JC
John Cassidy — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Kings-County, New York
Our Model Tree links this John Cassidy across the 1930 and 1940 US Censuses in Kings-County, New York (XGBoost, ~Confirmed) — first a son (b.~1930), then head of a 10-person household.
Age 10
b. ~1930
Male
Son
Born: New York
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Kings-County, New York |
| Surname | Cassidy |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | New York |
| 1935 Residence (City) | New York City |
| 1935 Residence (County) | Kings |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | No 5 |
| 1935 Residence | Same place |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
| Township / Ward | New York City |
| Est. Birth Year | ~1930 |
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.
10 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Ellen Cassidy | Daughter | — | 3 | ~1937 |
| Mary Cassidy | Daughter | — | 9 | ~1931 |
| Hugh Cassidy | Head | — | 36 | ~1904 |
| Hugh Cassidy | Son | — | 14 | ~1926 |
| John Cassidy | Son | — | 10 | ~1930 |
| James Cassidy | Son | — | 13 | ~1927 |
| Thomas Cassidy | Son | — | 7 | ~1933 |
| Raymond Cassidy | Son | — | 5 | ~1935 |
| Gerard Cassidy | Son | — | ~1940 | |
| Winifred Cassidy | Spouse | — | 38 | ~1902 |
Census Appearances
1930
Kings, New …
Son, age
Kings, New York · implied b. ~1930 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cassidy |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 0 |
| Marital Status | Single |
| Birthplace | New York |
| Father's Birthplace | Irish Free State |
| Mother's Birthplace | Irish Free State |
| Can Read/Write | Yes |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
1940
Kings-County, New …
Son, age 10
Kings-County, New York · implied b. ~1930 — 10 household members
| Surname | Cassidy |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | New York |
| 1935 Residence (City) | New York City |
| 1935 Residence (County) | Kings |
| Income (1939) | 0 |
| Highest Grade | No 5 |
| 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 John Cassidy across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Cassidy
Son · 1940 · age 10 · b. ~1930 · New York
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Sibling
Gerard Cassidy
Sibling · 1940 · age
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Hugh Cassidy
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ellen Cassidy
Sibling · 1940 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Cassidy
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Cassidy
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas Cassidy
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Raymond Cassidy
Sibling · 1940 · age 5
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 — Kings-County, New York
Open full size
1940 US Federal Census — Kings-County, New York
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02571-00471)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Andy Johnson | 43 | Head | Rigger | Sweden |
| 42 | Ellen Johnson | 44 | Wife | — | Sweden |
| 43 | Adam Wagner | 44 | Head | Mechanic | Austria |
| 44 | Katherine Wagner | 43 | Wife | — | New York |
| 45 | Elizabeth Wagner | 19 | Daughter | Clerical | New York |
| 46 | Catherine Wagner | 16 | Daughter | — | New York |
| 47 | Richard Wagner | 11 | Son | — | New York |
| 48 | Susan Mcdevitt | 49 | Head | — | New York |
| 49 | Charles Mcdevitt | 27 | Son | Clerk | New York |
| 50 | John Mcgowan | 34 | Son-in-law | Laborer | Ireland |
| 51 | Grace Mcgowan | 29 | Daughter | — | New York |
| 52 | John Mcgowan | 4 | Grandson | — | New York |
| 53 | James Mcgowan | 1 | Grandson | — | New York |
| 54 | Philip Pinkerton | 45 | Head | On Relief | New York |
| 55 | Teresa Pinkerton | 45 | Wife | — | New York |
| 56 | James Pinkerton | 18 | Son | — | New York |
| 57 | Teresa Pinkerton | 17 | Daughter | — | New York |
| 58 | William Pinkerton | 15 | Son | — | New York |
| 59 | Dorothy Pinkerton | 12 | Daughter | — | New York |
| 60 | John Pinkerton | 5 | Son | — | New York |
| 61 | Hugh Cassidy | 36 | Head | Motorman | Ireland |
| 62 | Winifred Cassidy | 38 | Wife | — | Ireland |
| 63 | Hugh Cassidy | 14 | Son | — | New York |
| 64 | James Cassidy | 13 | Son | — | New York |
| 65 | John Cassidy THIS PERSON | 10 | Son | — | New York |
| 66 | Mary Cassidy | 9 | Daughter | — | New York |
| 67 | Thomas Cassidy | 7 | Son | — | New York |
| 68 | Raymond Cassidy | 5 | Son | — | New York |
| 69 | Ellen Cassidy | 3 | Daughter | — | New York |
| 70 | Gerard Cassidy | 0 | Son | — | New York |
| 71 | Clara Haase | 36 | Head | Housework | Norway |
| 72 | Erling Haase | 11 | Son | — | New York |
| 73 | Thelma Haase | 9 | Daughter | — | New York |
| 74 | Rolf Solhaug | 32 | Lodger | Deck Builder | Norway |
| 75 | Edward Stockholm | 38 | Head | Installer | New York |
| 76 | Eleanor Stockholm | 35 | Wife | — | New York |
| 77 | Bernice Stockholm | 17 | Son | — | New York |
| 78 | Edward Stockholm | 15 | Son | — | New York |
| 79 | Jean Stockholm | 12 | Daughter | — | New York |
| 80 | Patrick Donnelly | 73 | Head | Watchman | New York |
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)