MD
Mary Duffy — 1930 US Census Record
Model Tree available1930 United States Federal Census · Bristol, Massachusetts
Our Model Tree links this Mary Duffy across the 1910, 1920 and 1930 US Censuses in Bristol, Massachusetts (XGBoost, ~Confirmed), with identified parents Matthew & Mary — first a daughter (b.~1908), then head of a 5-person household.
Age 22
b. ~1908
Female
Daughter
Born: Massachusetts
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Bristol, Massachusetts |
| Surname | Duffy |
| Given Name | Mary E |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | New Jersey |
| Mother's Birthplace | Massachusetts |
| Additional Details | |
| Occupation | Weaver |
| Industry | Cotton Mill |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Weaver |
| Township / Ward | Fall River City |
| Est. Birth Year | ~1908 |
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.
5 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Alice Duffy | Daughter | — | 15 | ~1915 |
| Mary Duffy | Daughter | — | 22 | ~1908 |
| Matthew Duffy | Head | — | 52 | ~1878 |
| Patrick Duffy | Son | — | 25 | ~1905 |
| Mary Duffy | Spouse | — | 53 | ~1877 |
Census Appearances
1910
Bristol, Massachusetts
Daughter, age 2
Bristol, Massachusetts · implied b. ~1908 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Duffy |
| Given Name | Mary E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | New Jersey |
| Mother's Birthplace | Massachusetts |
| Occupation | none |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1920
Bristol, Massachusetts
Daughter, age 12
Bristol, Massachusetts · implied b. ~1908 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Duffy |
| Given Name | Mary E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | New Jersey |
| Mother's Birthplace | Massachusetts |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Bristol, Massachusetts
Daughter, age 22
Bristol, Massachusetts · implied b. ~1908 — 5 household members
| Surname | Duffy |
| Given Name | Mary E |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | New Jersey |
| Mother's Birthplace | Massachusetts |
| Occupation | Weaver |
| Industry | Cotton Mill |
| Class of Worker | W |
| 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 Mary Duffy across 3 US Census years (1910, 1920 and 1930) in Bristol, Massachusetts, using XGBoost record linkage. Identified parents: father Matthew Duffy (~0.92 confidence) and mother Mary Duffy (~0.92 confidence) and mother Mary Duffy (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Matthew Duffy
b. ~1876
Source father
● Household
· direct · ~0.92
Mother
Mary Duffy
b. ~1878
Source mother
● Household
· direct · ~0.92
Mother
Mary Duffy
b. ~1878
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Duffy
Daughter · 1930 · age 22 · b. ~1908 · Massachusetts
★ You are viewing this record
Sibling
Patrick Duffy
Sibling · 1930 · age 25
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Alice Duffy
Sibling · 1930 · age 15
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 — Bristol, Massachusetts
Open full size
1930 US Federal Census — Bristol, Massachusetts
Page Contents
16 people indexed on this census page (ia:1930:massachusettscensus00reel887:0464)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Matthew Duffy | 52 | Head | Labor Hand | New Jersey |
| 2 | Mary E Duffy | 53 | Wife | Weaver | Massachusetts |
| 3 | Patrick J Duffy | 25 | Son | Spare Hand | Rhode Island |
| 4 | Mary E Duffy THIS PERSON | 22 | Daughter | Weaver | Massachusetts |
| 5 | Alice F Duffy | 15 | Daughter | — | Massachusetts |
| 6 | Arthur Banks | 39 | Head | Chauffeur | Massachusetts |
| 7 | Edna Banks | 28 | Wife | — | Massachusetts |
| 8 | Gerald A Banks | 1 | Son | — | Massachusetts |
| 9 | Catherine Harrington | 50 | Head | — | Massachusetts |
| 10 | John Harrington | 18 | Son | Bookkeeper | Massachusetts |
| 11 | Francis Harrington | 16 | Son | Errand Boy | Massachusetts |
| 12 | William Harrington | 15 | Son | — | Massachusetts |
| 13 | Mary Harrington | 12 | Daughter | — | Massachusetts |
| 14 | Margaret Murphy | 43 | Sister | Telephone Oper. | Massachusetts |
| 15 | Daniel J Murphy | 12 | Nephew | — | Massachusetts |
| 16 | J. Edmond Estes | 62 | Head | Cotton Mfg. | Massachusetts |
Pedigree Summary
Mary + 2 siblings
Gen 1 · 3 parents
~0.92
Max depth 4 (1900–1950 window)
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)