MD
Margaret Duffy — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Delaware-County, Pennsylvania
Our Model Tree links this Margaret Duffy across the 1920, 1930 and 1940 US Censuses in Delaware-County, Pennsylvania (XGBoost, ~Confirmed) — first a spouse (b.~1899), then head of a 4-person household.
Age 41
b. ~1899
Female
Spouse
Born: Ireland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Delaware-County, Pennsylvania |
| Surname | Duffy |
| Given Name | Margaret |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 41 |
| Marital Status | Married |
| Birthplace | Ireland |
| 1935 Residence (City) | Wayne |
| 1935 Residence (County) | Delaware |
| Naturalization Status | Alien |
| Additional Details | |
| Highest Grade | No 6 |
| 1935 Residence | Same place |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
| Township / Ward | Wayne |
| Est. Birth Year | ~1899 |
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 |
|---|---|---|---|---|
| Margaret Duffy | Spouse | — | 41 | ~1899 |
| Patrick Duffy | Head | — | 41 | ~1899 |
| Margaret Duffy | Daughter | — | 4 | ~1936 |
| John Duffy | Son | — | 11 | ~1929 |
Census Appearances
1920
Westchester, New …
Other, age 21
Westchester, New York · implied b. ~1899 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Duffy |
| Given Name | Margaret |
| Relationship to Head | Servant |
| Sex | F |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Ireland |
| Year of Immigration | 1914 |
| Naturalization Status | Alien |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Cook |
| Industry | Private Family |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Irish |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1930
Philadelphia, Pennsylvania
Other, age 32
Philadelphia, Pennsylvania · implied b. ~1898 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Duffy |
| Given Name | Margaret |
| Relationship to Head | Servant |
| Sex | F |
| Color / Race | White |
| Age | 32 |
| Marital Status | Single |
| Birthplace | Ireland |
| Naturalization Status | Alien |
| Year of Immigration | 1914 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Cook |
| Industry | Private Family |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Veteran | no |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1940
Delaware-County, Pennsylvania
Spouse, age 41
Delaware-County, Pennsylvania · implied b. ~1899 — 4 household members
| Surname | Duffy |
| Given Name | Margaret |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 41 |
| Marital Status | Married |
| Birthplace | Ireland |
| 1935 Residence (City) | Wayne |
| 1935 Residence (County) | Delaware |
| Naturalization Status | Alien |
| Highest Grade | No 6 |
| 1935 Residence | Same place |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
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 3 locations, using XGBoost record linkage.
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This person
Anchor record
Margaret Duffy
Spouse · 1940 · age 41 · b. ~1899 · Pennsylvania
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Delaware-County, Pennsylvania
Open full size
1940 US Federal Census — Delaware-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03495-00093)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Arthur Landwehr | 30 | Head | Florist | Pennsylvania |
| 42 | Florence Landwehr | 29 | Wife | Librarian | Pennsylvania |
| 43 | Charles Trego | 46 | Head | Painter | Pennsylvania |
| 44 | Anna Trego | 38 | Wife | — | Wash D.C. |
| 45 | Charles Hertel | 34 | Head | Bookkeeper | Pennsylvania |
| 46 | Doris I Hertel | 28 | Wife | — | England |
| 47 | Robert Hertel | 2 | Son | — | Pennsylvania |
| 48 | Howard Martinez | 8 | Step son | — | Pennsylvania |
| 49 | Mary Greenhalgh | 56 | Mother in law | — | England |
| 50 | Charles Greenhalgh | 30 | Brother in law | Automobile | Pennsylvania |
| 51 | Layton Fireng | 46 | Head | Right Of Way Agent | New Jersey |
| 52 | Louise Fireng | 43 | Wife | — | New York |
| 53 | Layton Fireng | 4 | Son | — | Pennsylvania |
| 54 | Earl Detwiler | 41 | Head | Superintendent Sewer Co. | Pennsylvania |
| 55 | Pearl Detwiler | 36 | Wife | Music Teacher | Pennsylvania |
| 56 | Patrick Duffy | 41 | Head | Gardener | Ireland |
| 57 | Margaret Duffy THIS PERSON | 41 | Wife | — | Ireland |
| 58 | John P Duffy | 11 | Son | — | Pennsylvania |
| 59 | Margaret M Duffy | 4 | Daughter | — | Pennsylvania |
| 60 | Eliz A Leightner | 33 | Head | Boarding House | Pennsylvania |
| 61 | Deloris Laughner | 22 | Niece | Waitress | Pennsylvania |
| 62 | Leroy Hartman | 24 | Boarder | Mechanic Auto | Pennsylvania |
| 63 | Judith Laughner | 2 | Grand niece | — | Pennsylvania |
| 64 | Ellen Rowe | 40 | Sister | Practical Nurse | Pennsylvania |
| 65 | Mary Patton | 82 | Boarder | — | Pennsylvania |
| 66 | Mary Severs | 82 | Boarder | — | England |
| 67 | David Kelle | 12 | Boarder | — | Pennsylvania |
| 68 | Robert Rasor | 27 | Boarder | Office Manager | Ohio |
| 69 | Margaret Stewart | 52 | Head | — | Pennsylvania |
| 70 | Margaret Stewart | 24 | Daughter | General Office Work | Pennsylvania |
| 71 | Sarah Stewart | 22 | Daughter | Registered Nurse | Pennsylvania |
| 72 | Charles Stewart | 20 | Son | — | Pennsylvania |
| 73 | James Scott | 57 | Head | General Farm Worker | Ireland |
| 74 | Minnie Scott | 52 | Wife | — | Ireland |
| 75 | Mary Scott | 23 | Daughter | Secretary | Pennsylvania |
| 76 | John Scott | 21 | Son | Office Clerk | Pennsylvania |
| 77 | George Sr Lantz | 54 | Head | Plumber | Pennsylvania |
| 78 | Bessie Lantz | 52 | Wife | — | Pennsylvania |
| 79 | May E Lantz | 32 | Daughter | Secretary | Pennsylvania |
| 80 | George Lantz | 30 | Son | Clerk | Pennsylvania |
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)