JD
John Donovan — 1940 US Census Record
Model Tree available1940 United States Federal Census · Montgomery-County, Ohio
Our Model Tree links this John Donovan across the 1920, 1930 and 1940 US Censuses in Montgomery-County, Ohio (XGBoost, ~Confirmed), with identified parents William & William — first a son (b.~1915), then head of a 5-person household.
Age 25
b. ~1915
Male
Son
Born: Ohio
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Montgomery-County, Ohio |
| Surname | Donovan |
| Given Name | John M |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Ohio |
| 1935 Residence (City) | Dayton |
| 1935 Residence (County) | Montgomery |
| Additional Details | |
| Occupation | Meter Reader |
| Industry | City Water |
| Class of Worker | GW |
| Hours Worked | 45 |
| Income (1939) | 1050 |
| Highest Grade | H-4 |
| 1935 Residence | Same place |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
| Occupation | Meter Reader |
| Township / Ward | Dayton |
| Est. Birth Year | ~1915 |
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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Maryetta Donovan | Daughter | — | 24 | ~1916 |
| Julia Donovan | Head | — | 54 | ~1886 |
| Charles Donovan | Son | — | 17 | ~1923 |
| John Donovan | Son | — | 25 | ~1915 |
| James Donovan | Son | — | 27 | ~1913 |
Census Appearances
1920
Montgomery, Ohio
Son, age 5
Montgomery, Ohio · implied b. ~1915 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Donovan |
| Given Name | John M |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | Ohio |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Ireland |
| Speaks English | Yes |
| Mother Tongue | English |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
1930
Montgomery, Ohio
Son, age 15
Montgomery, Ohio · implied b. ~1915 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Donovan |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Ohio |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Ireland |
| Can Read/Write | Yes |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
1940
Montgomery-County, Ohio
Son, age 25
Montgomery-County, Ohio · implied b. ~1915 — 5 household members
| Surname | Donovan |
| Given Name | John M |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Ohio |
| 1935 Residence (City) | Dayton |
| 1935 Residence (County) | Montgomery |
| Occupation | Meter Reader |
| Industry | City Water |
| Class of Worker | GW |
| Hours Worked | 45 |
| Income (1939) | 1050 |
| Highest Grade | H-4 |
| 1935 Residence | Same place |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
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 William Donovan (~0.92 confidence) and father William Donovan (~0.92 confidence) and mother Julia Donovan (~0.92 confidence) and mother Julia Donovan (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
William Donovan
b. ~1880
Source father
● Household
· direct · ~0.92
Father
William Donovan
b. ~1880
Source father
● Household
· direct · ~0.92
Mother
Julia Donovan
b. ~1881
Source mother
● Household
· direct · ~0.92
Mother
Julia Donovan
b. ~1886
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Donovan
Son · 1940 · age 25 · b. ~1915 · Ohio
★ You are viewing this record
Sibling
Charles Donovan
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Donovan
Sibling · 1940 · age 27
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Maryetta Donovan
Sibling · 1940 · age 24
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 — Montgomery-County, Ohio
Open full size
1940 US Federal Census — Montgomery-County, Ohio
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03256-00767)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Thomas O'Neil | 34 | Head | Traffic Clerk | Ohio |
| 2 | Lula M Lewis | 45 | Head | Cook | Indiana |
| 3 | Lloyd Metzger | 24 | Head | Mill Hand | Ohio |
| 4 | Grace Metzger | 23 | Wife | — | Ohio |
| 5 | Janet Metzger | 1 | Daughter | — | Ohio |
| 6 | Kenneth Blackley | 16 | Lodger | — | Ohio |
| 7 | Edward Kamritz | 68 | Head | New Maker | Ohio |
| 8 | Bertha Kamritz | 58 | Wife | — | Pennsylvania |
| 9 | Paul Miller | 36 | Head | Manager | Ohio |
| 10 | Hilda Miller | 36 | Wife | Assistant | Ohio |
| 11 | Albert Rehkemper | 54 | Head | Office Manager | Ohio |
| 12 | Helen Rehkemper | 50 | Wife | — | Ohio |
| 13 | Cecile Rehkemper | 20 | Daughter | Librarian | Ohio |
| 14 | Cathrine Sitel | 75 | Mother-in-law | — | Ohio |
| 15 | Emil Krumholtz | 71 | Head | — | Germany |
| 16 | Elizabeth Krumholtz | 45 | Daughter | Teacher (Sub) | New York |
| 17 | Carl Key | 47 | Head | Truck Driver | Ohio |
| 18 | Charles Free | 28 | Head | Punch Press | Ohio |
| 19 | Louise Free | 24 | Wife | — | Ohio |
| 20 | Charles Free | 5 | Son | — | Ohio |
| 21 | Fred Barnett | 34 | Head | Teacher | Ohio |
| 22 | Alice Barnett | 24 | Wife | — | Ohio |
| 23 | Jacob Fowler | 59 | Head | Labor | Ohio |
| 24 | Mary Fowler | 55 | Wife | — | Ohio |
| 25 | Julia Donovan | 54 | Head | — | New York |
| 26 | James E Donovan | 27 | Son | Insulation | Ohio |
| 27 | John M Donovan THIS PERSON | 25 | Son | Meter Reader | Ohio |
| 28 | Maryetta Donovan | 24 | Daughter | Stenographer | Ohio |
| 29 | Charles Donovan | 17 | Son | — | Ohio |
| 30 | Paul Schotney | 31 | Head | Retail Salesman | Ohio |
| 31 | Eleanore Schotney | 29 | Wife | — | Ohio |
| 32 | Patricia Schotney | 6 | Daughter | — | Ohio |
| 33 | Paul Schotney | 4 | Son | — | Ohio |
| 34 | Thomas Schotney | 3 | Son | — | Ohio |
| 35 | Irvin Miltenberger | 43 | Head | Paper Handler | Ohio |
| 36 | Stella Miltenberger | 38 | Wife | — | Indiana |
| 37 | Edward Miltenberger | 17 | Son | — | Ohio |
| 38 | Doris Miltenberger | 12 | Daughter | — | Ohio |
| 39 | Louise Miltenberger | 10 | Daughter | — | Ohio |
| 40 | Earl Hare | 61 | Head | Tools Maker | Ohio |
Related Census Records
Pedigree Summary
John + 3 siblings
Gen 1 · 4 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)