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John Donahue — 1940 US Census Record
Model Tree available1940 United States Federal Census · St.-Joseph-County, Indiana
Our Model Tree links this John Donahue across the 1920, 1930 and 1940 US Censuses in St.-Joseph-County, Indiana (XGBoost, ~Confirmed), with identified parents William & Margaret — first a son (b.~1916), then head of a 7-person household.
Age 24
b. ~1916
Male
Son
Born: Ohio
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | St.-Joseph-County, Indiana |
| Surname | Donahue |
| Given Name | John A. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | Ohio |
| 1935 Residence (City) | South Bend |
| 1935 Residence (County) | St. Joseph |
| Additional Details | |
| Occupation | Draftsman |
| Industry | Automobile Mfg. |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1060 |
| Highest Grade | C-2 |
| 1935 Residence | Same place |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
| Occupation | Draftsman |
| Township / Ward | South Bend |
| 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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Margaret Donahue | Daughter | — | 17 | ~1923 |
| Mary Donahue | Daughter | — | 19 | ~1921 |
| William Donahue | Head | — | 52 | ~1888 |
| Robert Donahue | Son | — | 14 | ~1926 |
| Charles Donahue | Son | — | 15 | ~1925 |
| John Donahue | Son | — | 24 | ~1916 |
| Margaret Donahue | Spouse | — | 48 | ~1892 |
Census Appearances
1920
St Joseph, …
Son, age 4
St Joseph, Indiana · implied b. ~1916 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Donahue |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | Ohio |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Ohio |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
1930
St Joseph, …
Son, age 14
St Joseph, Indiana · implied b. ~1916 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Donahue |
| Given Name | John A |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Ohio |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Ohio |
| Can Read/Write | Yes |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
1940
St.-Joseph-County, Indiana
Son, age 24
St.-Joseph-County, Indiana · implied b. ~1916 — 7 household members
| Surname | Donahue |
| Given Name | John A. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | Ohio |
| 1935 Residence (City) | South Bend |
| 1935 Residence (County) | St. Joseph |
| Occupation | Draftsman |
| Industry | Automobile Mfg. |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1060 |
| Highest Grade | C-2 |
| 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 Donahue across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father William Donahue (~0.92 confidence) and mother Margaret Donahue (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
William Donahue
b. ~1889
Source father
● Household
· direct · ~0.92
Mother
Margaret Donahue
b. ~1892
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Donahue
Son · 1940 · age 24 · b. ~1916 · Indiana
★ You are viewing this record
Sibling
Charles Donahue
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Donahue
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Donahue
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Donahue
Sibling · 1940 · age 19
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 — St.-Joseph-County, Indiana
Open full size
1940 US Federal Census — St.-Joseph-County, Indiana
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-01134-00869)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | William H. Donahue | 52 | Head | Owner | Ohio |
| 2 | Margaret S. Donahue | 48 | Wife | — | Ohio |
| 3 | John A. Donahue THIS PERSON | 24 | Son | Draftsman | Ohio |
| 4 | Mary L. Donahue | 19 | Daughter | Calculating Mach. Operator | Indiana |
| 5 | Margaret A. Donahue | 17 | Daughter | — | Indiana |
| 6 | Charles A. Donahue | 15 | Son | — | Indiana |
| 7 | Robert P. Donahue | 14 | Son | — | Indiana |
| 8 | Charles W. Thomas | 36 | Head | Core Maker | Indiana |
| 9 | Juanita Thomas | 36 | Wife | — | Indiana |
| 10 | Jack E. Gray | 8 | Nephew | — | Indiana |
| 11 | Clyde M. Carr | 52 | Head | Barber | Indiana |
| 12 | Etta V. Carr | 47 | Wife | — | Indiana |
| 13 | Martha J. Carr | 15 | Daughter | — | Indiana |
| 14 | Mary Ellen Carr | 11 | Daughter | — | Indiana |
| 15 | Glen Q. Grafton | 34 | Head | Meat Cutter | Indiana |
| 16 | Bertha M. Grafton | 25 | Wife | Sales Lady | Indiana |
| 17 | Lestel Jewel | 28 | Lodger | Attendant | Indiana |
| 18 | John R. Humphreys | 18 | Head | Machinist Apprent. | Ohio |
| 19 | Sterling Humphreys | 18 | Wife | — | Indiana |
| 20 | Charles L. Fortin | 70 | Head | Real Estate Agt. | Michigan |
| 21 | Mary Fortin | 67 | Wife | — | Michigan |
| 22 | Ira G. Barnhart | 52 | Lodger | Assembler | Illinois |
| 23 | Robert W. Johnson | 45 | Lodger | Accountant | Illinois |
| 24 | Emanuel Klein | 41 | Head | Pantryman | Hungary |
| 25 | Irene Klein | 42 | Wife | — | Hungary |
| 26 | Madelyn Klein | 16 | Daughter | — | Ohio |
| 27 | Daniel C. Sutherland | 47 | Head | Salesman | Ohio |
| 28 | Emogene Sutherland | 47 | Wife | — | Illinois |
| 29 | Alva Wilmer | 65 | Head | Barber | Indiana |
| 30 | Bertha S. Priebe | 58 | Housekeeper | Housekeeper | Indiana |
| 31 | Clifford K. Jones | 36 | Head | Painter | Indiana |
| 32 | Vera H. Jones | 26 | Wife | Assembler | Indiana |
| 33 | Dora L. Jones | 11 | Daughter | — | Indiana |
| 34 | Leon M. Jones | 19 | Brother | Laborer | Indiana |
| 35 | Walter J. Zimmerman | 31 | Head | Shipping Clerk | Indiana |
| 36 | Alice V. Zimmerman | 29 | Wife | — | Indiana |
| 37 | Walter J. Jr. Zimmerman | 5 | Son | — | Indiana |
| 38 | Virginia L. Zimmerman | 4 | Daughter | — | Indiana |
| 39 | Gorgiann Zimmerman | 2 | Daughter | — | Indiana |
Related Census Records
Pedigree Summary
John + 4 siblings
Gen 1 · 2 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)