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Mary Mcnamara — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Livingston-County, Michigan
Our Model Tree links this Mary Mcnamara across the 1930 and 1940 US Censuses in Livingston-County, Michigan (XGBoost, ~Confirmed) — first a daughter (b.~1927), then head of a 10-person household.
Age 13
b. ~1927
Female
Daughter
Born: Michigan
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Livingston-County, Michigan |
| Surname | McNamara |
| Given Name | Mary E |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Michigan |
| 1935 Residence (City) | Genoa Twp |
| 1935 Residence (County) | Livingston |
| Additional Details | |
| Highest Grade | No 6 |
| 1935 Residence | Same House |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
| Township / Ward | Genoa Twp |
| Est. Birth Year | ~1927 |
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.
10 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Norena Parker | Daughter | — | 10 | ~1930 |
| Arthur Mclane | Daughter | — | 21 | ~1919 |
| Mary Mcnamara | Daughter | — | 13 | ~1927 |
| Dolores Mclane | Daughter | — | 13 | ~1927 |
| Thelma Mcnamara | Daughter | — | 17 | ~1923 |
| Joseph Seigle | Head | — | 39 | ~1901 |
| William Burns | Other | — | 67 | ~1873 |
| Leonard Seigle | Other | — | 29 | ~1911 |
| Farrand Mclane | Son | — | 18 | ~1922 |
| Richard Parker | Son | — | 8 | ~1932 |
Census Appearances
1930
Livingston, Michigan
Daughter, age 3
Livingston, Michigan · implied b. ~1927 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McNamara |
| Given Name | Mary E |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | Michigan |
| Father's Birthplace | Michigan |
| Mother's Birthplace | Michigan |
| Occupation | none |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
1940
Livingston-County, Michigan
Daughter, age 13
Livingston-County, Michigan · implied b. ~1927 — 10 household members
| Surname | McNamara |
| Given Name | Mary E |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Michigan |
| 1935 Residence (City) | Genoa Twp |
| 1935 Residence (County) | Livingston |
| Highest Grade | No 6 |
| 1935 Residence | Same House |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
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 Mary Mcnamara across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Mcnamara
Daughter · 1940 · age 13 · b. ~1927 · Michigan
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Sibling
Dolores Mclane
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Richard Parker
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Farrand Mclane
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thelma Mcnamara
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Norena Parker
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Arthur Mclane
Sibling · 1940 · age 21
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 — Livingston-County, Michigan
Open full size
1940 US Federal Census — Livingston-County, Michigan
Page Contents
14 people indexed on this census page (nara:1940:m-t0627-01780-00170)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Joseph W Seigle | 39 | Head | Laborer | Ohio |
| 2 | Leonard Seigle | 29 | Brother | Laborer | Ohio |
| 3 | Thelma Mcnamara | 17 | Daughter | — | Michigan |
| 4 | Mary E Mcnamara THIS PERSON | 13 | Daughter | — | Michigan |
| 5 | Norena Parker | 10 | Daughter | — | Michigan |
| 6 | Richard Parker | 8 | Son | — | Michigan |
| 7 | Arthur Mclane | 21 | Daughter | Millwright | Michigan |
| 8 | Farrand Mclane | 18 | Son | Laborer | Michigan |
| 9 | Dolores Mclane | 13 | Daughter | — | Michigan |
| 10 | William Burns | 67 | Lodger | — | Michigan |
| 11 | Joseph J Vivian | 48 | Head | Asphalt Foreman | Michigan |
| 12 | Mary H Vivian | 43 | Wife | — | Rhode Island |
| 13 | Mary Vivian | 10 | Daughter | — | Michigan |
| 14 | Veronica Vivian | 9 | Daughter | — | Michigan |
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)