JD
John Donovan — 1940 US Census Record
Model Tree available1940 United States Federal Census · Sangamon-County, Illinois
Our Model Tree links this John Donovan across the 1920, 1930 and 1940 US Censuses in Sangamon-County, Illinois (XGBoost, ~Confirmed), with identified parents Mary & John — first a son (b.~1916), then head of a 4-person household.
Age 24
b. ~1916
Male
Son
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Sangamon-County, Illinois |
| Surname | Donovan |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Talkington Twp |
| 1935 Residence (County) | Sangamon |
| Additional Details | |
| Class of Worker | NP |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same House |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Talkington Twp |
| Est. Birth Year | ~1916 |
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 |
|---|---|---|---|---|
| John Donovan | Head | — | 49 | ~1891 |
| Morris Donovan | Son | — | 20 | ~1920 |
| John Donovan | Son | — | 24 | ~1916 |
| Elizabeth Donovan | Spouse | — | 49 | ~1891 |
Census Appearances
1920
Sangamon, Illinois
Son, age 4
Sangamon, Illinois · implied b. ~1916 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Donovan |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Sangamon, Illinois
Son, age 15
Sangamon, Illinois · implied b. ~1915 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Donovan |
| Given Name | John Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Sangamon-County, Illinois
Son, age 24
Sangamon-County, Illinois · implied b. ~1916 — 4 household members
| Surname | Donovan |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Talkington Twp |
| 1935 Residence (County) | Sangamon |
| Class of Worker | NP |
| 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 John Donovan across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Mary Donovan (~0.92 confidence) and father John Donovan (~0.92 confidence) and mother Mary Donovan (~0.92 confidence) and mother Elizabeth Donovan (~0.92 confidence) and father John Donovan (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Mary Donovan
b. ~1882
Source mother
● Household
· direct · ~0.92
Father
John Donovan
b. ~1884
Source father
● Household
· direct · ~0.92
Mother
Mary Donovan
b. ~1885
Source mother
● Household
· direct · ~0.92
Mother
Elizabeth Donovan
b. ~1891
Source mother
● Household
· direct · ~0.92
Father
John Donovan
b. ~1891
Source father
● Household
· direct · ~0.92
This person
Anchor record
John Donovan
Son · 1940 · age 24 · b. ~1916 · Illinois
★ You are viewing this record
Sibling
Morris Donovan
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Sangamon-County, Illinois
Open full size
1940 US Federal Census — Sangamon-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00887-00836)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Chas. D Dewitt | 48 | Head | Farming | Illinois |
| 42 | Carrie Dewitt | 45 | Wife | — | Illinois |
| 43 | Warren Dewitt | 9 | Son | — | Illinois |
| 44 | George D Murphy | 49 | Head | Farming | Illinois |
| 45 | Marie Murphy | 40 | Wife | — | Illinois |
| 46 | George Murphy | 13 | Son | — | Illinois |
| 47 | Katherine Murphy | 9 | Daughter | — | Illinois |
| 48 | Robert Murphy | 7 | Son | — | Illinois |
| 49 | Agnes Murphy | 6 | Daughter | — | Illinois |
| 50 | Helen Murphy | 3 | Daughter | — | Illinois |
| 51 | Bernard Murphy | 2 | Son | — | Illinois |
| 52 | Imelda Murphy | 0 | Daughter | — | Illinois |
| 53 | Henry D Langheim | 50 | Head | Farming | Illinois |
| 54 | Elizabeth Langheim | 45 | Wife | — | S. Dakota |
| 55 | Harold Langheim | 24 | Son | Farming | Illinois |
| 56 | Ernest Langheim | 22 | Son | Farming | Illinois |
| 57 | Arnold Langheim | 19 | Son | Apprentice | Canada |
| 58 | A. Elmer Langheim | 17 | Son | Farming | Canada |
| 59 | Paul Langheim | 14 | Son | New Worker | Illinois |
| 60 | Elbert Langheim | 13 | Son | — | Illinois |
| 61 | Frances Langheim | 10 | Son | — | Illinois |
| 62 | Normand Langheim | 9 | Son | — | Illinois |
| 63 | Bernard Langheim | 3 | Son | — | Illinois |
| 64 | John D Donovan | 49 | Head | Farming | Illinois |
| 65 | Elizabeth Donovan | 49 | Wife | — | Illinois |
| 66 | John Donovan THIS PERSON | 24 | Son | — | Illinois |
| 67 | Morris Donovan | 20 | Son | — | Illinois |
| 68 | John R D Burris | 60 | Head | Farming | Illinois |
| 69 | Mabel Burris | 56 | Wife | — | Illinois |
| 70 | Taylor Westley | 53 | Head | Farming | Illinois |
| 71 | Grace Westley | 49 | Wife | — | Illinois |
| 72 | Westley Westley | 21 | Son | Maintainer | Illinois |
| 73 | Wayne Westley | 19 | Son | Farming | Illinois |
| 74 | Norman Westley | 18 | Son | — | Illinois |
| 75 | Dorothy Westley | 16 | Daughter | New Worker | Illinois |
| 76 | Doris Westley | 16 | Daughter | New Worker | Illinois |
| 77 | Jerald Westley | 13 | Son | — | Illinois |
| 78 | Fred D Englemann | 67 | Head | Farming | Germany |
| 79 | Kathie Englemann | 60 | Wife | — | Ireland |
| 80 | Catherine Englemann | 20 | Son | — | Illinois |
Pedigree Summary
John + 1 sibling
Gen 1 · 5 parents
~0.92
Max depth 4 (1900–1950 window)
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)