JD
John Donovan — 1940 US Census Record
Model Tree available1940 United States Federal Census · Freeborn-County, Minnesota
Our Model Tree links this John Donovan across the 1920, 1930 and 1940 US Censuses in Freeborn-County, Minnesota (XGBoost, ~Confirmed), with identified parents Thomas & Thomas — first a son (b.~1917), then head of a 6-person household.
Age 23
b. ~1917
Male
Son
Born: Minnesota
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Freeborn-County, Minnesota |
| Surname | Donovan |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Minnesota |
| 1935 Residence (City) | Hartland |
| 1935 Residence (County) | Freeborn |
| Additional Details | |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | OA |
| Hours Worked | 40 |
| Income (1939) | 0 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
| Occupation | Farmer |
| Township / Ward | Hartland |
| Est. Birth Year | ~1917 |
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 John | Age | Birth yr |
|---|---|---|---|---|
| Thomas Donovan | Head | — | 51 | ~1889 |
| Carl Mickelson | Other | — | 32 | ~1908 |
| Joseph Mickelson | Son | — | 17 | ~1923 |
| John Donovan | Son | — | 23 | ~1917 |
| Thomas Mickelson | Son | — | 13 | ~1927 |
| Francis Mickelson | Spouse | — | 29 | ~1911 |
Census Appearances
1920
Freeborn, Minnesota
Son, age 3
Freeborn, Minnesota · implied b. ~1917 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Donovan |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | Minnesota |
| Father's Birthplace | Minnesota |
| Mother's Birthplace | Minnesota |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
1930
Freeborn, Minnesota
Son, age 13
Freeborn, Minnesota · implied b. ~1917 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Donovan |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Minnesota |
| Father's Birthplace | Minnesota |
| Mother's Birthplace | Minnesota |
| Can Read/Write | Yes |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
1940
Freeborn-County, Minnesota
Son, age 23
Freeborn-County, Minnesota · implied b. ~1917 — 6 household members
| Surname | Donovan |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Minnesota |
| 1935 Residence (City) | Hartland |
| 1935 Residence (County) | Freeborn |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | OA |
| Hours Worked | 40 |
| Income (1939) | 0 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
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: father Thomas Donovan (~0.92 confidence) and father Thomas Donovan (~0.92 confidence) and mother Mary Donovan (~0.92 confidence) and father Thomas Donovan (~0.92 confidence) and mother Francis Mickelson (~0.60 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.86
Father
Thomas Donovan
b. ~1873
Source father
● Household
· direct · ~0.92
Father
Thomas Donovan
b. ~1878
Source father
● Household
· direct · ~0.92
Mother
Mary Donovan
b. ~1882
Source mother
● Household
· direct · ~0.92
Father
Thomas Donovan
b. ~1889
Source father
● Household
· direct · ~0.92
Mother
Francis Mickelson
b. ~1911
Source mother
● Household
· direct · ~0.6
This person
Anchor record
John Donovan
Son · 1940 · age 23 · b. ~1917 · Minnesota
★ You are viewing this record
Sibling
Thomas Mickelson
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joseph Mickelson
Sibling · 1940 · age 17
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 — Freeborn-County, Minnesota
Open full size
1940 US Federal Census — Freeborn-County, Minnesota
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01922-00686)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Rudolph Olson | 73 | Head | Farmer | Minnesota |
| 42 | Anna Olson | 70 | Wife | — | Minnesota |
| 43 | Clara Hauto | 41 | Lodger | Housekeeper | Minnesota |
| 44 | Tilford Knutson | 34 | Head | Farmer | Minnesota |
| 45 | Turena Knutson | 67 | Mother | — | Minnesota |
| 46 | Norman Olson | 30 | Lodger | Farm Labor | Minnesota |
| 47 | Carl Ulrich | 55 | Head | Farmer | Iowa |
| 48 | Martha Ulrich | 55 | Wife | — | Germany |
| 49 | Leroy Marlin | 37 | Head | Farmer | Illinois |
| 50 | Maggie Marlin | 34 | Wife | — | Iowa |
| 51 | William Marlin | 10 | Son | Farm Boy | Iowa |
| 52 | Robert Marlin | 4 | Son | — | Minnesota |
| 53 | Peter Erickson | 74 | Head | Farmer | Minnesota |
| 54 | Gladys Erickson | 64 | Wife | — | Minnesota |
| 55 | Gordon Erickson | 5 | Daughter | — | Minnesota |
| 56 | Corrine Erickson | 2 | Daughter | — | Minnesota |
| 57 | Edgar Pederson | 41 | Head | Farmer | Minnesota |
| 58 | Esther Pederson | 32 | Wife | — | Minnesota |
| 59 | Donald Pederson | 3 | Son | — | Minnesota |
| 60 | Ordis Pederson | 1 | Son | — | Minnesota |
| 61 | Thomas Donovan | 51 | Head | — | Minnesota |
| 62 | John Donovan THIS PERSON | 23 | Son | Farmer | Minnesota |
| 63 | Carl Mickelson | 32 | Lodger | Carpenter | Minnesota |
| 64 | Francis Mickelson | 29 | Wife | — | Minnesota |
| 65 | Joseph Mickelson | 17 | Son | — | Minnesota |
| 66 | Thomas Mickelson | 13 | Son | — | Minnesota |
| 67 | Ole Morstad | 46 | Head | Farmer | Minnesota |
| 68 | Alma Morstad | 43 | Wife | — | Iowa |
| 69 | Arvid Morstad | 18 | Son | Farm Labor | Minnesota |
| 70 | Arlene Morstad | 16 | Daughter | — | Minnesota |
| 71 | Dennis Morstad | 8 | Daughter | — | Minnesota |
| 72 | Nels Hatle | 60 | Head | Farmer | Minnesota |
| 73 | Ellsworth Hatle | 24 | Son | Farm Labor | Minnesota |
| 74 | Roger Wilbert Hatle | 20 | Lodger | Farm Labor | Minnesota |
| 75 | Ruby Hatle | 20 | Lodger | — | Minnesota |
| 76 | Bernice Hatle | 18 | Daughter | — | Minnesota |
| 77 | Julian Foss | 62 | Head | Farmer | Minnesota |
| 78 | Clara Foss | 50 | Wife | — | Minnesota |
| 79 | Esten Foss | 24 | Son | Farm Labor | Minnesota |
| 80 | Jewell Foss | 19 | Daughter | Farm Labor | Minnesota |
Pedigree Summary
John + 2 siblings
Gen 1 · 5 parents
~0.86
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)