MS
Mary Sweeney — 1940 US Census Record
Model Tree available1940 United States Federal Census · Suffolk-County, Massachusetts
Our Model Tree links this Mary Sweeney across the 1920, 1930 and 1940 US Censuses in Suffolk-County, Massachusetts (XGBoost, ~Confirmed), with identified parents George & Mary — first a daughter (b.~1913), then head of a 5-person household.
Age 27
b. ~1913
Female
Daughter
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Suffolk-County, Massachusetts |
| Surname | Sweeney |
| Given Name | Mary S. |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 27 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston |
| 1935 Residence (County) | Suffolk |
| Additional Details | |
| Occupation | Teacher |
| Industry | Public School |
| Class of Worker | GW |
| Hours Worked | 40 |
| Income (1939) | 1000 |
| Highest Grade | C 4 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Teacher |
| Township / Ward | Boston |
| Est. Birth Year | ~1913 |
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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Eleanor Sweeney | Daughter | — | 21 | ~1919 |
| Mary Sweeney | Daughter | — | 27 | ~1913 |
| Mary Sweeney | Head | — | 52 | ~1888 |
| Johanna Sweeney | Other | — | 49 | ~1891 |
| Neil Sweeney | Son | — | 23 | ~1917 |
Census Appearances
1920
Suffolk, Massachusetts
Daughter, age 5
Suffolk, Massachusetts · implied b. ~1915 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Sweeney |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Suffolk, Massachusetts
Daughter, age 16
Suffolk, Massachusetts · implied b. ~1914 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Sweeney |
| Given Name | Mary E |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Suffolk-County, Massachusetts
Daughter, age 27
Suffolk-County, Massachusetts · implied b. ~1913 — 5 household members
| Surname | Sweeney |
| Given Name | Mary S. |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 27 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston |
| 1935 Residence (County) | Suffolk |
| Occupation | Teacher |
| Industry | Public School |
| Class of Worker | GW |
| Hours Worked | 40 |
| Income (1939) | 1000 |
| Highest Grade | C 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 Mary Sweeney across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father George Sweeney (~0.92 confidence) and mother Mary Sweeney (~0.92 confidence) and father William Sweeney (~0.92 confidence) and mother Nora Sweeney (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
George Sweeney
b. ~1887
Source father
● Household
· direct · ~0.92
Mother
Mary Sweeney
b. ~1888
Source mother
● Household
· direct · ~0.92
Father
William Sweeney
b. ~1889
Source father
● Household
· direct · ~0.92
Mother
Nora Sweeney
b. ~1891
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Sweeney
Daughter · 1940 · age 27 · b. ~1913 · Massachusetts
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Sibling
Neil Sweeney
Sibling · 1940 · age 23
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Eleanor Sweeney
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 — 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-t0627-01668-00424)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Mary A. Scannell | 5 | daughter | — | Massachusetts |
| 2 | Frank Singler | 26 | head | Truck Driver | Massachusetts |
| 3 | Mary Singler | 25 | wife | — | Eire |
| 4 | Thomas Norton | 35 | head | Stock Man | Massachusetts |
| 5 | William Hagan | 45 | head | Painter | Massachusetts |
| 6 | Timothy S. Hagan | 22 | son | Clerk | New York |
| 7 | Francis J. Hagan | 50 | cousin | Supervisor | Massachusetts |
| 8 | Francis A. Hagan | 47 | cousin | Electrician | Massachusetts |
| 9 | Mary F. Sweeney | 52 | head | — | Massachusetts |
| 10 | Mary S. Sweeney THIS PERSON | 27 | daughter | Teacher | Massachusetts |
| 11 | Neil Sweeney | 23 | son | Usher | Massachusetts |
| 12 | Eleanor Sweeney | 21 | daughter | Operator | Massachusetts |
| 13 | Johanna Sweeney | 49 | sister | Bookkeeper | Massachusetts |
| 14 | Thomas Mcdonald | 49 | head | Laborer | Eire |
| 15 | Margaret Mcdonald | 41 | wife | — | Eire |
| 16 | John Mcdonald | 12 | son | — | Massachusetts |
| 17 | Bernadine Mcdonald | 9 | daughter | — | Massachusetts |
| 18 | Thomas Mcdonald | 5 | son | — | Massachusetts |
| 19 | Josephine Shannon | 55 | head | Housework | Eire |
| 20 | Mary Shannon | 24 | daughter | Sales Clerk | Massachusetts |
| 21 | John Shannon | 13 | son | — | Massachusetts |
| 22 | Joseph Mcavoy | 49 | head | Laborer | North Ireland |
| 23 | Catherine Mcavoy | 50 | wife | — | North Ireland |
| 24 | Patrick J. Mcavoy | 27 | son | Salesman | North Ireland |
| 25 | Theresa Mcavoy | 20 | daughter | Waitress | Scotland |
| 26 | Bernard Mcavoy | 17 | son | — | North Ireland |
| 27 | Margaret Mcavoy | 15 | daughter | — | Scotland |
| 28 | Helen Mcavoy | 11 | daughter | — | Massachusetts |
| 29 | Francis Mcavoy | 9 | son | — | Massachusetts |
| 30 | John Smyrnios | 60 | head | Salesman | Greece |
| 31 | Demetra Smyrnios | 40 | wife | — | Greece |
| 32 | James Mckenna | 37 | head | Truck Driver | Massachusetts |
| 33 | Ellen Mckenna | 32 | wife | — | Massachusetts |
| 34 | Gerard Mckenna | 14 | son | — | Massachusetts |
| 35 | Clare Mckenna | 11 | daughter | — | Massachusetts |
| 36 | John Hennesy | 77 | head | Stock Man | Maryland |
| 37 | Maybelle Wheeler | 46 | daughter | Seamstress | Massachusetts |
| 38 | Ruth E. Wheeler | 17 | granddaughter | — | Massachusetts |
| 39 | Ann Kelly | 26 | head | Seamstress | Massachusetts |
| 40 | Gertrude Dolan | 61 | head | Book Clerk | Massachusetts |
Pedigree Summary
Mary + 2 siblings
Gen 1 · 4 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)