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Margaret Mcmahon — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Suffolk-County, Massachusetts
Our Model Tree links this Margaret Mcmahon across the 1930 and 1940 US Censuses in Suffolk-County, Massachusetts (XGBoost, ~Confirmed) — first a spouse (b.~1895), then head of a 9-person household.
Age 45
b. ~1895
Female
Spouse
Born: Massachusetts
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Suffolk-County, Massachusetts |
| Surname | McMahon |
| Given Name | Margaret |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 45 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston city |
| 1935 Residence (County) | Suffolk |
| Additional Details | |
| Occupation | packer |
| Industry | candy co |
| Class of Worker | PW |
| Income (1939) | 0 |
| Highest Grade | No 6 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Packer |
| Township / Ward | Boston City |
| Est. Birth Year | ~1895 |
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.
9 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Margaret | Age | Birth yr |
|---|---|---|---|---|
| Bernard Mcmahon | Son | — | 12 | ~1928 |
| Harold Mcmahon | Head | — | 46 | ~1894 |
| Patricia Mcmahon | Daughter | — | 4 | ~1936 |
| Evelyn Mcmahon | Daughter | — | 14 | ~1926 |
| Margaret Mcmahon | Spouse | — | 45 | ~1895 |
| Grace Mcmahon | Daughter | — | 5 | ~1935 |
| Francis Mcmahon | Son | — | 15 | ~1925 |
| Richard Mcmahon | Son | — | 10 | ~1930 |
| Helen Mcmahon | Daughter | — | 14 | ~1926 |
Census Appearances
1930
Suffolk, Massachusetts
Other, age 34
Suffolk, Massachusetts · implied b. ~1896 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | MacMahon |
| Given Name | Margaret |
| Relationship to Head | Wife-H |
| Sex | F |
| Color / Race | White |
| Age | 34 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| Age at First Marriage | 27 |
| Father's Birthplace | Canada-English |
| Mother's Birthplace | Canada-English |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Suffolk-County, Massachusetts
Spouse, age 45
Suffolk-County, Massachusetts · implied b. ~1895 — 9 household members
| Surname | McMahon |
| Given Name | Margaret |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 45 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston city |
| 1935 Residence (County) | Suffolk |
| Occupation | packer |
| Industry | candy co |
| Class of Worker | PW |
| Income (1939) | 0 |
| Highest Grade | No 6 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
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 Mcmahon across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Margaret Mcmahon
Spouse · 1940 · age 45 · b. ~1895 · Massachusetts
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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 — Suffolk-County, Massachusetts
Open full size
1940 US Federal Census — Suffolk-County, Massachusetts
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01659-00273)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | William B. Bushey | 73 | Head | — | Eire |
| 2 | Thomas F. Salmon | 48 | Head | Checker | Eire |
| 3 | Maggie Salmon | 40 | Wife | Cleaner | Eire |
| 4 | John F. Salmon | 12 | Son | — | Massachusetts |
| 5 | John J. Mccarty | 48 | Head | Driver | Massachusetts |
| 6 | Catherine B. Mccarty | 41 | Wife | Wrapper | Massachusetts |
| 7 | Carol Ann Mccarty | 1 | Daughter | — | Massachusetts |
| 8 | Margaret V. Bailey | 38 | Head | Clerical | Massachusetts |
| 9 | Mary A. Gordon | 21 | Head | Waitress | Eire |
| 10 | Catherine Harrigan | 55 | Lodger | Cleaner | Eire |
| 11 | John P. Flood | 32 | Head | Electrician | Massachusetts |
| 12 | Marion Flood | 28 | Wife | At Home | Massachusetts |
| 13 | Marion Flood | 11 | Daughter | — | Massachusetts |
| 14 | Helen Flood | 10 | Daughter | — | Massachusetts |
| 15 | Ann M. Flood | 8 | Daughter | — | Massachusetts |
| 16 | John P. Jr. Flood | 6 | Son | — | Massachusetts |
| 17 | John Maguire | 44 | Head | Ship Fitter | New Jersey |
| 18 | Ruth A. Maguire | 43 | Wife | — | Massachusetts |
| 19 | Etta Maguire | 19 | Daughter | Dipper | New Jersey |
| 20 | Rosemary Maguire | 17 | Daughter | Packer | New Jersey |
| 21 | Carole Maguire | 14 | Daughter | — | New Jersey |
| 22 | Erna Maguire | 14 | Daughter | — | Massachusetts |
| 23 | Augustine Maguire | 11 | Daughter | — | Massachusetts |
| 24 | Bernard Maguire | 9 | Son | — | Massachusetts |
| 25 | Ralph Maguire | 7 | Son | — | Massachusetts |
| 26 | Henry Maguire | 4 | Son | — | Massachusetts |
| 27 | Phillip Maguire | 2 | Son | — | Massachusetts |
| 28 | Harold Mcmahon | 46 | Head | Welder | Massachusetts |
| 29 | Margaret Mcmahon THIS PERSON | 45 | Wife | Packer | Massachusetts |
| 30 | Francis J. Mcmahon | 15 | Son | Sheet Worker | Massachusetts |
| 31 | Helen T. Mcmahon | 14 | Daughter | Chambermaid | Massachusetts |
| 32 | Evelyn Mcmahon | 14 | Daughter | — | Massachusetts |
| 33 | Bernard W. Mcmahon | 12 | Son | — | Massachusetts |
| 34 | Richard Mcmahon | 10 | Son | — | Massachusetts |
| 35 | Grace Mcmahon | 5 | Daughter | — | Massachusetts |
| 36 | Patricia Mcmahon | 4 | Daughter | — | Massachusetts |
| 37 | Marie A. Dionne | 64 | Head | Weaver | French Canada |
| 38 | William Dionne | 30 | Son | Mechanic | Massachusetts |
| 39 | Emil Dionne | 24 | Son | Laborer | Massachusetts |
| 40 | Mary Burke | 46 | Head | Waitress | Massachusetts |
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)