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Mary Gibbons — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Mary Gibbons across the 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a daughter (b.~1924), then head of a 7-person household.
Age 16
b. ~1924
Female
Daughter
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Gibbons |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Highest Grade | H-2 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Chicago City |
| 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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| James Gibbons | Son | — | 18 | ~1922 |
| Rita Gibbons | Daughter | — | 10 | ~1930 |
| Catherine Gibbons | Daughter | — | 7 | ~1933 |
| Mary Gibbons | Daughter | — | 16 | ~1924 |
| Thomas Gibbons | Son | — | 14 | ~1926 |
| James Gibbons | Head | — | 42 | ~1898 |
| Mary Gibbons | Spouse | — | 42 | ~1898 |
Census Appearances
1930
Cook, Illinois
Daughter, age 5
Cook, Illinois · implied b. ~1925 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Gibbons |
| Given Name | Mary Lou |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Nebraska |
| Mother's Birthplace | Missouri |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Daughter, age 16
Cook-County, Illinois · implied b. ~1924 — 7 household members
| Surname | Gibbons |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Highest Grade | H-2 |
| 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 Mary Gibbons across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Gibbons
Daughter · 1940 · age 16 · b. ~1924 · Illinois
★ You are viewing this record
Sibling
Catherine Gibbons
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas Gibbons
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Gibbons
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Rita Gibbons
Sibling · 1940 · age 10
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-t0627-00951-00080)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Adeline Kwiatkowski | 20 | Daughter | Packer | Illinois |
| 42 | Rose Kwiatkowski | 37 | Daughter | — | Illinois |
| 43 | Lorraine Kwiatkowski | 8 | Grand daughter | — | Illinois |
| 44 | Florence Kwiatkowski | 6 | Grand dau | — | Illinois |
| 45 | Walter L. Nachleber | 46 | Head | Doctor Of Medicine | Illinois |
| 46 | Eunice D. Nachleber | 45 | Wife | — | Illinois |
| 47 | June Nachleber | 15 | Daughter | — | Illinois |
| 48 | Ruth Nachleber | 11 | Daughter | — | Illinois |
| 49 | Doris Nachleber | 8 | Daughter | — | Illinois |
| 50 | Richard Nachleber | 3 | Son | — | Illinois |
| 51 | Robert Nachleber | 2 | Son | — | Illinois |
| 52 | Frederick Nachleber | 2 | Son | — | Illinois |
| 53 | Maria Nachleber | 74 | Head | — | Germany |
| 54 | Herbert Manthey | 31 | Head | Teller | Illinois |
| 55 | Selma Manthey | 30 | Wife | — | Illinois |
| 56 | Emma Rossin | 44 | Head | — | Michigan |
| 57 | Elmer Rossin | 25 | Son | — | Illinois |
| 58 | Robert Rossin | 16 | Son | — | Illinois |
| 59 | Gloria Rossin | 13 | Daughter | — | Michigan |
| 60 | Jenny Bukowski | 31 | Head | Butcher | Illinois |
| 61 | Florence Bukowski | 29 | Wife | Butcher | Illinois |
| 62 | Frank Mankowski | 52 | Head | Telegrapher | Poland |
| 63 | Helen Mankowski | 42 | Wife | Cleaner | Poland |
| 64 | Lorraine Mankowski | 18 | Daughter | Secretary | Illinois |
| 65 | Frank Jr. Mankowski | 16 | Son | — | Illinois |
| 66 | Robert Mankowski | 11 | Son | — | Illinois |
| 67 | Mary A. Michalak | 68 | Mother-in-law | — | Poland |
| 68 | Isidore Gilakey | 58 | Head | Buyer | Iowa |
| 69 | Marybelle Gilakey | 48 | Wife | Teacher | Illinois |
| 70 | Rita Gilakey | 20 | Daughter | — | Montana |
| 71 | Lucille Gilakey | 17 | Daughter | — | Illinois |
| 72 | Marybelle Gilakey | 8 | Daughter | — | Illinois |
| 73 | Loretta Gilakey | 5 | Daughter | — | Illinois |
| 74 | James Gibbons | 42 | Head | Officer (Police) | Irish Free State |
| 75 | Mary Gibbons | 42 | Wife | — | Illinois |
| 76 | James Jr. Gibbons | 18 | Son | — | Illinois |
| 77 | Mary Gibbons THIS PERSON | 16 | Daughter | — | Illinois |
| 78 | Thomas Gibbons | 14 | Son | — | Illinois |
| 79 | Rita Gibbons | 10 | Daughter | — | Illinois |
| 80 | Catherine Gibbons | 7 | 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)