EP
Elizabeth Peterson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Lake-County, Illinois
Our Model Tree links this Elizabeth Peterson across the 1920, 1930 and 1940 US Censuses in Lake-County, Illinois (XGBoost, ~Confirmed), with identified parents Alexander & Elvira — first a daughter (b.~1911), then head of a 2-person household.
Age 29
b. ~1911
Female
Daughter
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Lake-County, Illinois |
| Surname | Peterson |
| Given Name | Elizabeth |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 29 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Waukegan City |
| 1935 Residence (County) | Lake |
| Additional Details | |
| Occupation | Stenographer |
| Industry | Insurance |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1300 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Stenographer |
| Township / Ward | Waukegan City |
| Est. Birth Year | ~1911 |
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.
2 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Elizabeth | Age | Birth yr |
|---|---|---|---|---|
| Elvira Peterson | Head | — | 66 | ~1874 |
| Elizabeth Peterson | Daughter | — | 29 | ~1911 |
Census Appearances
1920
Lake, Illinois
Daughter, age 9
Lake, Illinois · implied b. ~1911 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Peterson |
| Given Name | Elizabeth |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 9 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Finland |
| Mother's Birthplace | Sweden |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Swedish |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Lake, Illinois
Daughter, age 19
Lake, Illinois · implied b. ~1911 — 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 | 19 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Finland |
| Mother's Birthplace | Sweden |
| Occupation | Bookkeeper |
| Industry | Insurance |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Lake-County, Illinois
Daughter, age 29
Lake-County, Illinois · implied b. ~1911 — 2 household members
| Surname | Peterson |
| Given Name | Elizabeth |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 29 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Waukegan City |
| 1935 Residence (County) | Lake |
| Occupation | Stenographer |
| Industry | Insurance |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1300 |
| 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 Elizabeth Peterson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Alexander Peterson (~0.92 confidence) and mother Elvira Peterson (~0.92 confidence) and mother Elvira Peterson (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Alexander Peterson
b. ~1873
Source father
● Household
· direct · ~0.92
Mother
Elvira Peterson
b. ~1874
Source mother
● Household
· direct · ~0.92
Mother
Elvira Peterson
b. ~1874
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Elizabeth Peterson
Daughter · 1940 · age 29 · b. ~1911 · 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 — Lake-County, Illinois
Open full size
1940 US Federal Census — Lake-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00830-00554)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Daikotis, John Morkus | 65 | Lodger | Laborer | Lithuania |
| 2 | Susan Martinaitis | 44 | Head | — | Lithuania |
| 3 | Walter Martinaitis | 14 | Son | — | Illinois |
| 4 | Casimer Martinaitis | 13 | Son | — | Illinois |
| 5 | Delores Martinaitis | 10 | Daughter | — | Illinois |
| 6 | Eleanor Martinaitis | 9 | Daughter | — | Illinois |
| 7 | Albertina Martinaitis | 7 | Daughter | — | Illinois |
| 8 | Virginia Martinaitis | 4 | Daughter | — | Illinois |
| 9 | John Pietz | 61 | Cousin | — | Lithuania |
| 10 | Joseph Gilbert | 33 | Head | Reeler | Pennsylvania |
| 11 | Anna Gilbert | 31 | Wife | — | Pennsylvania |
| 12 | Joseph Jr. Gilbert | 10 | Son | — | Pennsylvania |
| 13 | Albert Gilbert | 8 | Son | — | Pennsylvania |
| 14 | Helen Warpus | 20 | Sister | Packer | Pennsylvania |
| 15 | Elvira Peterson | 66 | Head | — | Sweden |
| 16 | Elizabeth Peterson THIS PERSON | 29 | Daughter | Stenographer | Illinois |
| 17 | Frank Harju | 52 | Head | Galvanizer | Finland |
| 18 | Minnie Harju | 47 | Wife | — | Finland |
| 19 | Ina Harju | 24 | Daughter | Bookkeeper | Illinois |
| 20 | William Harju | 22 | Son | Packer | Illinois |
| 21 | Evelyn Harju | 19 | Daughter | Typist | Illinois |
| 22 | Harry Harju | 17 | Son | — | Illinois |
| 23 | Betty Jane Harju | 13 | Daughter | — | Illinois |
| 24 | Norma Harju | 6 | Daughter | — | Illinois |
| 25 | John O. Johnson | 63 | Head | Mechanic | Sweden |
| 26 | Hilma Johnson | 55 | Wife | — | Sweden |
| 27 | Edwin Johnson | 30 | Son | Inventory Clerk | Illinois |
| 28 | Iver Jr. Farman | 30 | Head | Tin Smith | Norway |
| 29 | Ellen Farman | 28 | Wife | — | Finland |
| 30 | Frederick Farman | 7 | Son | — | Illinois |
| 31 | Barbara Farman | 7 | Daughter | — | Illinois |
| 32 | Peter Blomstrom | 37 | Head | Cutter | Illinois |
| 33 | Mary Blomstrom | 35 | Wife | Machine Operator | Illinois |
| 34 | Richard Blomstrom | 13 | Son | — | Illinois |
| 35 | Roger Anderson | 51 | Head | Painter | Sweden |
| 36 | Ebba Anderson | 45 | Wife | Laundress | Sweden |
| 37 | Roger Jr. Anderson | 22 | Head | Laborer | Illinois |
| 38 | Rosemary Anderson | 19 | Wife | — | Illinois |
| 39 | Emil Hellstrom | 52 | Head | Stationary Engineer | Finland |
| 40 | Matilda Hellstrom | 49 | Wife | — | Finland |
Pedigree Summary
Elizabeth
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)