JK
John King — 1940 US Census Record
Model Tree available1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this John King across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed), with identified parents William & Arthur — first a son (b.~1908), then head of a 14-person household.
Age 32
b. ~1908
Male
Son
Born: Illinois
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | King |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 32 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | CHICAGO |
| 1935 Residence (County) | COOK |
| Additional Details | |
| Occupation | Conductor |
| Industry | Surface Lines |
| Class of Worker | PW |
| Income (1939) | 0 |
| Highest Grade | H-4 |
| 1935 Residence | Same house |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Conductor |
| Township / Ward | Chicago |
| Est. Birth Year | ~1908 |
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.
14 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Loretta King | Daughter | — | 30 | ~1910 |
| Catherine Tonne | Daughter | — | 29 | ~1911 |
| Bridget King | Head | — | 53 | ~1887 |
| Kathlene Tonne | Other | — | 4 | ~1936 |
| Dona Tonne | Other | — | 7 | ~1933 |
| William Tonne | Other | — | 9 | ~1931 |
| Elaine Tonne | Other | — | 3 | ~1937 |
| Theodore Tonne | Other | — | 30 | ~1910 |
| Mary Tonne | Other | — | ~1940 | |
| Loretta King | Other | — | 10 | ~1930 |
| Annet Tonne | Other | — | 2 | ~1938 |
| Eugene King | Son | — | 19 | ~1921 |
| James King | Son | — | 15 | ~1925 |
| John King | Son | — | 32 | ~1908 |
Census Appearances
1920
Cook, Illinois
Son, age 11
Cook, Illinois · implied b. ~1909 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | King |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Cook, Illinois
Son, age 21
Cook, Illinois · implied b. ~1909 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | King |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Son, age 32
Cook-County, Illinois · implied b. ~1908 — 14 household members
| Surname | King |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 32 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | CHICAGO |
| 1935 Residence (County) | COOK |
| Occupation | Conductor |
| Industry | Surface Lines |
| Class of Worker | PW |
| Income (1939) | 0 |
| Highest Grade | H-4 |
| 1935 Residence | Same house |
| 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 John King across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father William King (~0.92 confidence) and father Arthur King (~0.92 confidence) and mother Bridget King (~0.92 confidence) and mother Bertha King (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
William King
b. ~1882
Source father
● Household
· direct · ~0.92
Father
Arthur King
b. ~1885
Source father
● Household
· direct · ~0.92
Mother
Bridget King
b. ~1887
Source mother
● Household
· direct · ~0.92
Mother
Bertha King
b. ~1884
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John King
Son · 1940 · age 32 · b. ~1908 · Illinois
★ You are viewing this record
Sibling
James King
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Loretta King
Sibling · 1940 · age 30
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Eugene King
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Catherine Tonne
Sibling · 1940 · age 29
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-t0627-00969-00345)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Lillian Quille | 27 | Daughter | Stenographer | Illinois |
| 2 | Katherine Galivan | 33 | Cousin | Supervisor | Irish Free State |
| 3 | Mary Sexton | 56 | Lodger | — | Illinois |
| 4 | Percy Borer | 62 | Head | Electrician | England |
| 5 | Annie Borer | 61 | Wife | — | England |
| 6 | John Mcgrath | 46 | Son-in-law | House Detective | Pennsylvania |
| 7 | Ethel Mcgrath | 32 | Daughter | — | Illinois |
| 8 | Bridget King | 53 | Head | — | Irish Free State |
| 9 | Eugene King | 19 | Son | Stock Clerk | Illinois |
| 10 | James King | 15 | Son | — | Illinois |
| 11 | John King THIS PERSON | 32 | Son | Conductor | Illinois |
| 12 | Loretta King | 30 | Daughter | Telephone Operator | Illinois |
| 13 | Loretta M King | 10 | Grand-daughter | — | Illinois |
| 14 | Theodore Tonne | 30 | Son-in-law | Clerk-Order | Wisconsin |
| 15 | Catherine Tonne | 29 | Daughter | — | Illinois |
| 16 | William T Tonne | 9 | Grand-son | — | Illinois |
| 17 | Dona Mae Tonne | 7 | Grand-daughter | — | Illinois |
| 18 | Kathlene Tonne | 4 | Grand-daughter | — | Illinois |
| 19 | Elaine Tonne | 3 | Grand-daughter | — | Illinois |
| 20 | Annet Tonne | 2 | Grand-daughter | — | Illinois |
| 21 | Mary C Tonne | 0 | Grand-daughter | — | Illinois |
| 22 | Emmett Gleeson | 28 | Head | Mail Carrier | Illinois |
| 23 | Josephine Gleeson | 29 | Wife | — | Illinois |
| 24 | Edward Gleeson | 12 | Son | — | Illinois |
| 25 | Johanna O'Connor | 75 | Mother-in-law | — | Irish Free State |
| 26 | John J Shanahan | 59 | Head | Post Office Clerk | Illinois |
| 27 | Lylah Shanahan | 50 | Wife | — | Wisconsin |
| 28 | John F Shanahan | 25 | Son | General Office | Illinois |
| 29 | — | None | — | — | — |
| 30 | Robert Firman | 58 | Head | Chauffeur | Italy |
| 31 | Emma Firman | 56 | Wife | — | Illinois |
| 32 | Charles Firman | 29 | Son | Mixer-Filler | Illinois |
| 33 | Gildo Chinel | 26 | Son-in-law | Shipping Clerk | Kansas |
| 34 | Marie Chinel | 24 | Daughter | Mangler | Illinois |
| 35 | Joseph Firman | 36 | Head | Truck Driver | Illinois |
| 36 | Sylvia Firman | 34 | Wife | — | Illinois |
| 37 | Robert Firman | 12 | Son | — | Illinois |
| 38 | Dolores Firman | 10 | Daughter | — | Illinois |
| 39 | Elizabeth Firman | 6 | Daughter | — | Illinois |
| 40 | Susan White | 60 | Head | Wash Lady | Illinois |
Pedigree Summary
John + 4 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)