LJ
Leonard Johnson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Leonard Johnson across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed), with identified parents Charles & Hildur — first a son (b.~1914), then head of a 4-person household.
Age 26
b. ~1914
Male
Son
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Johnson |
| Given Name | Leonard |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 26 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Occupation | Supervisor |
| Industry | Motor Plant |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1560 |
| Highest Grade | No 8 |
| 1935 Residence | Same Place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Supervisor |
| Township / Ward | Chicago City |
| Est. Birth Year | ~1914 |
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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Leonard | Age | Birth yr |
|---|---|---|---|---|
| Claire Johnson | Daughter | — | 16 | ~1924 |
| Charles Johnson | Head | — | 59 | ~1881 |
| Leonard Johnson | Son | — | 26 | ~1914 |
| Hildur Johnson | Spouse | — | 55 | ~1885 |
Census Appearances
1920
Cook, Illinois
Son, age 4
Cook, Illinois · implied b. ~1916 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Leonard |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Holland |
| Occupation | none |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Cook, Illinois
Son, age 15
Cook, Illinois · implied b. ~1915 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Leonard |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Holland |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Son, age 26
Cook-County, Illinois · implied b. ~1914 — 4 household members
| Surname | Johnson |
| Given Name | Leonard |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 26 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Occupation | Supervisor |
| Industry | Motor Plant |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1560 |
| Highest Grade | No 8 |
| 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 Leonard Johnson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Charles Johnson (~0.92 confidence) and mother Hildur Johnson (~0.92 confidence) and father A Johnson (~0.92 confidence) and father Albert Johnson (~0.92 confidence) and mother Jeanette Johnson (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Charles Johnson
b. ~1881
Source father
● Household
· direct · ~0.92
Mother
Hildur Johnson
b. ~1885
Source mother
● Household
· direct · ~0.92
Father
A Johnson
b. ~1890
Source father
● Household
· direct · ~0.92
Father
Albert Johnson
b. ~1890
Source father
● Household
· direct · ~0.92
Mother
Jeanette Johnson
b. ~1895
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Leonard Johnson
Son · 1940 · age 26 · b. ~1914 · Illinois
★ You are viewing this record
Sibling
Claire Johnson
Sibling · 1940 · age 16
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-t0627-00939-00646)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Clare Narr | 21 | Daughter | Clerk | Illinois |
| 42 | Gordon Narr | 20 | Son | Draftsman | Illinois |
| 43 | Mabel F. Johnson | 50 | Head | Medical Doctor | Illinois |
| 44 | Susan M. Johnson | 21 | Daughter | — | Illinois |
| 45 | Robert Johnson | 18 | Son | — | Illinois |
| 46 | Frank Carlson | 73 | Father | — | Sweden |
| 47 | Charles F. Johnson | 59 | Head | Watchman | Sweden |
| 48 | Hildur A. Johnson | 55 | Wife | — | Sweden |
| 49 | Leonard Johnson THIS PERSON | 26 | Son | Supervisor | Illinois |
| 50 | Claire Johnson | 16 | Daughter | — | Illinois |
| 51 | Carl Peterson | 50 | Head | Dentist | Illinois |
| 52 | Dorothy Peterson | 17 | Daughter | — | Illinois |
| 53 | Clarence G. Anderson | 35 | Head | Office Clerk | Illinois |
| 54 | Bernice V. Anderson | 34 | Wife | — | Illinois |
| 55 | Stewart Anderson | 7 | Son | — | Illinois |
| 56 | Alexander Messal | 74 | Head | Painter | Germany |
| 57 | Augusta Messal | 65 | Wife | — | Germany |
| 58 | Adolph Messal | 44 | Son | Electrician | Russia |
| 59 | Albert Messal | 36 | Son | Laborer | Illinois |
| 60 | Fred Messal | 35 | Son | Electrician | Illinois |
| 61 | Lena Messal | 31 | Daughter | Stenographer | Michigan |
| 62 | John L. Carter | 50 | Head | Principal | Illinois |
| 63 | Harriet Carter | 50 | Wife | — | Missouri |
| 64 | John Jr. Carter | 11 | Son | — | Illinois |
| 65 | Samuel Q. Benson | 56 | Head | Blacksmith | Sweden |
| 66 | Edna Benson | 55 | Wife | — | Sweden |
| 67 | Helge Benson | 27 | Son | Truck Driver | Illinois |
| 68 | Carl Benson | 25 | Son | Janitor | Illinois |
| 69 | Stella Zakaro | 50 | Head | — | Lithuania |
| 70 | John Zakaro | 24 | Son | Machine Operator | Illinois |
| 71 | Anna Zakaro | 22 | Daughter | Salesgirl | Illinois |
| 72 | John Jagneisus | 52 | Brother | Janitor | Lithuania |
| 73 | Joseph Markus | 60 | Lodger | Loader | Lithuania |
| 74 | Vincent Markus | 25 | Lodger | Electrician | Illinois |
| 75 | John Van Camshorse | 65 | Head | Hand Wood Worker | Netherlands |
| 76 | Mary Van Camshorse | 51 | Wife | — | Indiana |
| 77 | Esther Van Camshorse | 20 | Daughter | Teacher | Illinois |
| 78 | Ruth Van Camshorse | 16 | Daughter | — | Illinois |
| 79 | Martin Thoren | 40 | Head | Salesman | Illinois |
| 80 | Anna Thoren | 31 | Wife | Beauty Operator | Illinois |
Pedigree Summary
Leonard + 1 sibling
Gen 1 · 5 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)