JD
John Duffy — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Providence, Rhode Island
Our Model Tree links this John Duffy across the 1900, 1910, 1920 and 1930 US Censuses in Providence, Rhode Island (XGBoost, ~Confirmed) — first a head (b.~1879), then head of a 7-person household.
Age 51
b. ~1879
Male
Head
Born: Rhode Island
Married
1930 Census Record Details
| Census Year | 1930 |
| Location | Providence, Rhode Island |
| Surname | Duffy |
| Given Name | John F |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 51 |
| Marital Status | Married |
| Birthplace | Rhode Island |
| Age at First Marriage | 22 |
| Father's Birthplace | Rhode Island |
| Mother's Birthplace | Rhode Island |
| Additional Details | |
| Occupation | Electrician |
| Industry | Building Construction |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 25 |
| Radio Set | R |
| Veteran | Yes |
| Birth State | Rhode Island |
| Birth Country | United States |
| Birthplace (normalized) | rhode island |
| Occupation | Electrician |
| Township / Ward | Pawtucket City Part Of |
| Est. Birth Year | ~1879 |
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 John | Age | Birth yr |
|---|---|---|---|---|
| Emma Duffy | Daughter | — | 25 | ~1905 |
| Alice Duffy | Daughter | — | 18 | ~1912 |
| John Duffy | Head | — | 51 | ~1879 |
| Patrick Ball | Other | — | 50 | ~1880 |
| James Duffy | Son | — | 21 | ~1909 |
| John Duffy | Son | — | 23 | ~1907 |
| Margaret Duffy | Spouse | — | 52 | ~1878 |
Census Appearances
1900
Providence, Rhode …
Head, age 27
Providence, Rhode Island · implied b. ~1873 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Duffy |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 26 |
| Marital Status | Single |
| Birthplace | Rhode Island |
| Birth Month | July |
| Birth Year | 1873 |
| Father's Birthplace | Rhode Island |
| Mother's Birthplace | Rhode Island |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Rhode Island |
| Birth Country | United States |
| Birthplace (normalized) | rhode island |
1910
Providence, Rhode …
Head, age 34
Providence, Rhode Island · implied b. ~1876 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Duffy |
| Given Name | John F. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 34 |
| Marital Status | Married |
| Birthplace | Rhode Island |
| Years Married | 4 |
| Father's Birthplace | Rhode Island |
| Mother's Birthplace | Rhode Island |
| Occupation | Electrician |
| Industry | Machine Shop |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | English |
| Birth State | Rhode Island |
| Birth Country | United States |
| Birthplace (normalized) | rhode island |
1920
Providence, Rhode …
Head, age 42
Providence, Rhode Island · implied b. ~1878 — 19 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Duffy |
| Given Name | John F. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 42 |
| Marital Status | Married |
| Birthplace | Rhode Island |
| Father's Birthplace | Rhode Island |
| Mother's Birthplace | Rhode Island |
| Occupation | Electrician |
| Industry | General |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Rhode Island |
| Birth Country | United States |
| Year of Naturalization | R |
| Birthplace (normalized) | rhode island |
1930
Providence, Rhode …
Head, age 51
Providence, Rhode Island · implied b. ~1879 — 7 household members
| Surname | Duffy |
| Given Name | John F |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 51 |
| Marital Status | Married |
| Birthplace | Rhode Island |
| Age at First Marriage | 22 |
| Father's Birthplace | Rhode Island |
| Mother's Birthplace | Rhode Island |
| Occupation | Electrician |
| Industry | Building Construction |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 25 |
| Radio Set | R |
| Veteran | 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 John Duffy across 4 US Census years (1900, 1910, 1920 and 1930) in Providence, Rhode Island, using XGBoost record linkage.
