JM
John Mcnamara — 1940 US Census Record
Model Tree available1940 United States Federal Census · Summit-County, Ohio
Our Model Tree links this John Mcnamara across the 1920, 1930 and 1940 US Censuses in Summit-County, Ohio (XGBoost, ~Confirmed), with identified parents James & Mary — first a son (b.~1909), then head of a 6-person household.
Age 31
b. ~1909
Male
Son
Born: Ohio
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Summit-County, Ohio |
| Surname | McNamara |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 31 |
| Marital Status | Single |
| Birthplace | Ohio |
| 1935 Residence (City) | Barberton |
| 1935 Residence (County) | Summit |
| Additional Details | |
| Occupation | Salesman |
| Industry | General Insurance |
| Class of Worker | PW |
| Hours Worked | 30 |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
| Occupation | Salesman |
| Township / Ward | Barberton |
| 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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Margaret Mcnamara | Daughter | — | 25 | ~1915 |
| Mary Mcnamara | Head | — | 69 | ~1871 |
| Robt Nero | Other | — | — | |
| Kathryn Doherty | Other | — | 34 | ~1906 |
| John Mcnamara | Son | — | 31 | ~1909 |
| James Mcnamara | Son | — | 27 | ~1913 |
Census Appearances
1920
Summit, Ohio
Son, age 11
Summit, Ohio · implied b. ~1909 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McNamara |
| Given Name | John P |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Ohio |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Ohio |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
1930
Summit, Ohio
Son, age 21
Summit, Ohio · implied b. ~1909 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McNamara |
| Given Name | John J. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Ohio |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Ohio |
| Occupation | Salesman |
| Industry | Real Estate |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
1940
Summit-County, Ohio
Son, age 31
Summit-County, Ohio · implied b. ~1909 — 6 household members
| Surname | McNamara |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 31 |
| Marital Status | Single |
| Birthplace | Ohio |
| 1935 Residence (City) | Barberton |
| 1935 Residence (County) | Summit |
| Occupation | Salesman |
| Industry | General Insurance |
| Class of Worker | PW |
| Hours Worked | 30 |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 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 Mcnamara across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father James Mcnamara (~0.92 confidence) and mother Mary Mcnamara (~0.92 confidence) and mother Mary Mcnamara (~0.92 confidence) and mother Mary Mcnamara (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
James Mcnamara
b. ~1867
Source father
● Household
· direct · ~0.92
Mother
Mary Mcnamara
b. ~1870
Source mother
● Household
· direct · ~0.92
Mother
Mary Mcnamara
b. ~1871
Source mother
● Household
· direct · ~0.92
Mother
Mary Mcnamara
b. ~1876
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Mcnamara
Son · 1940 · age 31 · b. ~1909 · Ohio
★ You are viewing this record
Sibling
Margaret Mcnamara
Sibling · 1940 · age 25
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Mcnamara
Sibling · 1940 · age 27
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 — Summit-County, Ohio
Open full size
1940 US Federal Census — Summit-County, Ohio
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03152-00578)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | John B Rody | 63 | Head | Fireman | Austria |
| 2 | Antoinette Rody | 56 | Wife | — | Austria |
| 3 | Mary Rody | 29 | Daughter | Clerk | Ohio |
| 4 | Joseph Rody | 27 | Son | Shipping Clerk | Ohio |
| 5 | Angela Rody | 25 | Daughter | Assistant | Ohio |
| 6 | Dorothy Rody | 23 | Daughter | Clerk | Ohio |
| 7 | Isabel Rody | 15 | Daughter | — | Ohio |
| 8 | Ida Longfellow | 47 | Head | — | Ohio |
| 9 | Anna Longfellow | 45 | Sister | Owner | Ohio |
| 10 | Paul Stahl Dresher | 23 | Nephew | Clerk | Ohio |
| 11 | Rita Stahl Dresher | 16 | Niece | — | Ohio |
| 12 | Ralph Isenberg | 23 | Lodger | Mechanical Engineer | So. Carolina |
| 13 | Carrie Arnold | 74 | Head | — | Ohio |
| 14 | Theodore Bade | 34 | Lodger | Clerk | New York |
| 15 | Clifford Backmann | 24 | Lodger | Office Clerk | New York |
| 16 | Michael Nakien | 24 | Lodger | Draftsman | Minnesota |
| 17 | John D Manoly | 64 | Head | Watchman | Rumania |
| 18 | June Manoly | 19 | Daughter | — | Ohio |
| 19 | Dorothy Manoly | 18 | Daughter | — | Ohio |
| 20 | Ariel Johnson | 23 | Lodger | Machinist | Ohio |
| 21 | Lawrence Hickman | 38 | Head | Salesman | Ohio |
| 22 | Gladys Hickman | 36 | Wife | — | Ohio |
| 23 | Gertrude Hickman | 17 | Daughter | — | Ohio |
| 24 | Alice Hickman | 12 | Daughter | — | Ohio |
| 25 | Haddon Krider | 40 | Head | Manager | Pennsylvania |
| 26 | Elizabeth Krider | 34 | Wife | — | Kentucky |
| 27 | Mary Sue Krider | 5 | Daughter | — | Ohio |
| 28 | F. C. Weigand | 52 | Head | Funeral Director | Ohio |
| 29 | Hattie Weigand | 53 | Wife | — | Ohio |
| 30 | William Weigand | 12 | Son | — | Ohio |
| 31 | Karl Hornhalar | 60 | Head | Asst Mgr | Ohio |
| 32 | Mary R Hornhalar | 58 | Wife | — | Ohio |
| 33 | John Hornhalar | 27 | Son | Clerk | Ohio |
| 34 | Jean Hornhalar | 13 | Daughter | — | Ohio |
| 35 | Mary Mcnamara | 69 | Head | — | Ohio |
| 36 | John Mcnamara THIS PERSON | 31 | Son | Salesman | Ohio |
| 37 | Margaret Mcnamara | 25 | Daughter | Teacher | Ohio |
| 38 | James Mcnamara | 27 | Son | Printer | Ohio |
| 39 | Robt Nero | None | Lodger | — | — |
| 40 | Kathryn Doherty | 34 | Lodger | Social Worker | Pennsylvania |
Pedigree Summary
John + 2 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)