MG
Mary Gibbons — 1940 US Census Record
Model Tree available1940 United States Federal Census · Suffolk-County, Massachusetts
Our Model Tree links this Mary Gibbons across the 1920, 1930 and 1940 US Censuses in Suffolk-County, Massachusetts (XGBoost, ~Confirmed), with identified parents Thomas & Margaret — first a daughter (b.~1918), then head of a 7-person household.
Age 22
b. ~1918
Female
Daughter
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Suffolk-County, Massachusetts |
| Surname | Gibbons |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston City |
| 1935 Residence (County) | Suffolk |
| Additional Details | |
| Occupation | Dental nurse |
| Industry | Doctor's office |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1000 |
| Highest Grade | H 4 |
| 1935 Residence | Same house |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Dental Nurse |
| Township / Ward | Boston City |
| Est. Birth Year | ~1918 |
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 Mary | Age | Birth yr |
|---|---|---|---|---|
| Dorothy Gibbons | Daughter | — | 19 | ~1921 |
| Alice Gibbons | Other | — | 26 | ~1914 |
| Richard Gibbons | Son | — | 13 | ~1927 |
| Francis Gibbons | Son | — | 18 | ~1922 |
| Mary Gibbons | Daughter | — | 22 | ~1918 |
| John Gibbons | Son | — | 21 | ~1919 |
| Margaret Gibbons | Head | — | 50 | ~1890 |
Census Appearances
1920
Suffolk, Massachusetts
Daughter, age 2
Suffolk, Massachusetts · implied b. ~1918 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Gibbons |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 2 |
| 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 12
Suffolk, Massachusetts · implied b. ~1918 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Gibbons |
| Given Name | Mary T |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| 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 22
Suffolk-County, Massachusetts · implied b. ~1918 — 7 household members
| Surname | Gibbons |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston City |
| 1935 Residence (County) | Suffolk |
| Occupation | Dental nurse |
| Industry | Doctor's office |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1000 |
| Highest Grade | H 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 Mary Gibbons across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Thomas Gibbons (~0.92 confidence) and mother Margaret Gibbons (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Thomas Gibbons
b. ~1885
Source father
● Household
· direct · ~0.92
Mother
Margaret Gibbons
b. ~1890
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Gibbons
Daughter · 1940 · age 22 · b. ~1918 · Massachusetts
★ You are viewing this record
Sibling
Francis Gibbons
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Richard Gibbons
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Dorothy Gibbons
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Gibbons
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-t0627-01682-00502)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Frederick Doherty | 57 | Head | Fireman | Massachusetts |
| 2 | Mrs Sarah Doherty | 56 | Wife | — | Massachusetts |
| 3 | Madeline Doherty | 25 | Daughter | Registrar | Massachusetts |
| 4 | Frederick Doherty | 22 | Son | New Worker | Massachusetts |
| 5 | Elizabeth Doherty | 18 | Daughter | New Worker | Massachusetts |
| 6 | Mrs Catherine Burke | 62 | Head | — | Eire |
| 7 | Catherine Burke | 30 | Daughter | Operator | Massachusetts |
| 8 | Loretta Burke | 28 | Daughter | Teacher | Massachusetts |
| 9 | Helena Burke | 26 | Daughter | Clerk | Massachusetts |
| 10 | Geraldine Burke | 24 | Daughter | Clerk | Massachusetts |
| 11 | Catherine Mcgovern | 53 | Head | Secretary | Massachusetts |
| 12 | Helen Mcgovern | 51 | Sister | — | Massachusetts |
| 13 | Patrick Mcgovern | 49 | Brother | Shipper | Massachusetts |
| 14 | Margaret Mcgovern | 42 | Sister | Dietitian | Massachusetts |
| 15 | Robert Mcgovern | 37 | Brother | Salesman | Massachusetts |
| 16 | Ernest E Roebling | 50 | Head | Agent | New York |
| 17 | Margaret Roebling | 54 | Sister | — | New York |
| 18 | Mrs Catherine Mcdonald | 38 | Head | Nurse | Canada-English |
| 19 | Ann Mcdonald | 9 | Daughter | — | Canada-English |
| 20 | Catherine Mcdonald | 7 | Daughter | — | Canada-English |
| 21 | Mrs Rita Howley | 28 | Lodger | Cooking | Canada-English |
| 22 | Douglas Howley | 12 | Lodger | — | Massachusetts |
| 23 | Mrs Rose Oneto | 73 | Lodger | — | Italy |
| 24 | Margaret Gibbons | 50 | Head | — | Ireland |
| 25 | Mary Gibbons THIS PERSON | 22 | Daughter | Dental Nurse | Massachusetts |
| 26 | John Gibbons | 21 | Son | New Worker | Massachusetts |
| 27 | Dorothy Gibbons | 19 | Daughter | New Worker | Massachusetts |
| 28 | Francis Gibbons | 18 | Son | New Worker | Massachusetts |
| 29 | Richard Gibbons | 13 | Son | — | Massachusetts |
| 30 | Alice Gibbons | 26 | Niece | Clerk | Massachusetts |
| 31 | Columbus B Kelly | 48 | Head | — | New York |
| 32 | Mrs Beatrice Kelly | 47 | Wife | — | New York |
| 33 | Mary Kelly | 18 | Daughter | New Worker | Massachusetts |
| 34 | Robert Kelly | 17 | Son | New Worker | Massachusetts |
| 35 | Joseph Kelly | 15 | Son | New Worker | Massachusetts |
| 36 | Margaret Kelly | 13 | Daughter | — | Massachusetts |
| 37 | Patrick J Sullivan | 60 | Head | Inspector | Ireland |
| 38 | Mrs Alice Sullivan | 60 | Wife | — | Massachusetts |
| 39 | Alice A Sullivan | 27 | Daughter | Stenographer | Massachusetts |
| 40 | Catherine Sullivan | 25 | Daughter | Stenographer | Massachusetts |
Pedigree Summary
Mary + 4 siblings
Gen 1 · 2 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)