JC
John Cassidy — 1940 US Census Record
Model Tree available1940 United States Federal Census · Will-County, Illinois
Our Model Tree links this John Cassidy across the 1910, 1920, 1930 and 1940 US Censuses in Will-County, Illinois (XGBoost, ~Confirmed), with identified parents Charles & Charles — first a head (b.~1902), then head of a 5-person household.
Age 38
b. ~1902
Male
Head
Born: Illinois
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Will-County, Illinois |
| Surname | Cassidy |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 38 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Joliet City |
| 1935 Residence (County) | Will |
| Additional Details | |
| Occupation | clerk |
| Industry | Dept of Hwy |
| Class of Worker | GW |
| Hours Worked | 46 |
| Income (1939) | 2375 |
| Highest Grade | Hs 2 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Clerk |
| Township / Ward | Joliet City |
| Est. Birth Year | ~1902 |
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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| John Cassidy | Head | — | 38 | ~1902 |
| Jack Cassidy | Son | — | 12 | ~1928 |
| Charles Cassidy | Son | — | 10 | ~1930 |
| Robert Cassidy | Son | — | 5 | ~1935 |
| Louise Cassidy | Spouse | — | 34 | ~1906 |
Census Appearances
1910
Will, Illinois
Son, age 8
Will, Illinois · implied b. ~1902 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cassidy |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 8 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1920
Will, Illinois
Son, age 17
Will, Illinois · implied b. ~1903 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cassidy |
| Given Name | John J. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Occupation | Laborer |
| Industry | Steel Co |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Will, Illinois
Head, age 28
Will, Illinois · implied b. ~1902 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cassidy |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 28 |
| Marital Status | Married |
| Birthplace | Illinois |
| Age at First Marriage | 24 |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Occupation | Meter man |
| Industry | Electric shop |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 53 |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Will-County, Illinois
Head, age 38
Will-County, Illinois · implied b. ~1902 — 5 household members
| Surname | Cassidy |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 38 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Joliet City |
| 1935 Residence (County) | Will |
| Occupation | clerk |
| Industry | Dept of Hwy |
| Class of Worker | GW |
| Hours Worked | 46 |
| Income (1939) | 2375 |
| Highest Grade | Hs 2 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
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 John Cassidy across 4 US Census years (1910, 1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Charles Cassidy (~0.92 confidence) and father Charles Cassidy (~0.92 confidence) and mother Nellie Cassidy (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Charles Cassidy
b. ~1870
Source father
● Household
· direct · ~0.92
Father
Charles Cassidy
b. ~1871
Source father
● Household
· direct · ~0.92
Mother
Nellie Cassidy
b. ~1871
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Cassidy
Head · 1940 · age 38 · b. ~1902 · Illinois
★ 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 — Will-County, Illinois
Open full size
1940 US Federal Census — Will-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00907-00815)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Anna Wheeler | 59 | Mother-in-law | None | England |
| 42 | Kenneth Chappell | 38 | Head | Accountant | Wisconsin |
| 43 | Dorothy Chappell | 34 | Wife | Bookkeeper | Wisconsin |
| 44 | Joan Chappell | 17 | Daughter | None | Wisconsin |
| 45 | Joseph Stukel | 72 | Head | None | Slovenia |
| 46 | Anna Stukel | 68 | Wife | None | Slovenia |
| 47 | John Cassidy THIS PERSON | 38 | Head | Clerk | Illinois |
| 48 | Louise Cassidy | 34 | Wife | None | Illinois |
| 49 | Jack Cassidy | 12 | Son | None | Illinois |
| 50 | Charles Cassidy | 10 | Son | None | Illinois |
| 51 | Robert Cassidy | 5 | Son | None | Illinois |
| 52 | Louis Hill | 60 | Head | Clerk | Illinois |
| 53 | Isabelle Hill | 50 | Wife | Teacher | Illinois |
| 54 | Violet Hill | 36 | Daughter | Teacher | Illinois |
| 55 | Ralph Wallach | 70 | Brother | None | New York |
| 56 | Maurice Geary | 37 | Head | Sales Manager | Minnesota |
| 57 | Rosa Geary | 26 | Wife | None | Iowa |
| 58 | Emil Pavea | 56 | Head | Brewmaster | Bohemia |
| 59 | Cathrine Stukel | 71 | Head | None | Austria |
| 60 | Anthony Stukel | 33 | Son | Printer | Illinois |
| 61 | Mary Bluemel | 43 | Daughter | Laborer | Illinois |
| 62 | Elizabeth Barthelme | 72 | Head | None | Illinois |
| 63 | John Barthelme | 47 | Son | None | Illinois |
| 64 | Martin Pershey | 43 | Head | Laborer | Illinois |
| 65 | Linda Pershey | 48 | Daughter | None | Illinois |
| 66 | Robert Pershey | 21 | Child | Machinist | Illinois |
| 67 | Richard Pershey | 17 | Child | None | Illinois |
| 68 | Lavern Pershey | 14 | Child | None | Illinois |
| 69 | Louis Barthelme | 48 | Head | Straighten | Illinois |
| 70 | Mary Barthelme | 39 | Wife | None | Illinois |
| 71 | Ernal Barthelme | 21 | Daughter | Floor Lady | Illinois |
| 72 | Louis Jr. Barthelme | 15 | Son | None | Illinois |
| 73 | Robert Rose | 26 | Head | Printer Helper | Iowa |
| 74 | Gertrude Rose | 26 | Wife | None | Illinois |
| 75 | Roberta Rose | 5 | Daughter | None | Illinois |
| 76 | Elizabeth Stukich | 58 | Head | None | Austria |
| 77 | Mary Schorp | 72 | Head | None | Germany |
| 78 | Joseph Schorp | 48 | Son | Bar Tender | Illinois |
| 79 | Richard Schorp | 18 | Son | None | Illinois |
| 80 | Patrick Barrett | 79 | Head | None | Ireland |
Pedigree Summary
John
Gen 1 · 3 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)