WC
William Cassidy — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Philadelphia-County, Pennsylvania
Our Model Tree links this William Cassidy across the 1930 and 1940 US Censuses in Philadelphia-County, Pennsylvania (XGBoost, ~Confirmed) — first a son (b.~1915), then head of a 7-person household.
Age 25
b. ~1915
Male
Son
Born: Penna
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Philadelphia-County, Pennsylvania |
| Surname | Cassidy |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Penna |
| 1935 Residence (City) | Philadelphia City |
| 1935 Residence (County) | Philadelphia |
| Additional Details | |
| Occupation | Labor |
| Industry | City |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1040 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | penna |
| Occupation | Labor |
| Township / Ward | Philadelphia City |
| Est. Birth Year | ~1915 |
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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| Mary Cassidy | Daughter | — | 21 | ~1919 |
| Patricia Cassidy | Daughter | — | 8 | ~1932 |
| Thomas Cassidy | Son | — | 12 | ~1928 |
| William Cassidy | Son | — | 25 | ~1915 |
| John Cassidy | Son | — | 23 | ~1917 |
| Mary Cassidy | Head | — | 54 | ~1886 |
| Catherine Cassidy | Daughter | — | 18 | ~1922 |
Census Appearances
1930
Philadelphia, Pennsylvania
Son, age 15
Philadelphia, Pennsylvania · implied b. ~1915 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cassidy |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Penna |
| Father's Birthplace | Penna |
| Mother's Birthplace | Penna |
| Occupation | Laborer |
| Industry | Dress Factory |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | penna |
1940
Philadelphia-County, Pennsylvania
Son, age 25
Philadelphia-County, Pennsylvania · implied b. ~1915 — 7 household members
| Surname | Cassidy |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Penna |
| 1935 Residence (City) | Philadelphia City |
| 1935 Residence (County) | Philadelphia |
| Occupation | Labor |
| Industry | City |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1040 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | penna |
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 Cassidy across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
William Cassidy
Son · 1940 · age 25 · b. ~1915 · Pennsylvania
★ You are viewing this record
Sibling
Thomas Cassidy
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Catherine Cassidy
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Cassidy
Sibling · 1940 · age 23
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Cassidy
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Patricia Cassidy
Sibling · 1940 · age 8
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 — Philadelphia-County, Pennsylvania
Open full size
1940 US Federal Census — Philadelphia-County, Pennsylvania
Page Contents
28 people indexed on this census page (nara:1940:m-t0627-03702-00548)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Susan Ulrich | 38 | Wife | — | Eire |
| 2 | Harry Ulrich | 17 | Son | New Worker | Penna |
| 3 | Elizabeth Brownlee | 22 | Daughter | — | Penna |
| 4 | William Brownlee | 23 | Son-in-law | Machinist | Penna |
| 5 | Betty M Brownlee | 2 | Daughter | — | Penna |
| 6 | Carol Ann Brownlee | 0 | Granddaughter | — | Penna |
| 7 | William H Brownlee | 3 | Son | — | Penna |
| 8 | James C Gabel | 26 | Head | Truck Driver | Penna |
| 9 | Alberta D Gabel | 25 | Wife | — | Penna |
| 10 | Dorothy Gabel | 4 | Daughter | — | Penna |
| 11 | Barbara A Gabel | 1 | Daughter | — | Penna |
| 12 | William Dillman | 34 | Head | Roofing | Delaware |
| 13 | Mary Dillman | 33 | Wife | — | Ireland |
| 14 | William C Dillman | 3 | Son | Roofer'S Helper | Penna |
| 15 | Ethel Dillman | 7 | Daughter | Stenographer | Penna |
| 16 | Mary Dillman | 9 | Daughter | — | Penna |
| 17 | Theodore Beanka | 15 | Lodger | Attendant | Maryland |
| 18 | John Coyle | 55 | Head | Attendant | Eire |
| 19 | Agnes Coyle | 51 | Wife | — | Eire |
| 20 | John Coyle | 27 | Son | Credit Clerk | Penna |
| 21 | Thomas Moffett | 62 | Head | Janitor | Penna |
| 22 | Mary Cassidy | 54 | Head | — | Penna |
| 23 | William Cassidy THIS PERSON | 25 | Son | Labor | Penna |
| 24 | John Cassidy | 23 | Son | Clerk | Penna |
| 25 | Mary Cassidy | 21 | Daughter | Operator | Penna |
| 26 | Catherine Cassidy | 18 | Daughter | Operator | Penna |
| 27 | Thomas Cassidy | 12 | Son | — | Penna |
| 28 | Patricia Cassidy | 8 | 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)