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John Rooney — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this John Rooney across the 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a son (b.~1928), then head of a 6-person household.
Age 12
b. ~1928
Male
Son
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Rooney |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Highest Grade | 6 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Chicago |
| Est. Birth Year | ~1928 |
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 |
|---|---|---|---|---|
| Margaret Rooney | Daughter | — | 14 | ~1926 |
| Helen Rooney | Daughter | — | 8 | ~1932 |
| Mary Rooney | Daughter | — | 16 | ~1924 |
| David Rooney | Head | — | 49 | ~1891 |
| Anna Rooney | Spouse | — | 40 | ~1900 |
| John Rooney | Son | — | 12 | ~1928 |
Census Appearances
1930
Cook, Illinois
Son, age 2
Cook, Illinois · implied b. ~1928 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Rooney |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Northern Ireland |
| Mother's Birthplace | Illinois |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Son, age 12
Cook-County, Illinois · implied b. ~1928 — 6 household members
| Surname | Rooney |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Highest Grade | 6 |
| 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 Rooney across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Rooney
Son · 1940 · age 12 · b. ~1928 · Illinois
★ You are viewing this record
Sibling
Mary Rooney
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Rooney
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Helen Rooney
Sibling · 1940 · age 8
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-t0627-00957-00777)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | David Rooney | 49 | Head | Carpenter | Northern Ireland |
| 2 | Anna Rooney | 40 | Wife | — | Irish Free State |
| 3 | Mary Rooney | 16 | Daughter | — | Illinois |
| 4 | Margaret Rooney | 14 | Daughter | — | Illinois |
| 5 | John Rooney THIS PERSON | 12 | Son | — | Illinois |
| 6 | Helen Rooney | 8 | Daughter | — | Illinois |
| 7 | Helen Scully | 40 | Head | Dressmaker | Alabama |
| 8 | Margaret Wilkinson | 34 | Head | Housework | Illinois |
| 9 | Bert Wilkinson | 9 | Son | — | Illinois |
| 10 | Emma Margis | 75 | Head | — | Germany |
| 11 | Myrtle Margis | 36 | Daughter | Stitching Machine Operator | Illinois |
| 12 | Edna Margis | 36 | Daughter | Clerk-Typist | Illinois |
| 13 | Fred Gelder | 51 | Step son | C.C.C. Enrollee In Lake Camp | New York |
| 14 | Robert Nelsen | 51 | Head | Route Truck Driver | Illinois |
| 15 | Mildred Nelsen | 44 | Wife | — | Illinois |
| 16 | Fay Peterson | 61 | Head | Carpenter | Michigan |
| 17 | R. J. Peterson | 59 | Wife | — | Holland |
| 18 | Albert Kleinheizen | 42 | Head | Laborer | Holland |
| 19 | Mary Kleinheizen | 38 | Wife | Solderer | Illinois |
| 20 | David Boss | 69 | Father-in-law | — | Holland |
| 21 | Homer Palmiter | 55 | Head | Printer | Michigan |
| 22 | Alice Palmiter | 55 | Wife | — | Illinois |
| 23 | Ida Palmiter | 17 | Daughter | — | Illinois |
| 24 | Robert White | 13 | Lodger | — | Illinois |
| 25 | Susanne Van Hulzen | 68 | Head | — | Illinois |
| 26 | Arthur Van Hulzen | 26 | Son | Milk Route Man | Illinois |
| 27 | Henry Teemsma | 50 | Head | Salesman | Illinois |
| 28 | Jennie Kampstra | 38 | Housekeeper | Housekeeper | Holland |
| 29 | Sam Kosi | 68 | Head | — | Holland |
| 30 | Therese Kosi | 65 | Wife | — | Holland |
| 31 | Ralph Kosi | 28 | Son | — | Holland |
| 32 | Edward Riley | 73 | Head | — | Illinois |
| 33 | Julia Riley | 69 | Wife | — | Illinois |
| 34 | Eleanor Kelly | 40 | Daughter | Stenographer | Illinois |
| 35 | Francis Kelly | 16 | Grandson | — | Illinois |
| 36 | Richard Clifford | 22 | Head | Shipping Clerk | Illinois |
| 37 | Florence Clifford | 18 | Wife | — | Illinois |
| 38 | Richard Thomas Clifford | None | Son | — | Illinois |
| 39 | Victor Soderberg | 73 | Head | Barber | Sweden |
| 40 | Alma Soderberg | 68 | Wife | — | Sweden |
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)