YourRoots by Genomelink
Sign up free
MD

Margaret Duffy — 1930 US Census Record

Model Tree available

1930 United States Federal Census · Middlesex, Massachusetts

Our Model Tree links this Margaret Duffy across the 1910, 1920 and 1930 US Censuses in Middlesex, Massachusetts (XGBoost, ~Confirmed), with identified parents John & John — first a daughter (b.~1902), then head of a 7-person household.

Age 28 b. ~1902 Female Daughter Born: Massachusetts Single

1930 Census Record Details

Census Year1930
LocationMiddlesex, Massachusetts
SurnameDuffy
Given NameMargaret M.
Relationship to HeadDaughter
SexF
Color / RaceWhite
Age28
Marital StatusSingle
BirthplaceMassachusetts
Father's BirthplaceIreland
Mother's BirthplaceIreland
Additional Details
OccupationOffice work
IndustryDry Goods
Class of WorkerW
Can Read/WriteYes
Birth StateMassachusetts
Birth CountryUnited States
Birthplace (normalized)massachusetts
OccupationOffice Work
Township / WardCambridge City
Est. Birth Year~1902

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 1930 census.

Name Relation to head Relative to Margaret Age Birth yr
Margaret Duffy Daughter — 28 ~1902
Stephen Duffy Son — 33 ~1897
Thomas Duffy Son — 34 ~1896
James Duffy Son — 35 ~1895
Thora Johnson Other — 45 ~1885
Mary Duffy Head — 65 ~1865
Timothy Mahoney Other — 50 ~1880

Census Appearances

1910
Middlesex, Massachusetts
Daughter, age 10
Middlesex, Massachusetts · implied b. ~1900 — 6 household members
●  Primary link · ~Confirmed · 2 sources
XGBoost Household
Surname Duffy
Given Name Margaret
Relationship to Head Daughter
Sex F
Age 10
Marital Status Single
Birthplace Massachusetts
Father's Birthplace Ireland
Mother's Birthplace Ireland
Can Read Yes
Can Write Yes
Speaks English English
Birth State Massachusetts
Birth Country United States
Birthplace (normalized) massachusetts
1920
Middlesex, Massachusetts
Daughter, age 19
Middlesex, Massachusetts · implied b. ~1901 — 7 household members
●  Primary link · ~Confirmed · 2 sources
XGBoost Household
Surname Duffy
Given Name Margaret M
Relationship to Head Daughter
Sex F
Color / Race White
Age 19
Marital Status Single
Birthplace Massachusetts
Father's Birthplace Ireland
Mother's Birthplace Ireland
Occupation Bookbinder
Industry Bookbindery
Class of Worker W
Can Read Yes
Can Write Yes
Speaks English Yes
Birth State Massachusetts
Birth Country United States
Birthplace (normalized) massachusetts
1930
Middlesex, Massachusetts
Daughter, age 28
Middlesex, Massachusetts · implied b. ~1902 — 7 household members
Surname Duffy
Given Name Margaret M.
Relationship to Head Daughter
Sex F
Color / Race White
Age 28
Marital Status Single
Birthplace Massachusetts
Father's Birthplace Ireland
Mother's Birthplace Ireland
Occupation Office work
Industry Dry Goods
Class of Worker W
Can Read/Write Yes
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.
Model Tree available
Our Model Tree links Margaret Duffy across 3 US Census years (1910, 1920 and 1930) in Middlesex, Massachusetts, using XGBoost record linkage. Identified parents: father John Duffy (~0.92 confidence) and father John Duffy (~0.92 confidence) and mother Bridget Duffy (~0.92 confidence) and mother Mary Duffy (~0.92 confidence) and mother Mary Duffy (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1 Parents confidence ≈ 0.92
Father
John Duffy
b. ~1856
Source father
● Household · direct · ~0.92
Father
John Duffy
b. ~1870
Source father
● Household · direct · ~0.92
Mother
Bridget Duffy
b. ~1872
Source mother
● Household · direct · ~0.92
Mother
Mary Duffy
b. ~1865
Source mother
● Household · direct · ~0.92
Mother
Mary Duffy
b. ~1864
Source mother
● Household · direct · ~0.92
This person
Anchor record
Margaret Duffy
Daughter · 1930 · age 28 · b. ~1902 · Massachusetts
★ You are viewing this record
Sibling
Thomas Duffy
Sibling · 1930 · age 34
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Stephen Duffy
Sibling · 1930 · age 33
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Duffy
Sibling · 1930 · 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

