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John Conroy — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Cook, Illinois
Our Model Tree links this John Conroy across the 1920 and 1930 US Censuses in Cook, Illinois (XGBoost, ~Confirmed) — first a son (b.~1910), then head of a 10-person household.
Age 20
b. ~1910
Male
Son
Born: Pennsylvania
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Cook, Illinois |
| Surname | Conroy |
| Given Name | John |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Age at First Marriage | 20 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Additional Details | |
| Occupation | Collector |
| Industry | Furniture Store |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Occupation | Collector |
| Township / Ward | City Of Chicago |
| Est. Birth Year | ~1910 |
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.
10 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Martin Conroy | Son | — | 11 | ~1919 |
| Catherine Conroy | Daughter | — | 13 | ~1917 |
| William Conroy | Son | — | 9 | ~1921 |
| John Conroy | Son | — | 20 | ~1910 |
| James Conroy | Son | — | 15 | ~1915 |
| Rose Conroy | Spouse | — | 43 | ~1887 |
| Michael Conroy | Son | — | 17 | ~1913 |
| Catherine Conroy | Daughter | — | 7 | ~1923 |
| Margaret Conroy | Daughter | — | 5 | ~1925 |
| John Conroy | Head | — | 41 | ~1889 |
Census Appearances
1920
Cook, Illinois
Son, age 9
Cook, Illinois · implied b. ~1911 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Conroy |
| Given Name | John J |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 9 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1930
Cook, Illinois
Son, age 20
Cook, Illinois · implied b. ~1910 — 10 household members
| Surname | Conroy |
| Given Name | John |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Age at First Marriage | 20 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Collector |
| Industry | Furniture Store |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
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 Conroy across 2 US Census years (1920 and 1930) in Cook, Illinois, using XGBoost record linkage.
Show:
This person
Anchor record
John Conroy
Son · 1930 · age 20 · b. ~1910 · Illinois
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Sibling
Michael Conroy
Sibling · 1930 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Conroy
Sibling · 1930 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Conroy
Sibling · 1930 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Catherine Conroy
Sibling · 1930 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Conroy
Sibling · 1930 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Martin Conroy
Sibling · 1930 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Catherine Conroy
Sibling · 1930 · age 7
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
1930 US Federal Census — Cook, Illinois
Open full size
1930 US Federal Census — Cook, Illinois
Page Contents
50 people indexed on this census page (ia:1930:illinoiscensus00reel444:0798)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Rose Mathews | 8 | daughter | None | Illinois |
| 52 | Peter Mathews | 6 | son | None | Illinois |
| 53 | Thomas Mathews | 4 | son | None | Illinois |
| 54 | Mary Ellen Regan | 13 | H. daughter | None | Illinois |
| 55 | Julia Regan | 11 | H. daughter | None | Illinois |
| 56 | John Conroy | 41 | head | Fireman | Ireland |
| 57 | Rose Conroy | 43 | wife | None | Ireland |
| 58 | John Conroy THIS PERSON | 20 | son | Collector | Pennsylvania |
| 59 | Michael Conroy | 17 | son | Checker | Illinois |
| 60 | James Conroy | 15 | son | None | Illinois |
| 61 | Catherine Conroy | 13 | daughter | None | Illinois |
| 62 | Martin Conroy | 11 | son | None | Illinois |
| 63 | William Conroy | 9 | son | None | Illinois |
| 64 | Catherine Conroy | 7 | daughter | None | Illinois |
| 65 | Margaret Conroy | 5 | daughter | None | Illinois |
| 66 | Eugene Marchi | 34 | head | Clerk | Illinois |
| 67 | Agnes Marchi | 30 | wife | None | North Dakota |
| 68 | Mary E Marchi | 6 | daughter | None | Illinois |
| 69 | Eugene Marchi | 4 | son | None | Illinois |
| 70 | Peter Mcnamara | 57 | head | Porter | Ireland |
| 71 | Mary Mcnamara | 43 | wife | None | Ireland |
| 72 | Evelyn Mcnamara | 15 | daughter | None | Illinois |
| 73 | Harry Jacobson | 27 | head | City Fireman | Illinois |
| 74 | Mary Jacobson | 26 | wife | None | Illinois |
| 75 | Harry Jacobson | 2 | son | None | Illinois |
| 76 | Florence Jacobson | 1 | daughter | None | Illinois |
| 77 | Paul Kleikamp | 56 | head | Painter | Illinois |
| 78 | Sophie Kleikamp | 53 | wife | None | Germany |
| 79 | Bob Nicklausen | 20 | son | Machinist | Illinois |
| 80 | Carl Nicklausen | 24 | son | None | Illinois |
| 81 | Mildred Nicklausen | 23 | wife | None | Illinois |
| 82 | Charles Nicklausen | 3 | son | None | Illinois |
| 83 | James Nicklausen | 1 | son | None | Illinois |
| 84 | Charles E Flynn | 56 | head | Machinist | Illinois |
| 85 | Julia Flynn | 57 | wife | None | Illinois |
| 86 | Edmund Flynn | 23 | son | Comptometer | Illinois |
| 87 | Velma Flynn | 21 | daughter | None | Illinois |
| 88 | Richard Flynn | 15 | son | None | Illinois |
| 89 | William Naylor | 37 | head | Foreman | Tennessee |
| 90 | Francis Naylor | 25 | wife | None | Poland |
| 91 | Francis Naylor | 5 | daughter | None | Illinois |
| 92 | Donald Naylor | 3 | son | None | Illinois |
| 93 | Jacob Medema | 33 | head | Salesman | Illinois |
| 94 | Henrietta Medema | 32 | wife | None | Illinois |
| 95 | Cornelius Medema | 5 | son | None | Illinois |
| 96 | Grace Medema | 0 | daughter | None | Illinois |
| 97 | Joseph Breen | 42 | head | Engineer | Illinois |
| 98 | Julia Breen | 36 | wife | None | Illinois |
| 99 | Joseph Breen | 10 | son | None | Illinois |
| 100 | Robert Breen | 3 | son | None | Illinois |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1930 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)