JD
John Dwyer — 1940 US Census Record
Model Tree available1940 United States Federal Census · Montgomery-County, Ohio
Our Model Tree links this John Dwyer across the 1920, 1930 and 1940 US Censuses in Montgomery-County, Ohio (XGBoost, ~Confirmed), with identified parents John & John — first a head (b.~1909), then head of a 3-person household.
Age 31
b. ~1909
Male
Head
Born: Ohio
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Montgomery-County, Ohio |
| Surname | Dwyer |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 31 |
| Marital Status | Married |
| Birthplace | Ohio |
| 1935 Residence (City) | Dayton |
| 1935 Residence (County) | Montgomery |
| Additional Details | |
| Occupation | Salesman |
| Industry | Wholesale Groc. |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 1300 |
| Highest Grade | H-4 |
| 1935 Residence | Same place |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
| Occupation | Salesman |
| Township / Ward | Dayton |
| Est. Birth Year | ~1909 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Mary Dwyer | Daughter | — | 3 | ~1937 |
| John Dwyer | Head | — | 31 | ~1909 |
| Mary Dwyer | Spouse | — | 26 | ~1914 |
Census Appearances
1920
Montgomery, Ohio
Son, age 11
Montgomery, Ohio · implied b. ~1909 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Dwyer |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Ohio |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Indiana |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
1930
Montgomery, Ohio
Son, age 21
Montgomery, Ohio · implied b. ~1909 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Dwyer |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Ohio |
| Age at First Marriage | 21 |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Indiana |
| Occupation | Salesman |
| Industry | Elec. Refrigerator |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | No |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
1940
Montgomery-County, Ohio
Head, age 31
Montgomery-County, Ohio · implied b. ~1909 — 3 household members
| Surname | Dwyer |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 31 |
| Marital Status | Married |
| Birthplace | Ohio |
| 1935 Residence (City) | Dayton |
| 1935 Residence (County) | Montgomery |
| Occupation | Salesman |
| Industry | Wholesale Groc. |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 1300 |
| 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 Dwyer across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father John Dwyer (~0.92 confidence) and father John Dwyer (~0.92 confidence) and mother Mary Dwyer (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
John Dwyer
b. ~1866
Source father
● Household
· direct · ~0.92
Father
John Dwyer
b. ~1870
Source father
● Household
· direct · ~0.92
Mother
Mary Dwyer
b. ~1872
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Dwyer
Head · 1940 · age 31 · b. ~1909 · Ohio
★ You are viewing this record
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-t0627-03252-00270)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Cathrn Brower | 44 | Wife | — | Ohio |
| 42 | Eileen Brower | 17 | Daughter | — | Ohio |
| 43 | Betty Brower | 14 | Daughter | — | Ohio |
| 44 | Dale Brower | 12 | Son | — | Ohio |
| 45 | Guy C. O. Pepple | 46 | Head | Order Supply | Ohio |
| 46 | Charlotte A. Pepple | 45 | Wife | — | Ohio |
| 47 | Charlotte W. Pepple | 18 | Daughter | — | Ohio |
| 48 | Walter Conover | 28 | Head | Assembler | Ohio |
| 49 | Kathryne Conover | 22 | Wife | Clerical Work | Ohio |
| 50 | David Landis | 48 | Head | Manager | Ohio |
| 51 | Ellen Landis | 45 | Wife | — | Ohio |
| 52 | Sarah Landis | 45 | Sister | — | Ohio |
| 53 | Byrd Parman | 50 | Head | Barber | Tennessee |
| 54 | Roxy Parman | 57 | Wife | — | Tennessee |
| 55 | Shirley Parman | 12 | Daughter | — | Ohio |
| 56 | John Dwyer THIS PERSON | 31 | Head | Salesman | Ohio |
| 57 | Mary D. Dwyer | 26 | Wife | — | Ohio |
| 58 | Mary Patricia Dwyer | 3 | Daughter | — | Ohio |
| 59 | Fred A. Beach | 53 | Head | Manager | Ohio |
| 60 | Grace S. Beach | 53 | Wife | — | Ohio |
| 61 | Ernest Perry | 54 | Head | Collector | Ohio |
| 62 | Sarah Perry | 52 | Wife | — | Kentucky |
| 63 | Gerson Perry | 24 | Son | Electric Motor | Ohio |
| 64 | Ruth Perry | 17 | Daughter | — | Ohio |
| 65 | Walter Clonch | 50 | Head | Teacher | Ohio |
| 66 | Bessie B. Clonch | 56 | Wife | — | Pennsylvania |
| 67 | Catherine Fluhart | 76 | Head | — | Ohio |
| 68 | Herbert Harter | 49 | Head | Screw Maker | Ohio |
| 69 | Alice Harter | 37 | Wife | Substitute Teacher | Ohio |
| 70 | Ruth Harter | 15 | Daughter | — | Ohio |
| 71 | Howard Sellers | 34 | Head | Salesman | Ohio |
| 72 | Helen B. Sellers | 33 | Wife | — | Ohio |
| 73 | David Sellers | 1 | Son | — | Ohio |
| 74 | David Simons | 42 | Head | Tool Maker | Ohio |
| 75 | Stella Simons | 40 | Wife | — | Ohio |
| 76 | David Jr. Simons | 12 | Son | — | Ohio |
| 77 | Henry Simons | 6 | Son | — | Ohio |
| 78 | Ella D. Gibson | 67 | Head | — | Ohio |
| 79 | Pearl H. Sigler | 49 | Head | Attorney | Ohio |
| 80 | Nora M. Sigler | 48 | Wife | — | Ohio |
Pedigree Summary
John
Gen 1 · 3 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)