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Mary Gill — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Cook, Illinois
Our Model Tree links this Mary Gill across the 1930 and 1940 US Censuses in Cook, Illinois (XGBoost, ~Confirmed) — first a daughter (b.~1924), then head of a 7-person household.
Age 6
b. ~1924
Female
Daughter
Born: Illinois
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Cook, Illinois |
| Surname | Gill |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 6 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Oklahoma |
| Mother's Birthplace | Nebraska |
| Additional Details | |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| 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.
7 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Gill | Daughter | — | 6 | ~1924 |
| James Gill | Son | — | 8 | ~1922 |
| Mary Gill | Spouse | — | 23 | ~1907 |
| Virginia Gill | Daughter | — | 7 | ~1923 |
| Margaret Gill | Daughter | — | 3 | ~1927 |
| Thomas Gill | Head | — | 31 | ~1899 |
| Thos Gill | Son | — | 4 | ~1926 |
Census Appearances
1930
Cook, Illinois
Daughter, age 6
Cook, Illinois · implied b. ~1924 — 7 household members
| Surname | Gill |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 6 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Oklahoma |
| Mother's Birthplace | Nebraska |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Daughter, age 17
Cook-County, Illinois · implied b. ~1923 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Galle |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Highest Grade | No 8 |
| 1935 Residence | Same house |
| 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 Gill across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Gill
Daughter · 1930 · age 6 · b. ~1924 · Illinois
★ You are viewing this record
Sibling
Virginia Gill
Sibling · 1930 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Gill
Sibling · 1930 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Gill
Sibling · 1930 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thos Gill
Sibling · 1930 · age 4
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:illinoiscensus00reel456:0026)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | John Connelly | 60 | Head | Clerk | New York |
| 52 | Anna Connelly | 72 | Wife | — | Massachusetts |
| 53 | Joe Wilson | 50 | Head | Porter | Illinois |
| 54 | Paul Hoffman | 49 | Roomer | Laborer | Wisconsin |
| 55 | Christine Driscoll | 43 | Head | Clerical | Illinois |
| 56 | Catherine Dalton | 70 | Mother | — | Canada English |
| 57 | Frank Goat | 52 | Roomer | Teamster | Ohio |
| 58 | Rose Charlends | 47 | Head | — | Italy |
| 59 | Mary Esposito | 37 | Daughter | Helper | Illinois |
| 60 | Leonard Esposito | 17 | Child | — | Illinois |
| 61 | Mary Esposito | 15 | Child | — | Illinois |
| 62 | Joseph Esposito | 13 | Child | — | Illinois |
| 63 | Frank Barone | 27 | Boarder | Tailor | Italy |
| 64 | Frank Barone | 35 | Boarder | Tailor | Italy |
| 65 | Wesley C Calya | 47 | Head | Laborer | Kentucky |
| 66 | Gertrude Calya | 37 | Wife | — | Illinois |
| 67 | George Calya | 14 | Son | — | Nebraska |
| 68 | Gertrude Calya | 12 | Daughter | — | Nebraska |
| 69 | Wesley Jr Calya | 10 | Son | — | Nebraska |
| 70 | Eugene Calya | 6 | Son | — | Nebraska |
| 71 | James Mugnai | 21 | Head | Polisher | Illinois |
| 72 | Nellie Mugnai | 21 | Wife | — | Illinois |
| 73 | Thomas Mickens | 52 | Head | Manager | Illinois |
| 74 | Elizabeth Mickens | 45 | Wife | — | Ohio |
| 75 | Joseph Caputo | 42 | Head | Cook | Italy |
| 76 | Rose Caputo | 35 | Wife | — | Illinois |
| 77 | Joe Jr Caputo | 14 | Son | — | Illinois |
| 78 | Theresa Marchese | 59 | Mother-in-law | — | Italy |
| 79 | Genevieve Marchese | 21 | Sister-in-law | Operator | Illinois |
| 80 | Rebecca Sullivan | 68 | Head | — | Canada English |
| 81 | John Bidan | 32 | Head | Clerical | Illinois |
| 82 | Jessie Bidan | 29 | Wife | — | Illinois |
| 83 | Eugene Bidan | 3 | Son | — | Illinois |
| 84 | Harry Bidan | 54 | Father | Painter | Wisconsin |
| 85 | Peter Miller | 39 | Roomer | Laborer | Wisconsin |
| 86 | William Peterson | 46 | Head | Helper | Illinois |
| 87 | Estelle Peterson | 43 | Wife | — | Illinois |
| 88 | Thomas Gill | 31 | Head | Chauffeur | Oklahoma |
| 89 | Mary Gill | 23 | Wife | — | Nebraska |
| 90 | James Gill | 8 | Son | — | Illinois |
| 91 | Virginia Gill | 7 | Daughter | — | Illinois |
| 92 | Mary Gill THIS PERSON | 6 | Daughter | — | Illinois |
| 93 | Thos. Jr Gill | 4 | Son | — | Illinois |
| 94 | Margaret Gill | 3 | Daughter | — | Illinois |
| 95 | Marie Rogers | 35 | Head | Demonstrator | Germany |
| 96 | Edward Ashley | 29 | Head | Helper | Missouri |
| 97 | Carrie Ashley | 30 | Wife | — | Illinois |
| 98 | Eleanor Ashley | 10 | Daughter | — | Illinois |
| 99 | Mildred Ashley | 8 | Daughter | — | Illinois |
| 100 | William Libby | 44 | Head | Chauffeur | New York |
Related Census Records
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)