JD
James Duncan — 1940 US Census Record
Model Tree available1940 United States Federal Census · Monroe-County, New York
Our Model Tree links this James Duncan across the 1920, 1930 and 1940 US Censuses in Monroe-County, New York (XGBoost, ~Confirmed), with identified parents James & Margaret — first a head (b.~1887), then head of a 3-person household.
Age 53
b. ~1887
Male
Head
Born: Scotland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Monroe-County, New York |
| Surname | Duncan |
| Given Name | James |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 53 |
| Marital Status | Married |
| Birthplace | Scotland |
| 1935 Residence (City) | Riga |
| 1935 Residence (County) | Monroe |
| Naturalization Status | Naturalized |
| Additional Details | |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | OA |
| Hours Worked | 98 |
| Income (1939) | 0 |
| Highest Grade | H-2 |
| 1935 Residence | New York |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
| Occupation | Farmer |
| Township / Ward | Riga |
| Est. Birth Year | ~1887 |
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 James | Age | Birth yr |
|---|---|---|---|---|
| Jane Duncan | Daughter | — | 16 | ~1924 |
| James Duncan | Head | — | 53 | ~1887 |
| Fay Duncan | Spouse | — | 40 | ~1900 |
Census Appearances
1920
Monroe, New …
Son, age 31
Monroe, New York · implied b. ~1889 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Duncan |
| Given Name | James T |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 31 |
| Marital Status | Single |
| Birthplace | Scotland |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Scotland |
| Occupation | Farm Laborer |
| Industry | Home farm |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Scotch |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
1930
Monroe, New …
Head, age 42
Monroe, New York · implied b. ~1888 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Duncan |
| Given Name | James A. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 42 |
| Marital Status | Married |
| Birthplace | Scotland |
| Naturalization Status | Naturalized |
| Year of Immigration | 1890 |
| Age at First Marriage | 33 |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Scotland |
| Occupation | Farmer |
| Industry | General Farm |
| Class of Worker | OA |
| Can Read/Write | Yes |
| Mother Tongue | Scotch |
| Home Owned/Rented | R |
| Veteran | No |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
1940
Monroe-County, New …
Head, age 53
Monroe-County, New York · implied b. ~1887 — 3 household members
| Surname | Duncan |
| Given Name | James |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 53 |
| Marital Status | Married |
| Birthplace | Scotland |
| 1935 Residence (City) | Riga |
| 1935 Residence (County) | Monroe |
| Naturalization Status | Naturalized |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | OA |
| Hours Worked | 98 |
| Income (1939) | 0 |
| Highest Grade | H-2 |
| 1935 Residence | New York |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
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 James Duncan (~0.92 confidence) and mother Margaret Duncan (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
James Duncan
b. ~1862
Source father
● Household
· direct · ~0.92
Mother
Margaret Duncan
b. ~1862
Source mother
● Household
· direct · ~0.92
This person
Anchor record
James Duncan
Head · 1940 · age 53 · b. ~1887 · New York
★ 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 — Monroe-County, New York
Open full size
1940 US Federal Census — Monroe-County, New York
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02680-00644)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | James Duncan THIS PERSON | 53 | Head | Farmer | Scotland |
| 2 | Fay Duncan | 40 | Wife | — | New York |
| 3 | Jane Duncan | 16 | Daughter | — | New York |
| 4 | Max Lozoroski | 48 | Head | Janitor | Austria |
| 5 | Catherine Lozoroski | 45 | Wife | — | Austria |
| 6 | Peter Lozoroski | 24 | Son | Teacher | New York |
| 7 | Anne Lozoroski | 23 | Daughter | Nurse | New York |
| 8 | Theresa Lozoroski | 21 | Daughter | Waitress | New York |
| 9 | Stella Lozoroski | 18 | Daughter | Waitress | New York |
| 10 | John Lozoroski | 16 | Son | — | New York |
| 11 | Mary Lozoroski | 15 | Daughter | — | New York |
| 12 | Charles Lozoroski | 10 | Son | — | New York |
| 13 | Valentine Woitura | 45 | Head | Farmer | Poland |
| 14 | Viola Woitura | 41 | Wife | — | Poland |
| 15 | Edward Woitura | 18 | Son | — | New York |
| 16 | Frances Woitura | 15 | Daughter | — | New York |
| 17 | Vincent Woitura | 12 | Son | — | New York |
| 18 | Mary Woitura | 10 | Daughter | — | New York |
| 19 | William Woitura | 1 | Son | — | New York |
| 20 | Joel D Carver | 73 | Head | Farmer | New York |
| 21 | Mabel Carver | 62 | Wife | — | Michigan |
| 22 | Lyman Carver | 38 | Son | Farmer | New York |
| 23 | — | None | — | — | — |
| 24 | Carl Forbes | 43 | Head | Industrial Engineer | Ohio |
| 25 | Hazel D Forbes | 42 | Wife | — | Ohio |
| 26 | Edward W Forbes | 19 | Son | Student | New York |
| 27 | Kenneth Forbes | 14 | Son | Student | New York |
| 28 | Mary Jameson | 67 | Mother | — | West Virginia |
| 29 | Emerson D Kendall | 74 | Head | Farmer | New York |
| 30 | Irene Kendall | 67 | Wife | — | New York |
| 31 | Charles Kendall | 41 | Son | Farmer | New York |
| 32 | Ralph L Kendall | 33 | Son | Dentist | New York |
| 33 | Ralph A Sage | 42 | Head | Meat Packer | New York |
| 34 | Verna W Sage | 38 | Wife | — | England |
| 35 | C. Ernest Sage | 14 | Son | — | New York |
| 36 | Doris E Sage | 9 | Daughter | — | New York |
| 37 | Clement O Makowski | 62 | Head | Farmer | Russia |
| 38 | Mary Makowski | 52 | Wife | — | Pennsylvania |
| 39 | Helen Makowski | 15 | Daughter | — | New York |
| 40 | Florence Makowski | 13 | Daughter | — | New York |
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)