MD
Margaret Duffy — 1940 US Census Record
Model Tree available1940 United States Federal Census · Hudson-County, New Jersey
Our Model Tree links this Margaret Duffy across the 1920, 1930 and 1940 US Censuses in Hudson-County, New Jersey (XGBoost, ~Confirmed), with identified parents Thomas & Catherine — first a daughter (b.~1911), then head of a 2-person household.
Age 29
b. ~1911
Female
Daughter
Born: New Jersey
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Hudson-County, New Jersey |
| Surname | Duffy |
| Given Name | Margaret L. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 29 |
| Marital Status | Single |
| Birthplace | New Jersey |
| 1935 Residence (City) | Jersey City |
| 1935 Residence (County) | Hudson |
| Additional Details | |
| Occupation | Secretary |
| Industry | Steamship Co |
| Class of Worker | PW |
| Hours Worked | 38 |
| Income (1939) | 1800 |
| Highest Grade | H 4 |
| 1935 Residence | Same Place |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
| Occupation | Secretary |
| Township / Ward | Jersey City |
| Est. Birth Year | ~1911 |
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 Margaret | Age | Birth yr |
|---|---|---|---|---|
| Catherine Duffy | Head | — | 68 | ~1872 |
| Margaret Duffy | Daughter | — | 29 | ~1911 |
Census Appearances
1920
Hudson, New …
Daughter, age 9
Hudson, New Jersey · implied b. ~1911 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Duffy |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 9 |
| Marital Status | Single |
| Birthplace | New Jersey |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
1930
Hudson, New …
Daughter, age 19
Hudson, New Jersey · implied b. ~1911 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Duffy |
| Given Name | Margaret H |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | New Jersey |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Occupation | Secretary |
| Industry | Steamship |
| Class of Worker | W |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
1940
Hudson-County, New …
Daughter, age 29
Hudson-County, New Jersey · implied b. ~1911 — 2 household members
| Surname | Duffy |
| Given Name | Margaret L. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 29 |
| Marital Status | Single |
| Birthplace | New Jersey |
| 1935 Residence (City) | Jersey City |
| 1935 Residence (County) | Hudson |
| Occupation | Secretary |
| Industry | Steamship Co |
| Class of Worker | PW |
| Hours Worked | 38 |
| Income (1939) | 1800 |
| 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 Margaret Duffy across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Thomas Duffy (~0.92 confidence) and mother Catherine Duffy (~0.92 confidence) and mother Catherine Duffy (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Thomas Duffy
b. ~1869
Source father
● Household
· direct · ~0.92
Mother
Catherine Duffy
b. ~1872
Source mother
● Household
· direct · ~0.92
Mother
Catherine Duffy
b. ~1872
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Margaret Duffy
Daughter · 1940 · age 29 · b. ~1911 · New Jersey
★ 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 — Hudson-County, New Jersey
Open full size
1940 US Federal Census — Hudson-County, New Jersey
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02408-00169)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Mildred | 27 | Wife | — | New York |
| 2 | Nellie D. Lillis | 54 | Head | — | New Jersey |
| 3 | Howard G. Springer | 55 | Head | Postal Clerk | New Jersey |
| 4 | Jennie G. Springer | 55 | Wife | — | New Jersey |
| 5 | Emil P. Perkins | 68 | Head | Broker | New York |
| 6 | Catherine Perkins | 49 | Wife | — | New Jersey |
| 7 | Walter Freid | 46 | Head | Statistician | New Jersey |
| 8 | Agnes D. Freid | 43 | Wife | — | New Jersey |
| 9 | Catherine G. Duffy | 68 | Head | — | Massachusetts |
| 10 | Margaret L. Duffy THIS PERSON | 29 | Daughter | Secretary | New Jersey |
| 11 | Abraham Miller | 29 | Head | Teacher | New York |
| 12 | Frances Miller | 25 | Wife | Statistician | New Jersey |
| 13 | Jessie F. Lewis | 75 | Head | — | New Jersey |
| 14 | Lillian Lewis | 47 | Daughter | Secretary | New Jersey |
| 15 | Florence D. Duffy | 45 | Head | — | New York |
| 16 | Bernice Duffy | 22 | Daughter | Dancer | New Jersey |
| 17 | Harry D. Ihler | 34 | Head | Mechanic | Prussia |
| 18 | John Bushnell | 39 | Lodger | Deliverer | New Jersey |
| 19 | Niels George Olsen | 28 | Head | Junior Accountant | New York |
| 20 | Frances Adam Olsen | 23 | Wife | Laboratory Technician | New York |
| 21 | Mary J. Horn | 49 | Head | — | Ohio |
| 22 | Margherita Rosellini | 42 | Head | Private Secretary | New Hampshire |
| 23 | William B. Luider | 36 | Head | Foreman | New Jersey |
| 24 | Marion Ford Luider | 37 | Wife | Clerical | New Jersey |
| 25 | Russell B. Norris | 34 | Head | Bank Teller | New Jersey |
| 26 | Ann D. Norris | 29 | Wife | Stenographer | Pennsylvania |
| 27 | Audrey Guilfoyle | 22 | Head | Secretary | New Jersey |
| 28 | Anna Jane Guilfoyle | 14 | Sister | — | New Jersey |
| 29 | Victor Nordquist | 55 | Head | Tool Maker | Sweden |
| 30 | Clara V. Nordquist | 37 | Wife | Secretary | Sweden |
| 31 | John James Kennedy | 31 | Head | Credit Man | New Jersey |
| 32 | Margaret Agnes Kennedy | 33 | Sister | Comptometer Op. | New Jersey |
| 33 | Charlotte M. Slake | 21 | Head | — | New Jersey |
| 34 | Dennis J. Gallagher | 45 | Head | Real Estate Sales | New Jersey |
| 35 | Frederick Neudecker | 38 | Head | Painter | New Jersey |
| 36 | Anna Neudecker | 39 | Wife | — | New Jersey |
| 37 | Arlene Neudecker | 15 | Daughter | — | New Jersey |
| 38 | Frederick Schofield | 51 | Head | Printer | New Jersey |
| 39 | Edna Schofield | 54 | Wife | — | New Jersey |
| 40 | Arthur J. Weidemuller | 49 | Head | Postal Clerk | New Jersey |
Pedigree Summary
Margaret
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 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)