JC
John Cavanaugh — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this John Cavanaugh across the 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a son (b.~1924), then head of a 9-person household.
Age 16
b. ~1924
Male
Son
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Cavanaugh |
| Given Name | John |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Hillside Village |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Hillside Village |
| Est. Birth Year | ~1924 |
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.
9 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Catherine Cavanaugh | Spouse | — | 52 | ~1888 |
| John Cavanaugh | Son | — | 16 | ~1924 |
| James Cavanaugh | Son | — | 9 | ~1931 |
| Michael Cavanaugh | Head | — | 52 | ~1888 |
| Mary Cavanaugh | Daughter | — | 20 | ~1920 |
| Michael Cavanaugh | Son | — | 14 | ~1926 |
| Daniel Cavanaugh | Son | — | 12 | ~1928 |
| Nora Cavanaugh | Daughter | — | 11 | ~1929 |
| Josephine Cavanaugh | Daughter | — | 17 | ~1923 |
Census Appearances
1930
Cook, Illinois
Son, age 7
Cook, Illinois · implied b. ~1923 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kavanaugh |
| Given Name | John D. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 7 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | New York |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Son, age 16
Cook-County, Illinois · implied b. ~1924 — 9 household members
| Surname | Cavanaugh |
| Given Name | John |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Hillside Village |
| 1935 Residence (County) | Cook |
| Highest Grade | No 8 |
| 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 Cavanaugh across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Cavanaugh
Son · 1940 · age 16 · b. ~1924 · Illinois
★ You are viewing this record
Sibling
Michael Cavanaugh
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Nora Cavanaugh
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Cavanaugh
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Daniel Cavanaugh
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Josephine Cavanaugh
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Cavanaugh
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-t0627-00787-00126)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Thomas Illingworth | 15 | son | — | Illinois |
| 42 | Richard Illingworth | 11 | son | — | Illinois |
| 43 | Robert Sr Aird | 84 | head | — | Scotland |
| 44 | Edward Hinckley | 43 | head | Pattern Maker | Illinois |
| 45 | Anna Hinckley | 41 | wife | — | Illinois |
| 46 | Edward Iii Hinckley | 21 | son | Machinist | Illinois |
| 47 | Ervin Lantz | 35 | head | Millwright | Illinois |
| 48 | Lucille Lantz | 31 | wife | — | Illinois |
| 49 | Ervin Jr Lantz | 13 | son | — | Illinois |
| 50 | Edith Lou Lantz | 11 | daughter | — | Illinois |
| 51 | Arthur Welling | 36 | head | Time Keeper | Illinois |
| 52 | Ruth Welling | 33 | wife | 26 | Illinois |
| 53 | Mary Jane Welling | 10 | daughter | — | Illinois |
| 54 | Elizabeth Welling | 6 | daughter | — | Illinois |
| 55 | James Comerford | 56 | head | Office Clerk | Irish Free State |
| 56 | Margaret Comerford | 56 | wife | — | Irish Free State |
| 57 | James Jr Comerford | 25 | son | Office Clerk | Illinois |
| 58 | Elizabeth Comerford | 24 | daughter | — | Illinois |
| 59 | Francis Comerford | 19 | son | Office Clerk | Illinois |
| 60 | Anna Moser | 61 | head | Cook | Czechoslovakia |
| 61 | Al Moser | 30 | lodger | Proprietor | Switzerland |
| 62 | Lucille Moser | 27 | lodger | Waitress | Wisconsin |
| 63 | Daniel Casey | 31 | head | Salesman | Missouri |
| 64 | Grace Casey | 27 | wife | 200 | Illinois |
| 65 | John Beverly Casey | 12 | daughter | — | Illinois |
| 66 | Daniel J Casey | 10 | son | — | Illinois |
| 67 | Robert Merle Casey | 3 | son | — | Illinois |
| 68 | John O'Rourke | 51 | lodger | Laborer | Irish Free State |
| 69 | Michael Cavanaugh | 52 | head | Laborer | Irish Free State |
| 70 | Catherine Cavanaugh | 52 | wife | — | Irish Free State |
| 71 | Mary Cavanaugh | 20 | daughter | Office Clerk | Illinois |
| 72 | Josephine Cavanaugh | 17 | daughter | — | Illinois |
| 73 | John Cavanaugh THIS PERSON | 16 | son | — | Illinois |
| 74 | Michael Jr Cavanaugh | 14 | son | — | Illinois |
| 75 | Daniel Cavanaugh | 12 | son | — | Illinois |
| 76 | Nora Cavanaugh | 11 | daughter | — | Illinois |
| 77 | James Cavanaugh | 9 | son | — | Illinois |
| 78 | John W Coleman | 40 | head | Meter Man | Irish Free State |
| 79 | Nora Coleman | 35 | wife | — | Illinois |
| 80 | John W Jr Coleman | 7 | son | — | 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)