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Mary Thomas — 1940 US Census Record
Model Tree available1940 United States Federal Census · Essex-County, Massachusetts
Our Model Tree links this Mary Thomas across the 1920, 1930 and 1940 US Censuses in Essex-County, Massachusetts (XGBoost, ~Confirmed), with identified parents Charles & Charles — first a daughter (b.~1903), then head of a 7-person household.
Age 37
b. ~1903
Female
Daughter
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Essex-County, Massachusetts |
| Surname | Thomas |
| Given Name | Mary F. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 37 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Beverly City |
| 1935 Residence (County) | Essex |
| Additional Details | |
| Occupation | Buffing |
| Industry | Machinery Plant |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1040 |
| Highest Grade | H 4 |
| 1935 Residence | Same Place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Buffing |
| Township / Ward | Beverly City |
| Est. Birth Year | ~1903 |
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 Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Thomas | Daughter | — | 37 | ~1903 |
| Katherine Thomas | Daughter | — | 35 | ~1905 |
| Charles Thomas | Head | — | 72 | ~1868 |
| George Thomas | Son | — | 25 | ~1915 |
| Walter Thomas | Son | — | 21 | ~1919 |
| William Thomas | Son | — | 27 | ~1913 |
| Mary Thomas | Spouse | — | 66 | ~1874 |
Census Appearances
1920
Essex, Massachusetts
Daughter, age 16
Essex, Massachusetts · implied b. ~1904 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thomas |
| Given Name | Mary F. |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Canada |
| Occupation | Shoe factory |
| Industry | w |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Essex, Massachusetts
Daughter, age 26
Essex, Massachusetts · implied b. ~1904 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thomas |
| Given Name | Mary F |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 26 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Canada English |
| Occupation | Buffer |
| Industry | Shoe Shop |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Essex-County, Massachusetts
Daughter, age 37
Essex-County, Massachusetts · implied b. ~1903 — 7 household members
| Surname | Thomas |
| Given Name | Mary F. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 37 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Beverly City |
| 1935 Residence (County) | Essex |
| Occupation | Buffing |
| Industry | Machinery Plant |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1040 |
| Highest Grade | H 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 Mary Thomas across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Charles Thomas (~0.92 confidence) and father Charles Thomas (~0.92 confidence) and mother Grace Thomas (~0.92 confidence) and mother Mary Thomas (~0.92 confidence) and mother Mary Thomas (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Charles Thomas
b. ~1869
Source father
● Household
· direct · ~0.92
Father
Charles Thomas
b. ~1863
Source father
● Household
· direct · ~0.92
Mother
Grace Thomas
b. ~1873
Source mother
● Household
· direct · ~0.92
Mother
Mary Thomas
b. ~1874
Source mother
● Household
· direct · ~0.92
Mother
Mary Thomas
b. ~1872
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Thomas
Daughter · 1940 · age 37 · b. ~1903 · Massachusetts
★ You are viewing this record
Sibling
George Thomas
Sibling · 1940 · age 25
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Thomas
Sibling · 1940 · age 27
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Walter Thomas
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Katherine Thomas
Sibling · 1940 · age 35
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 — Essex-County, Massachusetts
Open full size
1940 US Federal Census — Essex-County, Massachusetts
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01578-00097)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Elmira Burnham | 80 | Aunt | — | Massachusetts |
| 2 | Charles Thomas | 72 | Head | — | Massachusetts |
| 3 | Mary E. Thomas | 66 | Wife | — | Canada-English |
| 4 | William C. Thomas | 27 | Son | Machine Operator | Massachusetts |
| 5 | George S. Thomas | 25 | Son | Odd Jobs | Massachusetts |
| 6 | Walter E. Thomas | 21 | Son | — | Massachusetts |
| 7 | Mary F. Thomas THIS PERSON | 37 | Daughter | Buffing | Massachusetts |
| 8 | Katherine C. Thomas | 35 | Daughter | Machine Operator | Massachusetts |
| 9 | Russell Magnuson | 34 | Head | Toy Mender | Massachusetts |
| 10 | Palmeda Magnuson | 27 | Wife | — | Rhode Island |
| 11 | Cary Magnuson | 4 | Son | — | Massachusetts |
| 12 | Harold Magnuson | 1 | Son | — | Massachusetts |
| 13 | Wilfred Lafleur | 48 | Head | Baker | Canada-French |
| 14 | Bertha Lafleur | 46 | Wife | — | Canada-French |
| 15 | Agnes Page | 62 | Head | — | Italy |
| 16 | Jerimah Harrington | 79 | Lodger | — | New Hampshire |
| 17 | Ralph Archung | 35 | Head | Machinist | Massachusetts |
| 18 | Barbara Archung | 23 | Wife | — | Massachusetts |
| 19 | Ralph Jr. Archung | 5 | Son | — | Massachusetts |
| 20 | Henry Borghi | 78 | Head | — | Italy |
| 21 | Beatrice Borghi | 74 | Wife | — | Italy |
| 22 | Walter J. Richards | 27 | Head | Truck Driver | Canada-English |
| 23 | Barbara Richards | 23 | Wife | — | Massachusetts |
| 24 | Judith Ann Richards | 1 | Daughter | — | Massachusetts |
| 25 | Dave E. Kennedy | 46 | Head | — | Massachusetts |
| 26 | John Kennedy | 3 | Lodger | — | Massachusetts |
| 27 | Jerome Kennedy | 6 | Son | — | Massachusetts |
| 28 | Irene Kennedy | 17 | Daughter | 10 | New York |
| 29 | Arthur P. Hendrix | 42 | Head | Shoe Worker | Canada-English |
| 30 | Florence Hendrix | 36 | Wife | Shoe Worker | Canada-English |
| 31 | Joyce Hendrix | 8 | Daughter | — | Massachusetts |
| 32 | Grace Marisey | 43 | Head | Labolady | Massachusetts |
| 33 | Alma Marisey | 27 | Sister | Labolady | Massachusetts |
| 34 | Mayle Marisey | 34 | Sister | — | Massachusetts |
| 35 | Arthur Isadore | 33 | Head | Contractor | Massachusetts |
| 36 | Roberta Isadore | 22 | Wife | — | Massachusetts |
| 37 | Isale Isadore | 1 | Daughter | — | Massachusetts |
| 38 | Omer Chenard | 26 | Head | Shoe Worker | Massachusetts |
| 39 | Barbara Chenard | 19 | Wife | — | Massachusetts |
| 40 | Robert Chenard | 0 | Son | — | Massachusetts |
Pedigree Summary
Mary + 4 siblings
Gen 1 · 5 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)