JC
John Cassidy — 1940 US Census Record
Model Tree available1940 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), with identified parents Mary & Peter — first a son (b.~1910), then head of a 6-person household.
Age 30
b. ~1910
Male
Son
Born: New Jersey
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Hudson-County, New Jersey |
| Surname | Cassidy |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 30 |
| Marital Status | Single |
| Birthplace | New Jersey |
| 1935 Residence (City) | Kearny Town |
| 1935 Residence (County) | Hudson |
| Additional Details | |
| Occupation | Machinist |
| Industry | Thread Co. |
| Class of Worker | PW |
| Hours Worked | 35 |
| Income (1939) | 1600 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
| Occupation | Machinist |
| Township / Ward | Kearny Town |
| Est. Birth Year | ~1910 |
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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Mary Cassidy | Daughter | — | 40 | ~1900 |
| Mary Cassidy | Head | — | 66 | ~1874 |
| James Clark | Other | — | 14 | ~1926 |
| Malcom Stevens | Other | — | 40 | ~1900 |
| Thomas Cassidy | Son | — | 36 | ~1904 |
| John Cassidy | Son | — | 30 | ~1910 |
Census Appearances
1920
Hudson, New …
Son, age 10
Hudson, New Jersey · implied b. ~1910 — 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 | 10 |
| Marital Status | Single |
| Birthplace | New Jersey |
| Father's Birthplace | New Jersey |
| Mother's Birthplace | New York |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
1930
Hudson, New …
Son, age 19
Hudson, New Jersey · implied b. ~1911 — 8 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 | 19 |
| Marital Status | Single |
| Birthplace | New Jersey |
| Father's Birthplace | New Jersey |
| Mother's Birthplace | New York |
| Occupation | Apprentice Bricklayer |
| Industry | Construction |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
1940
Hudson-County, New …
Son, age 30
Hudson-County, New Jersey · implied b. ~1910 — 6 household members
| Surname | Cassidy |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 30 |
| Marital Status | Single |
| Birthplace | New Jersey |
| 1935 Residence (City) | Kearny Town |
| 1935 Residence (County) | Hudson |
| Occupation | Machinist |
| Industry | Thread Co. |
| Class of Worker | PW |
| Hours Worked | 35 |
| Income (1939) | 1600 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
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. Identified parents: mother Mary Cassidy (~0.92 confidence) and father Peter Cassidy (~0.92 confidence) and mother Catherine Cassidy (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Mary Cassidy
b. ~1874
Source mother
● Household
· direct · ~0.92
Father
Peter Cassidy
b. ~1880
Source father
● Household
· direct · ~0.92
Mother
Catherine Cassidy
b. ~1884
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Cassidy
Son · 1940 · age 30 · b. ~1910 · New Jersey
★ You are viewing this record
Sibling
Mary Cassidy
Sibling · 1940 · age 40
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas Cassidy
Sibling · 1940 · age 36
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 — 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-t0627-02350-00233)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Thomas Branigan | 62 | Head | Mechanic | New York |
| 2 | Mary (B) Branigan | 61 | Wife | — | Eire |
| 3 | Florence Branigan | 30 | Daughter | Stenographer | New Jersey |
| 4 | Peter Christopher | 60 | Head | — | Norway |
| 5 | Ester (L) Christopher | 55 | Wife | — | New York |
| 6 | Peter Christopher | 25 | Son | — | New Jersey |
| 7 | Charles Dahlquist | 74 | Head | — | Sweden |
| 8 | Josephine Dahlquist | 70 | Wife | — | Sweden |
| 9 | Mary (W) Cassidy | 66 | Head | — | Ireland |
| 10 | Mary Cassidy | 40 | Daughter | — | New Jersey |
| 11 | Thomas Cassidy | 36 | Son | Accountant | New Jersey |
| 12 | John Cassidy THIS PERSON | 30 | Son | Machinist | New Jersey |
| 13 | James Clark | 14 | Nephew | — | New York |
| 14 | Malcom Stevens | 40 | Boarder | Truck Driver | Scotland |
| 15 | Charles Krause | 42 | Head | Salesman | New York |
| 16 | Anna (M) Krause | 43 | Wife | — | New York |
| 17 | Andrew Krause | 16 | Son | — | New Jersey |
| 18 | Philip Glassman | 40 | Head | Store Manager | Russia |
| 19 | Molly Glassman | 36 | Wife | — | New Jersey |
| 20 | Gordon Glassman | 14 | Son | — | New Jersey |
| 21 | Norman Glassman | 10 | Son | — | New Jersey |
| 22 | Gloria Glassman | 7 | Daughter | — | New Jersey |
| 23 | Jay Klugman | 1 | Nephew | — | New Jersey |
| 24 | William Delaney | 46 | Head | Machinist | New Jersey |
| 25 | Mary (A) Delaney | 44 | Wife | — | New Jersey |
| 26 | Edith Delaney | 16 | Daughter | Timekeeper | New Jersey |
| 27 | William Delaney | 23 | Son | Iron Tray Helper | New Jersey |
| 28 | James Delaney | 22 | Son | — | New Jersey |
| 29 | Paul (W) Baumann | 54 | Head | Toolmaker | Germany |
| 30 | Anna Baumann | 52 | Wife | Sewing Machine Operator | Germany |
| 31 | Renate Baumann | 7 | Daughter | — | Germany |
| 32 | Wilbur Harvey | 34 | Head | Draftsman | New York |
| 33 | Clara (W) Harvey | 34 | Wife | — | New Jersey |
| 34 | Norman Harvey | 9 | Son | — | New Jersey |
| 35 | Dorothy Harvey | 7 | Daughter | — | New Jersey |
| 36 | Walter Silvery | 40 | Head | Salesman | Mass. |
| 37 | Rose Silvery | 37 | Wife | — | New Jersey |
| 38 | Walter Silvery | 18 | Son | Special Delivery Boy | New Jersey |
| 39 | James Silvery | 17 | Son | — | New Jersey |
| 40 | Wilfred (H) Senior | 38 | Head | Policeman | England |
Pedigree Summary
John + 2 siblings
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)