BP
Bertha Peterson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Bertha Peterson across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a head (b.~1888), then head of a 4-person household.
Age 52
b. ~1888
Female
Head
Born: Illinois
Widowed
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Peterson |
| Given Name | Bertha |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 52 |
| Marital Status | Widowed |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | 7 |
| 1935 Residence | Same Place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Chicago |
| Est. Birth Year | ~1888 |
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 Bertha | Age | Birth yr |
|---|---|---|---|---|
| Bertha Peterson | Head | — | 52 | ~1888 |
| Andrew Peterson | Son | — | 28 | ~1912 |
| Henry Peterson | Son | — | 32 | ~1908 |
| Dorothy Peterson | Daughter | — | 24 | ~1916 |
Census Appearances
1920
Cook, Illinois
Spouse, age 32
Cook, Illinois · implied b. ~1888 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Peterson |
| Given Name | Bertha |
| Relationship to Head | wife |
| Sex | F |
| Color / Race | White |
| Age | 32 |
| Marital Status | Married |
| Birthplace | Illinois |
| Father's Birthplace | Germany |
| Mother's Birthplace | Germany |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Cook, Illinois
Spouse, age 42
Cook, Illinois · implied b. ~1888 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Peterson |
| Given Name | Bertha |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 42 |
| Marital Status | Married |
| Birthplace | Illinois |
| Age at First Marriage | 20 |
| Father's Birthplace | Germany |
| Mother's Birthplace | Germany |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Head, age 52
Cook-County, Illinois · implied b. ~1888 — 4 household members
| Surname | Peterson |
| Given Name | Bertha |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 52 |
| Marital Status | Widowed |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Income (1939) | 0 |
| Highest Grade | 7 |
| 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 Bertha Peterson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Bertha Peterson
Head · 1940 · age 52 · b. ~1888 · 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 — 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-t0627-01011-00830)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Clara Pfau | 40 | Wife | — | Germany |
| 42 | Hildegarde Pfau | 6 | Daughter | — | Illinois |
| 43 | Ernest Pfau | 34 | Lodger | Four Gear Pan Adjuster | Germany |
| 44 | Bertha Peterson THIS PERSON | 52 | Head | — | Illinois |
| 45 | Henry Peterson | 32 | Son | Business Agent | Illinois |
| 46 | Andrew Peterson | 28 | Son | Machinist | Illinois |
| 47 | Dorothy Peterson | 24 | Daughter | Assembler | Illinois |
| 48 | Henry Hofstetter | 46 | Head | Salesman | Illinois |
| 49 | Ella Hofstetter | 40 | Wife | — | Illinois |
| 50 | Helen Hofstetter | 12 | Daughter | — | Illinois |
| 51 | Walter Hofstetter | 24 | Brother-in-law | Mechanic | Illinois |
| 52 | Leo Link | 38 | Head | Shipping Clerk | Germany |
| 53 | Adeline Link | 35 | Wife | Seamstress | Germany |
| 54 | — | None | — | — | — |
| 55 | John Leise | 71 | Head | — | Hungary |
| 56 | Susanna Leise | 64 | Wife | — | Hungary |
| 57 | William Leise | 35 | Son | Baker | Hungary |
| 58 | Margaret Leise | 44 | Daughter | Butter | Hungary |
| 59 | Anton Leise | 23 | Grandson | Machine Hand | Hungary |
| 60 | Anna Leise | 19 | Daughter-in-law | Clerk | Romania |
| 61 | William Seifert | 29 | Head | Motorman | Illinois |
| 62 | Elsie Seifert | 26 | Wife | — | Illinois |
| 63 | Auguste Fischer | 53 | Head | Machinist | Illinois |
| 64 | Louise Fischer | 49 | Wife | — | Illinois |
| 65 | Charles H. Fischer | 26 | Son | Machinist Apprentice | Illinois |
| 66 | Jack B. Fischer | 21 | Son | Welder | Illinois |
| 67 | Ludwig Bergant | 32 | Head | Compositor | Minnesota |
| 68 | Caroline Bergant | 32 | Wife | — | Jugo Slavia |
| 69 | Joan Bergant | 7 | Daughter | — | Illinois |
| 70 | Robert Bergant | 3 | Son | — | Illinois |
| 71 | Peter Denny | 69 | Head | Sheet Metal Worker | Germany |
| 72 | Anna Denny | 60 | Wife | — | Illinois |
| 73 | Mary E. Munger | 67 | Head | — | Illinois |
| 74 | Allen Moore | 67 | Lodger | Auditor | Michigan |
| 75 | Emil Wolter | 50 | Head | Paper Cutter | Germany |
| 76 | Catherine Wolter | 50 | Wife | — | Austria |
| 77 | Emil (Jr) Wolter | 25 | Son | — | Illinois |
| 78 | Harold Anderson | 25 | Head | Butter | Wisconsin |
| 79 | Isabelle Anderson | 24 | Wife | — | Indiana |
| 80 | Barbara Anderson | 4 | Daughter | — | Wisconsin |
Related Census Records
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)