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John Duffy — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Worcester, Massachusetts
Our Model Tree links this John Duffy across the 1920 and 1930 US Censuses in Worcester, Massachusetts (XGBoost, ~Confirmed) — first a son (b.~1919), then head of a 10-person household.
Age 11
b. ~1919
Male
Son
Born: Massachusetts
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Worcester, Massachusetts |
| Surname | Duffy |
| Given Name | John Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Additional Details | |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | Worcester City |
| Est. Birth Year | ~1919 |
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.
10 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Eleanor Duffy | Daughter | — | 2 | ~1928 |
| Grace Duffy | Daughter | — | ~1930 | |
| Paula Duffy | Daughter | — | 8 | ~1922 |
| John Duffy | Head | — | 35 | ~1895 |
| Grace Duffy | Other | — | 32 | ~1898 |
| Raymond Duffy | Son | — | 6 | ~1924 |
| John Duffy | Son | — | 11 | ~1919 |
| William Duffy | Son | — | 10 | ~1920 |
| Paul Duffy | Son | — | 5 | ~1925 |
| Robert Duffy | Son | — | 3 | ~1927 |
Census Appearances
1920
Worcester, Massachusetts
Son, age 1
Worcester, Massachusetts · implied b. ~1919 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Duffy |
| Given Name | John Jr |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Worcester, Massachusetts
Son, age 11
Worcester, Massachusetts · implied b. ~1919 — 10 household members
| Surname | Duffy |
| Given Name | John Jr. |
| 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/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.
Our Model Tree links John Duffy across 2 US Census years (1920 and 1930) in Worcester, Massachusetts, using XGBoost record linkage.
Show:
This person
Anchor record
John Duffy
Son · 1930 · age 11 · b. ~1919 · Massachusetts
★ You are viewing this record
Sibling
Grace Duffy
Sibling · 1930 · age
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Paul Duffy
Sibling · 1930 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Duffy
Sibling · 1930 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Eleanor Duffy
Sibling · 1930 · age 2
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Raymond Duffy
Sibling · 1930 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Paula Duffy
Sibling · 1930 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Duffy
Sibling · 1930 · age 10
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 — Worcester, Massachusetts
Open full size
1930 US Federal Census — Worcester, Massachusetts
Page Contents
50 people indexed on this census page (ia:1930:massachusettscensus00reel969:0053)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Henry Hillwood | 59 | Head | Sorter | Canada English |
| 2 | Jennie Hillwood | 52 | Wife-H | — | Newfoundland |
| 3 | Herbert Hillwood | 17 | Son | Lab. Worker | Massachusetts |
| 4 | Elizabeth O. Hillwood | 13 | Daughter | — | Massachusetts |
| 5 | Michael Thomas | 23 | Head | Salesman | Massachusetts |
| 6 | Walter Thomas | 22 | Brother | Vulcanizer | Massachusetts |
| 7 | Alice Thomas | 21 | Sister | Operator | Massachusetts |
| 8 | Philip Thomas | 19 | Brother | Chauffeur | Massachusetts |
| 9 | Mary Thomas | 16 | Sister | — | Massachusetts |
| 10 | Francis Thomas | 11 | Brother | — | Massachusetts |
| 11 | Alfred Thomas | 9 | Brother | — | Massachusetts |
| 12 | William Guilfoyle | 39 | Head | Clerk | Massachusetts |
| 13 | Helen Guilfoyle | 29 | Wife-H | — | New Jersey |
| 14 | Thomas Guilfoyle | 9 | Son | — | Massachusetts |
| 15 | Richard Guilfoyle | 7 | Son | — | Massachusetts |
| 16 | Marie Guilfoyle | 5 | Daughter | — | Massachusetts |
| 17 | Barbara Guilfoyle | 2 | Daughter | — | Massachusetts |
| 18 | Thomas J. Guilfoyle | 69 | Head | Retired | Massachusetts |
| 19 | Catherine Guilfoyle | 63 | Wife-H | — | Massachusetts |
| 20 | Sarah Guilfoyle | 33 | Daughter | Operator | Massachusetts |
| 21 | Rose M. Guilfoyle | 25 | Daughter | Secretary | Massachusetts |
| 22 | John J. Duffy | 35 | Head | Laborer | Massachusetts |
| 23 | Grace M. Duffy | 32 | Wife-H | — | Massachusetts |
| 24 | John Jr. Duffy THIS PERSON | 11 | Son | — | Massachusetts |
| 25 | William Duffy | 10 | Son | — | Massachusetts |
| 26 | Paula M. Duffy | 8 | Daughter | — | Massachusetts |
| 27 | Raymond Duffy | 6 | Son | — | Massachusetts |
| 28 | Paul C. Duffy | 5 | Son | — | Massachusetts |
| 29 | Robert Duffy | 3 | Son | — | Massachusetts |
| 30 | Eleanor Duffy | 2 | Daughter | — | Massachusetts |
| 31 | Grace M. Duffy | 0 | Daughter | — | Massachusetts |
| 32 | Arthur Guilbeault | 35 | Head | Clerk | Canada French |
| 33 | Amelia Guilbeault | 31 | Wife-H | — | Massachusetts |
| 34 | Edmond Guilbeault | 4 | Son | — | Massachusetts |
| 35 | Georgette Guilbeault | 0 | Daughter | — | Massachusetts |
| 36 | William Pilling | 53 | Head | Manager | Massachusetts |
| 37 | Thomas Pilling | 23 | Son | Student | Massachusetts |
| 38 | Marion Pilling | 17 | Daughter | — | Massachusetts |
| 39 | Ella F. Stanley | 69 | Mother-in-law | Housekeeper | Connecticut |
| 40 | David Naiman | 55 | Head | Carpenter | Russia |
| 41 | Bella Naiman | 53 | Wife-H | — | Russia |
| 42 | Ethel Naiman | 25 | Daughter | Packer | Russia |
| 43 | Bernard Naiman | 18 | Son | Helper | Massachusetts |
| 44 | Thelma Naiman | 12 | Daughter | — | Massachusetts |
| 45 | Abraham Robinson | 64 | Head | Retired | Russia |
| 46 | Edith Robinson | 64 | Wife-H | — | Russia |
| 47 | Robert Robinson | 27 | Son | Agent | Massachusetts |
| 48 | Simon Robinson | 25 | Son | Partnership | Massachusetts |
| 49 | Edward Robinson | 21 | Son | Partnership | Massachusetts |
| 50 | Nelle Robinson | 23 | Daughter | Bookkeeper | Massachusetts |
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)