FP
Florence Peterson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Florence Peterson across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed), with identified parents Sam & William — first a spouse (b.~1919), then head of a 3-person household.
Age 21
b. ~1919
Female
Spouse
Born: Illinois
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Peterson |
| Given Name | Florence |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 21 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | No H-4 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Chicago |
| Est. Birth Year | ~1919 |
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 Florence | Age | Birth yr |
|---|---|---|---|---|
| Elmer Peterson | Head | — | 34 | ~1906 |
| Florence Peterson | Spouse | — | 21 | ~1919 |
| Ronald Peterson | Son | — | 5 | ~1935 |
Census Appearances
1920
Cook, Illinois
Daughter, age 1
Cook, Illinois · implied b. ~1919 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Peterson |
| Given Name | Florence |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Occupation | none |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Cook, Illinois
Daughter, age 11
Cook, Illinois · implied b. ~1919 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Petterson |
| Given Name | Florence |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Spouse, age 21
Cook-County, Illinois · implied b. ~1919 — 3 household members
| Surname | Peterson |
| Given Name | Florence |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 21 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Income (1939) | 0 |
| Highest Grade | No H-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 Florence Peterson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Sam Peterson (~0.92 confidence) and father William Petterson (~0.92 confidence) and mother Bessie Peterson (~0.92 confidence) and mother Lilly Petterson (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Sam Peterson
b. ~1863
Source father
● Household
· direct · ~0.92
Father
William Petterson
b. ~1868
Source father
● Household
· direct · ~0.92
Mother
Bessie Peterson
b. ~1893
Source mother
● Household
· direct · ~0.92
Mother
Lilly Petterson
b. ~1872
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Florence Peterson
Spouse · 1940 · age 21 · b. ~1919 · 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-t0627-01020-00699)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Elmer L. Peterson | 34 | Head | Musician | Illinois |
| 2 | Florence Peterson THIS PERSON | 21 | Wife | — | Illinois |
| 3 | Ronald E. Peterson | 5 | Son | — | Illinois |
| 4 | Easter Valvo | 27 | Head | Timekeeper | Illinois |
| 5 | Simone Valvo | 25 | Wife | — | France |
| 6 | Simone M. Valvo | 6 | Daughter | — | Illinois |
| 7 | George W. Irving | 38 | Head | Ornithologist | Michigan |
| 8 | Irene Irving | 32 | Wife | — | Illinois |
| 9 | Harry B. Schofield | 55 | Head | Press Feeder | Rumania |
| 10 | Sadie Schofield | 49 | Wife | — | Austria |
| 11 | Goldie Schofield | 29 | Daughter | Stenographer | Illinois |
| 12 | Bernard D. Schofield | 28 | Son | Salesman | Illinois |
| 13 | Lillian M. Hahl | 36 | Head | Servant | Illinois |
| 14 | Edna E. Hahl | 35 | Sister | Bookkeeper | Illinois |
| 15 | Florence E. Heldt | 29 | Head | Stenographer | Wisconsin |
| 16 | Blanche A. Cowan | 31 | Head | Waitress | Kansas |
| 17 | Irene M. Kabaner | 20 | Partner | Waitress | Kansas |
| 18 | Arlington F. Pond | 39 | Head | Mechanic | Ohio |
| 19 | May S. Pond | 27 | Wife | — | Illinois |
| 20 | William B. Richards | 28 | Head | Stenographer | Illinois |
| 21 | Mary L. Richards | 26 | Wife | Telephone Operator | Illinois |
| 22 | Gertrude Grosscup | 42 | Head | Telephone Operator | Illinois |
| 23 | Hannah Running | 47 | Head | — | Minnesota |
| 24 | Louise C. Joseph | 28 | Head | Beautician | Alabama |
| 25 | Rosella E. Joseph | 26 | Sister | Beautician | Alabama |
| 26 | May G. Williams | 38 | Head | Statistician | Poland |
| 27 | Margaret M. Williams | 16 | Daughter | — | Illinois |
| 28 | Merna B. Amick | 33 | Head | Medical Nurse | North Dakota |
| 29 | Walter Press | 42 | Head | Salesman | Germany |
| 30 | Julia V. Press | 40 | Wife | — | Michigan |
| 31 | Fern L. Watkins | 38 | Head | Instructor | Illinois |
| 32 | Esther Olson | 34 | Partner | Payroll Clerk | Minnesota |
| 33 | Marie Stromberg | 60 | Head | Tailor | Germany |
| 34 | Elsie Hutchison | 39 | Head | Stenographer | North Dakota |
| 35 | John M. Hutchison | 11 | Son | — | Illinois |
| 36 | Gene S. Tinker | 28 | Head | Salesman | Washington |
| 37 | Helen M. Tinker | 24 | Wife | — | Minnesota |
| 38 | Ethel M. Beckman | 48 | Head | Telephone Operator | Kentucky |
| 39 | Ray A. Le Brink | 37 | Head | Salesman | Illinois |
| 40 | Margaret K. Le Brink | 38 | Wife | Stenographer | Scotland |
Pedigree Summary
Florence
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)