JC
John Cassidy — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Hudson-County, New Jersey
Our Model Tree links this John Cassidy across the 1920, 1930 and 1940 US Censuses in Hudson-County, New Jersey (XGBoost, ~Confirmed) — first a head (b.~1887), then head of a 3-person household.
Age 53
b. ~1887
Male
Head
Born: Scotland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Hudson-County, New Jersey |
| Surname | Cassidy |
| Given Name | John M. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 53 |
| Marital Status | Married |
| Birthplace | Scotland |
| 1935 Residence (City) | Jersey City |
| 1935 Residence (County) | Hudson |
| Naturalization Status | Naturalized |
| Additional Details | |
| Occupation | Medical Doctor |
| Industry | Private Practice |
| Class of Worker | OA |
| Hours Worked | 49 |
| Income (1939) | 5000 |
| Highest Grade | C 8 |
| 1935 Residence | Same house |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
| Occupation | Medical Doctor |
| Township / Ward | Jersey City |
| Est. Birth Year | ~1887 |
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 John | Age | Birth yr |
|---|---|---|---|---|
| John Cassidy | Head | — | 53 | ~1887 |
| John Cassidy | Son | — | 23 | ~1917 |
| Daisy Cassidy | Spouse | — | 54 | ~1886 |
Census Appearances
1920
Hudson, New …
Head, age 33
Hudson, New Jersey · implied b. ~1887 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cassidy |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 33 |
| Marital Status | Married |
| Birthplace | Scotland |
| Year of Immigration | 1907 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Scotland |
| Occupation | Medical Doctor |
| Industry | Own Practice |
| Class of Worker | OA |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Home Owned/Rented | O |
| Home Free/Mortgaged | M |
| Birth Country | Scotland |
| Year of Naturalization | 1912 |
| Birthplace (normalized) | scotland |
1930
Hudson, New …
Head, age 43
Hudson, New Jersey · implied b. ~1887 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cassidy |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 43 |
| Marital Status | Married |
| Birthplace | Scotland |
| Naturalization Status | Naturalized |
| Year of Immigration | 1900 |
| Age at First Marriage | 21 |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Scotland |
| Occupation | Engineer |
| Industry | Steam Railroad 7377 |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Home Owned/Rented | O |
| Home Value / Rent | 5000 |
| Radio Set | R |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
1940
Hudson-County, New …
Head, age 53
Hudson-County, New Jersey · implied b. ~1887 — 3 household members
| Surname | Cassidy |
| Given Name | John M. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 53 |
| Marital Status | Married |
| Birthplace | Scotland |
| 1935 Residence (City) | Jersey City |
| 1935 Residence (County) | Hudson |
| Naturalization Status | Naturalized |
| Occupation | Medical Doctor |
| Industry | Private Practice |
| Class of Worker | OA |
| Hours Worked | 49 |
| Income (1939) | 5000 |
| Highest Grade | C 8 |
| 1935 Residence | Same house |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
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 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
John Cassidy
Head · 1940 · age 53 · b. ~1887 · New Jersey
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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 — Hudson-County, New Jersey
Open full size
1940 US Federal Census — Hudson-County, New Jersey
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02404-00481)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Arthur G. Humphrey | 47 | Head | Director Of Phys Ed | New Jersey |
| 2 | Mary Humphrey | 37 | Wife | — | New Jersey |
| 3 | Arthur Humphrey | 10 | Son | — | New Jersey |
| 4 | Barbara Humphrey | 9 | Daughter | — | New Jersey |
| 5 | Donald Humphrey | 5 | Son | — | New Jersey |
| 6 | Anna Rogers | 69 | Mother-in-law | — | Eire |
| 7 | Anna The Sant | 57 | Head | Supervisor | New York |
| 8 | Ada The Sant | 59 | Sister | — | New York |
| 9 | Emily The Sant | 42 | Sister | Clerical Work | New Jersey |
| 10 | Mabel The Sant | 42 | Sister | — | New Jersey |
| 11 | Harry C. Corwin | 52 | Head | Salesman | New Jersey |
| 12 | Josephine Corwin | 48 | Wife | — | New York |
| 13 | Donald Corwin | 23 | Son | State Highway Inspector | New Jersey |
| 14 | Ida Corwin | 72 | Mother | — | New Jersey |
| 15 | Samuel Tartalsky | 42 | Head | Lawyer | Russia |
| 16 | Deborah Tartalsky | 37 | Wife | — | New York |
| 17 | Ruth D. Tartalsky | 15 | Daughter | — | New Jersey |
| 18 | Jeremiah Tartalsky | 5 | Son | — | New Jersey |
| 19 | Fred Keith | 66 | Head | Accountant | Illinois |
| 20 | Claire Keith | 68 | Wife | — | New York |
| 21 | Charles Newsome | 31 | Boarder | Assistant Foreman | Massachusetts |
| 22 | Edward Grisard | 33 | Boarder | Glass Packer | Pennsylvania |
| 23 | Larry J. Flynn | 35 | Boarder | Salesman | Ireland |
| 24 | Kenneth Wyatt | 21 | Boarder | Glass Worker | Pennsylvania |
| 25 | Louis Kretschmann | 70 | Head | Manager | Germany |
| 26 | Anna Kretschmann | 72 | Wife | — | New York |
| 27 | Harry Boyd | 70 | Head | Retired Ship Captain | New York |
| 28 | Elizabeth Boyd | 70 | Wife | — | Canada |
| 29 | Marion Richards | 40 | Daughter | — | Canada |
| 30 | Alvin Richards | 40 | Son-in-law | Clerical Worker | New Jersey |
| 31 | Martin Trisck | 77 | Head | Retired Vice Pres. | New Jersey |
| 32 | Elizabeth Trisck | 76 | Wife | — | Pennsylvania |
| 33 | John M. Cassidy THIS PERSON | 53 | Head | Medical Doctor | Scotland |
| 34 | Daisy M. Cassidy | 54 | Wife | — | New York |
| 35 | John M. Cassidy | 23 | Son | — | New York |
| 36 | Nathan Feldman | 46 | Head | Salesman | Poland |
| 37 | Hannah Feldman | 41 | Wife | — | New York |
| 38 | Gloria M. Feldman | 13 | Daughter | — | New Jersey |
| 39 | Elliot A. Feldman | 12 | Son | — | New Jersey |
| 40 | Helen S. Feldman | 9 | Daughter | — | New Jersey |
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)