RJ
Ruby Johnson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Ruby Johnson across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed), with identified parents Kirsten & Severder — first a daughter (b.~1916), then head of a 6-person household.
Age 24
b. ~1916
Female
Daughter
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Johnson |
| Given Name | Ruby |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Occupation | Cutter |
| Industry | Wholesale Office Supply |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 625 |
| Highest Grade | H 2 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Cutter |
| Township / Ward | Chicago City |
| Est. Birth Year | ~1916 |
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 Ruby | Age | Birth yr |
|---|---|---|---|---|
| Ruby Johnson | Daughter | — | 24 | ~1916 |
| Stella Johnson | Daughter | — | 27 | ~1913 |
| Harriet St Ledger | Daughter | — | 36 | ~1904 |
| Kirsten Johnson | Head | — | 64 | ~1876 |
| Roy St Ledger | Other | — | 7 | ~1933 |
| Robert St Ledger | Other | — | 5 | ~1935 |
Census Appearances
1920
Cook, Illinois
Daughter, age 3
Cook, Illinois · implied b. ~1917 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Ruby |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Cook, Illinois
Daughter, age 14
Cook, Illinois · implied b. ~1916 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Ruby |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Daughter, age 24
Cook-County, Illinois · implied b. ~1916 — 6 household members
| Surname | Johnson |
| Given Name | Ruby |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Occupation | Cutter |
| Industry | Wholesale Office Supply |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 625 |
| 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 Ruby Johnson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Kirsten Johnson (~0.92 confidence) and father Severder Johnson (~0.92 confidence) and father Alexander Johnson (~0.92 confidence) and mother Selma Johnson (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Kirsten Johnson
b. ~1876
Source mother
● Household
· direct · ~0.92
Father
Severder Johnson
b. ~1883
Source father
● Household
· direct · ~0.92
Father
Alexander Johnson
b. ~1884
Source father
● Household
· direct · ~0.92
Mother
Selma Johnson
b. ~1884
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Ruby Johnson
Daughter · 1940 · age 24 · b. ~1916 · Illinois
★ You are viewing this record
Sibling
Harriet St Ledger
Sibling · 1940 · age 36
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Stella Johnson
Sibling · 1940 · age 27
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
38 people indexed on this census page (nara:1940:m-t0627-00990-00004)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Mary Burkhartsmeier | 80 | Head | — | Illinois |
| 2 | Frank Schwartz | 76 | Brother-in-law | — | Michigan |
| 3 | Mable Witzen | 21 | Lodger | Stenographer | Ohio |
| 4 | Elizabeth Wilhelm | 50 | Lodger | Housekeeper | Jugo Slavia |
| 5 | Francesa Szymanski | 64 | Head | — | Poland |
| 6 | Lillian Kooi | 39 | Daughter | File-Clerk | Illinois |
| 7 | Harold Kooi | 42 | Son-in-law | Handyman | Michigan |
| 8 | Edward Kooi | 8 | Grand-son | — | Illinois |
| 9 | Ludvig Andersen | 47 | Head | Linotype Printer | Denmark |
| 10 | Gerda Andersen | 40 | Wife | — | Denmark |
| 11 | Alexander Andersen | 21 | Son | Pressman | Illinois |
| 12 | Karen E Andersen | 19 | Daughter | Typist | Illinois |
| 13 | Sophia Hansen | 42 | Head | Hemstitcher | Illinois |
| 14 | William Hansen | 38 | Brother | Engraver | Illinois |
| 16 | Amanda Sinamaker | 71 | Head | — | Germany |
| 17 | Edward Rody | 34 | Head | Repair Tools | Illinois |
| 18 | Edna Rody | 34 | Wife | Auditor | Illinois |
| 19 | Virginia Ericksen | 34 | Head | Sales Lady | Illinois |
| 20 | Laverne Lasky | 15 | Daughter | — | Illinois |
| 22 | Kirsten Johnson | 64 | Head | — | Norway |
| 23 | Stella Johnson | 27 | Daughter | Inspector | Illinois |
| 24 | Ruby Johnson THIS PERSON | 24 | Daughter | Cutter | Illinois |
| 25 | Harriet St Ledger | 36 | Daughter | Auditor | Wisconsin |
| 26 | Roy St Ledger | 7 | Grand-son | — | Illinois |
| 27 | Robert St Ledger | 5 | Grand-son | — | Illinois |
| 28 | John Schwiger | 53 | Head | Milk-Driver | Illinois |
| 29 | Margaret Schwiger | 51 | Wife | — | Illinois |
| 30 | William Schwiger | 22 | Son | Grocery Clerk | Illinois |
| 31 | Harriet Schwiger | 19 | Daughter | Tabealer | Illinois |
| 32 | John Schwiger | 15 | Son | — | Illinois |
| 33 | Gustav Newberg | 54 | Head | Maintenance Man | Denmark |
| 34 | Anna Newberg | 56 | Wife | — | Denmark |
| 35 | Anna Ceberly | 72 | Lodger | — | Denmark |
| 36 | Charles Seaman | 45 | Head | Truck Driver | Illinois |
| 37 | Florence H Seaman | 42 | Wife | Handsewing | Illinois |
| 38 | Ethel Mae Seaman | 18 | Daughter | File-Clerk | Illinois |
| 39 | Charles J Seaman | 13 | Son | — | Illinois |
| 40 | John Mayerhofer | 33 | Head | Beef Cutter | Austria |
Related Census Records
Pedigree Summary
Ruby + 2 siblings
Gen 1 · 4 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)