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John Donovan — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this John Donovan across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a head (b.~1879), then head of a 4-person household.
Age 61
b. ~1879
Male
Head
Born: Ireland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Donovan |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 61 |
| Marital Status | Married |
| Birthplace | Ireland |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Naturalization Status | Naturalized |
| Additional Details | |
| Occupation | Street Car Man |
| Industry | Surf. Lines |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 2200 |
| Highest Grade | 8 |
| 1935 Residence | Same place |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
| Occupation | Street Car Man |
| Township / Ward | Chicago |
| Est. Birth Year | ~1879 |
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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Marcella Donovan | Daughter | — | 21 | ~1919 |
| John Donovan | Head | — | 61 | ~1879 |
| Edward Donovan | Son | — | 26 | ~1914 |
| Catherine Donovan | Spouse | — | 55 | ~1885 |
Census Appearances
1920
Cook, Illinois
Head, age 42
Cook, Illinois · implied b. ~1878 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Donovan |
| Given Name | John |
| Relationship to Head | head |
| Sex | M |
| Color / Race | White |
| Age | 42 |
| Marital Status | Married |
| Birthplace | Ireland |
| Year of Immigration | 1898 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Steam Fitter |
| Industry | Shop |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Irish |
| Home Owned/Rented | R |
| Birth Country | Ireland |
| Year of Naturalization | 1903 |
| Birthplace (normalized) | ireland |
1930
Cook, Illinois
Head, age 52
Cook, Illinois · implied b. ~1878 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Donovan |
| Given Name | John Jr. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 52 |
| Marital Status | Married |
| Birthplace | Ireland |
| Naturalization Status | Naturalized |
| Year of Immigration | 1899 |
| Age at First Marriage | 29 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Steam Fitter |
| Industry | Soap Factory |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | Irish |
| Home Owned/Rented | R |
| Home Value / Rent | 27 |
| Radio Set | R |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1940
Cook-County, Illinois
Head, age 61
Cook-County, Illinois · implied b. ~1879 — 4 household members
| Surname | Donovan |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 61 |
| Marital Status | Married |
| Birthplace | Ireland |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Naturalization Status | Naturalized |
| Occupation | Street Car Man |
| Industry | Surf. Lines |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 2200 |
| Highest Grade | 8 |
| 1935 Residence | Same place |
| 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 John Donovan across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
John Donovan
Head · 1940 · age 61 · b. ~1879 · 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-t0627-00938-00527)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | John Van Reynen | 33 | Head | Bakery Driver | Holland |
| 42 | Elenore Van Reynen | 31 | Wife | — | Denmark |
| 43 | Joan Van Reynen | 6 | Daughter | — | Illinois |
| 44 | Anthony Clemen | 45 | Head | Tax Specialty | Illinois |
| 45 | Selma Clemen | 41 | Wife | Saleslady | Illinois |
| 46 | Richard Clemen | 13 | Son | — | Illinois |
| 47 | Richard Tripp | 52 | Head | Chauf Truck | Missouri |
| 48 | Helen Tripp | 41 | Wife | — | Illinois |
| 49 | Extra Line Misinformed | None | — | — | — |
| 50 | Richard H. Jay | 33 | Head | Traffic Supt. | Indiana |
| 51 | Frances Jay | 30 | Wife | — | Indiana |
| 52 | Norman Jay | 6 | Son | — | Illinois |
| 53 | John Otis Jay | 3 | Son | — | Illinois |
| 54 | Fred M. O'Brien | 60 | Head | Maintenance Man | Illinois |
| 55 | Trella O'Brien | 58 | Wife | — | Illinois |
| 56 | Fredric O'Brien | 29 | Son | Salesman | Illinois |
| 57 | Mildred O'Brien | 27 | Daughter-in-law | Switchbd. Oper. | Illinois |
| 58 | Ralph Burgess | 57 | Head | Mfg. Chemist | Illinois |
| 59 | Bertha Burgess | 59 | Wife | — | Illinois |
| 60 | Edward Healy | 41 | Head | Policeman | Illinois |
| 61 | Marie Healy | 36 | Wife | — | Illinois |
| 62 | Charles Fresco | 30 | Head | Truck Driver | Illinois |
| 63 | Marie Fresco | 26 | Wife | — | Illinois |
| 64 | Charles Jr. Fresco | 2 | Son | — | Illinois |
| 65 | Roland W. Gustafson | 37 | Head | Cashier | Illinois |
| 66 | La Verne Gustafson | 38 | Wife | Stenographer | Illinois |
| 67 | Harry A. Klein | 48 | Head | Supervisor | Wisconsin |
| 68 | Minnie Klein | 45 | Wife | — | Illinois |
| 69 | Edward Egan | 38 | Head | Detective | Illinois |
| 70 | Margaret Egan | 34 | Wife | — | Illinois |
| 71 | Donald Egan | 5 | Son | — | Illinois |
| 72 | Edward Egan | 1 | Son | — | Illinois |
| 73 | Ralph Elmstrom | 36 | Head | Clerical | Illinois |
| 74 | Edna Elmstrom | 39 | Wife | — | Illinois |
| 75 | Alan Elmstrom | 4 | Son | — | Illinois |
| 76 | Gary Elmstrom | 2 | Son | — | Illinois |
| 77 | John Donovan THIS PERSON | 61 | Head | Street Car Man | Ireland |
| 78 | Catherine Donovan | 55 | Wife | — | Ireland |
| 79 | Edward Donovan | 26 | Son | Street Car Man | Illinois |
| 80 | Marcella Donovan | 21 | Daughter | New Worker | 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)