MC
Mary Cronin — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Mary Cronin across the 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a spouse (b.~1890), then head of a 8-person household.
Age 50
b. ~1890
Female
Spouse
Born: Irish Free State
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Cronin |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 50 |
| Marital Status | Married |
| Birthplace | Irish Free State |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Naturalization Status | Naturalized |
| Additional Details | |
| Class of Worker | 0 |
| Hours Worked | 4 |
| Highest Grade | 8 |
| 1935 Residence | Same house |
| Birthplace (normalized) | irish free state |
| Township / Ward | Chicago |
| Est. Birth Year | ~1890 |
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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Cronin | Spouse | — | 50 | ~1890 |
| Patrick Cronin | Head | — | 57 | ~1883 |
| Edward Cronin | Son | — | 12 | ~1928 |
| John Cronin | Son | — | 25 | ~1915 |
| Walter Cronin | Son | — | 20 | ~1920 |
| Theresa Cronin | Daughter | — | 14 | ~1926 |
| Bernard Cronin | Son | — | 22 | ~1918 |
| Francis Cronin | Son | — | 19 | ~1921 |
Census Appearances
1930
Cook, Illinois
Other, age 41
Cook, Illinois · implied b. ~1889 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cronin |
| Given Name | Mary |
| Relationship to Head | Sister-H |
| Sex | F |
| Color / Race | White |
| Age | 41 |
| Marital Status | Single |
| Birthplace | Irish Free State |
| Age at First Marriage | 1905 |
| Father's Birthplace | Irish Free State |
| Mother's Birthplace | Irish Free State |
| Occupation | none |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Birthplace (normalized) | irish free state |
1940
Cook-County, Illinois
Spouse, age 50
Cook-County, Illinois · implied b. ~1890 — 8 household members
| Surname | Cronin |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 50 |
| Marital Status | Married |
| Birthplace | Irish Free State |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Naturalization Status | Naturalized |
| Class of Worker | 0 |
| Hours Worked | 4 |
| Highest Grade | 8 |
| 1935 Residence | Same house |
| Birthplace (normalized) | irish free state |
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 Cronin across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Cronin
Spouse · 1940 · age 50 · b. ~1890 · Illinois
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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-t0627-00953-00780)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Frank Mcnamara | 18 | Head | — | Illinois |
| 42 | Charles Kelley | 36 | Head | Radio Service | Indiana |
| 43 | Carol Kelley | 33 | Wife | — | Illinois |
| 44 | Phyllis Kelley | 3 | Daughter | 0 | Illinois |
| 45 | Patrick Cronin | 57 | Head | Motorman | Irish Free State |
| 46 | Mary Cronin THIS PERSON | 50 | Wife | — | Irish Free State |
| 47 | John Cronin | 25 | Son | Trucker | Illinois |
| 48 | Bernard Cronin | 22 | Son | Bell Boy | Illinois |
| 49 | Walter Cronin | 20 | Son | New Worker | Illinois |
| 50 | Francis Cronin | 19 | Son | New Worker | Illinois |
| 51 | Theresa Cronin | 14 | Daughter | — | Illinois |
| 52 | Edward Cronin | 12 | Son | — | Illinois |
| 53 | Edward Voltz | 27 | Head | Bookkeeper | Illinois |
| 54 | Susan Voltz | 22 | Wife | — | Illinois |
| 55 | Robert Voltz | 2 | Son | 0 | Illinois |
| 56 | William Voltz | 2 | Son | 0 | Illinois |
| 57 | Charles Voltz | 72 | Head | — | Illinois |
| 58 | George W. Voltz | 39 | Son | Electrician | Illinois |
| 59 | Alexander Voltz | 35 | Son | — | Illinois |
| 60 | Charles Voltz | 6 | Grandson | 0 | Illinois |
| 61 | Phyllis Voltz | 2 | Granddaughter | 0 | Illinois |
| 62 | Clarence Zimmerman | 39 | Head | Undertaker | Illinois |
| 63 | Martha Zimmerman | 38 | Wife | — | Illinois |
| 64 | Robert Zimmerman | 14 | Son | — | Illinois |
| 65 | Carrie Gavin | 74 | Mother-in-law | — | Illinois |
| 66 | William Lundie | 45 | Head | Locomotive Engineer | Illinois |
| 67 | Fretzie Lundie | 45 | Wife | — | Illinois |
| 68 | Laverne Lundie | 10 | Daughter | — | Illinois |
| 69 | Mary Ludwig | 75 | Mother-in-law | — | Germany |
| 70 | Henry Wolf | 39 | Head | Insurance Adj. | Illinois |
| 71 | Alice Wolf | 31 | Wife | — | Wisconsin |
| 72 | Richard Wolf | 13 | Son | 0 | Illinois |
| 73 | Kenneth Wolf | 12 | Son | 0 | Illinois |
| 74 | Alvin Burger | 37 | Head | Finance Clerk | Illinois |
| 75 | Oma Burger | 36 | Wife | — | Illinois |
| 76 | Phillip Clark | 52 | Head | Cook | Illinois |
| 77 | Mary Clark | 51 | Wife | — | Illinois |
| 78 | Timothy Clark | 46 | Brother | Bartender | Illinois |
| 79 | Daniel Clark | 44 | Brother | — | Illinois |
| 80 | Ray Clark | 18 | Nephew | Usher | 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)