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Margaret Mcnamara — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Montgomery-County, Pennsylvania
Our Model Tree links this Margaret Mcnamara across the 1930 and 1940 US Censuses in Montgomery-County, Pennsylvania (XGBoost, ~Confirmed) — first a daughter (b.~1926), then head of a 7-person household.
Age 14
b. ~1926
Female
Daughter
Born: Pennsylvania
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Montgomery-County, Pennsylvania |
| Surname | McNamara |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Conshohocken Borough |
| 1935 Residence (County) | Montgomery |
| Additional Details | |
| Highest Grade | No 7 |
| 1935 Residence | Same Place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Township / Ward | Conshohocken Borough |
| Est. Birth Year | ~1926 |
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 Margaret | Age | Birth yr |
|---|---|---|---|---|
| John Mcnamara | Son | — | 16 | ~1924 |
| Owen Mcnamara | Son | — | 2 | ~1938 |
| Patricia Mcnamara | Daughter | — | 6 | ~1934 |
| John Mcnamara | Head | — | 42 | ~1898 |
| Margaret Mcnamara | Daughter | — | 14 | ~1926 |
| Margaret Mcnamara | Spouse | — | 40 | ~1900 |
| Joan Mcnamara | Daughter | — | 8 | ~1932 |
Census Appearances
1930
Montgomery, Pennsylvania
Daughter, age 5
Montgomery, Pennsylvania · implied b. ~1925 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McNamara |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Montgomery-County, Pennsylvania
Daughter, age 14
Montgomery-County, Pennsylvania · implied b. ~1926 — 7 household members
| Surname | McNamara |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Conshohocken Borough |
| 1935 Residence (County) | Montgomery |
| Highest Grade | No 7 |
| 1935 Residence | Same Place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
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 Margaret Mcnamara across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Margaret Mcnamara
Daughter · 1940 · age 14 · b. ~1926 · Pennsylvania
★ You are viewing this record
Sibling
Joan Mcnamara
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Patricia Mcnamara
Sibling · 1940 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Owen Mcnamara
Sibling · 1940 · age 2
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Mcnamara
Sibling · 1940 · age 16
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 — Montgomery-County, Pennsylvania
Open full size
1940 US Federal Census — Montgomery-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03578-00182)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Dorothy Pruper | Proper | 28 | Wife | 0 | Pennsylvania |
| 2 | Walter Jr. Pruper | Proper | 7 | Son | — | Pennsylvania |
| 3 | George Pruper | Proper | 4 | Son | — | Pennsylvania |
| 4 | Arthur Richardson | 47 | Head | Engineer | Maryland |
| 5 | Marie Richardson | 47 | Wife | 0 | Pennsylvania |
| 6 | William Richardson | 24 | Son | Tester | Pennsylvania |
| 7 | Arthur Richardson | 23 | Son | — | Pennsylvania |
| 8 | Dorothy Richardson | 21 | Daughter | Packer | Pennsylvania |
| 9 | Reba Richardson | 19 | Daughter | Spinner | Pennsylvania |
| 10 | Robert Richardson | 9 | Son | — | Pennsylvania |
| 11 | Donald Richardson | 2 | Son | — | Pennsylvania |
| 12 | Marjorie Richardson | 14 | Daughter | — | Pennsylvania |
| 13 | Alice Bicking | 32 | Head | 0 | Pennsylvania |
| 14 | John Bicking | 14 | Son | — | Pennsylvania |
| 15 | Doris Bicking | 12 | Daughter | — | Pennsylvania |
| 16 | Thomas Bicking | 9 | Son | — | Pennsylvania |
| 17 | Elizabeth Bicking | 6 | Daughter | — | Pennsylvania |
| 18 | Franklin Hustill | Hartill | 81 | Father | 0 | Pennsylvania |
| 19 | Franklin Hustill | Hartill | 48 | Brother | Laborer | Pennsylvania |
| 20 | Howard Bailey | 47 | Head | Laborer | Pennsylvania |
| 21 | Amelia Bailey | 48 | Wife | 0 | Pennsylvania |
| 22 | William Bailey | 23 | Son | New Worker | Pennsylvania |
| 23 | Leonard Bailey | 18 | Son | New Worker | Pennsylvania |
| 24 | Ida Bailey | 16 | Daughter | 0 | Pennsylvania |
| 25 | Adell Spina | 31 | Wife | 0 | Mississippi |
| 26 | Robert Spina | 13 | Son | — | Pennsylvania |
| 27 | Margaret Spina | 11 | Daughter | — | Pennsylvania |
| 28 | Gloria Spina | 6 | Daughter | — | Pennsylvania |
| 29 | Daniel J. Kelly | 31 | Head | Tire Maker | Pennsylvania |
| 30 | Helen Kelly | 25 | Wife | 0 | Pennsylvania |
| 31 | Daniel Jr. Kelly | 3 | Son | — | Pennsylvania |
| 32 | John Mcnamara | 42 | Head | Curing | Pennsylvania |
| 33 | Margaret Mcnamara | 40 | Wife | 0 | Pennsylvania |
| 34 | John Mcnamara | 16 | Son | 0 | Pennsylvania |
| 35 | Margaret Mcnamara THIS PERSON | 14 | Daughter | — | Pennsylvania |
| 36 | Joan Mcnamara | 8 | Daughter | — | Pennsylvania |
| 37 | Patricia Mcnamara | 6 | Daughter | — | Pennsylvania |
| 38 | Owen Mcnamara | 2 | Son | — | Pennsylvania |
| 39 | Josephine Ehlinger | 79 | Head | 0 | Pennsylvania |
| 40 | Leo S. Ehlinger | 38 | Son | Machinist | Pennsylvania |
Related Census Records
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)