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Charles Duncan — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Lake-County, Illinois
Our Model Tree links this Charles Duncan across the 1920, 1930 and 1940 US Censuses in Lake-County, Illinois (XGBoost, ~Confirmed) — first a head (b.~1869), then head of a 3-person household.
Age 71
b. ~1869
Male
Head
Born: Illinois
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Lake-County, Illinois |
| Surname | Duncan |
| Given Name | Charles |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 71 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Beach |
| 1935 Residence (County) | Lake |
| Additional Details | |
| Occupation | Caretaker |
| Industry | Estate |
| Class of Worker | PW |
| Hours Worked | 68 |
| Income (1939) | 780 |
| Highest Grade | 8 |
| 1935 Residence | Same Place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Caretaker |
| Township / Ward | Beach |
| Est. Birth Year | ~1869 |
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 Charles | Age | Birth yr |
|---|---|---|---|---|
| Jessie Duncan | Daughter | — | 28 | ~1912 |
| Bertha Duncan | Spouse | — | 68 | ~1872 |
| Charles Duncan | Head | — | 71 | ~1869 |
Census Appearances
1920
Lake, Illinois
Head, age 51
Lake, Illinois · implied b. ~1869 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Duncan |
| Given Name | Charles F. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 51 |
| Marital Status | Married |
| Birthplace | Illinois |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Scotland |
| Occupation | Manager |
| Industry | General farm |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Scotch |
| Home Owned/Rented | R |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Lake, Illinois
Head, age 61
Lake, Illinois · implied b. ~1869 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Duncan |
| Given Name | Charles |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 61 |
| Marital Status | Married |
| Birthplace | Illinois |
| Age at First Marriage | 22 |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Scotland |
| Occupation | Stationary Engineer |
| Industry | Abattoir Product Industry |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Home Value / Rent | 5000 |
| Radio Set | R |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Lake-County, Illinois
Head, age 71
Lake-County, Illinois · implied b. ~1869 — 3 household members
| Surname | Duncan |
| Given Name | Charles |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 71 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Beach |
| 1935 Residence (County) | Lake |
| Occupation | Caretaker |
| Industry | Estate |
| Class of Worker | PW |
| Hours Worked | 68 |
| Income (1939) | 780 |
| Highest Grade | 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 Charles Duncan across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Charles Duncan
Head · 1940 · age 71 · b. ~1869 · Illinois
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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 — Lake-County, Illinois
Open full size
1940 US Federal Census — Lake-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00828-00213)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Light | None | — | — | — |
| 42 | Isaac Mill | 25 | Head | Salesman | Illinois |
| 43 | Bella Mill | 25 | Wife | — | Illinois |
| 44 | Mary Mill | 17 | Sister | — | Illinois |
| 45 | Fred Brooks | 33 | Head | Salesman | England |
| 46 | Beatrice Brooks | 28 | Wife | — | California |
| 47 | Florence Brooks | 5 | Daughter | — | Illinois |
| 48 | Joseph Brooks | 4 | Son | — | Illinois |
| 49 | Paul Beem | 38 | Head | Pressman | California |
| 50 | Beatrice Beem | 37 | Wife | — | Indiana |
| 51 | Velma Beem | 13 | Daughter | — | Illinois |
| 52 | Pauline Beem | 12 | Daughter | — | Illinois |
| 53 | Paul Jr. Beem | 10 | Son | — | Illinois |
| 54 | Richard Wright | 35 | Head | Operator | Illinois |
| 55 | Beulah Wright | 28 | Wife | — | Idaho |
| 56 | Richard Jr. Wright | 12 | Son | — | Illinois |
| 57 | Donald Wright | 9 | Son | — | Illinois |
| 58 | Eleanor Ford | 19 | Lodger | — | Illinois |
| 59 | Charles Duncan THIS PERSON | 71 | Head | Caretaker | Illinois |
| 60 | Bertha Duncan | 68 | Wife | — | Illinois |
| 61 | Jessie Duncan | 28 | Daughter | Stenographer | Illinois |
| 62 | George Dalziel | 41 | Head | Brick Layer | Illinois |
| 63 | Olive Dalziel | 43 | Wife | — | Illinois |
| 64 | Ann Dalziel | 13 | Daughter | — | Illinois |
| 65 | William Dalziel | 7 | Son | — | Illinois |
| 66 | William S. Jones | 42 | Head | Servant | Illinois |
| 67 | Muriel Jones | 49 | Wife | Housework | Illinois |
| 68 | John Honeyfield | 47 | Head | Servant | Indiana |
| 69 | Bernice Honeyfield | 51 | Wife | — | Wisconsin |
| 70 | Annette Honeyfield | 19 | Daughter | Mail Cutter | Wisconsin |
| 71 | Shirley Honeyfield | 13 | Daughter | — | Wisconsin |
| 72 | Leon Liozunas | 56 | Head | Molder | Lithuania |
| 73 | Anna Liozunas | 53 | Wife | — | Lithuania |
| 74 | Lillian Liozunas | 22 | Daughter | Stenographer | Illinois |
| 75 | Melton Channell | 34 | Head | Machine Hand | Georgia |
| 76 | Agnes Channell | 31 | Wife | — | Georgia |
| 77 | Fleures Channell | 12 | Son | — | Illinois |
| 78 | Vernon Richardson | 40 | Head | Operator | Minnesota |
| 79 | Esther Richardson | 43 | Wife | — | Illinois |
| 80 | Paul Richardson | 13 | Son | — | Illinois |
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)