1930 US Federal Census — Middlesex, Massachusetts Open full size

Page Contents

50 people indexed on this census page (ia:1930:massachusettscensus00reel916:0677)

Line Name Age Relation Occupation Birthplace
1 Vera E. Dauphinee 42 Head Dressmaker Canada English
2 Ella L. Dauphinee 44 Sister Saleswoman Canada English
3 Bernice Knock 26 Niece Stenographer Canada English
4 Walter D. Bull 34 Head Sales Manager New York State
5 Bessie Bull 32 Wife — New York State
6 Douglas S. Bull 3 Son — New York
7 Nancy M. Bull 1 Daughter — Massachusetts
8 Frances Gruber 33 Head — Russia
9 Richard Gruber 3 Son — Massachusetts
10 Elizabeth M. Lennon 46 Head — Ireland
11 Bridget A. Lennon 43 Sister — Ireland
12 Rose Russell 21 Roomer Cashier Massachusetts
13 Cora B. Dunn 30 Lodger Artist New York State
14 Jean M. Van Hope 38 Lodger Musician France
15 Natalia Van Hope 35 Lodger — Russia
16 Ellen P. Chuck 78 Head — Maine
17 Margaret Chuck 38 Daughter Teacher Maine
18 Florence R. Gerould 62 Head — Massachusetts
19 Elizabeth Gerould 33 Daughter Social Work Massachusetts
20 William J. Mottman 70 Head — Massachusetts
21 Augusta L. Mottman 52 Wife Private Secretary Massachusetts
22 Benjamin L. Mottman 23 Son — Massachusetts
23 Elizabeth B. Mottman 14 Daughter — Massachusetts
24 Alice G. Osborn 67 Head — Massachusetts
25 Mary E. Deignan 40 Head — Massachusetts
26 Ruth J. Deignan 22 Daughter Stenographer Massachusetts
27 Charles Deignan 18 Son — Massachusetts
28 Mary Hayes 43 Head Dressmaker New Brunswick
29 Eleanor Hayes 78 Mother — New Brunswick
30 Adna B. Shaw 73 Head Manufacturer Vermont
31 Louisa L. Shaw 45 Daughter — Massachusetts
32 Gertrude M. Shaw 37 Daughter Auditor Massachusetts
33 Oscar G. Petterson 65 Head Baker Sweden
34 Wilhelmina L. Petterson 64 Wife — Sweden
35 Helge Lundholm 38 Son in law Psychologist Sweden
36 Julia L. Lundholm 37 Daughter — Massachusetts
37 Mary Duffy 65 Head — Ireland
38 James L. Duffy 35 Son Teacher Massachusetts
39 Thomas F. Duffy 34 Son — Massachusetts
40 Stephen V. Duffy 33 Son — Massachusetts
41 Margaret M. Duffy THIS PERSON 28 Daughter Office Work Massachusetts
42 Thora Johnson 45 Servant Housework Norway
43 Timothy Mahoney 50 Roomer Helper Ireland
44 Violet B. Peaslee 52 Head — Canada English
45 William S. Peaslee 23 Daughter Waitress Maine
46 Rebecca M. Peaslee 20 Daughter Waitress Maine
47 Dorothea L. Peaslee 15 Daughter — Maine
48 William J. Sullivan 61 Head Janitor Massachusetts
49 Agnes B. Sullivan 62 Wife — Massachusetts
50 William J. Sullivan 20 Son — Massachusetts

Search for Margaret Duffy

All Margaret Duffy Census Records Discover Duffy Family Tree

Pedigree Summary

Margaret + 3 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 1930 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)

Report inaccurate data
👤 View Profile 🌳 Ancestors 👥 Descendants