JD
James Duncan — 1940 US Census Record
Model Tree available1940 United States Federal Census · Armstrong-County, Pennsylvania
Our Model Tree links this James Duncan across the 1920, 1930 and 1940 US Censuses in Armstrong-County, Pennsylvania (XGBoost, ~Confirmed), with identified parents John & W — first a head (b.~1901), then head of a 6-person household.
Age 39
b. ~1901
Male
Head
Born: Pennsylvania
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Armstrong-County, Pennsylvania |
| Surname | Duncan |
| Given Name | James N. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 39 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Rural |
| 1935 Residence (County) | Armstrong |
| Additional Details | |
| Occupation | Miner |
| Industry | Coal Mine |
| Class of Worker | PW |
| Hours Worked | 28 |
| Income (1939) | 850 |
| Highest Grade | 8 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Occupation | Miner |
| Township / Ward | Rural |
| Est. Birth Year | ~1901 |
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 James | Age | Birth yr |
|---|---|---|---|---|
| Wilhelmina Duncan | Daughter | — | 4 | ~1936 |
| June Duncan | Daughter | — | 13 | ~1927 |
| Laverne Duncan | Daughter | — | 14 | ~1926 |
| James Duncan | Head | — | 39 | ~1901 |
| Fred Duncan | Son | — | 8 | ~1932 |
| Gladys Duncan | Spouse | — | 39 | ~1901 |
Census Appearances
1920
Armstrong, Pennsylvania
Son, age 19
Armstrong, Pennsylvania · implied b. ~1901 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Duncan |
| Given Name | James C |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Occupation | Miner |
| Industry | Coal mine |
| Class of Worker | W |
| Can Read | No |
| Can Write | No |
| Speaks English | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1930
Armstrong, Pennsylvania
Son, age 29
Armstrong, Pennsylvania · implied b. ~1901 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Duncan |
| Given Name | James O. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 29 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| Age at First Marriage | 24 |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Occupation | Miner |
| Industry | Coal mine |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Armstrong-County, Pennsylvania
Head, age 39
Armstrong-County, Pennsylvania · implied b. ~1901 — 6 household members
| Surname | Duncan |
| Given Name | James N. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 39 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Rural |
| 1935 Residence (County) | Armstrong |
| Occupation | Miner |
| Industry | Coal Mine |
| Class of Worker | PW |
| Hours Worked | 28 |
| Income (1939) | 850 |
| Highest Grade | 8 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
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 James Duncan across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father John Duncan (~0.92 confidence) and father W Craig (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
John Duncan
b. ~1862
Source father
● Household
· direct · ~0.92
Father
W Craig
b. ~1875
Source father
● Household
· direct · ~0.92
This person
Anchor record
James Duncan
Head · 1940 · age 39 · b. ~1901 · Pennsylvania
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Armstrong-County, Pennsylvania
Open full size
1940 US Federal Census — Armstrong-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03423-00691)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Walter Sommerville | 25 | Head | Miner | Pennsylvania |
| 42 | Maude Cousins | 60 | Head | Farmer | Pennsylvania |
| 43 | Kathryn Cousins | 51 | Wife | — | Pennsylvania |
| 44 | Alberta Cousins | 23 | Daughter | Teacher | Pennsylvania |
| 45 | Donald Cousins | 20 | Son | Laborer | Pennsylvania |
| 46 | Roger Cousins | 18 | Son | Laborer | Pennsylvania |
| 47 | Clarence Mccray | 42 | Head | Farmer | Pennsylvania |
| 48 | George Mccray | 51 | Head | Farmer | Pennsylvania |
| 49 | Elizabeth Mccray | 47 | Wife | — | Pennsylvania |
| 50 | Paul Mccray | 22 | Son | Laborer | Pennsylvania |
| 51 | Emma J. Mccray | 20 | Daughter | Housework | Pennsylvania |
| 52 | Allen Mccray | 19 | Son | Farmer | Pennsylvania |
| 53 | Alfred Mccray | 19 | Son | Farmer | Pennsylvania |
| 54 | Hayes Mccray | 10 | Son | — | Pennsylvania |
| 55 | Edgar Hepler | 48 | Head | Farmer | Pennsylvania |
| 56 | Alma Hepler | 39 | Wife | — | Pennsylvania |
| 57 | Lloyd Hepler | 19 | Son | Farmer | Pennsylvania |
| 58 | Adonelle Hepler | 17 | Daughter | — | Pennsylvania |
| 59 | James Hepler | 87 | Father | — | Pennsylvania |
| 60 | Herman J. Hanks | 67 | Head | Farmer | Pennsylvania |
| 61 | Robert L. Hanks | 68 | Brother | Farmer | Pennsylvania |
| 62 | Sallie Hanks | 69 | Sister | Farmer | Pennsylvania |
| 63 | James N. Duncan THIS PERSON | 39 | Head | Miner | Pennsylvania |
| 64 | Gladys Duncan | 39 | Wife | — | Pennsylvania |
| 65 | Laverne Duncan | 14 | Daughter | — | Pennsylvania |
| 66 | June Duncan | 13 | Daughter | — | Pennsylvania |
| 67 | Fred Duncan | 8 | Son | — | Pennsylvania |
| 68 | Wilhelmina Duncan | 4 | Daughter | — | Pennsylvania |
| 69 | Herbert W. Duncan | 72 | Head | Farmer | Pennsylvania |
| 70 | Nellie Duncan | 63 | Wife | — | Pennsylvania |
| 71 | Gale Duncan | 25 | Son | Farmer | Pennsylvania |
| 72 | Lloyd Williams | 46 | Head | Miner | Pennsylvania |
| 73 | Catherine Williams | 38 | Wife | — | Pennsylvania |
| 74 | Claus Williams | 15 | Son | Farmer | Pennsylvania |
| 75 | Earl Williams | 13 | Son | — | Pennsylvania |
| 76 | Sarah Williams | 84 | Mother | — | Pennsylvania |
| 77 | Simon S. Rush | 57 | Head | Farmer | Pennsylvania |
| 78 | Nettie J. Rush | 57 | Wife | — | Pennsylvania |
| 79 | James Rush | 23 | Son | Laborer | Pennsylvania |
| 80 | John Kensey | 76 | Head | — | Pennsylvania |
Pedigree Summary
James
Gen 1 · 2 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)