EP
Elizabeth Peterson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Elizabeth Peterson across the 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a daughter (b.~1928), then head of a 8-person household.
Age 12
b. ~1928
Female
Daughter
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Peterson |
| Given Name | Elizabeth |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Highest Grade | 7 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Chicago City |
| Est. Birth Year | ~1928 |
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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Elizabeth | Age | Birth yr |
|---|---|---|---|---|
| Frances Summers | Other | — | 55 | ~1885 |
| Lillian Peterson | Daughter | — | 4 | ~1936 |
| Catherine Peterson | Daughter | — | 7 | ~1933 |
| John Peterson | Son | — | 16 | ~1924 |
| Mary Peterson | Spouse | — | 49 | ~1891 |
| John Peterson | Head | — | 57 | ~1883 |
| Elizabeth Peterson | Daughter | — | 12 | ~1928 |
| Isabella Peterson | Daughter | — | 14 | ~1926 |
Census Appearances
1930
Cook, Illinois
Daughter, age 1
Cook, Illinois · implied b. ~1929 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Peterson |
| Given Name | Elizabeth A |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | England |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Daughter, age 12
Cook-County, Illinois · implied b. ~1928 — 8 household members
| Surname | Peterson |
| Given Name | Elizabeth |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Highest Grade | 7 |
| 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 Elizabeth Peterson across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Elizabeth Peterson
Daughter · 1940 · age 12 · b. ~1928 · Illinois
★ You are viewing this record
Sibling
Catherine Peterson
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Isabella Peterson
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Peterson
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lillian Peterson
Sibling · 1940 · age 4
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 — 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-t0627-00960-00077)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Robert Boehm | 20 | Son | Shipping Clerk | Illinois |
| 42 | Richard Boehm | 17 | Son | — | Illinois |
| 43 | Otto Davison | 49 | Head | Broker | Illinois |
| 44 | Mabelle Davison | 46 | Wife | Sales Lady | Michigan |
| 45 | Craig Davison | 23 | Son | Asst Auditor | Illinois |
| 46 | Mabelle Davison | 14 | Daughter | — | Illinois |
| 47 | Edward Davison | 11 | Son | — | Illinois |
| 48 | Aron Dam | 41 | Head | Office Manager | Iowa |
| 49 | Ann Dam | 37 | Wife | — | Iowa |
| 50 | Marilyn Dam | 9 | Daughter | — | Illinois |
| 51 | James Dam | 4 | Son | — | Illinois |
| 52 | Roberta Kuhn | 24 | Cousin | Typist | Iowa |
| 53 | Joseph Donnelly | 45 | Head | Police Officer | Irish Free State |
| 54 | Catherine Donnelly | 35 | Wife | — | Irish Free State |
| 55 | Michael Donnelly | 14 | Son | — | Illinois |
| 56 | John Donnelly | 11 | Son | — | Illinois |
| 57 | Thomas Donnelly | 10 | Son | — | Illinois |
| 58 | Mary Donnelly | 7 | Daughter | — | Illinois |
| 59 | Eugene Donnelly | 6 | Son | — | Illinois |
| 60 | John Peterson | 57 | Head | Steam Fitter | Irish Free State |
| 61 | Mary Peterson | 49 | Wife | — | Irish Free State |
| 62 | John Peterson | 16 | Son | — | Massachusetts |
| 63 | Isabella Peterson | 14 | Daughter | — | Massachusetts |
| 64 | Elizabeth Peterson THIS PERSON | 12 | Daughter | — | Illinois |
| 65 | Catherine Peterson | 7 | Daughter | — | Illinois |
| 66 | Lillian Peterson | 4 | Daughter | — | Illinois |
| 67 | Frances Summers | 55 | Cousin | Sewing Machine | Irish Free State |
| 68 | Eugene Hagen | 34 | Head | Office Manager | Michigan |
| 69 | Mable Hagen | 29 | Wife | — | Missouri |
| 70 | Marilyn Hagen | 4 | Daughter | — | Minnesota |
| 71 | William Moerke | 41 | Head | Electrical Engineer | Illinois |
| 72 | Ida Moerke | 35 | Wife | — | Illinois |
| 73 | Irene Moerke | 11 | Daughter | — | Illinois |
| 74 | William Moerke | 9 | Son | — | Illinois |
| 75 | Emilia Rodriguez | 69 | Head | — | Austria |
| 76 | Andrew Rodriguez | 36 | Son | Typist | Illinois |
| 77 | Arthur J. Morris | 29 | Head | Inspector | Canada |
| 78 | Evelyn Morris | 24 | Wife | — | Missouri |
| 79 | Robert C. Morris | 2 | Son | — | Illinois |
| 80 | Arthur Patzhoff | 40 | Head | Office Mgr | Illinois |
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)