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Thomas Black — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Middlesex-County, Massachusetts
Our Model Tree links this Thomas Black across the 1930 and 1940 US Censuses in Middlesex-County, Massachusetts (XGBoost, ~Confirmed) — first a head (b.~1899), then head of a 7-person household.
Age 41
b. ~1899
Male
Head
Born: Massachusetts
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, Massachusetts |
| Surname | Black |
| Given Name | Thomas |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 41 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Cambridge |
| 1935 Residence (County) | Middlesex |
| Additional Details | |
| Occupation | Plumbing & Heating |
| Industry | Own |
| Class of Worker | OA |
| Hours Worked | 40 |
| Income (1939) | 222 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Plumbing & Heating |
| Township / Ward | Cambridge |
| Est. Birth Year | ~1899 |
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 |
|---|---|---|---|---|
| John Black | Son | — | 5 | ~1935 |
| Thomas Black | Head | — | 41 | ~1899 |
| Thomas Black | Son | — | 16 | ~1924 |
| Dorothea Black | Daughter | — | 12 | ~1928 |
| Jayne Black | Daughter | — | 7 | ~1933 |
| Dorothy Black | Spouse | — | 41 | ~1899 |
| Paul Black | Son | — | 18 | ~1922 |
Census Appearances
1930
Middlesex, Massachusetts
Head, age 31
Middlesex, Massachusetts · implied b. ~1899 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Black |
| Given Name | Thomas J |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 31 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| Age at First Marriage | 21 |
| Father's Birthplace | Canada English |
| Mother's Birthplace | Canada English |
| Occupation | Pipe Cutter |
| Industry | Plumbing Supply |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 18.00 |
| Radio Set | R |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Middlesex-County, Massachusetts
Head, age 41
Middlesex-County, Massachusetts · implied b. ~1899 — 7 household members
| Surname | Black |
| Given Name | Thomas |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 41 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Cambridge |
| 1935 Residence (County) | Middlesex |
| Occupation | Plumbing & Heating |
| Industry | Own |
| Class of Worker | OA |
| Hours Worked | 40 |
| Income (1939) | 222 |
| Highest Grade | Hs 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 Thomas Black across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Thomas Black
Head · 1940 · age 41 · b. ~1899 · Massachusetts
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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-t0627-01685-00133)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Thomas Black THIS PERSON | 41 | Head | Plumbing & Heating | Massachusetts |
| 42 | Dorothy Black | 41 | Wife | — | Canada-Eng |
| 43 | Paul Black | 18 | Son | Presser | Massachusetts |
| 44 | Thomas Black | 16 | Son | — | Massachusetts |
| 45 | Dorothea Black | 12 | Daughter | — | Massachusetts |
| 46 | Jayne Black | 7 | Daughter | — | Massachusetts |
| 47 | John Black | 5 | Son | — | Massachusetts |
| 48 | Frederick Henderson | 43 | Head | Foreman | Canada-Eng |
| 49 | Beatrice Henderson | 43 | Wife | — | Canada-Eng |
| 50 | Roger Henderson | 15 | Son | — | Canada-Eng |
| 51 | Anthony Sousa | 57 | Head | Laborer | Portugal |
| 52 | Mary Sousa | 51 | Wife | — | Portugal |
| 53 | Olga Sousa | 21 | Daughter | Clerical | Massachusetts |
| 54 | Philip Masturich | 27 | Head | Mechanic | Poland |
| 55 | Anna Masturich | 21 | Wife | Packing | Poland |
| 56 | Max Lubin | 35 | Head | Clerical | Russia |
| 57 | Martha Lubin | 30 | Wife | — | New York |
| 58 | Lois Lubin | 10 | Daughter | — | Massachusetts |
| 59 | Frederick Lubin | 7 | Son | — | Massachusetts |
| 60 | Kenneth Smith | 24 | Head | U.S. Weather Bureau | Pennsylvania |
| 61 | Bertha Smith | 19 | Wife | — | Oregon |
| 62 | Infant Smith | 0 | Son | — | Massachusetts |
| 63 | John T. Stymiest | 28 | Head | — | Massachusetts |
| 64 | Eleanor Stymiest | 27 | Wife | Nurse | Michigan |
| 65 | Marcia Stymiest | 3 | Daughter | — | Massachusetts |
| 66 | Dorothy Doughty | 30 | Head | Saleswoman | Massachusetts |
| 67 | Robert Doughty | 8 | Son | — | Massachusetts |
| 68 | Barbara Doughty | 11 | Daughter | — | Massachusetts |
| 69 | Harry Compton | 23 | Brother | Laborer | Massachusetts |
| 70 | Julio Perry | 46 | Head | Laborer | Portugal |
| 71 | Julia Perry | 37 | Wife | — | Portugal |
| 72 | Hilda Perry | 17 | Daughter | — | Massachusetts |
| 73 | Agnes Perry | 12 | Daughter | — | Massachusetts |
| 74 | Arter Perry | 8 | Daughter | — | Massachusetts |
| 75 | Rose Roch | 48 | Head | — | Massachusetts |
| 76 | Joseph Roch | 22 | Son | Laborer | Massachusetts |
| 77 | Rose Roch | 18 | Daughter | Clerical | Massachusetts |
| 78 | Dorothy Roch | 15 | Daughter | — | Massachusetts |
| 79 | Charles Wilson | 31 | Head | Compressor Operator | Scotland |
| 80 | Janet Wilson | 30 | Wife | — | Scotland |
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)