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Mary Mulligan — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Will-County, Illinois
Our Model Tree links this Mary Mulligan across the 1930 and 1940 US Censuses in Will-County, Illinois (XGBoost, ~Confirmed) — first a daughter (b.~1926), then head of a 7-person household.
Age 14
b. ~1926
Female
Daughter
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Will-County, Illinois |
| Surname | Mulligan |
| Given Name | Mary |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Braidwood City |
| 1935 Residence (County) | Will |
| Additional Details | |
| Highest Grade | Hs 1 |
| 1935 Residence | Same Place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Braidwood City |
| Est. Birth Year | ~1926 |
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 |
|---|---|---|---|---|
| Hugh Mulligan | Son | — | 4 | ~1936 |
| Mary Mulligan | Daughter | — | 14 | ~1926 |
| Lucy Mulligan | Spouse | — | 41 | ~1899 |
| Eliza Mulligan | Daughter | — | 9 | ~1931 |
| Irene Mulligan | Daughter | — | 17 | ~1923 |
| John Mulligan | Son | — | 19 | ~1921 |
| Hugh Mulligan | Head | — | 60 | ~1880 |
Census Appearances
1930
Will, Illinois
Daughter, age 4
Will, Illinois · implied b. ~1926 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mulligan |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Illinois |
| Can Read/Write | No |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Will-County, Illinois
Daughter, age 14
Will-County, Illinois · implied b. ~1926 — 7 household members
| Surname | Mulligan |
| Given Name | Mary |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Braidwood City |
| 1935 Residence (County) | Will |
| Highest Grade | Hs 1 |
| 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 Mulligan across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Mulligan
Daughter · 1940 · age 14 · b. ~1926 · Illinois
★ You are viewing this record
Sibling
John Mulligan
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Eliza Mulligan
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Irene Mulligan
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Hugh Mulligan
Sibling · 1940 · 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
1940 US Federal Census — Will-County, Illinois
Open full size
1940 US Federal Census — Will-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00909-00820)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Mildred Delmastro | 24 | daughter | Grade School Teacher | Illinois |
| 2 | Lawrence Pomatto | 39 | head | Assembler | Illinois |
| 3 | Eva Pomatto | 24 | wife | — | Illinois |
| 4 | Lawrence Pomatto | 14 | son | — | Illinois |
| 5 | Benjamin Hale | 25 | head | Laborer | Illinois |
| 6 | Lilly Hale | 24 | wife | — | Illinois |
| 7 | Benny Hale | 5 | son | — | Illinois |
| 8 | Thomas Hale | 3 | son | — | Illinois |
| 9 | Caroline Hale | 1 | daughter | — | Illinois |
| 10 | Theresa Russa | 80 | head | — | Italy |
| 11 | Antone Russa | 52 | son | — | Illinois |
| 12 | Mary Russa | 51 | daughter | Secretary | Illinois |
| 13 | Felix A. Pichon | 45 | head | Pumper | Illinois |
| 14 | Olive H. Pichon | 45 | wife | — | Illinois |
| 15 | Martha A. Pichon | 23 | daughter | Grade Teacher | Illinois |
| 16 | Dorothy L. Pichon | 21 | daughter | — | Illinois |
| 17 | Andrew Berta | 55 | head | Laborer | Illinois |
| 18 | Martha Berta | 49 | wife | — | Italy |
| 19 | James Berta | 28 | son | Laborer | Illinois |
| 20 | Joseph Berta | 27 | son | Farm-Helper | Illinois |
| 21 | Andrew Berta | 24 | son | Laborer | Illinois |
| 22 | William Berta | 22 | son | Farm-Helper | Illinois |
| 23 | Rose Mary Berta | 12 | daughter | — | Illinois |
| 24 | Teresa Valetti | 74 | head | — | Italy |
| 25 | Hugh Mulligan | 60 | head | Mail-Clerk | Scotland |
| 26 | Lucy Mulligan | 41 | wife | — | Illinois |
| 27 | John Mulligan | 19 | son | Freight Clerk | Illinois |
| 28 | Irene Mulligan | 17 | daughter | — | Illinois |
| 29 | Mary Mulligan THIS PERSON | 14 | daughter | — | Illinois |
| 30 | Eliza Isabella Mulligan | 9 | daughter | — | Illinois |
| 31 | Hugh Jr. Mulligan | 4 | son | — | Illinois |
| 32 | George Hufford | 56 | head | Laborer | Illinois |
| 33 | Jennie Hufford | 53 | wife | — | Illinois |
| 34 | M. J. Donna | 60 | head | Music Composer Teacher | Italy |
| 35 | Esther Donna | 52 | wife | — | Illinois |
| 36 | Lucille Krahulec | 31 | daughter | — | Illinois |
| 37 | Mary C. Shumkan | 20 | niece | Stenographer | Illinois |
| 38 | Frank Vojtkocik | 73 | head | — | Slovakia |
| 39 | Helen Vojtkocik | 72 | wife | — | Slovakia |
| 40 | Tom Walters | 81 | head | — | Michigan |
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)