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 Andrew & Lottie — first a head (b.~1895), then head of a 3-person household.
Age 45
b. ~1895
Male
Head
Born: Illinois
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Johnson |
| Given Name | Leonard |
| Relationship to Head | head |
| Sex | M |
| Color / Race | White |
| Age | 45 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Occupation | clergyman |
| Class of Worker | OA |
| Hours Worked | 40 |
| Income (1939) | 1695 |
| Highest Grade | H-4 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Clergyman |
| Township / Ward | Chicago City |
| Est. Birth Year | ~1895 |
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 Leonard | Age | Birth yr |
|---|---|---|---|---|
| Lenora Johnson | Daughter | — | 10 | ~1930 |
| Leonard Johnson | Head | — | 45 | ~1895 |
| Pearl Johnson | Spouse | — | 42 | ~1898 |
Census Appearances
1920
Cook, Illinois
Son, age 25
Cook, Illinois · implied b. ~1895 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Leonard |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Norway |
| Mother's Birthplace | Illinois |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Cook, Illinois
Other, age 35
Cook, Illinois · implied b. ~1895 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Leonard |
| Relationship to Head | Brother-in-law |
| Sex | M |
| Color / Race | White |
| Age | 35 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Norway |
| Mother's Birthplace | Illinois |
| Occupation | Salesman |
| Industry | Real Estate |
| Class of Worker | W |
| Can Read/Write | Yes |
| Veteran | Yes WW |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Head, age 45
Cook-County, Illinois · implied b. ~1895 — 3 household members
| Surname | Johnson |
| Given Name | Leonard |
| Relationship to Head | head |
| Sex | M |
| Color / Race | White |
| Age | 45 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Occupation | clergyman |
| Class of Worker | OA |
| Hours Worked | 40 |
| Income (1939) | 1695 |
| Highest Grade | 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 Leonard Johnson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Andrew Johnson (~0.92 confidence) and mother Lottie Johnson (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Andrew Johnson
b. ~1858
Source father
● Household
· direct · ~0.92
Mother
Lottie Johnson
b. ~1858
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Leonard Johnson
Head · 1940 · age 45 · b. ~1895 · 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-t0627-00990-00024)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Fred Ohm | 44 | head | Feeder | Illinois |
| 2 | Viola Ohm | 34 | wife | Maid | New York |
| 3 | Beverly Ohm | 14 | daughter | — | Illinois |
| 4 | Gene Ohm | 12 | daughter | — | Illinois |
| 5 | Robert Ohm | 9 | son | — | Illinois |
| 6 | Peter Andreasen | 65 | head | Janitor | Illinois |
| 7 | Marie Andreasen | 59 | wife | — | Illinois |
| 8 | Mabel Olsen | 31 | daughter | Elevator Operator | Nebraska |
| 9 | Warren Olsen | 8 | grandson | — | Illinois |
| 10 | Julius Andreasen | 52 | brother | File Clerk | Illinois |
| 11 | Bernard Mulheim | 49 | head | — | Illinois |
| 12 | Nellie Mulheim | 47 | wife | Cutter | Illinois |
| 13 | Kevin Mulheim | 16 | son | — | Illinois |
| 14 | Regina Mulheim | 14 | daughter | — | Illinois |
| 15 | Mary Mulheim | 13 | daughter | — | Illinois |
| 16 | Louis Ohm | 67 | head | — | Illinois |
| 17 | Edna Ohm | 40 | daughter | Stenographer | Illinois |
| 18 | Annette Ohm | 37 | daughter | — | Illinois |
| 19 | Mildred Ohm | 29 | daughter | Waitress | Illinois |
| 20 | August Pergande | 57 | head | Production Clerk | Illinois |
| 21 | Carrie Pergande | 51 | wife | — | Illinois |
| 22 | Mildred Pergande | 24 | daughter | Bookkeeping | Minnesota |
| 23 | Leonard Johnson THIS PERSON | 45 | head | Clergyman | Illinois |
| 24 | Pearl Johnson | 42 | wife | — | Illinois |
| 25 | Lenora Johnson | 10 | daughter | — | Illinois |
| 26 | Tom Arthur Bue | 51 | head | Foreman | Norway |
| 27 | Karin Bue | 45 | wife | — | Norway |
| 28 | Agnes Bue | 9 | daughter | — | Norway |
| 29 | Melvin Peterson | 45 | lodger | Salesman | Illinois |
| 30 | Andrew Johnson | 80 | head | — | Illinois |
| 31 | Alice Johnson | 38 | daughter | Secretary | Illinois |
| 32 | Mildred Johnson | 34 | daughter | Elementary Teacher | Illinois |
| 33 | James Christiansen | 44 | head | Salesman | Wisconsin |
| 34 | Margaret Christiansen | 41 | wife | — | Illinois |
| 35 | James Christiansen | 15 | son | Helper | Illinois |
| 36 | Lois Christiansen | 14 | daughter | — | Illinois |
| 37 | Carol Christiansen | 9 | daughter | — | Illinois |
| 38 | Niels Pedersen | 41 | head | Truck Driver | Denmark |
| 39 | Ethel Pedersen | 48 | wife | — | Wisconsin |
| 40 | Carolyn Pedersen | 15 | daughter | Counter Operator | Wisconsin |
Pedigree Summary
Leonard
Gen 1 · 2 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)