EP
Ethel Peterson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Winnebago-County, Illinois
Our Model Tree links this Ethel Peterson across the 1920, 1930 and 1940 US Censuses in Winnebago-County, Illinois (XGBoost, ~Confirmed), with identified parents Frank & John — first a daughter (b.~1900), then head of a 4-person household.
Age 40
b. ~1900
Female
Daughter
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Winnebago-County, Illinois |
| Surname | Peterson |
| Given Name | Ethel |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 40 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Rockford City |
| 1935 Residence (County) | Winnebago |
| Additional Details | |
| Occupation | Stenographer |
| Industry | Gas + Elec Co |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1200 |
| Highest Grade | H4 30 |
| 1935 Residence | Same House |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Stenographer |
| Township / Ward | Rockford City |
| Est. Birth Year | ~1900 |
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 Ethel | Age | Birth yr |
|---|---|---|---|---|
| Esther Nystrom | Other | — | 60 | ~1880 |
| Anna Peterson | Head | — | 78 | ~1862 |
| Ethel Peterson | Daughter | — | 40 | ~1900 |
| Henry Peterson | Son | — | 47 | ~1893 |
Census Appearances
1920
Winnebago, Illinois
Daughter, age 20
Winnebago, Illinois · implied b. ~1900 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Peterson |
| Given Name | Ethel |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | stenographer |
| Industry | factory office |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Winnebago, Illinois
Daughter, age 32
Winnebago, Illinois · implied b. ~1898 — 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 | 32 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | Stenographer |
| Industry | Petty Shop |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Winnebago-County, Illinois
Daughter, age 40
Winnebago-County, Illinois · implied b. ~1900 — 4 household members
| Surname | Peterson |
| Given Name | Ethel |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 40 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Rockford City |
| 1935 Residence (County) | Winnebago |
| Occupation | Stenographer |
| Industry | Gas + Elec Co |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1200 |
| Highest Grade | H4 30 |
| 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 Frank Peterson (~0.92 confidence) and father John Peterson (~0.92 confidence) and mother Anna Peterson (~0.92 confidence) and mother Anna Peterson (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Frank Peterson
b. ~1866
Source father
● Household
· direct · ~0.92
Father
John Peterson
b. ~1842
Source father
● Household
· direct · ~0.92
Mother
Anna Peterson
b. ~1862
Source mother
● Household
· direct · ~0.92
Mother
Anna Peterson
b. ~1862
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Ethel Peterson
Daughter · 1940 · age 40 · b. ~1900 · Illinois
★ You are viewing this record
Sibling
Henry Peterson
Sibling · 1940 · age 47
Source co-child of head (derived)
● Co-child · derived · ~0.88
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Winnebago-County, Illinois
Open full size
1940 US Federal Census — Winnebago-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00912-00640)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | George Sodergren | 62 | Head | Furniture Maker | Illinois |
| 2 | Clarence Sodergren | 60 | Brother | — | Illinois |
| 3 | Carl Sodergren | 58 | Brother | Painter | Illinois |
| 4 | Frank Sodergren | 51 | Brother | Machinist | Illinois |
| 5 | Helen Sodergren | 45 | Sister | Clerk | Illinois |
| 6 | Gordon Lofgren | 23 | Head | Machinist | Michigan |
| 7 | Burnetta Lofgren | 23 | Wife | Bookkeeper | Illinois |
| 8 | Oscar W. Anderson | 77 | Head | — | Sweden |
| 9 | Annie Anderson | 70 | Wife | — | Sweden |
| 10 | Anna Peterson | 78 | Head | — | Sweden |
| 11 | Henry Peterson | 47 | Son | Pattern Maker | Illinois |
| 12 | Ethel Peterson THIS PERSON | 40 | Daughter | Stenographer | Illinois |
| 13 | Esther Nystrom | 60 | Lodger | Clerk | Sweden |
| 14 | Leland A. Bowman | 53 | Head | Realtor | South Dakota |
| 15 | Hazel C. Bowman | 46 | Wife | Bookkeeper | Illinois |
| 16 | Oskar Lindstrom | 74 | Father in law | — | Sweden |
| 17 | Emma Lindstrom | 74 | Mother in law | — | Sweden |
| 18 | Richard H. Lindblom | 54 | Head | Proprietor | Sweden |
| 19 | Laura Lindblom | 53 | Wife | — | Illinois |
| 20 | Robert G. Lindblom | 24 | Son | Bar Tender | Minnesota |
| 21 | Laura Hultquist | 67 | Head | — | Illinois |
| 22 | Josie Ostrom | 66 | Head | Seamstress | Illinois |
| 23 | Velma Ostrom | 54 | Sister | Clerk | Illinois |
| 24 | Phila Irving Gorman | 40 | Lodger | Truck Driver | Illinois |
| 25 | Helma Lundquist | 56 | Head | — | Illinois |
| 26 | Kathryn Lundquist | 19 | Daughter | — | Illinois |
| 27 | Mauritz Sterner | 38 | Head | Fireman | Illinois |
| 28 | Olive Sterner | 30 | Wife | — | Illinois |
| 29 | Eleanor Sterner | 5 | Daughter | — | Indiana |
| 30 | Janice Sterner | 2 | Daughter | — | Indiana |
| 31 | Gust Anderson | 65 | Lodger | Contractor | Sweden |
| 32 | Howard Keyes | 33 | Head | Tool Maker | South Dakota |
| 33 | Ruth Keyes | 35 | Wife | — | Illinois |
| 34 | Joan Keyes | 4 | Daughter | — | Illinois |
| 35 | Edith Anderson | 42 | Head | Beauty Operator | Illinois |
| 36 | Charles King | 20 | Son | Assembler | Illinois |
| 37 | Shirley King | 20 | Daughter | Telephone Operator | Illinois |
| 38 | John Couch | 39 | Head | Weaver | Georgia |
| 39 | Anna Couch | 40 | Wife | Kitchen Helper | Minnesota |
| 40 | Robert Van Ness | 14 | Step son | — | Illinois |
Related Census Records
Pedigree Summary
Ethel + 1 sibling
Gen 1 · 4 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)