TM
Thomas Martin — 1940 US Census Record
Model Tree available1940 United States Federal Census · Middlesex-County, Massachusetts
Our Model Tree links this Thomas Martin across the 1920, 1930 and 1940 US Censuses in Middlesex-County, Massachusetts (XGBoost, ~Confirmed), with identified parents Thomas & Catherine — first a son (b.~1918), then head of a 11-person household.
Age 22
b. ~1918
Male
Son
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, Massachusetts |
| Surname | Martin |
| Given Name | Thomas J. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Somerville City |
| 1935 Residence (County) | Middlesex |
| Additional Details | |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | Somerville 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.
11 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Thomas | Age | Birth yr |
|---|---|---|---|---|
| Gail Martin | Daughter | — | 13 | ~1927 |
| Mary Martin | Daughter | — | 17 | ~1923 |
| Dorothy Martin | Daughter | — | 10 | ~1930 |
| Mary Martin | Daughter | — | 23 | ~1917 |
| Thomas Martin | Head | — | 49 | ~1891 |
| Thomas Martin | Son | — | 22 | ~1918 |
| William Martin | Son | — | 11 | ~1929 |
| Robert Martin | Son | — | 5 | ~1935 |
| Vincent Martin | Son | — | 18 | ~1922 |
| Edward Martin | Son | — | 16 | ~1924 |
| Catherine Martin | Spouse | — | 49 | ~1891 |
Census Appearances
1920
Middlesex, Massachusetts
Son, age 2
Middlesex, Massachusetts · implied b. ~1918 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Martin |
| Given Name | Thomas B |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | England |
| Mother's Birthplace | England |
| Speaks English | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Middlesex, Massachusetts
Son, age 12
Middlesex, Massachusetts · implied b. ~1918 — 11 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Martin |
| Given Name | Thomas |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | England |
| Mother's Birthplace | England |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Middlesex-County, Massachusetts
Son, age 22
Middlesex-County, Massachusetts · implied b. ~1918 — 11 household members
| Surname | Martin |
| Given Name | Thomas J. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Somerville City |
| 1935 Residence (County) | Middlesex |
| 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 Martin across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Thomas Martin (~0.92 confidence) and mother Catherine Martin (~0.92 confidence) and father Thomas Martin (~0.92 confidence) and mother Caroline Martin (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Thomas Martin
b. ~1891
Source father
● Household
· direct · ~0.92
Mother
Catherine Martin
b. ~1891
Source mother
● Household
· direct · ~0.92
Father
Thomas Martin
b. ~1892
Source father
● Household
· direct · ~0.92
Mother
Caroline Martin
b. ~1893
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Thomas Martin
Son · 1940 · age 22 · b. ~1918 · Massachusetts
★ You are viewing this record
Sibling
Dorothy Martin
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Martin
Sibling · 1940 · age 23
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Edward Martin
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Martin
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Martin
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Vincent Martin
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Gail Martin
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Martin
Sibling · 1940 · age 11
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 — 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-t0627-01703-00266)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Patrick Doolin | 60 | Head | Policeman | Eire |
| 2 | Margaret Doolin | 59 | Wife | — | Eire |
| 3 | Esther Doolin | 27 | Daughter | School Teacher | Massachusetts |
| 4 | James Doolin | 24 | Son | — | Massachusetts |
| 5 | Lillian Doolin | 20 | Daughter | — | Massachusetts |
| 6 | Mary Doolin | 15 | Daughter | — | Massachusetts |
| 7 | Mary O. Haley | 75 | Head | — | Massachusetts |
| 8 | Margaret Haley | 88 | Sister | Income Tax Office | Massachusetts |
| 9 | Walter Willwerth | 46 | Head | Accountant | Massachusetts |
| 10 | Elizabeth Willwerth | 46 | Wife | — | Massachusetts |
| 11 | Walter J. Willwerth | 21 | Son | Clerk | Massachusetts |
| 12 | Edward Willwerth | 20 | Son | — | Massachusetts |
| 13 | Sarah Willwerth | 18 | Daughter | Clerk Office | Massachusetts |
| 14 | Charles Willwerth | 14 | Son | — | Massachusetts |
| 15 | Robert Willwerth | 13 | Son | — | Massachusetts |
| 16 | Natalie Willwerth | 9 | Daughter | — | Massachusetts |
| 17 | Joseph Willwerth | 4 | Son | — | Massachusetts |
| 18 | Kay Edral | 82 | Lodger | — | Newfoundland |
| 19 | Irving Taylor | 58 | Head | Insurance Man | Massachusetts |
| 20 | Mary E. Taylor | 57 | Wife | — | Massachusetts |
| 21 | Thomas Martin | 49 | Head | U. S. Mail | Massachusetts |
| 22 | Catherine Martin | 49 | Wife | — | Massachusetts |
| 23 | Mary Martin | 23 | Daughter | — | Massachusetts |
| 24 | Thomas J. Martin THIS PERSON | 22 | Son | — | Massachusetts |
| 25 | Vincent Martin | 18 | Son | — | Massachusetts |
| 26 | Mary Martin | 17 | Daughter | — | Massachusetts |
| 27 | Edward Martin | 16 | Son | — | Massachusetts |
| 28 | Gail Martin | 13 | Daughter | — | Massachusetts |
| 29 | William Martin | 11 | Son | — | Massachusetts |
| 30 | Dorothy Martin | 10 | Daughter | — | Massachusetts |
| 31 | Robert Martin | 5 | Son | — | Massachusetts |
| 32 | Patrick Delmar | 51 | Head | Janitor | Massachusetts |
| 33 | Mary Delmar | 46 | Wife | — | Massachusetts |
| 34 | Thomas Delmar | 21 | Son | Mechanic | Massachusetts |
| 35 | Estelle Delmar | 20 | Daughter | Office Work | Massachusetts |
| 36 | Robert Delmar | 17 | Son | — | Massachusetts |
| 37 | Redmond Delmar | 14 | Son | — | Massachusetts |
| 38 | Barbara Delmar | 13 | Daughter | — | Massachusetts |
| 39 | John Delmar | 5 | Son | — | Massachusetts |
| 40 | Frank Donovan | 38 | Brother | Janitor | Massachusetts |
Related Census Records
Pedigree Summary
Thomas + 8 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)