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George Duncan — 1940 US Census Record
Model Tree available1940 United States Federal Census · Crawford-County, Illinois
Our Model Tree links this George Duncan across the 1920, 1930 and 1940 US Censuses in Crawford-County, Illinois (XGBoost, ~Confirmed), with identified parents Lara — first a head (b.~1899), then head of a 4-person household.
Age 41
b. ~1899
Male
Head
Born: Illinois
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Crawford-County, Illinois |
| Surname | Duncan |
| Given Name | George M. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 41 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Robinson Twp |
| 1935 Residence (County) | Crawford |
| Additional Details | |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Robinson Twp |
| Est. Birth Year | ~1899 |
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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to George | Age | Birth yr |
|---|---|---|---|---|
| George Duncan | Head | — | 41 | ~1899 |
| Peggy Duncan | Daughter | — | 13 | ~1927 |
| Mary Duncan | Spouse | — | 35 | ~1905 |
| Doris Duncan | Daughter | — | 8 | ~1932 |
Census Appearances
1920
Crawford, Illinois
Son, age 21
Crawford, Illinois · implied b. ~1899 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Duncan |
| Given Name | George M |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Occupation | Farm Laborer |
| Industry | Working out |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Crawford, Illinois
Head, age 31
Crawford, Illinois · implied b. ~1899 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Duncan |
| Given Name | George P |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 31 |
| Marital Status | Married |
| Birthplace | Illinois |
| Age at First Marriage | 27 |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Occupation | Caster |
| Industry | Pottery |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Crawford-County, Illinois
Head, age 41
Crawford-County, Illinois · implied b. ~1899 — 4 household members
| Surname | Duncan |
| Given Name | George M. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 41 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Robinson Twp |
| 1935 Residence (County) | Crawford |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
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 George Duncan across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Lara Duncan (~0.92 confidence). The pedigree spans 1 generation with 1 identified ancestor.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Lara Duncan
b. ~1873
Source mother
● Household
· direct · ~0.92
This person
Anchor record
George Duncan
Head · 1940 · age 41 · b. ~1899 · Illinois
★ 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 — Crawford-County, Illinois
Open full size
1940 US Federal Census — Crawford-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00791-00588)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Morris Hamblin | 20 | Hired hand | Laborer | Kentucky |
| 2 | Ray P. Wilson | 53 | Head | Farmer | Illinois |
| 3 | Julia A. Wilson | 52 | Wife | — | Illinois |
| 4 | Arlo O. Wilson | 24 | Son | Farmer | Illinois |
| 5 | Ruth T. Wilson | 13 | Daughter | — | Illinois |
| 6 | George M. Duncan THIS PERSON | 41 | Head | — | Illinois |
| 7 | Mary M. Duncan | 35 | Wife | — | Illinois |
| 8 | Peggy L. Duncan | 13 | Daughter | Senior Typist | Illinois |
| 9 | Doris L. Duncan | 8 | Daughter | — | Illinois |
| 10 | Jesse F. Case | 45 | Head | Laborer | Illinois |
| 11 | John B. Goff | 44 | Head | Pumper | Illinois |
| 12 | Lula I. Goff | 39 | Wife | — | Indiana |
| 13 | Alice Geneva Goff | 20 | Daughter | — | Illinois |
| 14 | Ruthie D. Goff | 16 | Daughter | Waitress | Illinois |
| 15 | Orville L. Goff | 15 | Son | — | Illinois |
| 16 | Opal M. Goff | 12 | Daughter | — | Illinois |
| 17 | Wilma J. Goff | 10 | Daughter | — | Illinois |
| 18 | Charles E. Goff | 8 | Son | — | Illinois |
| 19 | Harold L. Goff | 4 | Son | — | Illinois |
| 20 | Earl L. Goff | 1 | Son | — | Illinois |
| 21 | Marshall E. Stevens | 28 | Head | Laborer | Illinois |
| 22 | Margie T. Stevens | 28 | Wife | — | Illinois |
| 23 | Joyce A. Stevens | 3 | Daughter | — | Illinois |
| 24 | Calvin V. Barrick | 65 | Head | — | Illinois |
| 25 | Ralph E. Barrick | 21 | Nephew | Clearing Gang | Illinois |
| 26 | Bert Rowe | 50 | Head | Laborer | Illinois |
| 27 | Lillie W. Rowe | 44 | Wife | — | Illinois |
| 28 | Margaret L. Rowe | 26 | Daughter | — | Illinois |
| 29 | James E. Rowe | 14 | Son | — | Illinois |
| 30 | George H. Frye | 64 | Head | Farmer | Illinois |
| 31 | Mary F. Frye | 63 | Wife | — | Illinois |
| 32 | Robert W. Frye | 15 | Grandson | — | Illinois |
| 33 | Edgar P. Chilcote | 37 | Head | Stillman | Kansas |
| 34 | Mary E. Chilcote | 37 | Wife | — | Texas |
| 35 | Edgar P. Chilcote | 16 | Son | — | Oklahoma |
| 36 | Michael R. Chilcote | 15 | Son | — | Texas |
| 37 | Billy R. Chilcote | 13 | Son | — | Arkansas |
| 38 | Paul E. Hill | 33 | Head | Grader | Arkansas |
| 39 | Arlie E. Hill | 33 | Wife | — | Illinois |
| 40 | Gail L. Hill | 13 | Son | — | Indiana |
Pedigree Summary
George
Gen 1 · 1 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)