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Margaret Mahoney — 1940 US Census Record
Model Tree available1940 United States Federal Census · Middlesex-County, Massachusetts
Our Model Tree links this Margaret Mahoney across the 1920, 1930 and 1940 US Censuses in Middlesex-County, Massachusetts (XGBoost, ~Confirmed), with identified parents James & Thomas — first a daughter (b.~1896), then head of a 6-person household.
Age 44
b. ~1896
Female
Daughter
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, Massachusetts |
| Surname | Mahoney |
| Given Name | Margaret M |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 44 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | SOMERVILLE CITY |
| 1935 Residence (County) | MIDDLESEX |
| Additional Details | |
| Occupation | Designer |
| Industry | Wholesale Candy Factory |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 768 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same House |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Designer |
| Township / Ward | Somerville City |
| Est. Birth Year | ~1896 |
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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Margaret | Age | Birth yr |
|---|---|---|---|---|
| Marion Mahoney | Daughter | — | 38 | ~1902 |
| James Mahoney | Son | — | 34 | ~1906 |
| Ellen Mahoney | Daughter | — | 42 | ~1898 |
| Ellen Mahoney | Spouse | — | 71 | ~1869 |
| Margaret Mahoney | Daughter | — | 44 | ~1896 |
| James Mahoney | Head | — | 70 | ~1870 |
Census Appearances
1920
Middlesex, Massachusetts
Daughter, age 23
Middlesex, Massachusetts · implied b. ~1897 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mahoney |
| Given Name | Margaret G. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Occupation | Clerk |
| Industry | Office |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Middlesex, Massachusetts
Daughter, age 33
Middlesex, Massachusetts · implied b. ~1897 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mahoney |
| Given Name | Margaret G. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 33 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Occupation | Operator |
| Industry | Telephone |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Middlesex-County, Massachusetts
Daughter, age 44
Middlesex-County, Massachusetts · implied b. ~1896 — 6 household members
| Surname | Mahoney |
| Given Name | Margaret M |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 44 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | SOMERVILLE CITY |
| 1935 Residence (County) | MIDDLESEX |
| Occupation | Designer |
| Industry | Wholesale Candy Factory |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 768 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same House |
| 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 James Mahoney (~0.92 confidence) and father Thomas Mahoney (~0.92 confidence) and mother Ellen Mahoney (~0.92 confidence) and mother Mary Mahoney (~0.92 confidence) and mother Mary Mahoney (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
James Mahoney
b. ~1870
Source father
● Household
· direct · ~0.92
Father
Thomas Mahoney
b. ~1860
Source father
● Household
· direct · ~0.92
Mother
Ellen Mahoney
b. ~1869
Source mother
● Household
· direct · ~0.92
Mother
Mary Mahoney
b. ~1861
Source mother
● Household
· direct · ~0.92
Mother
Mary Mahoney
b. ~1863
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Margaret Mahoney
Daughter · 1940 · age 44 · b. ~1896 · Massachusetts
★ You are viewing this record
Sibling
James Mahoney
Sibling · 1940 · age 34
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ellen Mahoney
Sibling · 1940 · age 42
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Marion Mahoney
Sibling · 1940 · age 38
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 — Middlesex-County, Massachusetts
Open full size
1940 US Federal Census — Middlesex-County, Massachusetts
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01705-00040)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Bridget Mclaughlin | 46 | Wife | — | North Ireland |
| 2 | William J Mclaughlin | 21 | Son | Sorter | Massachusetts |
| 3 | Lawrence Mclaughlin | 19 | Son | Soda Clerk | Massachusetts |
| 4 | Mary R Mclaughlin | 11 | Daughter | — | Massachusetts |
| 5 | John J Nyberg | 72 | Head | Adviser | Sweden |
| 6 | Harold W Lundstrom | 46 | Son-in-law | Superintendent | Massachusetts |
| 7 | Edith N Lundstrom | 44 | Daughter | — | Massachusetts |
| 8 | Mildred Lundstrom | 18 | Granddaughter | — | Massachusetts |
| 9 | Harold W Jr Lundstrom | 16 | Grandson | — | Massachusetts |
| 10 | Clyde P Gardner | 59 | Head | Stationary Fireman | Canada English |
| 11 | Bessie M Gardner | 58 | Wife | — | Canada English |
| 12 | John U M Gardner | 35 | Son | Machine Oiler | Canada English |
| 13 | Albert R Bernado | 36 | Head | Stenographer | Massachusetts |
| 14 | Frances A Bernado | 35 | Wife | Tres | Massachusetts |
| 15 | Robert Bernado | 5 | Son | — | Massachusetts |
| 16 | Kathryn T Busher | 53 | Head | — | Massachusetts |
| 17 | Robert F Busher | 26 | Son | Computer Geodetic | Pennsylvania |
| 18 | Mary D Busher | 25 | Daughter | Typist | Pennsylvania |
| 19 | Helen B Busher | 19 | Daughter | — | Pennsylvania |
| 20 | Murray O York | 27 | Head | Dairy | Massachusetts |
| 21 | Phyllis J York | 25 | Wife | Clerk Office | Massachusetts |
| 22 | Clarence W Doherty | 39 | Head | Fireman | Massachusetts |
| 23 | Gertrude Doherty | 40 | Wife | — | Massachusetts |
| 24 | Robert Doherty | 7 | Son | — | Massachusetts |
| 25 | Mary L Doherty | 5 | Daughter | — | Massachusetts |
| 26 | James G Doherty | 3 | Son | — | Massachusetts |
| 27 | James Mahoney | 70 | Head | Freight Handler | Irish Free State |
| 28 | Ellen M Mahoney | 71 | Wife | — | Irish Free State |
| 29 | Margaret M Mahoney THIS PERSON | 44 | Daughter | Designer | Massachusetts |
| 30 | Ellen F Mahoney | 42 | Daughter | Inspector | Massachusetts |
| 31 | Marion R Mahoney | 38 | Daughter | Salesgirl | Massachusetts |
| 32 | James J Mahoney | 34 | Son | Tractor Operator | Massachusetts |
| 33 | Timothy J Ryan | 81 | Head | — | Irish Free State |
| 34 | Desmond Nellie A Ryan | 48 | Daughter | Stenographer | Massachusetts |
| 35 | Alfred J Mcfadden | 47 | Head | Police Officer | Massachusetts |
| 36 | Emma F Mcfadden | 44 | Wife | — | Massachusetts |
| 37 | Dorothy I Mcfadden | 17 | Daughter | — | Massachusetts |
| 38 | Alfred J Mcfadden | 14 | Son | — | Massachusetts |
| 39 | Ethel M Mcminn | 51 | Sister-in-law | Sec. | Massachusetts |
| 40 | Rodrick E Field | 58 | Head | Rent Collector | Massachusetts |
Related Census Records
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)