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John Mcnamara — 1940 US Census Record
Model Tree available1940 United States Federal Census · Delaware-County, Ohio
Our Model Tree links this John Mcnamara across the 1920, 1930 and 1940 US Censuses in Delaware-County, Ohio (XGBoost, ~Confirmed), with identified parents Merle & Mayme — first a son (b.~1919), then head of a 7-person household.
Age 21
b. ~1919
Male
Son
Born: Ohio
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Delaware-County, Ohio |
| Surname | McNamara |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Ohio |
| 1935 Residence (City) | Berlin Township |
| 1935 Residence (County) | Delaware |
| Additional Details | |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | NP |
| Hours Worked | 40 |
| Income (1939) | 388 |
| Highest Grade | Hs 4 |
| 1935 Residence | Ohio |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
| Occupation | Farmer |
| Township / Ward | Berlin Township |
| Est. Birth Year | ~1919 |
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 |
|---|---|---|---|---|
| Ellinor Mcnamara | Daughter | — | 23 | ~1917 |
| Merle Mcnamara | Head | — | 52 | ~1888 |
| Arval Huett | Other | — | 62 | ~1878 |
| Robert Mcnamara | Son | — | 17 | ~1923 |
| Philip Mcnamara | Son | — | 19 | ~1921 |
| John Mcnamara | Son | — | 21 | ~1919 |
| Mayme Mcnamara | Spouse | — | 49 | ~1891 |
Census Appearances
1920
Delaware, Ohio
Son, age
Delaware, Ohio · implied b. ~1920 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McNamara |
| Given Name | John F. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 0 |
| Marital Status | Single |
| Birthplace | Ohio |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Ohio |
| Occupation | none |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
1930
Delaware, Ohio
Son, age 10
Delaware, Ohio · implied b. ~1920 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McNamara |
| Given Name | John F |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Ohio |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Ohio |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
1940
Delaware-County, Ohio
Son, age 21
Delaware-County, Ohio · implied b. ~1919 — 7 household members
| Surname | McNamara |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Ohio |
| 1935 Residence (City) | Berlin Township |
| 1935 Residence (County) | Delaware |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | NP |
| Hours Worked | 40 |
| Income (1939) | 388 |
| Highest Grade | Hs 4 |
| 1935 Residence | Ohio |
| 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 Mcnamara across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Merle Mcnamara (~0.92 confidence) and mother Mayme Mcnamara (~0.92 confidence) and mother Mary Mcnamara (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Merle Mcnamara
b. ~1888
Source father
● Household
· direct · ~0.92
Mother
Mayme Mcnamara
b. ~1891
Source mother
● Household
· direct · ~0.92
Mother
Mary Mcnamara
b. ~1892
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Mcnamara
Son · 1940 · age 21 · b. ~1919 · Ohio
★ You are viewing this record
Sibling
Robert Mcnamara
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Philip Mcnamara
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ellinor Mcnamara
Sibling · 1940 · age 23
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 — Delaware-County, Ohio
Open full size
1940 US Federal Census — Delaware-County, Ohio
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03062-00060)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Peter Csomos | 50 | Head | Farmer | Hungary |
| 2 | Mary Csomos | 55 | Wife | House Wife | Hungary |
| 3 | John Csomos | 7 | Grandson | — | Ohio |
| 4 | Peter Aloms | 55 | Lodger | Labourer | Hungary |
| 5 | Edward Haer | 55 | Head | Farmer | Ohio |
| 6 | Katherine A. Haer | 58 | Wife | House Wife | Ohio |
| 7 | Joseph L. Haer | 17 | Son | Chores | Ohio |
| 8 | Allan Scary | 24 | Son in law | Laborer | Ohio |
| 9 | Beulah Scary | 27 | Daughter | House Wife | Ohio |
| 10 | Merle Mcnamara | 52 | Head | Farmer | Ohio |
| 11 | Mayme Mcnamara | 49 | Wife | House Wife | Ohio |
| 12 | Ellinor Mcnamara | 23 | Daughter | Nurse | Ohio |
| 13 | John Mcnamara THIS PERSON | 21 | Son | Farmer | Ohio |
| 14 | Philip Mcnamara | 19 | Son | Farmer | Ohio |
| 15 | Robert Mcnamara | 17 | Son | Chores | Ohio |
| 16 | Arval Huett | 62 | Hired man | Farm Hand | Ohio |
| 17 | Fred Shade | 53 | Head | Farmer | Ohio |
| 18 | Edna Shade | 54 | Wife | House Wife | Ohio |
| 19 | Philip Shade | 23 | Son | Farmer | Ohio |
| 20 | Donald Doring | 25 | Head | Farmer Hand | Ohio |
| 21 | Emma Doring | 25 | Wife | House Wife | Ohio |
| 22 | Barbara Doring | 6 | Daughter | — | Ohio |
| 23 | Allen Doring | 5 | Son | — | Ohio |
| 24 | William Inwin | 70 | Head | Old Age Pension Retired | Ohio |
| 25 | Clinton Ross | 60 | Head | Farmer | Ohio |
| 26 | Horace Toler | 40 | Head | Farmer | Ohio |
| 27 | Cecil Toler | 39 | Wife | House Wife | Ohio |
| 28 | Joan Toler | 9 | Daughter | — | Ohio |
| 29 | James E. Toler | 2 | Son | — | Ohio |
| 30 | Dorothy F. Williams | 8 | Lodger | — | Ohio |
| 31 | Howard Balch | 67 | Head | Caretaker | Ohio |
| 32 | Margrette Balch | 60 | Wife | Housewife | Ohio |
| 33 | Walter Balch | 21 | Son | Laborer | Ohio |
| 34 | Helen Rutherford | 24 | Daughter | House Keeper | Ohio |
| 35 | Robert Rutherford | 3 | Son | — | Ohio |
| 36 | J. C. Smith | 48 | Head | Carpenter | Ohio |
| 37 | Florence Smith | 52 | Wife | House Wife | Ohio |
| 38 | Howard L. Whitman | 63 | Head | Farmer | Ohio |
| 39 | Stella Whitman | 51 | Wife | House Keeper | Ohio |
| 40 | Eber J. Sherman | 54 | Head | Farmer | Ohio |
Pedigree Summary
John + 3 siblings
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)