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Margaret Mahoney — 1940 US Census Record
Model Tree available1940 United States Federal Census · Suffolk-County, Massachusetts
Our Model Tree links this Margaret Mahoney across the 1920, 1930 and 1940 US Censuses in Suffolk-County, Massachusetts (XGBoost, ~Confirmed), with identified parents Dennis & Francis — first a daughter (b.~1916), then head of a 7-person household.
Age 24
b. ~1916
Female
Daughter
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Suffolk-County, Massachusetts |
| Surname | Mahoney |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston City |
| 1935 Residence (County) | Suffolk |
| Additional Details | |
| Occupation | Typist |
| Industry | Bankers System |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1366 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Typist |
| Township / Ward | Boston City |
| Est. Birth Year | ~1916 |
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 |
|---|---|---|---|---|
| Francis Mahoney | Head | — | 44 | ~1896 |
| James Mahoney | Son | — | 25 | ~1915 |
| Helen Mahoney | Daughter | — | 22 | ~1918 |
| Patricia James | Other | — | 5 | ~1935 |
| Margaret Mahoney | Daughter | — | 24 | ~1916 |
| Arthur James | Other | — | 3 | ~1937 |
| Mary James | Daughter | — | 27 | ~1913 |
Census Appearances
1920
Suffolk, Massachusetts
Daughter, age 5
Suffolk, Massachusetts · implied b. ~1915 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mahoney |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Speaks English | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Suffolk, Massachusetts
Daughter, age 14
Suffolk, Massachusetts · implied b. ~1916 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mahoney |
| Given Name | Margaret M |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Suffolk-County, Massachusetts
Daughter, age 24
Suffolk-County, Massachusetts · implied b. ~1916 — 7 household members
| Surname | Mahoney |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston City |
| 1935 Residence (County) | Suffolk |
| Occupation | Typist |
| Industry | Bankers System |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1366 |
| Highest Grade | H 4 |
| 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 Mahoney across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Dennis Mahoney (~0.92 confidence) and father Francis Mahoney (~0.92 confidence) and father Michael Mahoney (~0.92 confidence) and mother Catherine Mahoney (~0.92 confidence) and mother Margaret Mahoney (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Dennis Mahoney
b. ~1875
Source father
● Household
· direct · ~0.92
Father
Francis Mahoney
b. ~1896
Source father
● Household
· direct · ~0.92
Father
Michael Mahoney
b. ~1888
Source father
● Household
· direct · ~0.92
Mother
Catherine Mahoney
b. ~1877
Source mother
● Household
· direct · ~0.92
Mother
Margaret Mahoney
b. ~1895
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Margaret Mahoney
Daughter · 1940 · age 24 · b. ~1916 · Massachusetts
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Sibling
Helen Mahoney
Sibling · 1940 · age 22
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Mahoney
Sibling · 1940 · age 25
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary James
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 — Suffolk-County, Massachusetts
Open full size
1940 US Federal Census — Suffolk-County, Massachusetts
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-01669-00172)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Leo Sauve | 34 | Head | Mechanic Helper | French Canada |
| 42 | Catherine F. Sauve | 38 | Wife | Housewife | Massachusetts |
| 43 | Marie C. Sauve | 4 | Daughter | — | Massachusetts |
| 44 | Manuel Dixon | 44 | Head | Attendant | Nova Scotia |
| 45 | Christine Dixon | 43 | Wife | Housewife | Nova Scotia |
| 46 | Manuel Dixon | 22 | Son | Laborer | Nova Scotia |
| 47 | Florence Dixon | 20 | Daughter | Packer | Nova Scotia |
| 48 | Evelyn Dixon | 16 | Daughter | — | Nova Scotia |
| 49 | Lawrence Dixon | 13 | Son | — | Massachusetts |
| 50 | Arthur Dixon | 11 | Son | — | Massachusetts |
| 51 | John Dixon | 7 | Son | — | Massachusetts |
| 52 | Peter Shortall | 39 | Head | Molder | English Canada |
| 53 | Margaret Shortall | 38 | Wife | Housewife | Massachusetts |
| 54 | Margaret Bray | 49 | Head | Housewife | Nova Scotia |
| 55 | Katherine Bray | 20 | Daughter | Waitress | Nova Scotia |
| 56 | Helen Bray | 17 | Daughter | — | Nova Scotia |
| 57 | Joseph Bray | 14 | Son | — | Massachusetts |
| 58 | Peter Cunningham | 72 | Lodger | Time Keeper | Ireland |
| 60 | Jeremiah Donovan | 77 | Head | — | Pennsylvania |
| 61 | Elizabeth Donovan | 58 | Wife | — | Eire |
| 62 | Virginia Donovan | 18 | Daughter | — | Massachusetts |
| 63 | John Calero | 40 | Head | Meat Cutter | Nova Scotia |
| 64 | Laura Calero | 44 | Wife | Housewife | Vermont |
| 65 | Francis Mahoney | 44 | Head | Salesman | Eire |
| 66 | James Mahoney | 25 | Son | Clerk Asst. | Massachusetts |
| 67 | Margaret Mahoney THIS PERSON | 24 | Daughter | Typist | Massachusetts |
| 68 | Helen Mahoney | 22 | Daughter | Typist | Massachusetts |
| 69 | Mary James | 27 | Daughter | Waitress | Massachusetts |
| 70 | Patricia James | 5 | Grandchild | — | Massachusetts |
| 71 | Arthur James | 3 | Grandson | — | Massachusetts |
| 72 | Matthias Mcgary | 34 | Head | Laborer | Massachusetts |
| 73 | Clara Mcgary | 37 | Wife | Housewife | Massachusetts |
| 74 | Matthias Mcgary | 10 | Son | — | Massachusetts |
| 75 | Richard Mcgary | 9 | Son | — | Massachusetts |
| 76 | Clara Mcgary | 7 | Daughter | — | Massachusetts |
| 77 | Dorothy Mcgary | 5 | Daughter | — | Massachusetts |
| 78 | Margaret Mcgary | 4 | Daughter | — | Massachusetts |
| 79 | Frances Mcgary | 3 | Daughter | — | Massachusetts |
| 80 | Thomas Mcgary | 2 | Son | — | Massachusetts |
Pedigree Summary
Margaret + 3 siblings
Gen 1 · 5 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)