MD
Margaret Duffy — 1940 US Census Record
Model Tree available1940 United States Federal Census · Union-County, New Jersey
Our Model Tree links this Margaret Duffy across the 1920, 1930 and 1940 US Censuses in Union-County, New Jersey (XGBoost, ~Confirmed), with identified parents George & George — first a daughter (b.~1907), then head of a 4-person household.
Age 33
b. ~1907
Female
Daughter
Born: New Jersey
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Union-County, New Jersey |
| Surname | Duffy |
| Given Name | Margaret E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 33 |
| Marital Status | Single |
| Birthplace | New Jersey |
| 1935 Residence (City) | Elizabeth City |
| Additional Details | |
| Occupation | File Clerk |
| Industry | Bank |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1620 |
| Highest Grade | H-4 |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
| Occupation | File Clerk |
| Township / Ward | Elizabeth City |
| Est. Birth Year | ~1907 |
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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Margaret | Age | Birth yr |
|---|---|---|---|---|
| Eleanor Duffy | Daughter | — | 27 | ~1913 |
| Margaret Duffy | Daughter | — | 33 | ~1907 |
| George Duffy | Head | — | 64 | ~1876 |
| Ellen Duffy | Spouse | — | 63 | ~1877 |
Census Appearances
1920
Union, New …
Daughter, age 12
Union, New Jersey · implied b. ~1908 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Duffy |
| Given Name | Mary L. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | New Jersey |
| Father's Birthplace | New York |
| Mother's Birthplace | Ireland |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
Daughter, age 22
Union, New Jersey · implied b. ~1908 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Duffy |
| Given Name | Mary L. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | New Jersey |
| Father's Birthplace | New York |
| Mother's Birthplace | New York State |
| Can Read/Write | Yes |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
1940
Union-County, New …
Daughter, age 33
Union-County, New Jersey · implied b. ~1907 — 4 household members
| Surname | Duffy |
| Given Name | Margaret E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 33 |
| Marital Status | Single |
| Birthplace | New Jersey |
| 1935 Residence (City) | Elizabeth City |
| Occupation | File Clerk |
| Industry | Bank |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1620 |
| Highest Grade | H-4 |
| 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 George Duffy (~0.92 confidence) and father George Duffy (~0.92 confidence) and mother Ellen Duffy (~0.92 confidence) and mother Mary Duffy (~0.92 confidence) and mother Nellie Duffy (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
George Duffy
b. ~1876
Source father
● Household
· direct · ~0.92
Father
George Duffy
b. ~1877
Source father
● Household
· direct · ~0.92
Mother
Ellen Duffy
b. ~1877
Source mother
● Household
· direct · ~0.92
Mother
Mary Duffy
b. ~1873
Source mother
● Household
· direct · ~0.92
Mother
Nellie Duffy
b. ~1872
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Margaret Duffy
Daughter · 1940 · age 33 · b. ~1907 · New Jersey
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Sibling
Eleanor Duffy
Sibling · 1940 · age 27
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
1940 US Federal Census — Union-County, New Jersey
Open full size
1940 US Federal Census — Union-County, New Jersey
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02400-00238)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Santa Migliella | 26 | Boarder | — | New York |
| 42 | Bess Migliella | 5 | Boarder | — | New York |
| 43 | Christine Migliella | 3 | Boarder | — | New York |
| 44 | George F. Duffy | 64 | Head | Boatman | New York |
| 45 | Ellen M. Duffy | 63 | Wife | — | Ireland |
| 46 | Margaret E. Duffy THIS PERSON | 33 | Daughter | File Clerk | New Jersey |
| 47 | Eleanor C. Duffy | 27 | Daughter | Nurse | New Jersey |
| 48 | William Kiehm | 66 | Head | Tile Setter | New York |
| 49 | Kate Kiehm | 65 | Wife | — | New York |
| 50 | Arthur Kiehm | 35 | Son | Tile Setter | New York |
| 51 | Katherine Kiehm | 34 | Daughter | Secretary | New York |
| 52 | Ann K. Eisenbud | 60 | Head | Seamstress | Russia |
| 53 | Jeanette Eisenbud | 22 | Daughter | Teacher | New Jersey |
| 54 | Leonard Eisenbud | 26 | Son | — | New Jersey |
| 55 | Patrick Mccormick | 53 | Head | Typewriter | New Jersey |
| 56 | Alice Mccormick | 22 | Daughter | Typist | New Jersey |
| 57 | Mary De Vos | 63 | Aunt | — | New Jersey |
| 58 | Robert Fitzsimmons | 23 | Lodger | Erector | Penna. |
| 59 | James J. Conroy | 59 | Head | Bartender | New Jersey |
| 60 | Mary M. Conroy | 59 | Wife | — | New Jersey |
| 61 | John J. Conroy | 27 | Son | Clerical | New Jersey |
| 62 | John J. Conroy | 27 | Son | Clerical | New Jersey |
| 63 | Joseph J. Conroy | 22 | Son | Letter Carrier | New Jersey |
| 64 | Lawrence L. Watchorn | 45 | Head | Lawyer | New Jersey |
| 65 | Fannie Watchorn | 39 | Wife | — | Russia |
| 66 | Sherman Watchorn | 15 | Son | — | New Jersey |
| 67 | Paul R. Watchorn | 11 | Son | — | New Jersey |
| 68 | John Krieg | 55 | Head | Train Maintainer | New Jersey |
| 69 | Mary A. Krieg | 52 | Wife | — | New Jersey |
| 70 | John J. Krieg | 29 | Son | Asst. Manager | New Jersey |
| 71 | Thomas Krieg | 24 | Son | Salesman | New Jersey |
| 72 | Norman M. Henley | 47 | Head | Matchmaker | New Jersey |
| 73 | Ella V. Henley | 43 | Wife | — | New Jersey |
| 74 | Melvin Mead | 25 | Brother-in-law | — | New Jersey |
| 75 | Roland R. Will | 55 | Head | Printing Pressman | New York |
| 76 | Amelia Will | 55 | Wife | — | New Jersey |
| 77 | Roland Jr. Will | 32 | Son | Frame Maker | New York |
| 78 | Amelia Will | 30 | Daughter | Mattress Stitcher | New York |
| 79 | Agnes Will | 28 | Daughter | — | New York |
| 80 | Edward Will | 19 | Son | Attendant | New York |
Related Census Records
Pedigree Summary
Margaret + 1 sibling
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)