FP
Frank Peterson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Winnebago-County, Illinois
Our Model Tree links this Frank Peterson across the 1920, 1930 and 1940 US Censuses in Winnebago-County, Illinois (XGBoost, ~Confirmed), with identified parents Anna & Anna — first a son (b.~1913), then head of a 5-person household.
Age 27
b. ~1913
Male
Son
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Winnebago-County, Illinois |
| Surname | Peterson |
| Given Name | Frank S. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Rockford City |
| 1935 Residence (County) | Winnebago |
| Additional Details | |
| Occupation | Post maker |
| Industry | Tool Factory |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1500 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Post Maker |
| Township / Ward | Rockford City |
| Est. Birth Year | ~1913 |
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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Frank | Age | Birth yr |
|---|---|---|---|---|
| Amy Peterson | Daughter | — | 37 | ~1903 |
| Frank Peterson | Head | — | 68 | ~1872 |
| Raymond Peterson | Son | — | 32 | ~1908 |
| Frank Peterson | Son | — | 27 | ~1913 |
| Anna Peterson | Spouse | — | 69 | ~1871 |
Census Appearances
1920
Winnebago, Illinois
Son, age 7
Winnebago, Illinois · implied b. ~1913 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Peterson |
| Given Name | Frankie J |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 7 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Winnebago, Illinois
Son, age 17
Winnebago, Illinois · implied b. ~1913 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Peterson |
| Given Name | Frankie G |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Winnebago-County, Illinois
Son, age 27
Winnebago-County, Illinois · implied b. ~1913 — 5 household members
| Surname | Peterson |
| Given Name | Frank S. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Rockford City |
| 1935 Residence (County) | Winnebago |
| Occupation | Post maker |
| Industry | Tool Factory |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1500 |
| Highest Grade | Hs 4 |
| 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 Frank Peterson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Anna Peterson (~0.92 confidence) and mother Anna Peterson (~0.92 confidence) and father Frank Peterson (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Anna Peterson
b. ~1871
Source mother
● Household
· direct · ~0.92
Mother
Anna Peterson
b. ~1871
Source mother
● Household
· direct · ~0.92
Father
Frank Peterson
b. ~1871
Source father
● Household
· direct · ~0.92
This person
Anchor record
Frank Peterson
Son · 1940 · age 27 · b. ~1913 · Illinois
★ You are viewing this record
Sibling
Amy Peterson
Sibling · 1940 · age 37
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Raymond Peterson
Sibling · 1940 · age 32
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-t0627-00915-00082)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Marion Beleman | 45 | Wife | — | Nebraska |
| 42 | John Beleman | 14 | Son | — | Illinois |
| 43 | Mary Lou Beleman | 12 | Daughter | — | Illinois |
| 44 | Herman Buerger | 34 | Lodger | — | Wisconsin |
| 45 | Harry W. Johnson | 49 | Head | Contractor | Sweden |
| 46 | Ruth G. Johnson | 49 | Wife | — | Sweden |
| 47 | Richard E. Johnson | 23 | Son | — | Illinois |
| 48 | Ruth A. Johnson | 15 | Daughter | — | Illinois |
| 49 | Robert Johnson | 12 | Son | — | Illinois |
| 50 | Frederick Johnson | 7 | Son | — | Illinois |
| 51 | Frank O. Tripp | 76 | Father-in-law | — | Sweden |
| 52 | Henry Roost | 49 | Head | Officer | Illinois |
| 53 | Eldora Roost | 48 | Wife | — | Illinois |
| 54 | Mary L. Roost | 20 | Daughter | — | Illinois |
| 55 | Eugene Roost | 17 | Son | — | Illinois |
| 56 | Carol Roost | 16 | Daughter | — | Illinois |
| 57 | Millard Brolin | 75 | Head | Officer | Sweden |
| 58 | Augusta C. Brolin | 72 | Wife | — | Sweden |
| 59 | Ellwood G. Brolin | 40 | Son | Engineer | Illinois |
| 60 | Carl R. Brolin | 34 | Son | — | Illinois |
| 61 | Harriet V. Brolin | 30 | Daughter | Administrator | Illinois |
| 62 | Amanda Magnuson | 75 | Sister-in-law | — | Sweden |
| 63 | Frank O. Peterson | 68 | Head | — | Sweden |
| 64 | Anna S. Peterson | 69 | Wife | — | Sweden |
| 65 | Raymond G. Peterson | 32 | Son | Office Work | Illinois |
| 66 | Frank S. Peterson THIS PERSON | 27 | Son | Post Maker | Illinois |
| 67 | Amy Peterson | 37 | Daughter | Clerk | Illinois |
| 68 | Charles A. Crosby | 79 | Head | — | Illinois |
| 69 | Alpharetta Crosby | 78 | Wife | — | New York |
| 70 | Thomas A. Simons | 47 | Son-in-law | — | Illinois |
| 71 | Daisy C. Simons | 51 | Daughter | — | Illinois |
| 72 | Eric Swenson | 33 | Head | Salesman | Sweden |
| 73 | Astrid Swenson | 26 | Wife | Operator (Tel) | Illinois |
| 74 | Ida Millard | 72 | Head | — | New York |
| 75 | Meredith Steele | 25 | Lodger | Clerk | Michigan |
| 76 | Chester Penonc | 40 | Head | Draftsman | Illinois |
| 77 | Marylynn Penonc | 10 | Daughter | — | Illinois |
| 78 | Ida J. Nordquist | 73 | Mother-in-law | — | Sweden |
| 79 | Bjarne Swenson | 40 | Head | Tool Maker | Norway |
| 80 | Elsie Swenson | 33 | Wife | — | Illinois |
Related Census Records
Pedigree Summary
Frank + 2 siblings
Gen 1 · 3 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)