MD
Mary Duffy — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Hudson, New Jersey
Our Model Tree links this Mary Duffy across the 1930 and 1940 US Censuses in Hudson, New Jersey (XGBoost, ~Confirmed) — first a spouse (b.~1882), then head of a 14-person household.
Age 48
b. ~1882
Female
Spouse
Born: New Jersey
Married
1930 Census Record Details
| Census Year | 1930 |
| Location | Hudson, New Jersey |
| Surname | Duffy |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 48 |
| Marital Status | Married |
| Birthplace | New Jersey |
| Age at First Marriage | 23 |
| Father's Birthplace | New Jersey |
| Mother's Birthplace | New Jersey |
| Additional Details | |
| Can Read/Write | Yes |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
| Township / Ward | Jersey City |
| Est. Birth Year | ~1882 |
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.
14 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Anna Duffy | Daughter | — | ~1930 | |
| Margaret Duffy | Daughter | — | 2 | ~1928 |
| Mary Duffy | Daughter | — | 20 | ~1910 |
| Dorothy Duffy | Daughter | — | 10 | ~1920 |
| Helen Duffy | Daughter | — | 12 | ~1918 |
| John Duffy | Head | — | 50 | ~1880 |
| Richard Duffy | Son | — | 6 | ~1924 |
| James Duffy | Son | — | 16 | ~1914 |
| Thomas Duffy | Son | — | 18 | ~1912 |
| Robert Duffy | Son | — | 14 | ~1916 |
| John Duffy | Son | — | 22 | ~1908 |
| Edward Duffy | Son | — | 4 | ~1926 |
| William Duffy | Son | — | 8 | ~1922 |
| Mary Duffy | Spouse | — | 48 | ~1882 |
Census Appearances
1930
Hudson, New …
Spouse, age 48
Hudson, New Jersey · implied b. ~1882 — 14 household members
| Surname | Duffy |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 48 |
| Marital Status | Married |
| Birthplace | New Jersey |
| Age at First Marriage | 23 |
| Father's Birthplace | New Jersey |
| Mother's Birthplace | New Jersey |
| Can Read/Write | Yes |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
1940
Hudson-County, New …
Head, age 59
Hudson-County, New Jersey · implied b. ~1881 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Duffy |
| Given Name | Mae V. |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 59 |
| Marital Status | Widowed |
| Birthplace | New Jersey |
| 1935 Residence (City) | Jersey City |
| 1935 Residence (County) | Hudson |
| Occupation | Clerk |
| Industry | Public school |
| Class of Worker | GW |
| Hours Worked | 44 |
| Income (1939) | 2000 |
| Highest Grade | H-4 |
| 1935 Residence | Same place |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
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 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Mary Duffy
Spouse · 1930 · age 48 · b. ~1882 · New Jersey
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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 — Hudson, New Jersey
Open full size
1930 US Federal Census — Hudson, New Jersey
Page Contents
50 people indexed on this census page (ia:1930:newjerseycensus00reel1356:0970)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | William Snyder | 42 | Head | Laborer | New Jersey |
| 52 | Anna Snyder | 40 | Wife | — | New Jersey |
| 53 | William Jr Snyder | 18 | Son | Laborer | New Jersey |
| 54 | Margaret Snyder | 16 | Daughter | Clerk | New Jersey |
| 55 | John Snyder | 14 | Son | — | New Jersey |
| 56 | Robert Snyder | 12 | Son | — | New Jersey |
| 57 | Dorothy Snyder | 10 | Daughter | — | New Jersey |
| 58 | Helen Snyder | 8 | Daughter | — | New Jersey |
| 59 | Thomas Snyder | 6 | Son | — | New Jersey |
| 60 | James Snyder | 4 | Son | — | New Jersey |
| 61 | Richard Snyder | 2 | Son | — | New Jersey |
| 62 | Edward Snyder | 0 | Son | — | New Jersey |
| 63 | William Close | 45 | Head | Laborer | New Jersey |
| 64 | Mary Close | 42 | Wife | — | New Jersey |
| 65 | William Jr Close | 18 | Son | Laborer | New Jersey |
| 66 | John Close | 16 | Son | Laborer | New Jersey |
| 67 | Robert Close | 14 | Son | — | New Jersey |
| 68 | Dorothy Close | 12 | Daughter | — | New Jersey |
| 69 | Helen Close | 10 | Daughter | — | New Jersey |
| 70 | Thomas Close | 8 | Son | — | New Jersey |
| 71 | James Close | 6 | Son | — | New Jersey |
| 72 | Richard Close | 4 | Son | — | New Jersey |
| 73 | Edward Close | 2 | Son | — | New Jersey |
| 74 | Margaret Close | 0 | Daughter | — | New Jersey |
| 75 | John Duffy | 50 | Head | Laborer | New Jersey |
| 76 | Mary Duffy THIS PERSON | 48 | Wife | — | New Jersey |
| 77 | John Jr Duffy | 22 | Son | Laborer | New Jersey |
| 78 | Mary Duffy | 20 | Daughter | Clerk | New Jersey |
| 79 | Thomas Duffy | 18 | Son | Laborer | New Jersey |
| 80 | James Duffy | 16 | Son | Laborer | New Jersey |
| 81 | Robert Duffy | 14 | Son | — | New Jersey |
| 82 | Helen Duffy | 12 | Daughter | — | New Jersey |
| 83 | Dorothy Duffy | 10 | Daughter | — | New Jersey |
| 84 | William Duffy | 8 | Son | — | New Jersey |
| 85 | Richard Duffy | 6 | Son | — | New Jersey |
| 86 | Edward Duffy | 4 | Son | — | New Jersey |
| 87 | Margaret Duffy | 2 | Daughter | — | New Jersey |
| 88 | Anna Duffy | 0 | Daughter | — | New Jersey |
| 89 | Thomas Kelly | 45 | Head | Laborer | New Jersey |
| 90 | Mary Kelly | 42 | Wife | — | New Jersey |
| 91 | Thomas Jr Kelly | 18 | Son | Laborer | New Jersey |
| 92 | John Kelly | 16 | Son | Laborer | New Jersey |
| 93 | Mary Kelly | 14 | Daughter | — | New Jersey |
| 94 | Helen Kelly | 12 | Daughter | — | New Jersey |
| 95 | James Kelly | 10 | Son | — | New Jersey |
| 96 | Robert Kelly | 8 | Son | — | New Jersey |
| 97 | Dorothy Kelly | 6 | Daughter | — | New Jersey |
| 98 | William Kelly | 4 | Son | — | New Jersey |
| 99 | Richard Kelly | 2 | Son | — | New Jersey |
| 100 | Edward Kelly | 0 | Son | — | New Jersey |
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)