MC
Mary Cassidy — 1940 US Census Record
Model Tree available1940 United States Federal Census · New-York-County, New York
Our Model Tree links this Mary Cassidy across the 1920, 1930 and 1940 US Censuses in New-York-County, New York (XGBoost, ~Confirmed), with identified parents Ellen & John — first a daughter (b.~1910), then head of a 4-person household.
Age 30
b. ~1910
Female
Daughter
Born: New York
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | New-York-County, New York |
| Surname | Cassidy |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 30 |
| Marital Status | Single |
| Birthplace | New York |
| 1935 Residence (City) | New York |
| 1935 Residence (County) | New York |
| Additional Details | |
| Occupation | Telephone Operator |
| Industry | Telephone |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1700 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
| Occupation | Telephone Operator |
| Township / Ward | Manhattan |
| 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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Cassidy | Daughter | — | 30 | ~1910 |
| John Cassidy | Head | — | 56 | ~1884 |
| Charles Cassidy | Son | — | 21 | ~1919 |
| Ellen Cassidy | Spouse | — | 56 | ~1884 |
Census Appearances
1920
New York, …
Daughter, age 10
New York, New York · implied b. ~1910 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cassidy |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | New York |
| Father's Birthplace | New Jersey |
| Mother's Birthplace | Ireland |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
1930
New York, …
Daughter, age 20
New York, New York · implied b. ~1910 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cassidy |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | New York |
| Father's Birthplace | New Jersey |
| Mother's Birthplace | Irish Free State |
| Occupation | Telephone Operator |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
1940
New-York-County, New …
Daughter, age 30
New-York-County, New York · implied b. ~1910 — 4 household members
| Surname | Cassidy |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 30 |
| Marital Status | Single |
| Birthplace | New York |
| 1935 Residence (City) | New York |
| 1935 Residence (County) | New York |
| Occupation | Telephone Operator |
| Industry | Telephone |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1700 |
| 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 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Ellen Cassidy (~0.92 confidence) and father John Cassidy (~0.92 confidence) and mother Ellen Cassidy (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Ellen Cassidy
b. ~1884
Source mother
● Household
· direct · ~0.92
Father
John Cassidy
b. ~1884
Source father
● Household
· direct · ~0.92
Mother
Ellen Cassidy
b. ~1885
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Cassidy
Daughter · 1940 · age 30 · b. ~1910 · New York
★ You are viewing this record
Sibling
Charles Cassidy
Sibling · 1940 · age 21
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 — New-York-County, New York
Open full size
1940 US Federal Census — New-York-County, New York
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02642-00949)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Irene Schmutz | 29 | Daughter | — | New York |
| 42 | Rudolph Schmutz | 26 | Son | Service Man | New York |
| 43 | William Schmutz | 24 | Son | — | New York |
| 44 | Thomas Greene | 49 | Head | Elevator Operator | New York |
| 45 | Margaret Greene | 45 | Wife | — | New York |
| 46 | Henry Greene | 21 | Son | Elevator Operator | New York |
| 47 | Catherine Greene | 20 | Daughter | Clerk | New York |
| 48 | Margaret Uhlig | 74 | Head | — | New York |
| 49 | Grace Uhlig | 44 | Daughter | Floor Lady | New York |
| 50 | Michael Woods | 62 | Head | Cement Finisher | Ireland |
| 51 | Rose Woods | 57 | Wife | — | Ireland |
| 52 | Catherine Woods | 26 | Daughter | Stenographer | New York |
| 53 | Eugene Woods | 25 | Son | Helper | New York |
| 54 | John Cassidy | 56 | Head | Porter | New Jersey |
| 55 | Ellen Cassidy | 56 | Wife | — | Ireland |
| 56 | Mary Cassidy THIS PERSON | 30 | Daughter | Telephone Operator | New York |
| 57 | Charles Cassidy | 21 | Son | Delivery | New York |
| 58 | Margaret Wagner | 29 | Head | — | New York |
| 59 | Edward Wagner | 9 | Son | — | New York |
| 60 | James Gilligan | 72 | Head | — | Ireland |
| 61 | Hanna Gilligan | 65 | Wife | — | Ireland |
| 62 | Anne Gilligan | 27 | Daughter | Teacher | New York |
| 63 | Otto Tenen | 44 | Head | Lessee | Germany |
| 64 | Martha Tenen | 35 | Wife | — | Germany |
| 65 | Horst Tenen | 18 | Son | — | Germany |
| 66 | Waldo Tenen | 17 | Son | — | Germany |
| 67 | Sonia Tenen | 14 | Daughter | — | Germany |
| 68 | Isabell Anello | 23 | Head | — | So. Carolina |
| 69 | Victor Anello | 23 | Husband | Elevator Operator | New York |
| 70 | Albert Wein | 25 | Head | Artist | New York |
| 71 | Ethel Allen | 65 | Head | — | Germany |
| 72 | Catherine Todd | 40 | Head | Sales | Ireland |
| 73 | Walter Hintz | 34 | Head | Chef | Germany |
| 74 | Rose Hintz | 26 | Wife | Waitress | Germany |
| 75 | William Teaffi | 52 | Head | Musician | England |
| 76 | Jemma Teaffi | 51 | Wife | — | Canada |
| 77 | Paul Mierisch | 72 | Head | — | Germany |
| 78 | Charles La Follette | 43 | Head | Musician | Washington |
| 79 | Norther La Follette | 38 | Wife | Piano | California |
| 80 | Frederick Grant | 34 | Head | Chauffeur | New Mexico |
Related Census Records
Pedigree Summary
Mary + 1 sibling
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)