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Theodore Anderson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Theodore Anderson across the 1900, 1910, 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a head (b.~1881), then head of a 3-person household.
Age 59
b. ~1881
Male
Head
Born: Sweden
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Anderson |
| Given Name | Theodore |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 59 |
| Marital Status | Married |
| Birthplace | Sweden |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Naturalization Status | Naturalized |
| Additional Details | |
| Class of Worker | 0 |
| Hours Worked | 0 |
| Income (1939) | 200 |
| Highest Grade | No 8 |
| 1935 Residence | Same Place |
| Birth Country | Sweden |
| Birthplace (normalized) | sweden |
| Township / Ward | Chicago |
| Est. Birth Year | ~1881 |
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 Theodore | Age | Birth yr |
|---|---|---|---|---|
| Theodore Anderson | Head | — | 59 | ~1881 |
| Ingrid Anderson | Spouse | — | 58 | ~1882 |
| Russell Anderson | Son | — | 23 | ~1917 |
Census Appearances
1900
Cook, Illinois
Other, age 22
Cook, Illinois · implied b. ~1878 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Anderson |
| Given Name | Theodore |
| Relationship to Head | Servant |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Sweden |
| Birth Month | May |
| Birth Year | 1878 |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | Servant |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth Country | Sweden |
| Birthplace (normalized) | sweden |
1910
Cook, Illinois
Head, age 30
Cook, Illinois · implied b. ~1880 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Anderson |
| Given Name | Theodore |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 30 |
| Marital Status | Married |
| Birthplace | Sweden |
| Years Married | 1 |
| Year of Immigration | 1902 |
| Naturalization Status | First papers filed |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | Machinist |
| Industry | Motor |
| Birth Country | Sweden |
| Birthplace (normalized) | sweden |
1920
Cook, Illinois
Head, age 39
Cook, Illinois · implied b. ~1881 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Anderson |
| Given Name | Theodore |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 39 |
| Marital Status | Married |
| Birthplace | Sweden |
| Year of Immigration | 1897 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | Brickmason |
| Industry | Contractors |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Swedish |
| Home Owned/Rented | R |
| Birth Country | Sweden |
| Year of Naturalization | 1902 |
| Birthplace (normalized) | sweden |
1930
Cook, Illinois
Head, age 49
Cook, Illinois · implied b. ~1881 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Anderson |
| Given Name | Theodore |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 49 |
| Marital Status | Married |
| Birthplace | Sweden |
| Naturalization Status | Naturalized |
| Year of Immigration | 1906 |
| Age at First Marriage | 35 |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | Brick Layer |
| Industry | Building Trade |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | Swedish |
| Home Owned/Rented | O |
| Home Value / Rent | 25000 |
| Radio Set | R |
| Birth Country | Sweden |
| Birthplace (normalized) | sweden |
1940
Cook-County, Illinois
Head, age 59
Cook-County, Illinois · implied b. ~1881 — 3 household members
| Surname | Anderson |
| Given Name | Theodore |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 59 |
| Marital Status | Married |
| Birthplace | Sweden |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Naturalization Status | Naturalized |
| Class of Worker | 0 |
| Hours Worked | 0 |
| Income (1939) | 200 |
| Highest Grade | No 8 |
| 1935 Residence | Same Place |
| Birth Country | Sweden |
| Birthplace (normalized) | sweden |
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 Theodore Anderson across 5 US Census years (1900, 1910, 1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Theodore Anderson
Head · 1940 · age 59 · b. ~1881 · 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 — Cook-County, Illinois
Open full size
1940 US Federal Census — Cook-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00995-00375)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Robert Swanson | 22 | Son | Store Manager | Illinois |
| 2 | Eugene Swanson | 19 | Son | Apprentice Sheet Metal | Illinois |
| 3 | Marjorie Swanson | 17 | Daughter | — | Illinois |
| 4 | Raymond Swanson | 11 | Son | — | Illinois |
| 5 | Donald Swanson | 10 | Son | — | Illinois |
| 6 | Orlando J. Lillervig | 44 | Head | Branch Manager | Minnesota |
| 7 | Elsie Lillervig | 39 | Wife | — | England |
| 8 | James Lillervig | 11 | Son | — | Michigan |
| 9 | Lloyd Lillervig | 7 | Son | — | Michigan |
| 10 | Bertha Lillervig | 23 | Sister | Under-Graduate Nurse | Minnesota |
| 11 | Elwood Vanebrook | 38 | Head | Dentist | Michigan |
| 12 | Elizabeth Vanebrook | 40 | Wife | — | Illinois |
| 13 | Janet Vanebrook | 15 | Daughter | — | Illinois |
| 14 | Mary Mahoney | 64 | Mother-in-law | Housework | Illinois |
| 15 | Leo Baer | 62 | Head | Dept. Manager | Wisconsin |
| 16 | Rose Baer | 59 | Wife | — | Indiana |
| 17 | Leonora Baer | 35 | Daughter | Stenographer | Illinois |
| 18 | Marvin Baer | 27 | Son | Switchboard Wiring | Illinois |
| 19 | Leon Baer | 33 | Son | Machinist | Illinois |
| 20 | James Baer | 12 | Grandson | — | Illinois |
| 21 | Ralph Baer | 9 | Grandson | — | Illinois |
| 22 | Victor Hagblom | 50 | Head | Tool & Die Maker | Finland |
| 23 | Hilda Hagblom | 52 | Wife | — | Sweden |
| 24 | Walter Rausch | 28 | Head | Machinist | Germany |
| 25 | Elsie Rausch | 25 | Wife | — | Illinois |
| 26 | Carole Rausch | 5 | Daughter | — | Illinois |
| 27 | Theodore Anderson THIS PERSON | 59 | Head | — | Sweden |
| 28 | Ingrid Anderson | 58 | Wife | — | Sweden |
| 29 | Russell Anderson | 23 | Son | — | Illinois |
| 30 | Leslie Ostberg | 38 | Head | Clergyman | Kansas |
| 31 | Dora Ostberg | 37 | Wife | — | Wisconsin |
| 32 | Constance Ostberg | 8 | Daughter | — | Pennsylvania |
| 33 | John W. Ostberg | 1 | Son | — | Illinois |
| 34 | Barbara Philgren | 12 | Niece | — | Washington |
| 35 | Here Ends Block 15 And Begins Block 16 | None | — | — | — |
| 36 | Emil Lorander | 53 | Head | — | Denmark |
| 37 | Ida Lorander | 55 | Wife | — | Illinois |
| 38 | Lyle Lewis | 36 | Head | Ledger Clerk | Illinois |
| 39 | Louise Lewis | 32 | Wife | — | Wisconsin |
| 40 | Charles Mccarthy | 46 | Head | Copy Holder | 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)