JM
John Maguire — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this John Maguire across the 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a son (b.~1924), then head of a 10-person household.
Age 16
b. ~1924
Male
Son
Born: Ohio
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Maguire |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Ohio |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Class of Worker | 0 |
| Hours Worked | 0 |
| Highest Grade | H-1 |
| 1935 Residence | Same place |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
| Township / Ward | Chicago |
| 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.
10 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Leo Maguire | Son | — | 21 | ~1919 |
| Rose Maguire | Daughter | — | 7 | ~1933 |
| Daniel Maguire | Head | — | 45 | ~1895 |
| Vincent Maguire | Son | — | 18 | ~1922 |
| Esther Maguire | Spouse | — | 48 | ~1892 |
| Charles Maguire | Son | — | 20 | ~1920 |
| Mary Collett | Other | — | 80 | ~1860 |
| James Maguire | Son | — | 23 | ~1917 |
| Daniel Maguire | Son | — | 13 | ~1927 |
| John Maguire | Son | — | 16 | ~1924 |
Census Appearances
1930
Cook, Illinois
Son, age 6
Cook, Illinois · implied b. ~1924 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Maguire |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 6 |
| Marital Status | Single |
| Birthplace | Ohio |
| Father's Birthplace | Delaware |
| Mother's Birthplace | Delaware |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
1940
Cook-County, Illinois
Son, age 16
Cook-County, Illinois · implied b. ~1924 — 10 household members
| Surname | Maguire |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Ohio |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Class of Worker | 0 |
| Hours Worked | 0 |
| Highest Grade | H-1 |
| 1935 Residence | Same place |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
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 Maguire across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Maguire
Son · 1940 · age 16 · b. ~1924 · Illinois
★ You are viewing this record
Sibling
Vincent Maguire
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Daniel Maguire
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Maguire
Sibling · 1940 · age 23
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Leo Maguire
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Rose Maguire
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Charles Maguire
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-t0627-01004-00232)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Edward Fick | 17 | Son | — | Illinois |
| 2 | Nicholas Klein | 54 | Brother | Laborer | Illinois |
| 3 | Warren Delee | 39 | Head | Painter Decorator | Illinois |
| 4 | Ester Delee | 39 | Wife | — | Illinois |
| 5 | Howard E. Thomas | 30 | Head | Special Agent | Ohio |
| 6 | Mary A. Thomas | 34 | Wife | — | Wisconsin |
| 7 | William H. Thomas | 8 | Son | — | Illinois |
| 8 | Robert E. Thomas | 5 | Son | — | Illinois |
| 9 | Roy Lund | 38 | Brother-in-law | Salesman | Illinois |
| 10 | Ann Lund | 34 | Sister | — | Illinois |
| 11 | Robert Lund | 1 | Nephew | — | Illinois |
| 12 | Albert Shellander | 45 | Head | Electrician | Hungary |
| 13 | Josephine Shellander | 41 | Wife | — | Wisconsin |
| 14 | Margaret Shellander | 14 | Daughter | — | Illinois |
| 15 | Albert Shellander | 12 | Son | — | Illinois |
| 16 | Gloria Shellander | 11 | Daughter | — | Illinois |
| 17 | Violette Shellander | 6 | Daughter | — | Illinois |
| 18 | Leo Sturt | 44 | Head | Plumber | Illinois |
| 19 | Helen Sturt | 45 | Wife | — | Illinois |
| 20 | George Proot | 26 | Head | Laborer | Illinois |
| 21 | Blanche Proot | 19 | Daughter-in-law | Manicurist | Illinois |
| 22 | Daniel Maguire | 45 | Head | Waitress | Delaware |
| 23 | Esther Maguire | 48 | Wife | — | Delaware |
| 24 | James Jr. Maguire | 23 | Son | Office Clerk | Delaware |
| 25 | Leo Maguire | 21 | Son | Office Clerk | Delaware |
| 26 | Charles Maguire | 20 | Son | Messenger Boy | Delaware |
| 27 | Vincent Maguire | 18 | Son | Stock Boy | Ohio |
| 28 | John Maguire THIS PERSON | 16 | Son | — | Ohio |
| 29 | Daniel Maguire | 13 | Son | — | Illinois |
| 30 | Rose Maguire | 7 | Daughter | — | Illinois |
| 31 | Mary Collett | 80 | Aunt | — | Delaware |
| 32 | Angeline Walsh | 52 | Head | — | Poland |
| 33 | Stanley Walsh | 23 | Son | Office Work | Illinois |
| 34 | John Kierzyk | 27 | Son-in-law | Wood Turner | Poland |
| 35 | Ann Kierzyk | 26 | Daughter | Laborer | Illinois |
| 36 | John Kierzyk | 4 | Grandson | — | Illinois |
| 37 | Fredrick Wiegel | 52 | Head | Cement Worker | Russia |
| 38 | Dorothy Wiegel | 51 | Wife | — | Russia |
| 39 | Emily Wiegel | 20 | Daughter | Laborer | Illinois |
| 40 | Selma Wiegel | 16 | Daughter | — | 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)