JD
James Duffy — 1940 US Census Record
Model Tree available1940 United States Federal Census · Providence-County, Rhode Island
Our Model Tree links this James Duffy across the 1920, 1930 and 1940 US Censuses in Providence-County, Rhode Island (XGBoost, ~Confirmed), with identified parents Mary & Margaret — first a son (b.~1914), then head of a 2-person household.
Age 26
b. ~1914
Male
Son
Born: Rhode Island
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Providence-County, Rhode Island |
| Surname | Duffy |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 26 |
| Marital Status | Single |
| Birthplace | Rhode Island |
| 1935 Residence (City) | Providence City |
| 1935 Residence (County) | Providence |
| Additional Details | |
| Occupation | laborer |
| Industry | auditorium |
| Class of Worker | PW |
| Hours Worked | 15 |
| Income (1939) | 600 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Rhode Island |
| Birth Country | United States |
| Birthplace (normalized) | rhode island |
| Occupation | Laborer |
| Township / Ward | Providence City |
| Est. Birth Year | ~1914 |
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.
2 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to James | Age | Birth yr |
|---|---|---|---|---|
| Mary Duffy | Head | — | 65 | ~1875 |
| James Duffy | Son | — | 26 | ~1914 |
Census Appearances
1920
Providence, Rhode …
Son, age 5
Providence, Rhode Island · implied b. ~1915 — 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 | 5 |
| Marital Status | Single |
| Birthplace | Rhode Island |
| Father's Birthplace | Rhode Island |
| Mother's Birthplace | Rhode Island |
| Can Read | No |
| Can Write | No |
| Speaks English | Yes |
| Mother Tongue | English |
| Birth State | Rhode Island |
| Birth Country | United States |
| Birthplace (normalized) | rhode island |
1930
Providence, Rhode …
Son, age 16
Providence, Rhode Island · implied b. ~1914 — 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 | 16 |
| Marital Status | Single |
| Birthplace | Rhode Island |
| Father's Birthplace | Rhode Island |
| Mother's Birthplace | Rhode Island |
| Can Read/Write | Yes |
| Birth State | Rhode Island |
| Birth Country | United States |
| Birthplace (normalized) | rhode island |
1940
Providence-County, Rhode …
Son, age 26
Providence-County, Rhode Island · implied b. ~1914 — 2 household members
| Surname | Duffy |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 26 |
| Marital Status | Single |
| Birthplace | Rhode Island |
| 1935 Residence (City) | Providence City |
| 1935 Residence (County) | Providence |
| Occupation | laborer |
| Industry | auditorium |
| Class of Worker | PW |
| Hours Worked | 15 |
| Income (1939) | 600 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| 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 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Mary Duffy (~0.92 confidence) and mother Margaret Duffy (~0.92 confidence) and father Eugene Duffy (~0.92 confidence) and mother Ellen Duffy (~0.92 confidence) and father Stephen Duffy (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Mary Duffy
b. ~1875
Source mother
● Household
· direct · ~0.92
Mother
Margaret Duffy
b. ~1884
Source mother
● Household
· direct · ~0.92
Father
Eugene Duffy
b. ~1885
Source father
● Household
· direct · ~0.92
Mother
Ellen Duffy
b. ~1888
Source mother
● Household
· direct · ~0.92
Father
Stephen Duffy
b. ~1888
Source father
● Household
· direct · ~0.92
This person
Anchor record
James Duffy
Son · 1940 · age 26 · b. ~1914 · Rhode Island
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Providence-County, Rhode Island
Open full size
1940 US Federal Census — Providence-County, Rhode Island
Page Contents
35 people indexed on this census page (nara:1940:m-t0627-03779-00204)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 3 | Patrick Loughran | 50 | Head | Handy Man | England |
| 4 | Kathleen Loughran | 24 | Daughter | Waitress | England |
| 5 | Mary A. Loughran | 51 | Wife | Kitchen Maid | England |
| 6 | Marie Loughran | 17 | Daughter | Waitress | Rhode Island |
| 7 | Margaret Loughran | 14 | Daughter | — | Rhode Island |
| 8 | Mattie Gentile | 51 | Head | Laborer | Italy |
| 9 | Etta Gentile | 52 | Wife | — | Italy |
| 10 | Frank Gentile | 31 | Son | Truck Driver | Penn. |
| 11 | Nicholas Gentile | 27 | Son | Janitor | Rhode Island |
| 12 | Grace Gentile | 25 | Daughter | Bench Hand | Rhode Island |
| 13 | James Gentile | 20 | Son | Bench Hand | Rhode Island |
| 14 | Josephine Gentile | 17 | Daughter | Flower Maker | Rhode Island |
| 15 | Joseph Gentile | 14 | Son | — | Rhode Island |
| 17 | Mary Duffy | 65 | Head | Cook | Eire |
| 18 | James Duffy THIS PERSON | 26 | Son | Laborer | Rhode Island |
| 20 | James Safarides | 46 | Head | Cook | Rhode Island |
| 21 | Alice Safarides | 33 | Wife | — | Rhode Island |
| 22 | Angelo Safarides | 8 | Son | — | Rhode Island |
| 23 | Walter Dean | 34 | Head | Electroplater | Rhode Island |
| 24 | Edna Dean | 36 | Wife | Machine Operator | Rhode Island |
| 25 | Lillian Dean | 11 | Daughter | — | Rhode Island |
| 26 | Marian Dean | 6 | Daughter | — | Rhode Island |
| 27 | Annie Simpson | 62 | Head | — | Canada English |
| 28 | Lillian Simpson | 34 | Daughter | Bookkeeper | Rhode Island |
| 29 | Eunice Simpson | 27 | Daughter | Polisher | Rhode Island |
| 30 | Mary Madden | 45 | Head | Sorter | Rhode Island |
| 31 | Leon Knowlton | 34 | Head | Inspector | New Hampshire |
| 32 | Gladys Knowlton | 32 | Wife | — | Rhode Island |
| 33 | Anna Moriarty | 58 | Head | Cashier | Eire |
| 34 | John Georgecady | 52 | Head | Bartender | Roumania |
| 35 | Evangeline Georgecady | 43 | Wife | — | Greece |
| 36 | Matthew Squillante | 21 | Head | Bartender | Rhode Island |
| 37 | Etta Squillante | 28 | Wife | — | Rhode Island |
| 39 | Joseph R. Smith | 6 | Son | — | Rhode Island |
| 40 | Leonard Jones | 33 | Boarder | Stenographer | Mass. |
Pedigree Summary
James
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 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)