JD
James Duffy — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Providence, Rhode Island
Our Model Tree links this James Duffy across the 1920 and 1930 US Censuses in Providence, Rhode Island (XGBoost, ~Confirmed) — first a son (b.~1905), then head of a 15-person household.
Age 25
b. ~1905
Male
Son
Born: Rhode Island
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Providence, Rhode Island |
| Surname | Duffy |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Rhode Island |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Rhode Island |
| Additional Details | |
| Can Read/Write | Yes |
| Birth State | Rhode Island |
| Birth Country | United States |
| Birthplace (normalized) | rhode island |
| Township / Ward | Pawtucket City |
| Est. Birth Year | ~1905 |
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.
15 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to James | Age | Birth yr |
|---|---|---|---|---|
| Mary Duffy | Daughter | — | 21 | ~1909 |
| Elizabeth Duffy | Daughter | — | 17 | ~1913 |
| Catherine Duffy | Daughter | — | 7 | ~1923 |
| Alice Duffy | Daughter | — | 5 | ~1925 |
| Margaret Duffy | Daughter | — | 15 | ~1915 |
| Isabella Duffy | Daughter | — | 23 | ~1907 |
| John Duffy | Head | — | 54 | ~1876 |
| Robert Duffy | Son | — | 3 | ~1927 |
| James Duffy | Son | — | 25 | ~1905 |
| Edward Duffy | Son | — | 11 | ~1919 |
| John Duffy | Son | — | 19 | ~1911 |
| William Duffy | Son | — | 1 | ~1929 |
| Joseph Duffy | Son | — | 9 | ~1921 |
| Thomas Duffy | Son | — | 13 | ~1917 |
| Mary Duffy | Spouse | — | 51 | ~1879 |
Census Appearances
1920
Providence, Rhode …
Son, age 15
Providence, Rhode Island · implied b. ~1905 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Duffy |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Rhode Island |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Rhode Island |
| Birth Country | United States |
| Birthplace (normalized) | rhode island |
1930
Providence, Rhode …
Son, age 25
Providence, Rhode Island · implied b. ~1905 — 15 household members
| Surname | Duffy |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Rhode Island |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Rhode Island |
| Can Read/Write | Yes |
| Birth State | Rhode Island |
| Birth Country | United States |
| Birthplace (normalized) | rhode island |
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 James Duffy across 2 US Census years (1920 and 1930) in Providence, Rhode Island, using XGBoost record linkage.
Show:
This person
Anchor record
James Duffy
Son · 1930 · age 25 · b. ~1905 · Rhode Island
★ You are viewing this record
Sibling
William Duffy
Sibling · 1930 · age 1
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Elizabeth Duffy
Sibling · 1930 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Isabella Duffy
Sibling · 1930 · age 23
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Duffy
Sibling · 1930 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Catherine Duffy
Sibling · 1930 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Edward Duffy
Sibling · 1930 · age 11
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
Margaret Duffy
Sibling · 1930 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Alice Duffy
Sibling · 1930 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Duffy
Sibling · 1930 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas Duffy
Sibling · 1930 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joseph Duffy
Sibling · 1930 · age 9
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 — Providence, Rhode Island
Open full size
1930 US Federal Census — Providence, Rhode Island
Page Contents
50 people indexed on this census page (ia:1930:15thcensus2173unit:0964)
| Line | Name | Age | Relation | Birthplace |
|---|---|---|---|---|
| 1 | John B. Choquette | 41 | Head | Rhode Island |
| 2 | Rose Choquette | 38 | Wife | Rhode Island |
| 3 | John Choquette | 18 | Son | Rhode Island |
| 4 | Aloysius Duffy | 33 | Head | Ireland |
| 5 | Catherine Duffy | 30 | Wife | Rhode Island |
| 6 | Robert Duffy | 12 | Son | Rhode Island |
| 7 | Catherine Duffy | 10 | Daughter | Rhode Island |
| 8 | Margaret Duffy | 8 | Daughter | Rhode Island |
| 9 | James Duffy | 4 | Son | Rhode Island |
| 10 | John Duffy | 1 | Son | Rhode Island |
| 11 | Mary Duffy | 0 | Daughter | Rhode Island |
| 12 | James Duffy | 31 | Brother | Ireland |
| 13 | John Duffy | 28 | Brother | Ireland |
| 14 | Margaret Duffy | 18 | Sister | Rhode Island |
| 15 | John Duffy | 54 | Head | Ireland |
| 16 | Mary Duffy | 51 | Wife | Rhode Island |
| 17 | James Duffy THIS PERSON | 25 | Son | Rhode Island |
| 18 | Isabella Duffy | 23 | Daughter | Rhode Island |
| 19 | Mary Duffy | 21 | Daughter | Rhode Island |
| 20 | John Duffy | 19 | Son | Rhode Island |
| 21 | Elizabeth Duffy | 17 | Daughter | Rhode Island |
| 22 | Margaret Duffy | 15 | Daughter | Rhode Island |
| 23 | Thomas Duffy | 13 | Son | Rhode Island |
| 24 | Edward Duffy | 11 | Son | Rhode Island |
| 25 | Joseph Duffy | 9 | Son | Rhode Island |
| 26 | Catherine Duffy | 7 | Daughter | Rhode Island |
| 27 | Alice Duffy | 5 | Daughter | Rhode Island |
| 28 | Robert Duffy | 3 | Son | Rhode Island |
| 29 | William Duffy | 1 | Son | Rhode Island |
| 30 | James Duffy | 45 | Head | Rhode Island |
| 31 | Mary Duffy | 42 | Wife | Rhode Island |
| 32 | James Duffy | 18 | Son | Rhode Island |
| 33 | John Duffy | 16 | Son | Rhode Island |
| 34 | Thomas Duffy | 14 | Son | Rhode Island |
| 35 | Edward Duffy | 12 | Son | Rhode Island |
| 36 | Joseph Duffy | 10 | Son | Rhode Island |
| 37 | Catherine Duffy | 8 | Daughter | Rhode Island |
| 38 | Alice Duffy | 6 | Daughter | Rhode Island |
| 39 | Robert Duffy | 4 | Son | Rhode Island |
| 40 | William Duffy | 2 | Son | Rhode Island |
| 41 | Mary Duffy | 0 | Daughter | Rhode Island |
| 42 | James Duffy | 45 | Head | Rhode Island |
| 43 | Mary Duffy | 42 | Wife | Rhode Island |
| 44 | James Duffy | 18 | Son | Rhode Island |
| 45 | John Duffy | 16 | Son | Rhode Island |
| 46 | Thomas Duffy | 14 | Son | Rhode Island |
| 47 | Edward Duffy | 12 | Son | Rhode Island |
| 48 | Joseph Duffy | 10 | Son | Rhode Island |
| 49 | Catherine Duffy | 8 | Daughter | Rhode Island |
| 50 | Alice Duffy | 6 | Daughter | Rhode Island |
Related Census Records
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)