JH
John Hayden — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this John Hayden across the 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a son (b.~1923), then head of a 6-person household.
Age 17
b. ~1923
Male
Son
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Hayden |
| Given Name | John Jr |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago city |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Class of Worker | 0 |
| Highest Grade | Hs 3 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Chicago City |
| Est. Birth Year | ~1923 |
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 John | Age | Birth yr |
|---|---|---|---|---|
| Mary Hayden | Daughter | — | 22 | ~1918 |
| John Hayden | Son | — | 17 | ~1923 |
| James Hayden | Son | — | 16 | ~1924 |
| Kathleen Hayden | Daughter | — | 20 | ~1920 |
| Helen Hayden | Spouse | — | 52 | ~1888 |
| John Hayden | Head | — | 60 | ~1880 |
Census Appearances
1930
Cook, Illinois
Son, age 7
Cook, Illinois · implied b. ~1923 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hayden |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 7 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Irish Free State |
| Mother's Birthplace | Irish Free State |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Son, age 17
Cook-County, Illinois · implied b. ~1923 — 6 household members
| Surname | Hayden |
| Given Name | John Jr |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago city |
| 1935 Residence (County) | Cook |
| Class of Worker | 0 |
| Highest Grade | Hs 3 |
| 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 John Hayden across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Hayden
Son · 1940 · age 17 · b. ~1923 · Illinois
★ You are viewing this record
Sibling
Mary Hayden
Sibling · 1940 · age 22
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Hayden
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Kathleen Hayden
Sibling · 1940 · age 20
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-t0627-00983-00752)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Walter Dabrowski | 36 | Head | — | Poland |
| 42 | Frances Dabrowski | 37 | Wife | — | Poland |
| 43 | Walter Dabrowski | 25 | Son | Handy-Man | Illinois |
| 44 | Joseph Dabrowski | 26 | Son | Truck-Helper | Illinois |
| 45 | Bernice Dabrowski | 22 | Daughter | Punch Press Oper | Illinois |
| 46 | Josephine Dabrowski | 21 | Daughter | Inspector | Illinois |
| 47 | Edward Dabrowski | 19 | Son | Bus Boy | Illinois |
| 48 | Matthew Dabrowski | 18 | Son | New Worker | Illinois |
| 49 | Henry Dabrowski | 16 | Son | — | Illinois |
| 50 | Alex Dabrowski | 15 | Son | — | Illinois |
| 51 | Nickolas Koryluk | 42 | Head | Janitor | Ukraine |
| 52 | Kate Koryluk | 37 | Wife | — | Canada |
| 53 | Mary Koryluk | 22 | Daughter | Typist | Canada |
| 54 | Olga Koryluk | 19 | Daughter | — | Canada |
| 55 | Eugene Koryluk | 11 | Son | — | Illinois |
| 56 | Nick Manos | 52 | Head | Chef | Greece |
| 57 | Julia Manos | 57 | Wife | — | Greece |
| 58 | Julia Manos | 29 | Daughter | Dress Operator | Massachusetts |
| 59 | Mike Asim | 35 | Son law | Catterer | Greece |
| 60 | Stella Asim | 25 | Daughter | Counter-Girl | Greece |
| 61 | George Szymko | 54 | Head | Stationary-Engineer | Poland |
| 62 | Mary Szymko | 48 | Wife | Scrub Woman | Poland |
| 63 | John Szymko | 22 | Son | Print Shop Helper | Illinois |
| 64 | Pauline Szymko | 19 | Daughter | Assembler | Illinois |
| 65 | Eleanor Szymko | 17 | Daughter | — | Illinois |
| 66 | Edward Szymko | 15 | Son | — | Illinois |
| 67 | Julius Szymko | 13 | Son | — | Illinois |
| 68 | John Hayden | 60 | Head | Conductor | Ireland |
| 69 | Helen Hayden | 52 | Wife | — | Ireland |
| 70 | Mary Hayden | 22 | Daughter | Candy Wrapper | Illinois |
| 71 | Kathleen Hayden | 20 | Daughter | Librarian-Student | Illinois |
| 72 | John Jr Hayden THIS PERSON | 17 | Son | — | Illinois |
| 73 | James Hayden | 16 | Son | — | Illinois |
| 74 | Richard Curtin | 31 | Head | Rate Clerk | Illinois |
| 75 | Irene Curtin | 30 | Wife | — | Illinois |
| 76 | Ruth Curtin | 5 | Daughter | — | Illinois |
| 77 | Frank Dehage | 66 | Head | Machinist | Austria |
| 78 | Minnie Dehage | 55 | Wife | — | Austria |
| 79 | Delores Dehage | 28 | Daughter | Typist | Illinois |
| 80 | Harry Berk | 55 | Head | Carpenter | Russia |
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)