances
1920
Montgomery, Alabama
Spouse, age 26
Montgomery, Alabama · implied b. ~1894 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Duncan |
| Given Name | Mary Lou |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | Black |
| Age | 26 |
| Marital Status | Married |
| Birthplace | Alabama |
| Father's Birthplace | Alabama |
| Mother's Birthplace | Alabama |
| Occupation | Farm Laborer |
| Industry | Home Farm |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Alabama |
| Birth Country | United States |
| Birthplace (normalized) | alabama |
1930
Montgomery, Alabama
Other, age 37
Montgomery, Alabama · implied b. ~1893 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Duncan |
| Given Name | Mary |
| Relationship to Head | Wife-H |
| Sex | F |
| Color / Race | Black |
| Age | 37 |
| Marital Status | Married |
| Birthplace | Alabama |
| Age at First Marriage | 17 |
| Father's Birthplace | Alabama |
| Mother's Birthplace | Alabama |
| Occupation | Farm hand |
| Industry | General farm |
| Class of Worker | W |
| Can Read/Write | No |
| Birth State | Alabama |
| Birth Country | United States |
| Birthplace (normalized) | alabama |
1940
Montgomery-County, Alabama
Spouse, age 45
Montgomery-County, Alabama · implied b. ~1895 — 3 household members
| Surname | Duncan |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | Black |
| Age | 45 |
| Marital Status | Married |
| Birthplace | Alabama |
| 1935 Residence (City) | Kendall |
| 1935 Residence (County) | Montgomery |
| Occupation | Laundress |
| Industry | Private Home |
| Class of Worker | PW |
| Hours Worked | 20 |
| Income (1939) | 104 |
| Highest Grade | No 3 |
| 1935 Residence | Same place |
| Birth State | Alabama |
| Birth Country | United States |
| Birthplace (normalized) | alabama |
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 Duncan across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Mary Duncan
Spouse · 1940 · age 45 · b. ~1895 · Alabama
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Montgomery-County, Alabama
Open full size
1940 US Federal Census — Montgomery-County, Alabama
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00070-00508)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Matthew Carter | 25 | Head | Laborer | Alabama |
| 2 | Nora Carter | 24 | Wife | — | Alabama |
| 3 | Carter Burt | 37 | Head | Farmer | Alabama |
| 4 | Fannie Burt | 27 | Wife | — | Alabama |
| 5 | Garden Morris | 52 | Head | Farmer | Alabama |
| 6 | Willie Morris | 34 | Wife | — | Alabama |
| 7 | Edna N Morris | 17 | Daughter | — | Alabama |
| 8 | Harrel Morris | 14 | Son | — | Alabama |
| 9 | Han Barrow | 39 | Head | Truck Driver | Alabama |
| 10 | Lillie M Barrow | 39 | Wife | — | Alabama |
| 11 | Preston Barrow | 19 | Son | Farmer | Alabama |
| 12 | Ruby Barrow | 17 | Daughter | — | Alabama |
| 13 | Robert Barrow | 13 | Son | — | Alabama |
| 14 | Milton Barrow | 12 | Son | — | Alabama |
| 15 | Charles Barrow | 1 | Son | — | Alabama |
| 16 | Albert L Mims | 60 | Head | Farmer | Alabama |
| 17 | Maud Mims | 50 | Wife | — | Alabama |
| 18 | Howard Woodfin | 27 | Head | Farmer | Alabama |
| 19 | Gertrude Woodfin | 24 | Wife | — | Alabama |
| 20 | James Woodfin | 6 | Son | — | Alabama |
| 21 | Marcus Lawson | 46 | Head | Truck Driver | Alabama |
| 22 | Thelma Lawson | 39 | Wife | — | Alabama |
| 23 | James Lawson | 16 | Son | — | Alabama |
| 24 | Sam Lawson | 14 | Son | — | Alabama |
| 25 | Jack Lawson | 3 | Son | — | Alabama |
| 26 | Fred Wolfgang | 26 | Head | Timekeeper | Alabama |
| 27 | Earline Wolfgang | 18 | Wife | — | Alabama |
| 28 | Wolfgang | 0 | Son | — | Alabama |
| 29 | Michael Quigley | 44 | Head | Plumber | Alabama |
| 30 | Xania Quigley | 20 | Wife | — | Alabama |
| 31 | Sallie A Quigley | 14 | Daughter | — | Alabama |
| 32 | J. C. Reenes | 56 | Father | — | Alabama |
| 33 | George Duncan | 26 | Head | Farm Hand | Alabama |
| 34 | Mary Duncan THIS PERSON | 45 | Wife | Laundress | Alabama |
| 35 | George Duncan | 11 | Son | — | Alabama |
| 36 | Yeldrew Clark | 37 | Head | Lineman | Mississippi |
| 37 | Laura Clark | 28 | Wife | — | Alabama |
| 38 | Savannah Sellers | 45 | Wife | Laundress | Alabama |
| 39 | Mose Sellers | 50 | Head | Farmer | Alabama |
| 40 | Ernest Sellers | 20 | Son | Laborer | Alabama |
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)