EP
Ernest Peterson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Ernest Peterson across the 1910, 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed), with identified parents John & Mathilda — first a head (b.~1904), then head of a 6-person household.
Age 36
b. ~1904
Male
Head
Born: Illinois
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Peterson |
| Given Name | Ernest |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 36 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Occupation | clerk |
| Industry | city hall |
| Class of Worker | GW |
| Hours Worked | 40 |
| Income (1939) | 1560 |
| Highest Grade | H-2 |
| 1935 Residence | Same Place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Clerk |
| Township / Ward | Chicago |
| Est. Birth Year | ~1904 |
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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Ernest | Age | Birth yr |
|---|---|---|---|---|
| Anna Peterson | Spouse | — | 34 | ~1906 |
| James Peterson | Son | — | 4 | ~1936 |
| James Hartnett | Other | — | 14 | ~1926 |
| Frances Peterson | Daughter | — | 7 | ~1933 |
| Ernest Peterson | Head | — | 36 | ~1904 |
| William Peterson | Son | — | 8 | ~1932 |
Census Appearances
1910
Cook, Illinois
Son, age 6
Cook, Illinois · implied b. ~1904 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Petterson |
| Given Name | Ernest F. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 6 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1920
Cook, Illinois
Son, age 16
Cook, Illinois · implied b. ~1904 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Peterson |
| Given Name | Ernest |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | Office Boy |
| Industry | Swift Co. |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Cook, Illinois
Other, age 26
Cook, Illinois · implied b. ~1904 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Peterson |
| Given Name | Ernest |
| Relationship to Head | Roomer |
| Sex | M |
| Color / Race | White |
| Age | 26 |
| Marital Status | Married |
| Birthplace | Illinois |
| Age at First Marriage | 25 |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | Truck Driver |
| Industry | Teaming Co. |
| Class of Worker | W |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Head, age 36
Cook-County, Illinois · implied b. ~1904 — 6 household members
| Surname | Peterson |
| Given Name | Ernest |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 36 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Occupation | clerk |
| Industry | city hall |
| Class of Worker | GW |
| Hours Worked | 40 |
| Income (1939) | 1560 |
| Highest Grade | H-2 |
| 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 Ernest Peterson across 4 US Census years (1910, 1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father John Petterson (~0.92 confidence) and mother Mathilda Peterson (~0.92 confidence) and mother Matilda Petterson (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
John Petterson
b. ~1868
Source father
● Household
· direct · ~0.92
Mother
Mathilda Peterson
b. ~1878
Source mother
● Household
· direct · ~0.92
Mother
Matilda Petterson
b. ~1869
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Ernest Peterson
Head · 1940 · age 36 · b. ~1904 · 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-t0627-00944-00807)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Helen Zurek | 25 | Sister | Stenographer | Illinois |
| 42 | Frieda Gouenhely|Gouenherly | 40 | Head | Janitress | Illinois |
| 43 | Elmer Gouenhely|Gouenherly | 21 | Son | Buffer | Illinois |
| 44 | Mildred Gouenhely|Gouenherly | 18 | Daughter | New Worker | Illinois |
| 45 | Doris Gouenhely|Gouenherly | 14 | Daughter | — | Illinois |
| 46 | Carl Lubrizzi | 47 | Head | Laborer | Italy |
| 47 | Mary Lubrizzi | 43 | Wife | — | Indiana |
| 48 | Patrick Leen | 66 | Head | — | Ireland (Eire) |
| 49 | Michael Leen | 30 | Son | Clerk | Illinois |
| 50 | Edward Leen | 34 | Son | Clerk | Illinois |
| 51 | Helen Martucci | 27 | Daughter | Bindery | Illinois |
| 52 | Thomas Simond | 42 | Head | Patrolman | Illinois |
| 53 | Marie Simond | 38 | Wife | — | Illinois |
| 54 | Martin Simond | 12 | Son | — | Illinois |
| 55 | Margaret Simond | 11 | Daughter | — | Illinois |
| 56 | Joan Simond | 4 | Daughter | — | Illinois |
| 57 | Patrick Geary | 70 | Head | — | Ireland (Eire) |
| 58 | James Geary | 34 | Son | Patrolman | Illinois |
| 59 | Charlotte Geary | 32 | Daughter-in-law | — | Illinois |
| 60 | James Jr. Geary | 4 | Grandson | — | Illinois |
| 61 | Edward Eckel | 44 | Head | Police Officer | Illinois |
| 62 | Mary Eckel | 44 | Wife | — | Illinois |
| 63 | Charles Eckel | 20 | Son | Shipping Clerk | Illinois |
| 64 | June Eckel | 13 | Daughter | — | Illinois |
| 65 | Edward Eckel | 3 | Son | — | Illinois |
| 66 | Maurice Begley | 63 | Head | Electrician | Illinois |
| 67 | Mae Begley | 60 | Sister | — | Illinois |
| 68 | Ernest Peterson THIS PERSON | 36 | Head | Clerk | Illinois |
| 69 | Anna Peterson | 34 | Wife | — | Illinois |
| 70 | William Peterson | 8 | Son | — | Illinois |
| 71 | Frances Peterson | 7 | Daughter | — | Illinois |
| 72 | James Peterson | 4 | Son | — | Illinois |
| 73 | James Hartnett | 14 | Boarder | — | Illinois |
| 74 | Charles Thompson | 64 | Head | Hog-Buyer | Illinois |
| 75 | Mary Thompson | 59 | Wife | — | England |
| 76 | James Thompson | 22 | Son | Hog-Driver | Illinois |
| 77 | Ethel Costello | 34 | Daughter | Waitress | Illinois |
| 78 | Rosemary Costello | 5 | Daughter | — | Illinois |
| 79 | Thomas J. Hyland | 28 | Head | Coffee Roaster | Illinois |
| 80 | Rose Hyland | 25 | Wife | — | Illinois |
Pedigree Summary
Ernest
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)