MD
Mary Duffy — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Providence-County, Rhode Island
Our Model Tree links this Mary Duffy across the 1920, 1930 and 1940 US Censuses in Providence-County, Rhode Island (XGBoost, ~Confirmed) — first a head (b.~1877), then head of a 3-person household.
Age 63
b. ~1877
Female
Head
Born: Rhode Island
Widowed
1940 Census Record Details
| Census Year | 1940 |
| Location | Providence-County, Rhode Island |
| Surname | Duffy |
| Given Name | Mary T. |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 63 |
| Marital Status | Widowed |
| Birthplace | Rhode Island |
| 1935 Residence (City) | Providence City |
| 1935 Residence (County) | Providence |
| Additional Details | |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Rhode Island |
| Birth Country | United States |
| Birthplace (normalized) | rhode island |
| Township / Ward | Providence City |
| Est. Birth Year | ~1877 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Katherine Duffy | Daughter | — | 19 | ~1921 |
| Mary Duffy | Head | — | 63 | ~1877 |
| John Duffy | Son | — | 39 | ~1901 |
Census Appearances
1920
Providence, Rhode …
Other, age 43
Providence, Rhode Island · implied b. ~1877 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Duffy |
| Given Name | Mary J. |
| Relationship to Head | Sister |
| Sex | F |
| Color / Race | White |
| Age | 43 |
| Marital Status | Single |
| Birthplace | Rhode Island |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Knitter |
| Industry | Hosiery |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Birth State | Rhode Island |
| Birth Country | United States |
| Birthplace (normalized) | rhode island |
1930
Providence, Rhode …
Other, age 51
Providence, Rhode Island · implied b. ~1879 — 50 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Duffy |
| Given Name | Mary |
| Relationship to Head | Sister |
| Sex | F |
| Color / Race | White |
| Age | 51 |
| Marital Status | Single |
| Birthplace | Rhode Island |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Rhode Island |
| Birth Country | United States |
| Birthplace (normalized) | rhode island |
1940
Providence-County, Rhode …
Head, age 63
Providence-County, Rhode Island · implied b. ~1877 — 3 household members
| Surname | Duffy |
| Given Name | Mary T. |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 63 |
| Marital Status | Widowed |
| Birthplace | Rhode Island |
| 1935 Residence (City) | Providence City |
| 1935 Residence (County) | Providence |
| Highest Grade | No 8 |
| 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 Mary Duffy across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Mary Duffy
Head · 1940 · age 63 · b. ~1877 · 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
40 people indexed on this census page (nara:1940:m-t0627-03779-00035)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Mary S. Morse | 63 | Wife | — | Rhode Island |
| 42 | Santos S. Morse | 45 | Head | Electrician | Italy |
| 43 | Josephine Morse | 39 | Wife | Stitcher | Rhode Island |
| 44 | Edward A. Fitzpatrick | 30 | Head | Dental Technician | Rhode Island |
| 45 | Mary A. Fitzpatrick | 30 | Wife | — | Rhode Island |
| 46 | Patricia A. Fitzpatrick | 3 | Daughter | — | Rhode Island |
| 47 | Edward A. Fitzpatrick | 0 | Son | — | Rhode Island |
| 48 | Terrence P. Fitzpatrick | 61 | Head | — | Eire |
| 49 | Rose Wilde | 35 | Daughter | Ward Maid | Rhode Island |
| 50 | Katherine Wilde | 16 | Granddaughter | — | Rhode Island |
| 51 | Samuel A. Henn | 41 | Head | Bill Collector | Rhode Island |
| 52 | Mary J. Henn | 37 | Wife | Metal Stringer | Rhode Island |
| 53 | Luigi S. Debarri | 51 | Head | Laborer | Italy |
| 54 | Jenny Debarri | 49 | Wife | — | Italy |
| 55 | Mathew Debarri | 18 | Son | Caster | Rhode Island |
| 56 | Michael Debarri | 16 | Son | Caster | Rhode Island |
| 57 | Dominic Debarri | 14 | Son | — | Rhode Island |
| 58 | Rose Debarri | 12 | Daughter | — | Rhode Island |
| 59 | Mary T. Duffy THIS PERSON | 63 | Head | — | Rhode Island |
| 60 | Katherine Duffy | 19 | Daughter | Waitress | Rhode Island |
| 61 | John R. Duffy | 39 | Son | Fireman | Rhode Island |
| 62 | James Johnson | 26 | Head | Mail Attendant | North Carolina |
| 63 | Mary Johnson | 23 | Wife | — | Rhode Island |
| 64 | James Johnson | 1 | Son | — | Rhode Island |
| 65 | Barbara A. Johnson | 0 | Daughter | — | Rhode Island |
| 66 | Leon Debaris | 28 | Head | Truck Driver | Massachusetts |
| 67 | Mary Debaris | 26 | Wife | — | Rhode Island |
| 68 | Carol Debaris | 1 | Daughter | — | Rhode Island |
| 69 | William Bond | 29 | Lodger | Truck Driver | Massachusetts |
| 70 | Eva Bond | 31 | Lodger's Wife | Filer | Massachusetts |
| 71 | Clarence Russell | 33 | Head | Office Furniture Installer | Rhode Island |
| 72 | Marian Russell | 31 | Wife | — | Massachusetts |
| 73 | Shirley Russell | 5 | Daughter | — | Rhode Island |
| 74 | Elvis T. Rust | 54 | Father-in-law | Stock Clerk | Vermont |
| 75 | Elizabeth B. Rust | 52 | Mother-in-law | Dressmaker | Iowa |
| 76 | Herman Sundberg | 59 | Head | Molder | Sweden |
| 77 | Ida S. Sundberg | 54 | Wife | Housework | Sweden |
| 78 | Ida E. Sundberg | 24 | Daughter | Office Clerk | Rhode Island |
| 79 | Etta J. Ferguson | 51 | Head | Solderer | Rhode Island |
| 80 | Joseph Brennan | 50 | Head | Machine Mechanic | Rhode Island |
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)