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 spouse (b.~1880), then head of a 6-person household.
Age 60
b. ~1880
Female
Spouse
Born: Illinois
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Donovan |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 60 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same house |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Chicago City |
| Est. Birth Year | ~1880 |
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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Dorothy Donovan | Daughter | — | 19 | ~1921 |
| Daniel Donovan | Head | — | 63 | ~1877 |
| Walter Donovan | Son | — | 30 | ~1910 |
| Donald Donovan | Son | — | 28 | ~1912 |
| Gerard Donovan | Son | — | 21 | ~1919 |
| Mary Donovan | Spouse | — | 60 | ~1880 |
Census Appearances
1920
Cook, Illinois
Spouse, age 36
Cook, Illinois · implied b. ~1884 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Donovan |
| Given Name | Mary E |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 36 |
| Marital Status | Married |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Cook, Illinois
Spouse, age 46
Cook, Illinois · implied b. ~1884 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Donovan |
| Given Name | Mary E. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 46 |
| Marital Status | Married |
| Birthplace | Illinois |
| Age at First Marriage | 25 |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Spouse, age 60
Cook-County, Illinois · implied b. ~1880 — 6 household members
| Surname | Donovan |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 60 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Income (1939) | 0 |
| 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 Donovan across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Donovan
Spouse · 1940 · age 60 · b. ~1880 · 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-t0627-00978-00613)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Charles Donergan | 15 | Son | — | Iowa |
| 42 | Raymond Donergan | 13 | Son | — | Iowa |
| 43 | Donald Donergan | 12 | Son | — | Illinois |
| 44 | Delores Donergan | 9 | Daughter | — | Illinois |
| 45 | John D. Riley | 60 | Head | — | Indiana |
| 46 | William Krantz | 43 | Head | Switchman | Iowa |
| 47 | Elizabeth Lees | 68 | Head | — | Iowa |
| 48 | Lillie Helbruck | 29 | Head | — | Illinois |
| 49 | Verne Helbruck | 5 | Son | — | Illinois |
| 50 | Celia Marsh | 53 | Mother | Housekeeper | Illinois |
| 51 | William Haworth | 43 | Head | Meter Reader | Illinois |
| 52 | Jane Haworth | 36 | Wife | — | Illinois |
| 53 | William Haworth | 5 | Son | — | Illinois |
| 54 | Isaac Tarmara | 46 | Head | Foreman | Turkey |
| 55 | Fortune Tarmara | 42 | Wife | — | Turkey |
| 56 | Albert Tarmara | 21 | Son | Stockman | Illinois |
| 57 | Maurice Tarmara | 20 | Son | Shipping Clerk | Illinois |
| 58 | Frances Tarmara | 18 | Daughter | File Clerk | Illinois |
| 59 | Edward Tarmara | 13 | Son | — | Illinois |
| 60 | Jesse Ogden | 78 | Head | — | Iowa |
| 61 | Daniel Fitzgibbons | 43 | Head | General Foreman | Great Britain |
| 62 | Bridie Fitzgibbons | 33 | Wife | — | Great Britain |
| 63 | John Fitzgibbons | 10 | Son | — | Illinois |
| 64 | Daniel Fitzgibbons | 8 | Son | — | Illinois |
| 65 | Anastasia Fitzgibbons | 7 | Daughter | — | Illinois |
| 66 | Daniel Donovan | 63 | Head | Custodian | New York |
| 67 | Mary Donovan THIS PERSON | 60 | Wife | — | Illinois |
| 68 | Walter Donovan | 30 | Son | Attendant | Illinois |
| 69 | Donald Donovan | 28 | Son | Shipping Clerk | Illinois |
| 70 | Gerard Donovan | 21 | Son | Salesman | Illinois |
| 71 | Dorothy Donovan | 19 | Daughter | Binder Girl | Illinois |
| 72 | Clara Klare | 71 | Head | — | Indiana |
| 73 | Clara Mcguire | 35 | Daughter | New Worker | Illinois |
| 74 | Marie Klare | 44 | Daughter | Saleslady | Illinois |
| 75 | Mary Ann Mcguire | 9 | Granddaughter | — | Illinois |
| 76 | Herman Osterkamp | 53 | Head | Auto Mechanic | Illinois |
| 77 | Pearl Osterkamp | 46 | Wife | — | Illinois |
| 78 | Gerald Osterkamp | 19 | Son | — | Illinois |
| 79 | Clara Mcclory | 50 | Lodger | Housekeeper | Illinois |
| 80 | Sam Avignani | 25 | Head | Glazier | 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)