TC
Thomas Carroll — 1940 US Census Record
Model Tree available1940 United States Federal Census · Middlesex-County, Massachusetts
Our Model Tree links this Thomas Carroll across the 1920, 1930 and 1940 US Censuses in Middlesex-County, Massachusetts (XGBoost, ~Confirmed), with identified parents Cornelius & Margaret — first a head (b.~1911), then head of a 4-person household.
Age 29
b. ~1911
Male
Head
Born: Massachusetts
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, Massachusetts |
| Surname | Carroll |
| Given Name | Thomas |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 29 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Lexington |
| 1935 Residence (County) | Middlesex |
| Additional Details | |
| Occupation | Caretaker |
| Industry | Private Estate |
| Class of Worker | PW |
| Hours Worked | 15 |
| Income (1939) | 1300 |
| Highest Grade | H 2 |
| 1935 Residence | Massachusetts |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Caretaker |
| Township / Ward | Bedford |
| Est. Birth Year | ~1911 |
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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Thomas | Age | Birth yr |
|---|---|---|---|---|
| Elizabeth Carroll | Daughter | — | 7 | ~1933 |
| Elizabeth Carroll | Spouse | — | 29 | ~1911 |
| Robert Carroll | Son | — | 3 | ~1937 |
| Thomas Carroll | Head | — | 29 | ~1911 |
Census Appearances
1920
Middlesex, Massachusetts
Son, age 8
Middlesex, Massachusetts · implied b. ~1912 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Carroll |
| Given Name | Thomas |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 8 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Ireland |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Middlesex, Massachusetts
Son, age 18
Middlesex, Massachusetts · implied b. ~1912 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Carroll |
| Given Name | Thomas J. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Northern Ireland |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Middlesex-County, Massachusetts
Head, age 29
Middlesex-County, Massachusetts · implied b. ~1911 — 4 household members
| Surname | Carroll |
| Given Name | Thomas |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 29 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Lexington |
| 1935 Residence (County) | Middlesex |
| Occupation | Caretaker |
| Industry | Private Estate |
| Class of Worker | PW |
| Hours Worked | 15 |
| Income (1939) | 1300 |
| Highest Grade | H 2 |
| 1935 Residence | Massachusetts |
| 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 Carroll across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Cornelius Carroll (~0.92 confidence) and mother Margaret Carroll (~0.92 confidence) and mother Margaret Carroll (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Cornelius Carroll
b. ~1878
Source father
● Household
· direct · ~0.92
Mother
Margaret Carroll
b. ~1881
Source mother
● Household
· direct · ~0.92
Mother
Margaret Carroll
b. ~1881
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Thomas Carroll
Head · 1940 · age 29 · b. ~1911 · Massachusetts
★ You are viewing this record
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-t0627-01602-00516)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Ralph S. Clark | 46 | Head | Attendant | Massachusetts |
| 42 | Florence S. Clark | 38 | Wife | — | Nova Scotia |
| 43 | Richard M. Gilman | 26 | Head | Spray Painter | Massachusetts |
| 44 | Katharine Gilman | 27 | Wife | — | Massachusetts |
| 45 | Francis E. Kelley | 48 | Head | Lawyer | Massachusetts |
| 46 | Catherine Ormond | 58 | Sister | Cashier | Massachusetts |
| 47 | Thomas Carroll THIS PERSON | 29 | Head | Caretaker | Massachusetts |
| 48 | Elizabeth Carroll | 29 | Wife | — | Massachusetts |
| 49 | Elizabeth Carroll | 7 | Daughter | — | Massachusetts |
| 50 | Robert Carroll | 3 | Son | — | Massachusetts |
| 51 | Arthur J. Binet | 47 | Head | Rubber | Massachusetts |
| 52 | Karen Binet | 45 | Wife | — | Denmark |
| 53 | John O. Binet | 24 | Son | Laborer | Massachusetts |
| 54 | Vernon Binet | 22 | Son | Lineman | Massachusetts |
| 55 | Roger Binet | 15 | Son | — | Massachusetts |
| 56 | Albert Binet | 11 | Son | — | Massachusetts |
| 57 | William Collins | 51 | Head | Machinist | Massachusetts |
| 58 | Margaret F. Collins | 32 | Wife | Housework | Massachusetts |
| 59 | William F. Collins | 8 | Son | — | Massachusetts |
| 60 | Raymond Malcolm | 14 | Stepson | — | Massachusetts |
| 61 | Gloria Malcolm | 13 | Stepdaughter | — | Massachusetts |
| 62 | Constance Elliott | 22 | Lodger | Housework | Massachusetts |
| 63 | Michael C. Cunningham | 50 | Head | Station Agent | New Hampshire |
| 64 | Mary Cunningham | 49 | Wife | — | Maine |
| 65 | John Cunningham | 17 | Son | — | Massachusetts |
| 66 | Mary T. Cunningham | 11 | Daughter | — | Massachusetts |
| 67 | Virginia Bachelor | 60 | Head | — | Nova Scotia |
| 68 | Charles O. Jr. Hunnewell | 29 | Head | Painter And Interior Decorator | Massachusetts |
| 69 | Alida Hunnewell | 27 | Wife | — | Massachusetts |
| 70 | Charles O. 3Rd Hunnewell | 4 | Son | — | Massachusetts |
| 71 | Alida Hunnewell | 2 | Daughter | — | Massachusetts |
| 72 | Mary K. Hunnewell | 1 | Daughter | — | Massachusetts |
| 73 | Thomas Murray | 23 | Head | Laundry Helper | Massachusetts |
| 74 | Hazel M. Murray | 19 | Wife | — | Massachusetts |
| 75 | Barbara A. Murray | 1 | Daughter | — | Massachusetts |
| 76 | Gunnar Hemmingson | 43 | Head | Mason | Sweden |
| 77 | Florence R. Hemmingson | 32 | Wife | — | Massachusetts |
| 78 | Gunnar Jr. Hemmingson | 13 | Son | Chauffeur | Massachusetts |
| 79 | Walter C. Hemmingson | 17 | Son | — | Massachusetts |
| 80 | Mary E. Hemmingson | 12 | Daughter | — | Massachusetts |
Pedigree Summary
Thomas
Gen 1 · 3 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)