MD
Mary Duffy — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Luzerne-County, Pennsylvania
Our Model Tree links this Mary Duffy across the 1920, 1930 and 1940 US Censuses in Luzerne-County, Pennsylvania (XGBoost, ~Confirmed) — first a head (b.~1871), then head of a 3-person household.
Age 69
b. ~1871
Female
Head
Born: England
Widowed
1940 Census Record Details
| Census Year | 1940 |
| Location | Luzerne-County, Pennsylvania |
| Surname | Duffy |
| Given Name | Mary |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 69 |
| Marital Status | Widowed |
| Birthplace | England |
| 1935 Residence (City) | Midvale Plains |
| 1935 Residence (County) | Luzerne |
| Naturalization Status | Naturalized |
| Additional Details | |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth Country | England |
| Birthplace (normalized) | england |
| Township / Ward | Midvale Plains |
| Est. Birth Year | ~1871 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Rose Duffy | Daughter | — | 26 | ~1914 |
| Mary Duffy | Head | — | 69 | ~1871 |
| Thomas Duffy | Son | — | 36 | ~1904 |
Census Appearances
1920
Luzerne, Pennsylvania
Spouse, age 50
Luzerne, Pennsylvania · implied b. ~1870 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Duffy |
| Given Name | Mary A |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 50 |
| Marital Status | Married |
| Birthplace | England |
| Year of Immigration | 1885 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Birth Country | England |
| Year of Naturalization | 1894 |
| Birthplace (normalized) | england |
1930
Luzerne, Pennsylvania
Other, age 56
Luzerne, Pennsylvania · implied b. ~1874 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Duffy |
| Given Name | Mary |
| Relationship to Head | wife-H |
| Sex | F |
| Color / Race | White |
| Age | 56 |
| Marital Status | Married |
| Birthplace | England |
| Year of Immigration | 1889 |
| Age at First Marriage | 18 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | none |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Birth Country | England |
| Birthplace (normalized) | england |
1940
Luzerne-County, Pennsylvania
Head, age 69
Luzerne-County, Pennsylvania · implied b. ~1871 — 3 household members
| Surname | Duffy |
| Given Name | Mary |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 69 |
| Marital Status | Widowed |
| Birthplace | England |
| 1935 Residence (City) | Midvale Plains |
| 1935 Residence (County) | Luzerne |
| Naturalization Status | Naturalized |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth Country | England |
| Birthplace (normalized) | england |
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 (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Duffy
Head · 1940 · age 69 · b. ~1871 · Pennsylvania
★ 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 — Luzerne-County, Pennsylvania
Open full size
1940 US Federal Census — Luzerne-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03559-00060)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Catherine Milligan | 62 | Head | — | Penna |
| 42 | Ralph O Milligan | 38 | Son | Meter Runner | Penna |
| 43 | Betty Milligan | 13 | Daughter | — | Penna |
| 44 | Ralph Jr. Milligan | 12 | Grandson | — | Penna |
| 45 | Thomas Milligan | 7 | Son | — | Penna |
| 46 | Thomas Jos. O'Malley | 50 | Head | Doctor | Penna |
| 47 | Elizabeth O'Malley | 32 | Sister | Teacher | Penna |
| 48 | Michael Dooley | 47 | Head | Labor | Penna |
| 49 | Martha Dooley | 45 | Sister | Hammer | Penna |
| 50 | Elizabeth Dooley | 33 | Sister | School Teacher | Penna |
| 51 | John Gallagher | 38 | Head | Lineman | Penna |
| 52 | Eleanor Gallagher | 37 | Wife | — | Penna |
| 53 | Mary Gloria Gallagher | 7 | Daughter | — | Penna |
| 54 | Michael Garrahan | 63 | Head | Janitor | Penna |
| 55 | Mary Garrahan | 27 | Daughter | Teacher | Penna |
| 56 | Helen Garrahan | 24 | Daughter | — | Penna |
| 57 | Florence Garrahan | 22 | Daughter | Mechanic | Penna |
| 58 | Mary Duffy THIS PERSON | 69 | Head | — | England |
| 59 | Thomas Jos. Duffy | 36 | Son | Doctor | Penna |
| 60 | Rose Duffy | 26 | Daughter | School Teacher | Penna |
| 61 | James Roche | 54 | Head | Engineer | Penna |
| 62 | Winifred A. Roche | 29 | Daughter | Clerk | Penna |
| 63 | Mary Roche | 27 | Daughter | Nurse | Penna |
| 64 | Thomas Roche | 18 | Son | News Writer | Penna |
| 65 | John Roche | 18 | Son | — | Penna |
| 66 | Betty Roche | 16 | Daughter | — | Penna |
| 67 | Alex Macluskie | 32 | Head | Janitor | Penna |
| 68 | Charlotte Macluskie | 24 | Wife | — | Penna |
| 69 | Martha Macluskie | 3 | Daughter | — | Penna |
| 70 | Joan Macluskie | 2 | Daughter | — | Penna |
| 71 | Peggy Macluskie | 0 | Daughter | — | Penna |
| 72 | William Ritter | 54 | Head | Clerk | Penna |
| 73 | Anna Ritter | 55 | Wife | — | Penna |
| 74 | William Jr. Ritter | 18 | Son | — | Penna |
| 75 | Bridget Everan | 70 | Head | — | Penna |
| 76 | Mollie Everan | 48 | Niece | School Teacher | Penna |
| 77 | Catherine Ruane | 54 | Head | School Teacher | Penna |
| 78 | John Ruane | 50 | Head | Trainman | Penna |
| 79 | Mary Ruane | 50 | Wife | — | Penna |
| 80 | Catherine Ruane | 19 | Daughter | — | Penna |
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)