JC
John Connor — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this John Connor across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a head (b.~1870), then head of a 5-person household.
Age 70
b. ~1870
Male
Head
Born: Ireland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Connor |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 70 |
| Marital Status | Married |
| Birthplace | Ireland |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Naturalization Status | Naturalized |
| Additional Details | |
| Occupation | Repairman |
| Industry | Bldg & Chgo Surface Lines |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 334 |
| Highest Grade | No 8 |
| 1935 Residence | Same house |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
| Occupation | Repairman |
| Township / Ward | Chicago |
| Est. Birth Year | ~1870 |
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 |
|---|---|---|---|---|
| Virginia Connor | Daughter | — | 24 | ~1916 |
| John Connor | Head | — | 70 | ~1870 |
| Alice Gaffney | Other | — | 43 | ~1897 |
| Robert Connor | Son | — | 30 | ~1910 |
| Mary Connor | Spouse | — | 65 | ~1875 |
Census Appearances
1920
Cook, Illinois
Head, age 49
Cook, Illinois · implied b. ~1871 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Connor |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 49 |
| Marital Status | Married |
| Birthplace | Ireland |
| Year of Immigration | 1894 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Teamster |
| Industry | Wagons |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Home Owned/Rented | R |
| Birth Country | Ireland |
| Year of Naturalization | 1899 |
| Birthplace (normalized) | ireland |
1930
Cook, Illinois
Head, age 59
Cook, Illinois · implied b. ~1871 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Connor |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 59 |
| Marital Status | Married |
| Birthplace | Ireland |
| Naturalization Status | Naturalized |
| Year of Immigration | 1890 |
| Age at First Marriage | 26 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Scotland |
| Occupation | Repair Man |
| Industry | Surface RR |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Home Owned/Rented | O |
| Home Value / Rent | 4200 |
| Radio Set | R |
| Veteran | No |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1940
Cook-County, Illinois
Head, age 70
Cook-County, Illinois · implied b. ~1870 — 5 household members
| Surname | Connor |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 70 |
| Marital Status | Married |
| Birthplace | Ireland |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Naturalization Status | Naturalized |
| Occupation | Repairman |
| Industry | Bldg & Chgo Surface Lines |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 334 |
| Highest Grade | No 8 |
| 1935 Residence | Same house |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
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 Connor 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 Connor
Head · 1940 · age 70 · b. ~1870 · Illinois
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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-t0627-00955-00943)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Mary Horbach | 35 | Daughter | Saleswoman | Illinois |
| 2 | William Horbach | 32 | Son | Bartender | Illinois |
| 3 | Sylvester Horbach | 32 | Head | Inspector | Illinois |
| 4 | Matilda Horbach | 27 | Wife | Waitress | Illinois |
| 5 | Matilda Horbach | 9 | Daughter | — | Illinois |
| 6 | Cecelia Horbach | 8 | Daughter | — | Illinois |
| 7 | Sylvester Jr. Horbach | 0 | Son | — | Illinois |
| 8 | Robert H. Paxton | 51 | Head | Inspector | Illinois |
| 9 | Emily E. Paxton | 51 | Wife | — | Illinois |
| 10 | Maud Hilfong | 64 | Head | — | Illinois |
| 11 | Wilbert Walter Hilfong | 50 | Brother | — | Illinois |
| 12 | Ezra Thorogood | 82 | Head | — | New York |
| 13 | Kate Thorogood | 79 | Wife | — | England |
| 14 | Francisco Sanchez | 31 | Head | Finisher | Dominican Republic |
| 15 | Lucille Sanchez | 27 | Sister | Making False Teeth | Dominican Republic |
| 16 | Hilda Sanchez | 25 | Sister | Making False Teeth | Dominican Republic |
| 17 | John Connor THIS PERSON | 70 | Head | Repairman | Ireland |
| 18 | Mary Connor | 65 | Wife | — | Pennsylvania |
| 19 | Robert E. Connor | 30 | Son | Mailer | Illinois |
| 20 | Virginia Connor | 24 | Daughter | Record Clerk | Illinois |
| 21 | Alice Gaffney | 43 | Cousin | Manager | Pennsylvania |
| 22 | Raymond Rozenda | 28 | Head | Accountant | Illinois |
| 23 | Eileen Rozenda | 24 | Wife | — | Illinois |
| 24 | Sandra Rozenda | 1 | Daughter | — | Illinois |
| 25 | William Smith | 55 | Head | Bridge Tender | Ohio |
| 26 | Theresa Smith | 50 | Wife | — | Michigan |
| 27 | Joseph Kaschins | 60 | Head | Paint Grinder | Illinois |
| 28 | Emma Kaschins | 52 | Wife | — | Germany |
| 29 | Dorothy Kaschins | 21 | Daughter | Clerical | Illinois |
| 30 | Anthony Walther | 27 | Son-in-law | Tabulator | Illinois |
| 31 | Marie Walther | 27 | Daughter | Stenographer | Illinois |
| 32 | Theodore Neven | 46 | Head | Shipping Clerk | Illinois |
| 33 | Cecelia Neven | 42 | Wife | — | Illinois |
| 34 | Donald Neven | 16 | Son | — | Illinois |
| 35 | Delphine Neven | 13 | Daughter | — | Illinois |
| 36 | Ella Mccurry | 71 | Head | — | Indiana |
| 37 | Max Nielsen | 50 | Head | Printer | Illinois |
| 38 | Catherine Nielsen | 56 | Wife | — | Illinois |
| 39 | Alex Welch | 45 | Nephew | Night Watchman | Illinois |
| 40 | Henry Jarco | 16 | Boarder | — | 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)