JD
John Duncan — 1940 US Census Record
Model Tree available1940 United States Federal Census · Dutchess-County, New York
Our Model Tree links this John Duncan across the 1920, 1930 and 1940 US Censuses in Dutchess-County, New York (XGBoost, ~Confirmed), with identified parents Harry & Perry — first a son (b.~1919), then head of a 6-person household.
Age 21
b. ~1919
Male
Son
Born: New York
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Dutchess-County, New York |
| Surname | Duncan |
| Given Name | John W. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | New York |
| 1935 Residence (City) | Beekman Town |
| 1935 Residence (County) | Dutchess |
| Additional Details | |
| Highest Grade | No 6 |
| 1935 Residence | Same place |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
| Township / Ward | Beekman Town |
| Est. Birth Year | ~1919 |
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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Perry Duncan | Head | — | 60 | ~1880 |
| Marjorie Duncan | Other | — | 20 | ~1920 |
| Betty Duncan | Other | — | 1 | ~1939 |
| John Duncan | Son | — | 21 | ~1919 |
| William Duncan | Son | — | 13 | ~1927 |
| Jennie Duncan | Spouse | — | 54 | ~1886 |
Census Appearances
1920
Dutchess, New …
Son, age 1
Dutchess, New York · implied b. ~1919 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Duncan |
| Given Name | John H |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | New York |
| Father's Birthplace | New York |
| Mother's Birthplace | New York |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
1930
Dutchess, New …
Son, age 11
Dutchess, New York · implied b. ~1919 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Duncan |
| Given Name | John W. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | New York |
| Father's Birthplace | New York |
| Mother's Birthplace | New York |
| Can Read/Write | Yes |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
1940
Dutchess-County, New …
Son, age 21
Dutchess-County, New York · implied b. ~1919 — 6 household members
| Surname | Duncan |
| Given Name | John W. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | New York |
| 1935 Residence (City) | Beekman Town |
| 1935 Residence (County) | Dutchess |
| Highest Grade | No 6 |
| 1935 Residence | Same place |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
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 John Duncan across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Harry Duncan (~0.92 confidence) and father Perry Duncan (~0.92 confidence) and mother Jennie Duncan (~0.92 confidence) and mother Jennie Duncan (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Harry Duncan
b. ~1880
Source father
● Household
· direct · ~0.92
Father
Perry Duncan
b. ~1880
Source father
● Household
· direct · ~0.92
Mother
Jennie Duncan
b. ~1886
Source mother
● Household
· direct · ~0.92
Mother
Jennie Duncan
b. ~1886
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Duncan
Son · 1940 · age 21 · b. ~1919 · New York
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Sibling
William Duncan
Sibling · 1940 · age 13
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 — Dutchess-County, New York
Open full size
1940 US Federal Census — Dutchess-County, New York
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02522-00559)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Evelyn Haskin | 48 | Housekeeper | Housekeeper | New York |
| 2 | James Bingham | 54 | Hired hand | Farm Hand | Connecticut |
| 3 | Clarence Post | 54 | Head | Laborer | New York |
| 4 | Bertha Post | 41 | Wife | — | Connecticut |
| 5 | Vera Post | 12 | Daughter | — | New York |
| 6 | Shirley Post | 9 | Daughter | — | New York |
| 7 | Ruth Post | 6 | Daughter | — | New York |
| 8 | Russell Minni | 41 | Head | Farm Hand | New York |
| 9 | Marie Minni | 34 | Wife | — | New York |
| 10 | Leona Minni | 15 | Daughter | House Work | New York |
| 11 | Hattie Minni | 13 | Daughter | — | New York |
| 12 | Everett Minni | 9 | Son | — | New York |
| 13 | Mary Alice Minni | 8 | Daughter | — | New York |
| 14 | Betty Minni | 8 | Daughter | — | New York |
| 15 | Eleanor Minni | 4 | Daughter | — | New York |
| 16 | Wilson Jackson | 52 | Lodger | Farm Work | New York |
| 17 | Marshal Johnson | 39 | Lodger | Laborer | Virginia |
| 18 | Carl C. Dodge | 28 | Head | Farmer | New York |
| 19 | Bernice F. Dodge | 29 | Sister | School Teacher | New York |
| 20 | Florine M. Dodge | 22 | Sister | — | New York |
| 21 | Emily F. Dodge | 17 | Sister | — | New York |
| 22 | Charles Hancock | 31 | Head | Mechanic | Virginia |
| 23 | Nellie Hancock | 26 | Wife | — | New York |
| 24 | Mary Lou Hancock | 8 | Daughter | — | New York |
| 25 | Barbara Hancock | 7 | Daughter | — | New York |
| 26 | Doris Hancock | 4 | Daughter | — | New York |
| 27 | Marjorie Hancock | 3 | Daughter | — | New York |
| 28 | Cassie Bowers | 37 | Head | Laundress | Connecticut |
| 29 | Sylvester Bowers | 28 | Husband | Laborer | Virginia |
| 30 | Eugene Casey | 43 | Head | Horseman | Connecticut |
| 31 | Sena Casey | 28 | Wife | Maid | New York |
| 32 | Arthur Barrett | 60 | Head | Road Work | New York |
| 33 | Grace Jackson | 50 | Housekeeper | — | New York |
| 34 | Perry E. Duncan | 60 | Head | Road Work | New York |
| 35 | Jennie Marie Duncan | 54 | Wife | — | New York |
| 36 | William H. Duncan | 13 | Son | — | New York |
| 37 | John W. Duncan THIS PERSON | 21 | Son | — | New York |
| 38 | Marjorie Duncan | 20 | Daughter-in-law | — | New York |
| 39 | Betty L. Duncan | 1 | Granddaughter | — | New York |
| 40 | Ray Dorn De | 56 | Head | Farmer | New York |
Pedigree Summary
John + 1 sibling
Gen 1 · 4 parents
~0.92
Max depth 4 (1900–1950 window)
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)