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Mary Tobin — 1940 US Census Record

Linked across censuses

1940 United States Federal Census · Middlesex-County, Massachusetts

Our Model Tree links this Mary Tobin across the 1930 and 1940 US Censuses in Middlesex-County, Massachusetts (XGBoost, ~Confirmed) — first a daughter (b.~1911), then head of a 12-person household.

Age 29 b. ~1911 Female Daughter Born: Newfoundland Single

1940 Census Record Details

Census Year1940
LocationMiddlesex-County, Massachusetts
SurnameTobin
Given NameMary G
Relationship to HeadDaughter
SexF
Color / RaceWhite
Age29
Marital StatusSingle
BirthplaceNewfoundland
1935 Residence (City)Melrose
1935 Residence (County)Middlesex
Naturalization StatusAlien
Additional Details
OccupationMach Operator
IndustryOcc Shoe Factory
Class of WorkerPW
Hours Worked40
Income (1939)996
Highest GradeNo H4
1935 ResidenceSame Place
Birth CountryCanada
Birthplace (normalized)newfoundland
OccupationMach Operator
Township / WardMelrose
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.

12 people recorded at the same address in the 1940 census.

Name Relation to head Relative to Mary Age Birth yr
Gertrude Tobin Daughter — 18 ~1922
Marjorie Berling Other — 25 ~1915
Wesley Dean Other — 25 ~1915
Angela Tobin Daughter — 28 ~1912
Ferdinand Almy Other — 78 ~1862
Margaret Tobin Daughter — 27 ~1913
Raymond Tobin Son — 22 ~1918
Bertha Tobin Daughter — 15 ~1925
Mary Tobin Daughter — 29 ~1911
Zoie Le Blanc Head — 33 ~1907
Thomas Tobin Son — 25 ~1915
Constance Prendagast Daughter — 9 ~1931

Census Appearances

1930
Middlesex, Massachusetts
Daughter, age 19
Middlesex, Massachusetts · implied b. ~1911 — 9 household members
●  Primary link · ~Confirmed · 2 sources
XGBoost Household
Surname Tobin
Given Name Mary
Relationship to Head Daughter
Sex F
Color / Race White
Age 19
Marital Status Single
Birthplace Newfoundland
Naturalization Status Alien
Year of Immigration 1912
Father's Birthplace Newfoundland
Mother's Birthplace Newfoundland
Can Read/Write Yes
Mother Tongue English
Birth Country Canada
Birthplace (normalized) newfoundland
1940
Middlesex-County, Massachusetts
Daughter, age 29
Middlesex-County, Massachusetts · implied b. ~1911 — 12 household members
Surname Tobin
Given Name Mary G
Relationship to Head Daughter
Sex F
Color / Race White
Age 29
Marital Status Single
Birthplace Newfoundland
1935 Residence (City) Melrose
1935 Residence (County) Middlesex
Naturalization Status Alien
Occupation Mach Operator
Industry Occ Shoe Factory
Class of Worker PW
Hours Worked 40
Income (1939) 996
Highest Grade No H4
1935 Residence Same Place
Birth Country Canada
Birthplace (normalized) newfoundland

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.
Linked across censuses
Our Model Tree links Mary Tobin across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Tobin
Daughter · 1940 · age 29 · b. ~1911 · Massachusetts
★ You are viewing this record
Sibling
Constance Prendagast
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Raymond Tobin
Sibling · 1940 · age 22
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Bertha Tobin
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Gertrude Tobin
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Tobin
Sibling · 1940 · age 27
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas Tobin
Sibling · 1940 · age 25
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Angela Tobin
Sibling · 1940 · age 28
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

Page Contents

21 people indexed on this census page (nara:1940:m-t0627-01613-00471)

Line Name Age Relation Occupation Birthplace
1 Zoie Le Blanc 33 Head Waitress Massachusetts
2 Constance Prendagast 9 Daughter — Massachusetts
3 Mary G Tobin THIS PERSON 29 Daughter Mach Operator Newfoundland
4 Angela F Tobin 28 Daughter Mach Operator Newfoundland
5 Margaret Tobin 27 Daughter Actress Newfoundland
6 Thomas J Tobin 25 Son Laborer Newfoundland
7 Raymond Tobin 22 Son — Massachusetts
8 Gertrude Tobin 18 Daughter — Massachusetts
9 Bertha Tobin 15 Daughter — Massachusetts
10 Ferdinand Almy 78 Father-in-law — Illinois
11 Marjorie Berling 25 Sister-in-law Clerk Massachusetts
12 Wesley Dean 25 Step Son Gardner Massachusetts
13 John Ahearn 58 Head Salesman Massachusetts
14 Emma Ahearn 54 Wife — Massachusetts
15 Eunice A Ahearn 24 Daughter Clerk Massachusetts
16 Leo W Kavallee 43 Head Repairman Massachusetts
17 Nora Kavallee 38 Wife — Massachusetts
18 Marie Shea 10 Daughter — Massachusetts
19 Annie Shea 82 Mother-in-law — Ireland
20 Marie Aitken 34 Head — Massachusetts
21 William Lloyd Herney 33 Son Seaman Massachusetts

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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)

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