MD
Mary Delaney — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Will-County, Illinois
Our Model Tree links this Mary Delaney across the 1920, 1930 and 1940 US Censuses in Will-County, Illinois (XGBoost, ~Confirmed) — first a spouse (b.~1869), then head of a 3-person household.
Age 71
b. ~1869
Female
Spouse
Born: Illinois
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Will-County, Illinois |
| Surname | DeLaney |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 71 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Joliet |
| 1935 Residence (County) | Will |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | No 5 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Joliet |
| Est. Birth Year | ~1869 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Theresa Delaney | Daughter | — | 40 | ~1900 |
| Mary Delaney | Spouse | — | 71 | ~1869 |
| William Delaney | Head | — | 73 | ~1867 |
Census Appearances
1920
Will, Illinois
Spouse, age 51
Will, Illinois · implied b. ~1869 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Delaney |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 51 |
| Marital Status | Married |
| Birthplace | Illinois |
| Father's Birthplace | Ireland |
| Mother's Birthplace | New York |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Will, Illinois
Spouse, age 62
Will, Illinois · implied b. ~1868 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Delaney |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 62 |
| Marital Status | Married |
| Birthplace | Illinois |
| Age at First Marriage | 24 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | New York |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Will-County, Illinois
Spouse, age 71
Will-County, Illinois · implied b. ~1869 — 3 household members
| Surname | DeLaney |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 71 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Joliet |
| 1935 Residence (County) | Will |
| Income (1939) | 0 |
| Highest Grade | No 5 |
| 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 Delaney across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Mary Delaney
Spouse · 1940 · age 71 · b. ~1869 · 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 — Will-County, Illinois
Open full size
1940 US Federal Census — Will-County, Illinois
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-00908-00204)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Donald Garing | 15 | Brother | — | Missouri |
| 2 | Edgar Parsons | 29 | Head | Radio Salesman | Minnesota |
| 3 | Margaret Parsons | 23 | Wife | — | Minnesota |
| 4 | Albert Verick | 22 | Head | Operator | Wisconsin |
| 5 | Mary Lou Verick | 21 | Wife | — | Illinois |
| 6 | Florence Riddicamb | 60 | Head | Teacher | Illinois |
| 7 | Edmund Riddicamb | 25 | Son | Teacher | Illinois |
| 8 | Wilbur A. Carpenter | 79 | Father | — | New York |
| 9 | Louis M. Ruben | 60 | Head | Broker | Illinois |
| 10 | Betty Ruben | 58 | Wife | — | Illinois |
| 11 | James Heggie | 36 | Head | — | Scotland |
| 12 | John Heggie | 6 | Son | — | Illinois |
| 13 | Thomas M. Meldon | 27 | Son in law | Boiler Business | Canada |
| 14 | Rose Tremelling | 53 | Housekeeper | Housekeeper | Illinois |
| 15 | Roy Shareffler | 48 | Head | Truck Driver | Illinois |
| 16 | Ann Shareffler | 49 | Wife | — | Illinois |
| 17 | Bertha Shareffler | 77 | Mother | — | Illinois |
| 18 | Eva Snyder | 38 | Head | Broker | Michigan |
| 19 | Urina Snyder | 82 | Mother | — | Ohio |
| 20 | Olive Peck | 39 | Lodger | Teacher | Wisconsin |
| 21 | James Peck | 15 | Lodger's Wife | — | Wisconsin |
| 22 | William H. Delaney | 73 | Head | — | Illinois |
| 23 | Mary Delaney THIS PERSON | 71 | Wife | — | Illinois |
| 24 | Theresa Delaney | 40 | Daughter | Saleslady | Illinois |
| 25 | Joseph Delaney | 38 | Head | Salesman | Illinois |
| 26 | Florence Delaney | 42 | Wife | — | Illinois |
| 27 | Conrad Hoffman | 69 | Head | — | Germany |
| 28 | Donald Troxell | 36 | Son in law | Bartender | Illinois |
| 29 | Mable Troxell | 37 | Wife | — | Illinois |
| 30 | Earl Olson | 18 | Neice | — | Illinois |
| 31 | Harvey Colgrove | 29 | Cousin | Bartender | Illinois |
| 32 | Harold A. Johnston | 45 | Head | Machinist | Michigan |
| 33 | Frieda Johnston | 45 | Wife | — | Illinois |
| 34 | Louis J. Jacques | 39 | Head | Barber | Illinois |
| 35 | Margaret Jacques | 38 | Wife | — | Illinois |
| 36 | Bevery Jacques | 15 | Daughter | — | Illinois |
| 37 | William Jacques | 11 | Son | — | Illinois |
| 38 | William Jordan | 64 | Head | Foreman | Canada |
| 39 | Rose Jordan | 57 | Wife | — | Indiana |
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)