WD
William Duffy — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Blair-County, Pennsylvania
Our Model Tree links this William Duffy across the 1930 and 1940 US Censuses in Blair-County, Pennsylvania (XGBoost, ~Confirmed) — first a son (b.~1922), then head of a 9-person household.
Age 18
b. ~1922
Male
Son
Born: Pennsylvania
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Blair-County, Pennsylvania |
| Surname | Duffy |
| Given Name | William |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Altoona City |
| 1935 Residence (County) | Blair |
| Additional Details | |
| Class of Worker | 0 |
| Highest Grade | H-3 |
| 1935 Residence | Same Place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Township / Ward | Altoona City |
| Est. Birth Year | ~1922 |
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.
9 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| Duellie Duffy | Head | — | 42 | ~1898 |
| Marion Duffy | Daughter | — | 12 | ~1928 |
| Rose Duffy | Daughter | — | 8 | ~1932 |
| Clement Duffy | Son | — | 3 | ~1937 |
| Agnes Duffy | Daughter | — | 21 | ~1919 |
| William Duffy | Son | — | 18 | ~1922 |
| Betty Duffy | Daughter | — | 15 | ~1925 |
| Pat Duffy | Son | — | 10 | ~1930 |
| John Duffy | Son | — | 20 | ~1920 |
Census Appearances
1930
Blair, Pennsylvania
Son, age 8
Blair, Pennsylvania · implied b. ~1922 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Duffy |
| Given Name | William E |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 8 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Blair-County, Pennsylvania
Son, age 18
Blair-County, Pennsylvania · implied b. ~1922 — 9 household members
| Surname | Duffy |
| Given Name | William |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Altoona City |
| 1935 Residence (County) | Blair |
| Class of Worker | 0 |
| Highest Grade | H-3 |
| 1935 Residence | Same Place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
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 William Duffy across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
William Duffy
Son · 1940 · age 18 · b. ~1922 · Pennsylvania
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Sibling
Agnes Duffy
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Betty Duffy
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Clement Duffy
Sibling · 1940 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Rose Duffy
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Marion Duffy
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Pat Duffy
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Duffy
Sibling · 1940 · age 20
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 — Blair-County, Pennsylvania
Open full size
1940 US Federal Census — Blair-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03437-00563)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Helen Healy | 47 | sister | Bookkeeper | Pennsylvania |
| 2 | William Healy | 34 | brother | Dentist | Pennsylvania |
| 3 | Mary Healy | 71 | mother | — | Pennsylvania |
| 4 | Duellie Duffy | 42 | Head | — | Pennsylvania |
| 5 | Agnes Duffy | 21 | daughter | Saleslady | Pennsylvania |
| 6 | John Duffy | 20 | son | Laborer | Pennsylvania |
| 7 | William Duffy THIS PERSON | 18 | son | — | Pennsylvania |
| 8 | Betty Duffy | 15 | daughter | — | Pennsylvania |
| 9 | Marion Duffy | 12 | daughter | — | Pennsylvania |
| 10 | Pat Duffy | 10 | son | — | Pennsylvania |
| 11 | Rose Mary Duffy | 8 | daughter | — | Pennsylvania |
| 12 | Clement Duffy | 3 | son | — | Pennsylvania |
| 13 | Mary Kurtz | 62 | Head | Cook | Pennsylvania |
| 14 | Katherine Plumber | 61 | sister | — | Pennsylvania |
| 15 | Marie Plumber | 20 | niece | — | Pennsylvania |
| 16 | John Frank | 33 | Head | Blacksmith Helper | Germany |
| 17 | Sara Frank | 26 | wife | — | Pennsylvania |
| 18 | John Frank | 9 | son | — | Pennsylvania |
| 19 | Walter Frank | 7 | son | — | Pennsylvania |
| 20 | Jane Frank | 6 | daughter | — | Pennsylvania |
| 21 | Eleanor Frank | 4 | daughter | — | Pennsylvania |
| 22 | Marjorie Frank | 2 | daughter | — | Pennsylvania |
| 23 | William Frank | 0 | son | — | Pennsylvania |
| 24 | John Streiner | 62 | Head | — | Pennsylvania |
| 25 | Regina Streiner | 36 | wife | — | Pennsylvania |
| 26 | John Streiner | 18 | son | — | Pennsylvania |
| 27 | Raymond Streiner | 17 | son | — | Pennsylvania |
| 28 | Katherine Streiner | 16 | daughter | — | Pennsylvania |
| 29 | Regis Streiner | 15 | son | — | Pennsylvania |
| 30 | Edward Streiner | 10 | son | — | Pennsylvania |
| 31 | Edward Heintel | 48 | Head | Molder | Pennsylvania |
| 32 | Margaret Heintel | 47 | wife | — | Pennsylvania |
| 33 | Edward Heintel | 25 | son | — | Pennsylvania |
| 34 | Charles Heintel | 23 | son | — | Pennsylvania |
| 35 | Paul Heintel | 20 | son | — | Pennsylvania |
| 36 | Rita Heintel | 18 | daughter | — | Pennsylvania |
| 37 | Delores Heintel | 14 | daughter | — | Pennsylvania |
| 38 | Leona Heintel | 9 | daughter | — | Pennsylvania |
| 39 | John Marker | 42 | Head | Labor Foreman | Pennsylvania |
| 40 | John Jr. Marker | 13 | son | — | 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)