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Mary Mclaughlin — 1940 US Census Record
Model Tree available1940 United States Federal Census · Suffolk-County, Massachusetts
Our Model Tree links this Mary Mclaughlin across the 1920, 1930 and 1940 US Censuses in Suffolk-County, Massachusetts (XGBoost, ~Confirmed), with identified parents George & Edgar — first a daughter (b.~1918), then head of a 5-person household.
Age 22
b. ~1918
Female
Daughter
Born: Massachusetts
Separated
1940 Census Record Details
| Census Year | 1940 |
| Location | Suffolk-County, Massachusetts |
| Surname | McLaughlin |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 22 |
| Marital Status | Separated |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston city |
| 1935 Residence (County) | Suffolk |
| Additional Details | |
| Occupation | Machine Operator |
| Industry | Federal Govmt |
| Class of Worker | GW |
| Hours Worked | 40 |
| Income (1939) | 256 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Machine Operator |
| 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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Helen Mclaughlin | Daughter | — | 19 | ~1921 |
| Margaret Mclaughlin | Daughter | — | 21 | ~1919 |
| Mary Mclaughlin | Daughter | — | 22 | ~1918 |
| Julia Kelly | Head | — | 52 | ~1888 |
| John Kelly | Son | — | 16 | ~1924 |
Census Appearances
1920
Suffolk, Massachusetts
Daughter, age 1
Suffolk, Massachusetts · implied b. ~1919 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McLaughlin |
| Given Name | Mary E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 1 |
| 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 11
Suffolk, Massachusetts · implied b. ~1919 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mc Laughlin |
| Given Name | Mary E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| 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 — 5 household members
| Surname | McLaughlin |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 22 |
| Marital Status | Separated |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston city |
| 1935 Residence (County) | Suffolk |
| Occupation | Machine Operator |
| Industry | Federal Govmt |
| Class of Worker | GW |
| Hours Worked | 40 |
| Income (1939) | 256 |
| 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 Mary Mclaughlin across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father George Mc Laughlin (~0.92 confidence) and father Edgar Mclaughlin (~0.92 confidence) and mother Julia Kelly (~0.92 confidence) and mother Helen Mclaughlin (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
George Mc Laughlin
b. ~1877
Source father
● Household
· direct · ~0.92
Father
Edgar Mclaughlin
b. ~1884
Source father
● Household
· direct · ~0.92
Mother
Julia Kelly
b. ~1888
Source mother
● Household
· direct · ~0.92
Mother
Helen Mclaughlin
b. ~1895
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Mclaughlin
Daughter · 1940 · age 22 · b. ~1918 · Massachusetts
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Sibling
Margaret Mclaughlin
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Kelly
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Helen Mclaughlin
Sibling · 1940 · age 19
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-t0627-01659-00297)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Thomas Kehoe | 47 | Head | Longshoreman | Massachusetts |
| 2 | Margaret Kehoe | 42 | Wife | — | Massachusetts |
| 3 | Agnes Burns | 40 | Head | — | Massachusetts |
| 4 | William Burns | 17 | Son | — | Massachusetts |
| 5 | Clyde Burns | 14 | Son | — | Massachusetts |
| 6 | Margaret Burns | 13 | Daughter | — | Massachusetts |
| 7 | Philip Chambers | 70 | Head | — | Massachusetts |
| 8 | Margaret Chambers | 63 | Wife | — | Massachusetts |
| 9 | Mildred Chambers | 25 | Daughter | Salesgirl | Massachusetts |
| 10 | Francis Chambers | 26 | Son | Mechanic | Massachusetts |
| 11 | William Mcgrath | 55 | Head | Domestic | Massachusetts |
| 12 | Margaret Mcgrath | 48 | Wife | — | Massachusetts |
| 13 | James Mcgrath | 18 | Son | — | Massachusetts |
| 14 | Mary Mcgrath | 14 | Daughter | — | Massachusetts |
| 15 | Theresa Mcgrath | 12 | Daughter | — | Massachusetts |
| 16 | Gertrude Mcgrath | 10 | Daughter | — | Massachusetts |
| 17 | Francis Mcgrath | 8 | Son | — | Massachusetts |
| 18 | Rosetta Upton | 42 | Head | Clerk Typist | Massachusetts |
| 19 | John Upton | 25 | Son | General Work | Massachusetts |
| 20 | John T Daly | 47 | Son-in-law | Window Cleaner | Massachusetts |
| 21 | Lola Daly | 38 | Wife | — | Australia |
| 22 | Lola Daly | 17 | Daughter | New Worker | Massachusetts |
| 23 | John F Daly | 25 | Son | — | Massachusetts |
| 24 | Edward T Daly | 16 | Son | — | Massachusetts |
| 25 | Julia Kelly | 52 | Head | — | Massachusetts |
| 26 | Mary Mclaughlin THIS PERSON | 22 | Daughter | Machine Operator | Massachusetts |
| 27 | Margaret Mclaughlin | 21 | Daughter | Clerical Clerk | Massachusetts |
| 28 | Helen Mclaughlin | 19 | Daughter | New Worker | Massachusetts |
| 29 | John Kelly | 16 | Son | — | Eire |
| 30 | Sarah Mcgrath | 70 | Head | — | Massachusetts |
| 31 | George Mcgrath | 30 | Son | — | Massachusetts |
| 32 | Fredrick Cassell | 41 | Head | Chauffeur | Massachusetts |
| 33 | Catherine Cassell | 44 | Wife | — | Massachusetts |
| 34 | Mary E Cassell | 20 | Daughter | Bundler-Wrapper | Massachusetts |
| 35 | Elizabeth Connors | 70 | Head | — | Eire |
| 36 | Edward Connors | 40 | Son | Welder | Massachusetts |
| 37 | John Geary | 33 | Head | Milkman | Massachusetts |
| 38 | Catherine Geary | 33 | Wife | — | Massachusetts |
| 39 | Sarah Macintosh | 65 | Wife | — | Northern Ireland |
| 40 | John Macintosh | 38 | Head | — | Massachusetts |
Pedigree Summary
Mary + 3 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)