MC
Mary Cassidy — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Bronx-County, New York
Our Model Tree links this Mary Cassidy across the 1930 and 1940 US Censuses in Bronx-County, New York (XGBoost, ~Confirmed) — first a daughter (b.~1919), then head of a 9-person household.
Age 21
b. ~1919
Female
Daughter
Born: New York
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Bronx-County, New York |
| Surname | Cassidy |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | New York |
| 1935 Residence (City) | New York City |
| 1935 Residence (County) | Bronx |
| Additional Details | |
| Occupation | Cashier |
| Industry | Consolidated Edison Co |
| Class of Worker | PW |
| Hours Worked | 36 |
| Income (1939) | 216 |
| Highest Grade | H-4 |
| 1935 Residence | Same place |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
| Occupation | Cashier |
| Township / Ward | New York City |
| Est. Birth Year | ~1919 |
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.
9 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Ann Cassidy | Daughter | — | 24 | ~1916 |
| Mary Cassidy | Daughter | — | 21 | ~1919 |
| Michael Cassidy | Head | — | 60 | ~1880 |
| Gerard Cassidy | Son | — | 12 | ~1928 |
| Henry Cassidy | Son | — | 26 | ~1914 |
| James Cassidy | Son | — | 16 | ~1924 |
| Michael Cassidy | Son | — | 22 | ~1918 |
| Edward Cassidy | Son | — | 19 | ~1921 |
| Ann Cassidy | Spouse | — | 49 | ~1891 |
Census Appearances
1930
Bronx, New …
Daughter, age 12
Bronx, New York · implied b. ~1918 — 11 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cassidy |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | New York |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Can Read/Write | Yes |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
1940
Bronx-County, New …
Daughter, age 21
Bronx-County, New York · implied b. ~1919 — 9 household members
| Surname | Cassidy |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | New York |
| 1935 Residence (City) | New York City |
| 1935 Residence (County) | Bronx |
| Occupation | Cashier |
| Industry | Consolidated Edison Co |
| Class of Worker | PW |
| Hours Worked | 36 |
| Income (1939) | 216 |
| Highest Grade | H-4 |
| 1935 Residence | Same place |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
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 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Cassidy
Daughter · 1940 · age 21 · b. ~1919 · New York
★ You are viewing this record
Sibling
James Cassidy
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Edward Cassidy
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Henry Cassidy
Sibling · 1940 · age 26
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Michael Cassidy
Sibling · 1940 · age 22
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Gerard Cassidy
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ann Cassidy
Sibling · 1940 · age 24
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 — Bronx-County, New York
Open full size
1940 US Federal Census — Bronx-County, New York
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02466-00927)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Albert Skontz | 42 | Head | Fireman | New York |
| 2 | Nina Skontz | 40 | Wife | — | New York |
| 3 | Beverly Skontz | 14 | Daughter | — | New York |
| 4 | Lawrence Skontz | 11 | Son | — | New York |
| 5 | Jacob X Apelberg | 64 | Head | Janitor | Latvia |
| 6 | Amelia Apelberg | 60 | Wife | — | Latvia |
| 7 | Hubert Reynolds | 39 | Head | Manager | Eire |
| 8 | Maureen Reynolds | 34 | Wife | — | Eire |
| 9 | Mary L Reynolds | 4 | Daughter | — | New York |
| 10 | Patricia A Reynolds | 2 | Daughter | — | New York |
| 11 | Hubert J Reynolds | 1 | Son | — | New York |
| 12 | Charles Lockman | 60 | Head | Oiler | New York |
| 13 | Ruth Lockman | 46 | Wife | — | Vermont |
| 14 | Phyllis Thompson | 20 | Daughter | Clerk | Mass |
| 15 | Ella Thompson | 66 | Mother in law | — | Vermont |
| 16 | Mary Thompson | 43 | Sister in law | Waiter | Vermont |
| 17 | Geraldine Thompson | 39 | Sister in law | Clerk | Vermont |
| 18 | William Sullivan | 39 | Head | Consolidation Edison Co | New York |
| 19 | Anita Sullivan | 37 | Wife | — | New York |
| 20 | Anne M Sullivan | 13 | Daughter | — | New York |
| 21 | William Sullivan | 9 | Son | — | New York |
| 22 | Gerard Sullivan | 9 | Son | — | New York |
| 23 | Michael Cassidy | 60 | Head | Conductor | Eire |
| 24 | Ann Cassidy | 49 | Wife | — | Eire |
| 25 | Henry Cassidy | 26 | Son | Clerk | New York |
| 26 | Ann Cassidy | 24 | Daughter | Stenographer | New York |
| 27 | Michael Cassidy | 22 | Son | Usher | New York |
| 28 | Mary Cassidy THIS PERSON | 21 | Daughter | Cashier | New York |
| 29 | Edward Cassidy | 19 | Son | — | New York |
| 30 | James Cassidy | 16 | Son | — | New York |
| 31 | Gerard Cassidy | 12 | Son | — | New York |
| 32 | George Frehman | 43 | Head | Bus Driver | New York |
| 33 | Mary Frehman | 41 | Wife | — | New York |
| 34 | Elizabeth Frehman | 20 | Daughter | Examiner | New York |
| 35 | Margaret Frehman | 19 | Daughter | Examiner | New York |
| 36 | Georgette Frehman | 9 | Daughter | — | New York |
| 37 | Elizabeth Carroll | 73 | Mother in law | — | New York |
| 38 | Thomas Scott | 57 | Head | Elevator Operator | Scotland |
| 39 | Margaret Scott | 51 | Wife | — | Scotland |
| 40 | Anna Scott | 28 | Daughter | Clerk | California |
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)