Show:
This person
Anchor record
John Duffy
Head · 1930 · age 51 · b. ~1879 · Rhode Island
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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:1930:15thcensus2174unit:0686)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Wife H Saphie | 29 | Wife | — | Syria |
| 52 | George Saphie | 12 | Son | — | Rhode Island |
| 53 | John Saphie | 11 | Son | — | Rhode Island |
| 54 | Ibrahim Saphie | 9 | Son | — | Rhode Island |
| 55 | Daniel Saphie | 7 | Son | — | Rhode Island |
| 56 | David Saphie | 5 | Son | — | Rhode Island |
| 57 | Quinn | 44 | Head | — | Irish Free State |
| 58 | James Quinn | 23 | Son | Printer | Massachusetts |
| 59 | James C Quinn | 12 | Son | — | Rhode Island |
| 60 | Mary Quinn | 57 | Head | — | Irish Free State |
| 61 | Loretta Quinn | 22 | Daughter | Stenographer | Rhode Island |
| 62 | Edward Johnson | 57 | Head | — | England |
| 63 | Mary Johnson | 57 | Wife | — | England |
| 64 | John F Duffy THIS PERSON | 51 | Head | Electrician | Rhode Island |
| 65 | Margaret Duffy | 52 | Wife | — | England |
| 66 | Emma Duffy | 25 | Daughter | Stenographer | Rhode Island |
| 67 | John Duffy | 23 | Son | Cook | Rhode Island |
| 68 | James Duffy | 21 | Son | — | Rhode Island |
| 69 | Alice Duffy | 18 | Daughter | — | Rhode Island |
| 70 | Patrick S Ball | 50 | Boarder | Steamfitter | Rhode Island |
| 71 | Frank Quigley | 32 | Head | Salesman | Rhode Island |
| 72 | Sabina Quigley | 33 | Wife | — | Rhode Island |
| 73 | Catherine Quigley | 5 | Daughter | — | Rhode Island |
| 74 | Sabina Quigley | 3 | Daughter | — | Rhode Island |
| 75 | Margaret Quigley | 1 | Daughter | — | Rhode Island |
| 76 | John Harvey | 24 | Head | — | Rhode Island |
| 77 | Emma Harvey | 24 | Wife | Barber | Rhode Island |
| 78 | John Harvey | 1 | Son | — | Rhode Island |
| 79 | Emma Harvey | 0 | Daughter | — | Rhode Island |
| 80 | Vincenzo Baccari | 34 | Head | Carpenter | Italy |
| 81 | Maria Baccari | 25 | Wife | — | Italy |
| 82 | Vincenzo Baccari | 4 | Son | — | Rhode Island |
| 83 | Anna Baccari | 2 | Daughter | — | Rhode Island |
| 84 | Antonio Baccari | 34 | Brother | Spooler | Italy |
| 85 | Pasquale Baccari | 30 | Brother | Barber | Italy |
| 86 | Luisa Chlow | 40 | Head | — | Italy |
| 87 | Luisa Chlow | 19 | Daughter | — | Rhode Island |
| 88 | Arthur Chlow | 15 | Son | — | Rhode Island |
| 89 | Emily A Luther | 75 | Head | — | Sweden |
| 90 | Emma L Luther | 47 | Daughter | Hairdresser | Rhode Island |
| 91 | Mary Read | 35 | Head | Bookkeeper | Rhode Island |
| 92 | Mariano Ricciardi | 29 | Head | Butcher | Italy |
| 93 | Philomena Ricciardi | 24 | Wife | — | Massachusetts |
| 94 | John D Ricciardi | 0 | Son | — | Rhode Island |
| 95 | Thomas Howard | 58 | Head | Adviser | England |
| 96 | Edith E Howard | 56 | Wife | — | England |
| 97 | Earl S D Howard | 35 | Head | Accountant | Rhode Island |
| 98 | Dorothy C Howard | 32 | Wife | — | England |
| 99 | Marjorie Howard | 4 | Daughter | — | Rhode Island |
| 100 | Albert T Mclung | 56 | Head | Printer | New Hampshire |
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)