JD
John Donovan — 1920 US Census Record
Linked across censuses1920 United States Federal Census · Cook, Illinois
Our Model Tree links this John Donovan across the 1920, 1930 and 1940 US Censuses in Cook, Illinois (XGBoost, ~Confirmed) — first a head (b.~1896), then head of a 4-person household.
Age 24
b. ~1896
Male
Head
Born: Illinois
Married
1920 Census Record Details
| Census Year | 1920 |
| Location | Cook, Illinois |
| Surname | Donovan |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 24 |
| Marital Status | Married |
| Birthplace | Illinois |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Additional Details | |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Home Owned/Rented | R |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Est. Birth Year | ~1896 |
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 1920 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Mary Donovan | Daughter | — | ~1920 | |
| John Donovan | Head | — | 24 | ~1896 |
| John Donovan | Son | — | 1 | ~1919 |
| Mary Donovan | Spouse | — | 24 | ~1896 |
Census Appearances
1920
Cook, Illinois
Head, age 24
Cook, Illinois · implied b. ~1896 — 4 household members
| Surname | Donovan |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 24 |
| Marital Status | Married |
| Birthplace | Illinois |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Home Owned/Rented | R |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Cook, Illinois
Head, age 34
Cook, Illinois · implied b. ~1896 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Donovan |
| Given Name | Joe |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 34 |
| Marital Status | Married |
| Birthplace | Illinois |
| Age at First Marriage | 30 |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Wisconsin |
| Occupation | Salesman |
| Industry | Paper Mfg Co |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 85.00 |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Other, age 44
Cook-County, Illinois · implied b. ~1896 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Donavan |
| Given Name | John |
| Relationship to Head | Boarder |
| Sex | M |
| Color / Race | White |
| Age | 44 |
| Marital Status | Divorced |
| Birthplace | Illinois |
| 1935 Residence (City) | City of Chicago |
| 1935 Residence (County) | Cook |
| Occupation | Time Keeper |
| Industry | District Office |
| Class of Worker | GW |
| Hours Worked | 188 |
| Income (1939) | 1000 |
| Highest Grade | 8 |
| 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 John Donovan across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Donovan
Head · 1920 · age 24 · b. ~1896 · Illinois
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1920 US Federal Census — Cook, Illinois
Open full size
1920 US Federal Census — Cook, Illinois
Page Contents
50 people indexed on this census page (ia:1920:14thcensusofpopu339unit:0227)
| Line | Name | Age | Relation | Birthplace |
|---|---|---|---|---|
| 51 | C. Cooper | 21 | Head | England |
| 52 | Mary Cooper | 21 | Wife | England |
| 53 | C. Cooper | 1 | Son | Illinois |
| 54 | Theodore Cooper | 0 | Son | Illinois |
| 55 | John Nolan | 24 | Head | Ireland |
| 56 | Nellie Nolan | 24 | Wife | Ireland |
| 57 | John Nolan | 4 | Son | Illinois |
| 58 | Mary Nolan | 3 | Daughter | Illinois |
| 59 | Nellie Nolan | 2 | Daughter | Illinois |
| 60 | James Nolan | 0 | Son | Illinois |
| 61 | Jack Nolan | 21 | Brother | Ireland |
| 62 | A. J. Nolan | 45 | Brother | Ireland |
| 63 | George Kratz | 24 | Head | Illinois |
| 64 | Mary Kratz | 24 | Wife | Illinois |
| 65 | George Kratz | 1 | Son | Illinois |
| 66 | John Donovan THIS PERSON | 24 | Head | Illinois |
| 67 | Mary Donovan | 24 | Wife | Illinois |
| 68 | John Donovan | 1 | Son | Illinois |
| 69 | Mary Donovan | 0 | Daughter | Illinois |
| 70 | John Smith | 24 | Head | Illinois |
| 71 | Mary Smith | 24 | Wife | Illinois |
| 72 | John Smith | 1 | Son | Illinois |
| 73 | John Murphy | 24 | Head | Illinois |
| 74 | Mary Murphy | 24 | Wife | Illinois |
| 75 | John Murphy | 1 | Son | Illinois |
| 76 | John Jones | 24 | Head | Illinois |
| 77 | Mary Jones | 24 | Wife | Illinois |
| 78 | John Jones | 1 | Son | Illinois |
| 79 | Mary Jones | 0 | Daughter | Illinois |
| 80 | John Jones | 21 | Brother | Illinois |
| 81 | Mary Jones | 21 | Sister | Illinois |
| 82 | John Jones | 21 | Brother | Illinois |
| 83 | Mary Jones | 21 | Sister | Illinois |
| 84 | John Jones | 21 | Brother | Illinois |
| 85 | John Kelly | 24 | Head | Illinois |
| 86 | Mary Kelly | 24 | Wife | Illinois |
| 87 | John Kelly | 1 | Son | Illinois |
| 88 | John Goodrich | 24 | Head | Illinois |
| 89 | Mary Goodrich | 24 | Wife | Illinois |
| 90 | John Goodrich | 1 | Son | Illinois |
| 91 | John Smith | 24 | Head | Illinois |
| 92 | Mary Smith | 24 | Wife | Illinois |
| 93 | John Smith | 1 | Son | Illinois |
| 94 | Mary Smith | 0 | Daughter | Illinois |
| 95 | John Smith | 21 | Brother | Illinois |
| 96 | Mary Smith | 21 | Sister | Illinois |
| 97 | John Smith | 21 | Brother | Illinois |
| 98 | Mary Smith | 21 | Sister | Illinois |
| 99 | Gustavus Benson | 58 | Head | Sweden |
| 100 | Christina Benson | 57 | Wife | Sweden |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1920 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)