TM
Thomas Mccarthy — 1940 US Census Record
Model Tree available1940 United States Federal Census · Suffolk-County, Massachusetts
Our Model Tree links this Thomas Mccarthy across the 1920, 1930 and 1940 US Censuses in Suffolk-County, Massachusetts (XGBoost, ~Confirmed), with identified parents Mary & Mary — first a son (b.~1914), then head of a 7-person household.
Age 26
b. ~1914
Male
Son
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Suffolk-County, Massachusetts |
| Surname | McCarthy |
| Given Name | Thomas |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 26 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (County) | Suffolk |
| Additional Details | |
| Occupation | Lithograph |
| Industry | PW |
| Class of Worker | 496 |
| Highest Grade | H 4 |
| 1935 Residence | 40 |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Lithograph |
| Township / Ward | Chelsea City |
| Est. Birth Year | ~1914 |
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 Thomas | Age | Birth yr |
|---|---|---|---|---|
| Mary Mccarthy | Head | — | 49 | ~1891 |
| Thomas Mccarthy | Son | — | 26 | ~1914 |
| Mary Mercier | Other | — | 35 | ~1905 |
| John Mercier | Other | — | 42 | ~1898 |
| Mary Mccarthy | Daughter | — | 20 | ~1920 |
| Mary Vaughan | Other | — | 71 | ~1869 |
| Victor Gallant | Other | — | 38 | ~1902 |
Census Appearances
1920
Suffolk, Massachusetts
Other, age 6
Suffolk, Massachusetts · implied b. ~1914 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McCarthy |
| Given Name | Thomas |
| Relationship to Head | Grandson |
| Sex | M |
| Color / Race | White |
| Age | 6 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Occupation | none |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Suffolk, Massachusetts
Son, age 16
Suffolk, Massachusetts · implied b. ~1914 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McCarthy |
| Given Name | Thomas |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 16 |
| 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
Son, age 26
Suffolk-County, Massachusetts · implied b. ~1914 — 7 household members
| Surname | McCarthy |
| Given Name | Thomas |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 26 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (County) | Suffolk |
| Occupation | Lithograph |
| Industry | PW |
| Class of Worker | 496 |
| Highest Grade | H 4 |
| 1935 Residence | 40 |
| 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 Thomas Mccarthy across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Mary Mccarthy (~0.92 confidence) and mother Mary Mccarthy (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Mary Mccarthy
b. ~1885
Source mother
● Household
· direct · ~0.92
Mother
Mary Mccarthy
b. ~1891
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Thomas Mccarthy
Son · 1940 · age 26 · b. ~1914 · Massachusetts
★ You are viewing this record
Sibling
Mary Mccarthy
Sibling · 1940 · age 20
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-t0627-01641-00542)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Paul Sleansky | 7 | Son | — | Massachusetts |
| 42 | Thomas Sleansky | 3 | Son | — | Massachusetts |
| 43 | John Moore | 30 | Head | Building | Massachusetts |
| 44 | Helen Moore | 29 | Wife | — | Massachusetts |
| 45 | Mary Moore | 1 | Daughter | — | Massachusetts |
| 46 | Michael Crowley | 40 | Head | Building | Massachusetts |
| 47 | Margaret Crowley | 38 | Wife | — | Massachusetts |
| 48 | Mary Mccarthy | 49 | Head | — | Scotland |
| 49 | Thomas Mccarthy THIS PERSON | 26 | Son | Lithograph | Massachusetts |
| 50 | Mary Mccarthy | 20 | Daughter | Pw | Scotland |
| 51 | Mary Vaughan | 71 | Lodger | — | England |
| 52 | Victor Gallant | 38 | Lodger | Pw | Canada |
| 53 | John Mercier | 42 | Lodger | Building | Massachusetts |
| 54 | Mary Mercier | 35 | Lodger | — | Massachusetts |
| 55 | Charles Patrick | 65 | Head | — | France |
| 56 | Justine Patrick | 64 | Wife | — | France |
| 57 | Joseph Hodgkins | 53 | Head | Water | Massachusetts |
| 58 | Susan Hodgkins | 41 | Wife | — | Massachusetts |
| 59 | Dorothy Hodgkins | 15 | Daughter | — | Massachusetts |
| 60 | Alice Hodgkins | 13 | Daughter | — | Massachusetts |
| 61 | Richard Hodgkins | 11 | Son | — | Massachusetts |
| 62 | Mabel Lewis | 33 | Lodger | Sewing | Massachusetts |
| 63 | Lillian Gross | 26 | Lodger | — | Massachusetts |
| 64 | Patricia Gross | 1 | Lodger | — | Massachusetts |
| 65 | Mary Josovich | 68 | Wife | — | Austria |
| 66 | Walter Josovich | 55 | Head | — | Massachusetts |
| 67 | Joseph Smith | 21 | Head | Wood | Massachusetts |
| 68 | Anna Smith | 21 | Wife | Shoe Factory | Maine |
| 69 | Margaret Smith | 2 | Daughter | — | Massachusetts |
| 70 | Ruth Smith | 18 | Daughter | Real Estate | Massachusetts |
| 71 | Paul Smith | 16 | Son | — | Massachusetts |
| 72 | Walter Smith | 13 | Son | — | Massachusetts |
| 73 | Morris Adams | 23 | Son | Garage | Maine |
| 74 | Mary Adams | 26 | Daughter | — | Maine |
| 75 | Maureen Adams | 2 | Grand-daughter | — | Massachusetts |
| 76 | Edward Adams | 2 | Grandson | — | Massachusetts |
| 77 | Rosalie Adams | 1 | Grand-daughter | — | Massachusetts |
| 78 | Sarah Mcbride | 67 | Head | — | Massachusetts |
| 79 | Frank Dooley | 50 | Head | — | Poland |
| 80 | Dooley | 50 | Wife | Building | Massachusetts |
Pedigree Summary
Thomas + 1 sibling
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)