EP
Ethel Peterson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Ethel Peterson across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed), with identified parents Otto & Otto — first a daughter (b.~1905), then head of a 2-person household.
Age 35
b. ~1905
Female
Daughter
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Peterson |
| Given Name | Ethel |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 35 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Occupation | stenographer |
| Industry | office |
| Class of Worker | PW |
| Hours Worked | 42 |
| Income (1939) | 1200 |
| Highest Grade | H 4 |
| 1935 Residence | Same house |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Stenographer |
| Township / Ward | Chicago City |
| Est. Birth Year | ~1905 |
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.
2 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Ethel | Age | Birth yr |
|---|---|---|---|---|
| Ethel Peterson | Daughter | — | 35 | ~1905 |
| Otto Peterson | Head | — | 64 | ~1876 |
Census Appearances
1920
Cook, Illinois
Daughter, age 14
Cook, Illinois · implied b. ~1906 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Peterson |
| Given Name | Ethel |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Cook, Illinois
Daughter, age 25
Cook, Illinois · implied b. ~1905 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Peterson |
| Given Name | Ethel |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | Stenographer |
| Industry | Ornamental Iron |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Daughter, age 35
Cook-County, Illinois · implied b. ~1905 — 2 household members
| Surname | Peterson |
| Given Name | Ethel |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 35 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Occupation | stenographer |
| Industry | office |
| Class of Worker | PW |
| Hours Worked | 42 |
| Income (1939) | 1200 |
| Highest Grade | H 4 |
| 1935 Residence | Same house |
| 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 Ethel Peterson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Otto Peterson (~0.92 confidence) and father Otto Peterson (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Otto Peterson
b. ~1876
Source father
● Household
· direct · ~0.92
Father
Otto Peterson
b. ~1871
Source father
● Household
· direct · ~0.92
This person
Anchor record
Ethel Peterson
Daughter · 1940 · age 35 · b. ~1905 · 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
39 people indexed on this census page (nara:1940:m-t0627-00999-00886)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Evelyn Mastorisky | 9 | daughter | — | Illinois |
| 42 | Norman Mastorisky | 7 | son | — | Illinois |
| 43 | Richard Klapur|Klapas | 37 | head | Barber | Illinois |
| 44 | Margaret Klapur|Klapas | 37 | wife | Operator | Illinois |
| 45 | Morris Ranci|Rance | 38 | head | Tailor | Roumania |
| 46 | Pearl Ranci|Rance | 33 | wife | — | Illinois |
| 47 | Elaine Ranci|Rance | 5 | daughter | — | Illinois |
| 48 | Dora Ingram | 78 | mother-in-law | Housekeeper | Minnesota |
| 49 | Hyman Sandler | 50 | head | Tanner | Russia |
| 50 | Leah Sandler | 45 | wife | — | New York |
| 51 | Harry Sandler | 20 | son | — | Illinois |
| 52 | Jesse Pollnow | 54 | head | Stenographer | Illinois |
| 53 | Nathan Libulsky|Libulski | 44 | head | Proprietor | Russia |
| 54 | Anna Libulsky|Libulski | 40 | wife | — | Austria |
| 55 | Louis Libulsky|Libulski | 18 | son | — | Illinois |
| 56 | Dorothy Libulsky|Libulski | 14 | daughter | — | Illinois |
| 57 | Seymour Libulsky|Libulski | 13 | son | — | Illinois |
| 58 | Fay Libulsky|Libulski | 74 | mother | — | Russia |
| 59 | Dora Primack | 52 | sister | — | Russia |
| 60 | Ben Isaacson | 35 | head | Salesman | Russia |
| 61 | Marion Isaacson | 27 | wife | Saleslady | Illinois |
| 62 | Ben Rhams | 39 | head | Salesman | Illinois |
| 63 | Dorothy Rhams | 33 | wife | — | Illinois |
| 64 | Alvin Zahnen | 49 | head | Upholsterer | Illinois |
| 65 | Anna Zahnen | 46 | wife | — | Illinois |
| 66 | Hazel Zahnen | 22 | daughter | Clerk | Illinois |
| 67 | Allan Zahnen | 19 | son | Clerk | Illinois |
| 68 | Louis Richmond | 35 | head | Painter | Russia |
| 69 | Shirley Richmond | 33 | wife | — | England |
| 70 | Billie Richmond | 13 | son | — | Illinois |
| 71 | Donald Richmond | 5 | son | — | Illinois |
| 72 | (Cont'D) | None | daughter | — | — |
| 73 | Blair | 19 | son | Machine Hand | Illinois |
| 74 | Gloria | 8 | daughter | — | Illinois |
| 75 | Gustav Peterson | 42 | head | Attendant | Wisconsin |
| 76 | Martina Peterson | 38 | wife | Stenographer | Illinois |
| 77 | Hjordis Peterson | 11 | daughter | — | Illinois |
| 78 | Otto Peterson | 64 | head | Laborer | Sweden |
| 79 | Ethel Peterson THIS PERSON | 35 | daughter | Stenographer | Illinois |
Related Census Records
Pedigree Summary
Ethel
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)