JC
John Cronin — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this John Cronin across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a head (b.~1871), then head of a 5-person household.
Age 69
b. ~1871
Male
Head
Born: Wisconsin
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Cronin |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 69 |
| Marital Status | Married |
| Birthplace | Wisconsin |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Occupation | Watchman |
| Industry | Steel Service |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 1500 |
| Highest Grade | No 8 |
| 1935 Residence | Same Place |
| Birth State | Wisconsin |
| Birth Country | United States |
| Birthplace (normalized) | wisconsin |
| Occupation | Watchman |
| Township / Ward | Chicago City |
| Est. Birth Year | ~1871 |
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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Agnes Cronin | Daughter | — | 30 | ~1910 |
| Emma Cronin | Spouse | — | 67 | ~1873 |
| John Cronin | Head | — | 69 | ~1871 |
| Ellen Cronin | Daughter | — | 22 | ~1918 |
| Edward Cronin | Son | — | 25 | ~1915 |
Census Appearances
1920
Cook, Illinois
Head, age 48
Cook, Illinois · implied b. ~1872 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cronin |
| Given Name | John R. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 48 |
| Marital Status | Married |
| Birthplace | Wisconsin |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Wisconsin |
| Occupation | Motorman |
| Industry | Street car |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Birth State | Wisconsin |
| Birth Country | United States |
| Year of Naturalization | R |
| Birthplace (normalized) | wisconsin |
1930
Cook, Illinois
Head, age 58
Cook, Illinois · implied b. ~1872 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cronin |
| Given Name | John F. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 58 |
| Marital Status | Married |
| Birthplace | Wisconsin |
| Age at First Marriage | 21 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | New Jersey |
| Occupation | Motorman |
| Industry | Street cars |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 40 |
| Radio Set | R |
| Birth State | Wisconsin |
| Birth Country | United States |
| Birthplace (normalized) | wisconsin |
1940
Cook-County, Illinois
Head, age 69
Cook-County, Illinois · implied b. ~1871 — 5 household members
| Surname | Cronin |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 69 |
| Marital Status | Married |
| Birthplace | Wisconsin |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Occupation | Watchman |
| Industry | Steel Service |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 1500 |
| Highest Grade | No 8 |
| 1935 Residence | Same Place |
| Birth State | Wisconsin |
| Birth Country | United States |
| Birthplace (normalized) | wisconsin |
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 Cronin across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
John Cronin
Head · 1940 · age 69 · b. ~1871 · 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-t0627-00952-00710)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Catherine O'Connor | 52 | Head | — | Illinois |
| 2 | Phyllis O'Connor | 27 | Daughter | Office Clerk | Illinois |
| 3 | Margaret O'Connor | 21 | Daughter | — | Illinois |
| 4 | George Stegmaier | 36 | Head | Mechanical Advisor | Illinois |
| 5 | Bertha Stegmaier | 36 | Wife | Clerk | Illinois |
| 6 | Eileen O'Connor | 56 | Mother-in-law | — | Illinois |
| 7 | Eleanor O'Connor | 31 | Sister-in-law | Stenographer | Illinois |
| 8 | Laura Ruchhoft | 49 | Head | Watchman | Illinois |
| 9 | Ernestine Ruchhoft | 45 | Wife | — | Illinois |
| 10 | Henry Ruchhoft | 20 | Son | Truck Driver | Illinois |
| 11 | Leona Ruchhoft | 17 | Daughter | — | Illinois |
| 12 | Louis Ruchhoft | 10 | Son | — | Illinois |
| 13 | Robert Tibbitt | 27 | Head | Shipping Clerk | Michigan |
| 14 | Helen Tibbitt | 27 | Wife | Telephone Operator | Illinois |
| 15 | John Cronin THIS PERSON | 69 | Head | Watchman | Wisconsin |
| 16 | Emma Cronin | 67 | Wife | — | Wisconsin |
| 17 | Ellen Cronin | 22 | Daughter | — | Illinois |
| 18 | Agnes Cronin | 30 | Daughter | — | Illinois |
| 19 | Edward Cronin | 25 | Son | Salesman | Illinois |
| 20 | Richard O'Rourke | 35 | Head | Shipping Dept | Illinois |
| 21 | Margaret O'Rourke | 32 | Wife | — | Illinois |
| 22 | Isabelle O'Rourke | 7 | Daughter | — | Illinois |
| 23 | Richard O'Rourke | 5 | Son | — | Illinois |
| 24 | Isabel Mcavoy | 50 | Mother-in-law | — | Illinois |
| 25 | Solomon Miller | 64 | Head | — | Russia |
| 26 | Anna Miller | 54 | Wife | — | Romania |
| 27 | Irving Bernstein | 26 | Step-son | Owner-Manager | Romania |
| 28 | Bertha Bernstein | 23 | Step-daughter | Filer | Canada |
| 29 | Charles Gutridge | 45 | Head | Switchman | Ohio |
| 30 | Eva Gutridge | 45 | Wife | — | Ohio |
| 31 | William Gutridge | 23 | Son | — | Illinois |
| 32 | Barbara Gutridge | 4 | Daughter | — | Illinois |
| 33 | Joan Gutridge | 1 | Daughter | — | Ohio |
| 34 | Alexander Dzihan | 31 | Head | Metallurgist | Conn |
| 35 | Vernocia Dzihan | 32 | Wife | — | Illinois |
| 36 | William Mccall | 44 | Head | Switchman | Minn |
| 37 | Mary Mccall | 45 | Wife | — | Michigan |
| 38 | David Mccall | 18 | Son | — | Illinois |
| 39 | Eugene Alexander | 17 | Boarder | — | Illinois |
| 40 | Lawrence Hunde | 41 | Head | Bookkeeper | Illinois |
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)