MD
Mary Donovan — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Mary Donovan across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a head (b.~1866), then head of a 2-person household.
Age 74
b. ~1866
Female
Head
Born: Ireland
Widowed
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Donovan |
| Given Name | Mary |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 74 |
| Marital Status | Widowed |
| Birthplace | Ireland |
| 1935 Residence (City) | Chicago city |
| 1935 Residence (County) | Cook |
| Naturalization Status | Naturalized |
| Additional Details | |
| Highest Grade | No 8 |
| 1935 Residence | Same house |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
| Township / Ward | Chicago City |
| Est. Birth Year | ~1866 |
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.
2 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Donovan | Head | — | 74 | ~1866 |
| George Donovan | Son | — | 39 | ~1901 |
Census Appearances
1920
Cook, Illinois
Head, age 50
Cook, Illinois · implied b. ~1870 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Donovan |
| Given Name | Mary |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 50 |
| Marital Status | Widowed |
| Birthplace | Ireland |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Home Owned/Rented | 1892 |
| Birth Country | Ireland |
| Year of Naturalization | 1884 |
| Birthplace (normalized) | ireland |
1930
Cook, Illinois
Other, age 59
Cook, Illinois · implied b. ~1871 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Donovan |
| Given Name | Maria |
| Relationship to Head | Roomer |
| Sex | F |
| Color / Race | White |
| Age | 59 |
| Marital Status | Widowed |
| Birthplace | Ireland |
| Naturalization Status | Naturalized |
| Year of Immigration | 1885 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1940
Cook-County, Illinois
Head, age 74
Cook-County, Illinois · implied b. ~1866 — 2 household members
| Surname | Donovan |
| Given Name | Mary |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 74 |
| Marital Status | Widowed |
| Birthplace | Ireland |
| 1935 Residence (City) | Chicago city |
| 1935 Residence (County) | Cook |
| Naturalization Status | Naturalized |
| Highest Grade | No 8 |
| 1935 Residence | Same house |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
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 Donovan across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Donovan
Head · 1940 · age 74 · b. ~1866 · Illinois
★ You are viewing this record
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-t0627-00984-00392)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Albert E Bellezza | 40 | Mother-in-law | Machine Operator | Illinois |
| 2 | Bertha Fink | 55 | Head | — | Austria |
| 3 | John E Fink | 29 | Son | Title Hand | New York |
| 4 | Mary Fink | 27 | Daughter | Clerical Work | New York |
| 5 | Lillian Fink | 22 | Daughter | Cook | Illinois |
| 6 | Frank Costello | 47 | Head | Laborer | Italy |
| 7 | Mary Costello | 47 | Wife | — | Italy |
| 8 | Mary Q Costello | 16 | Daughter | — | Illinois |
| 9 | Theresa Costello | 8 | Daughter | — | Illinois |
| 10 | Mary Fiore | 43 | Head | Helper On A Truck | Italy |
| 11 | Mary Fiore | 43 | Wife | Finisher | Italy |
| 12 | Michael Pudisialy|Pudisialy | 32 | Head | Deliveryman | Illinois |
| 13 | Mary Pudisialy|Pudisialy | 28 | Wife | — | Minnesota |
| 14 | Nicholas Pudisialy|Pudisialy | 9 | Son | — | Illinois |
| 15 | Alfred Pudisialy|Pudisialy | 6 | Son | — | Illinois |
| 16 | Carol A Pudisialy|Pudisialy | 1 | Daughter | — | Illinois |
| 17 | Quinto Bianchi | 53 | Head | Foreman | Italy |
| 18 | Antoinette Bianchi | 27 | Daughter | Packer | Minnesota |
| 19 | Catherine Bianchi | 19 | Daughter | Salesgirl | Minnesota |
| 20 | Ida Bianchi | 17 | Daughter | — | Illinois |
| 21 | Torrine Boyland | 77 | Head | — | Indiana |
| 22 | Peter J Lardas | 57 | Head | Cook | Italy |
| 23 | Martha G Lardas | 51 | Wife | — | Italy |
| 24 | Lucia Lontro | 82 | Mother-in-law | — | Italy |
| 25 | Mary Donovan THIS PERSON | 74 | Head | — | Ireland |
| 26 | George Donovan | 39 | Son | Asbestos Worker | Illinois |
| 27 | Louis Manning | 50 | Head | Cabinet Maker | Indiana |
| 28 | Frances Manning | 49 | Wife | — | Illinois |
| 29 | Louis Manning | 27 | Son | Cabinet Maker | Illinois |
| 30 | Dolores Manning | 18 | Daughter | — | Illinois |
| 31 | Paul Hall | 33 | Son-in-law | Trucking | Illinois |
| 32 | Lillian Hall | 30 | Daughter | Stager | Illinois |
| 33 | Paul Hall | 7 | Grandson | — | Illinois |
| 34 | Patricia Hall | 5 | Granddaughter | — | Illinois |
| 35 | Le Roy La Rue | 30 | Head | Musical Instrument Maker | Illinois |
| 36 | Patricia La Rue | 29 | Wife | — | Illinois |
| 37 | Marlene La Rue | 7 | Daughter | — | Illinois |
| 38 | Virginia La Rue | 4 | Daughter | — | Illinois |
| 39 | Charles Lissner | 47 | Head | Comptometer Operator | Pennsylvania |
| 40 | Rose Lissner | 45 | Wife | — | 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)