WT
William Thomas — 1940 US Census Record
Model Tree available1940 United States Federal Census · Middlesex-County, Massachusetts
Our Model Tree links this William Thomas across the 1910, 1920, 1930 and 1940 US Censuses in Middlesex-County, Massachusetts (XGBoost, ~Confirmed), with identified parents William & William — first a head (b.~1905), then head of a 3-person household.
Age 35
b. ~1905
Male
Head
Born: Massachusetts
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, Massachusetts |
| Surname | Thomas |
| Given Name | William |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 35 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Medford City |
| 1935 Residence (County) | Middlesex |
| Additional Details | |
| Occupation | Painter |
| Industry | House Painting |
| Class of Worker | OA |
| Hours Worked | 40 |
| Income (1939) | 340 |
| Highest Grade | No 2 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Painter |
| Township / Ward | Medford City |
| Est. Birth Year | ~1905 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| William Thomas | Head | — | 35 | ~1905 |
| Edward Thomas | Son | — | 3 | ~1937 |
| Mary Thomas | Spouse | — | 33 | ~1907 |
Census Appearances
1910
Middlesex, Massachusetts
Son, age
Middlesex, Massachusetts · implied b. ~1910 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thomas |
| Given Name | William H Jr |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 0 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1920
Middlesex, Massachusetts
Son, age 11
Middlesex, Massachusetts · implied b. ~1909 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thomas |
| Given Name | William H. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Can Read | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Middlesex, Massachusetts
Son, age 20
Middlesex, Massachusetts · implied b. ~1910 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thomas |
| Given Name | William Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Occupation | Helper |
| Industry | Trucking |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Middlesex-County, Massachusetts
Head, age 35
Middlesex-County, Massachusetts · implied b. ~1905 — 3 household members
| Surname | Thomas |
| Given Name | William |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 35 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Medford City |
| 1935 Residence (County) | Middlesex |
| Occupation | Painter |
| Industry | House Painting |
| Class of Worker | OA |
| Hours Worked | 40 |
| Income (1939) | 340 |
| Highest Grade | No 2 |
| 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 William Thomas across 4 US Census years (1910, 1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father William Thomas (~0.92 confidence) and father William Thomas (~0.92 confidence) and mother Ida Thomas (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
William Thomas
b. ~1882
Source father
● Household
· direct · ~0.92
Father
William Thomas
b. ~1882
Source father
● Household
· direct · ~0.92
Mother
Ida Thomas
b. ~1889
Source mother
● Household
· direct · ~0.92
This person
Anchor record
William Thomas
Head · 1940 · age 35 · b. ~1905 · 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-t0627-01611-00387)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Robert W. Nauss | 57 | Head | Laborer | Canada English |
| 2 | Gertrude Nauss | 59 | Wife | — | Canada English |
| 3 | Robert Nauss | 23 | Son | Laborer | Massachusetts |
| 4 | Gertrude Nauss | 18 | Daughter | — | Massachusetts |
| 5 | Paul D. Colby | 29 | Head | Radio Engineer | New Hampshire |
| 6 | Edith Colby | 27 | Wife | — | Massachusetts |
| 7 | Robert Colby | 3 | Son | — | Massachusetts |
| 8 | Bernice M. Bogue | 50 | Head | — | Massachusetts |
| 9 | Verne Bogue | 21 | Daughter | Waitress | Chicago |
| 10 | Grace Bogue | 17 | Daughter | — | Massachusetts |
| 11 | Stephen Bogue | 10 | Son | — | Washington |
| 12 | Anthony Mclaughlin | 35 | Head | Painter | Massachusetts |
| 13 | Margaret Mclaughlin | 35 | Wife | — | Massachusetts |
| 14 | Joseph Mclaughlin | 2 | Son | — | Massachusetts |
| 15 | James Mclaughlin | 1 | Son | — | Massachusetts |
| 16 | John Byrne | 36 | Head | Laborer | Massachusetts |
| 17 | Anna Byrne | 32 | Wife | — | Massachusetts |
| 18 | John F. Byrne | 8 | Son | — | Massachusetts |
| 19 | Mary Byrne | 6 | Daughter | — | Massachusetts |
| 20 | Thomas Byrne | 0 | Son | — | Massachusetts |
| 21 | Henry Hooke | 40 | Head | Laborer | Massachusetts |
| 22 | Ruth G. Hooke | 32 | Wife | — | Massachusetts |
| 23 | John Hooke | 14 | Son | — | Massachusetts |
| 24 | Scott Hooke | 12 | Son | — | Massachusetts |
| 25 | Patrick Mchugh | 46 | Head | Laborer | Irish Free State |
| 26 | Mary Mchugh | 46 | Wife | — | Massachusetts |
| 27 | Patrick J. Mchugh | 14 | Son | — | Massachusetts |
| 28 | John J. Mchugh | 13 | Son | — | Massachusetts |
| 29 | Margaret Brennan | 56 | Head | — | Massachusetts |
| 30 | William Brennan | 30 | Son | — | Massachusetts |
| 31 | James Brennan | 21 | Son | Tree Surgeon | Massachusetts |
| 32 | William Thomas THIS PERSON | 35 | Head | Painter | Massachusetts |
| 33 | Mary E. Thomas | 33 | Wife | — | Massachusetts |
| 34 | Edward Thomas | 3 | Son | — | Massachusetts |
| 35 | Frank Celine | 28 | Head | Spray Painter | Massachusetts |
| 36 | Agnes Q. Celine | 26 | Wife | — | Massachusetts |
| 37 | Joseph Servello | 35 | Head | Carpenter | Italy |
| 38 | Alba A. Servello | 35 | Wife | — | Italy |
| 39 | Joseph Servello | 11 | Son | — | Massachusetts |
| 40 | Bridget Servello | 13 | Daughter | — | Massachusetts |
Related Census Records
Pedigree Summary
William
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)