MC
Mary Cassidy — 1940 US Census Record
Model Tree available1940 United States Federal Census · Hudson-County, New Jersey
Our Model Tree links this Mary Cassidy across the 1920, 1930 and 1940 US Censuses in Hudson-County, New Jersey (XGBoost, ~Confirmed), with identified parents Joseph & Nora — first a spouse (b.~1910), then head of a 5-person household.
Age 30
b. ~1910
Female
Spouse
Born: New Jersey
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Hudson-County, New Jersey |
| Surname | Cassidy |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 30 |
| Marital Status | Married |
| Birthplace | New Jersey |
| 1935 Residence (City) | Jersey City |
| 1935 Residence (County) | Hudson |
| Additional Details | |
| Class of Worker | 0 |
| Highest Grade | H-1 |
| 1935 Residence | Same Place |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
| Township / Ward | Jersey City |
| 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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| John Cassidy | Head | — | 36 | ~1904 |
| Michael Crotty | Other | — | 58 | ~1882 |
| Robert Cassidy | Son | — | 2 | ~1938 |
| John Cassidy | Son | — | 1 | ~1939 |
| Mary Cassidy | Spouse | — | 30 | ~1910 |
Census Appearances
1920
Hudson, New …
Daughter, age 9
Hudson, New Jersey · implied b. ~1911 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cassidy |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 9 |
| Marital Status | Single |
| Birthplace | New Jersey |
| Father's Birthplace | New Jersey |
| Mother's Birthplace | Pennsylvania |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
1930
Hudson, New …
Daughter, age 19
Hudson, New Jersey · implied b. ~1911 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cassidy |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | New Jersey |
| Father's Birthplace | New Jersey |
| Mother's Birthplace | Pennsylvania |
| Occupation | Clerk |
| Industry | Office Work |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
1940
Hudson-County, New …
Spouse, age 30
Hudson-County, New Jersey · implied b. ~1910 — 5 household members
| Surname | Cassidy |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 30 |
| Marital Status | Married |
| Birthplace | New Jersey |
| 1935 Residence (City) | Jersey City |
| 1935 Residence (County) | Hudson |
| Class of Worker | 0 |
| Highest Grade | H-1 |
| 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 Mary Cassidy across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Joseph Cassidy (~0.92 confidence) and mother Nora Cassidy (~0.92 confidence) and mother Rose Cassidy (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Joseph Cassidy
b. ~1880
Source father
● Household
· direct · ~0.92
Mother
Nora Cassidy
b. ~1880
Source mother
● Household
· direct · ~0.92
Mother
Rose Cassidy
b. ~1881
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Cassidy
Spouse · 1940 · age 30 · b. ~1910 · New Jersey
★ 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 — 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-t0627-02410-00409)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Harry Maresca | 36 | Head | Painter | New Jersey |
| 42 | Antoinette Maresca | 30 | Wife | Dress Maker | New Jersey |
| 43 | Carol Ann Maresca | 2 | Daughter | — | New Jersey |
| 44 | Lucy Politano | 56 | Mother-in-law | New Worker | New Jersey |
| 45 | Leslie Groom | 43 | Head | Lamp Inspector | New York |
| 46 | Anna Groom | 30 | Wife | — | New Jersey |
| 47 | Jean Groom | 4 | Daughter | — | New Jersey |
| 48 | Barbara Arzt | 45 | Head | House Work | Austria |
| 49 | Louise Arzt | 16 | Daughter | — | New York |
| 50 | Kathryne Arzt | 15 | Daughter | Stenographer | New York |
| 51 | Harry Thomson | 38 | Head | Candy Store Owner | New York |
| 52 | Frances Thomson | 40 | Wife | — | New York |
| 53 | Diedrich Nieman | 69 | Head | Grocer | Germany |
| 54 | George Commerford | 33 | Head | Bill Posting Clerk | New Jersey |
| 55 | Margaret Commerford | 30 | Wife | — | New Jersey |
| 56 | George Jr. Commerford | 2 | Son | — | New Jersey |
| 57 | John Cassidy | 36 | Head | Boiler Maker Helper | New Jersey |
| 58 | Mary Cassidy THIS PERSON | 30 | Wife | — | New Jersey |
| 59 | Robert Cassidy | 2 | Son | — | New Jersey |
| 60 | John Jr. Cassidy | 1 | Son | — | New Jersey |
| 61 | Michael Crotty | 58 | Father-in-law | Presenter | Ireland |
| 62 | Salvatore Gugliotta | 64 | Head | Shoemaker | Italy |
| 63 | Sara Gugliotta | 55 | Wife | — | Italy |
| 64 | Adeline Gugliotta | 30 | Daughter | Substitute Teacher | New Jersey |
| 65 | Emelia Gugliotta | 26 | Daughter | Bookkeeper | New York |
| 66 | Helen Gugliotta | 22 | Daughter | Substitute Teacher | New Jersey |
| 67 | Victoria Gugliotta | 19 | Daughter | Beautician | New Jersey |
| 68 | William Boldewin | 51 | Head | Baker | Germany |
| 69 | Pauline Boldewin | 33 | Wife | — | Germany |
| 70 | Bertram Boldewin | 17 | Son | New Worker | New Jersey |
| 71 | Anita Boldewin | 13 | Daughter | — | New Jersey |
| 72 | Al. Palomiotti | 39 | Head | Plater | Italy |
| 73 | Lora Palomiotti | 27 | Wife | — | Italy |
| 74 | Nicholas Palomiotti | 1 | Son | — | New Jersey |
| 75 | Joseph Roberts | 53 | Head | Pressman | New York |
| 76 | Josephine Roberts | 52 | Wife | — | New Jersey |
| 77 | Walter Roberts | 22 | Son | Book Keeper | New Jersey |
| 78 | Frank Tortoriello | 35 | Head | Taxi Driver | New Jersey |
| 79 | Mary Tortoriello | 23 | Wife | Labour | Illinois |
| 80 | Frances Tortoriello | 3 | Daughter | — | New Jersey |
Pedigree Summary
Mary
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)