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John Mcnamara — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Dakota-County, Minnesota
Our Model Tree links this John Mcnamara across the 1920, 1930 and 1940 US Censuses in Dakota-County, Minnesota (XGBoost, ~Confirmed) — first a head (b.~1865), then head of a 4-person household.
Age 75
b. ~1865
Male
Head
Born: Minnesota
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Dakota-County, Minnesota |
| Surname | McNamara |
| Given Name | John J. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 75 |
| Marital Status | Married |
| Birthplace | Minnesota |
| 1935 Residence (City) | Ravenna Twp. |
| 1935 Residence (County) | Dakota |
| Additional Details | |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | OA |
| Hours Worked | 60 |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
| Occupation | Farmer |
| Township / Ward | Ravenna Twp |
| Est. Birth Year | ~1865 |
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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Eleanor Mcnamara | Daughter | — | 27 | ~1913 |
| John Mcnamara | Head | — | 75 | ~1865 |
| George Mcnamara | Son | — | 40 | ~1900 |
| Hannie Mcnamara | Spouse | — | 65 | ~1875 |
Census Appearances
1920
Dakota, Minnesota
Head, age 55
Dakota, Minnesota · implied b. ~1865 — 12 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McNamara |
| Given Name | John |
| Relationship to Head | head |
| Sex | M |
| Color / Race | White |
| Age | 55 |
| Marital Status | Married |
| Birthplace | Minnesota |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Farmer |
| Industry | General farm |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Home Owned/Rented | M |
| Birth State | Minnesota |
| Birth Country | United States |
| Year of Naturalization | O |
| Birthplace (normalized) | minnesota |
1930
Dakota, Minnesota
Head, age 65
Dakota, Minnesota · implied b. ~1865 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McNamara |
| Given Name | John E. H. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 65 |
| Marital Status | Married |
| Birthplace | Minnesota |
| Age at First Marriage | 30 |
| Father's Birthplace | Maine |
| Mother's Birthplace | Missouri |
| Occupation | Farmer |
| Industry | General farm |
| Class of Worker | OA |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Radio Set | yes |
| Veteran | No |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
1940
Dakota-County, Minnesota
Head, age 75
Dakota-County, Minnesota · implied b. ~1865 — 4 household members
| Surname | McNamara |
| Given Name | John J. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 75 |
| Marital Status | Married |
| Birthplace | Minnesota |
| 1935 Residence (City) | Ravenna Twp. |
| 1935 Residence (County) | Dakota |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | OA |
| Hours Worked | 60 |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
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.
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This person
Anchor record
John Mcnamara
Head · 1940 · age 75 · b. ~1865 · Minnesota
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Dakota-County, Minnesota
Open full size
1940 US Federal Census — Dakota-County, Minnesota
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01917-00597)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Frank A. Swanson | 55 | Head | Farmer | Iowa |
| 2 | Anna M. Swanson | 54 | Wife | House Keeper | Iowa |
| 3 | Bernice V. Swanson | 20 | Daughter | House Keeper | Minnesota |
| 4 | Deloris A. Swanson | 17 | Daughter | — | Minnesota |
| 5 | Mrs. Chris Marie Swanson | 10 | Daughter | — | Minnesota |
| 6 | Alfred W. Dunkel | 1 | Grandson | — | Minnesota |
| 7 | Ambrose A. Reuter | 33 | Head | Farmer | Minnesota |
| 8 | Martha Reuter | 29 | Wife | House Keeper | Minnesota |
| 9 | John F. Reuter | 69 | Head | — | Minnesota |
| 10 | Anna Reuter | 54 | Wife | — | Minnesota |
| 11 | Josephine Reuter | 31 | Daughter | — | Minnesota |
| 12 | Veronica Reuter | 24 | Daughter | — | Minnesota |
| 13 | Eva Marie Reuter | 21 | Daughter | — | Minnesota |
| 14 | William J. Reuter | 18 | Son | — | Minnesota |
| 15 | John J. Mcnamara THIS PERSON | 75 | Head | Farmer | Minnesota |
| 16 | Hannie E. Mcnamara | 65 | Wife | House Keeper | Minnesota |
| 17 | Eleanor Mcnamara | 27 | Daughter | — | Minnesota |
| 18 | George Mcnamara | 40 | Son | — | Minnesota |
| 19 | Martin Mcnamara | 68 | Head | Farmer | Minnesota |
| 20 | Mary Mcnamara | 60 | Wife | House Keeper | Minnesota |
| 21 | Dorothy Mcnamara | 23 | Daughter | Factory Work | Minnesota |
| 22 | Francis Mcnamara | 21 | Son | Laborer | Minnesota |
| 23 | Henry J. Langenfeld | 28 | Head | Farmer | Minnesota |
| 24 | Eleanor Langenfeld | 29 | Wife | House Keeper | Minnesota |
| 25 | Thomas Langenfeld | 5 | Son | — | Minnesota |
| 26 | Ralph Langenfeld | 4 | Son | — | Minnesota |
| 27 | Alvira Langenfeld | 3 | Daughter | — | Minnesota |
| 28 | Janet Langenfeld | 2 | Daughter | — | Minnesota |
| 29 | Louise Patricia Langenfeld | 0 | Daughter | — | Minnesota |
| 30 | Pat Hart | 56 | Head | Farmer | Minnesota |
| 31 | Margaret Hart | 59 | Wife | House Keeper | Minnesota |
| 32 | Vincent John Hart | 63 | Brother | Laborer | Minnesota |
| 33 | John E. Anderson | 73 | Boarder | Old Age | Sweden |
| 34 | Wesley C. Pittenger | 70 | Boarder | Old Age | Wisconsin |
| 35 | Henry Roswell | 39 | Boarder | — | Nebraska |
| 36 | Frank A. Carlson | 54 | Head | Stationary Engineer | Minnesota |
| 37 | Marie Carlson | 38 | Wife | — | Minnesota |
| 38 | Maire Carlson | 17 | Daughter | — | Minnesota |
| 39 | Frances Carlson | 16 | Daughter | — | Minnesota |
| 40 | Leonard Carlson | 15 | Son | — | Minnesota |
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)