JC
John Cassidy — 1940 US Census Record
Model Tree available1940 United States Federal Census · Denver-County, Colorado
Our Model Tree links this John Cassidy across the 1920, 1930 and 1940 US Censuses in Denver-County, Colorado (XGBoost, ~Confirmed), with identified parents Charles & Anna — first a son (b.~1913), then head of a 5-person household.
Age 27
b. ~1913
Male
Son
Born: Colorado
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Denver-County, Colorado |
| Surname | Cassidy |
| Given Name | John F. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Single |
| Birthplace | Colorado |
| 1935 Residence (City) | Denver City |
| 1935 Residence (County) | Denver |
| Additional Details | |
| Occupation | Secretary |
| Industry | Wholesale Hardware |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 1500 |
| Highest Grade | C 4 |
| 1935 Residence | Same place |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
| Occupation | Secretary |
| Township / Ward | Denver City |
| Est. Birth Year | ~1913 |
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 John | Age | Birth yr |
|---|---|---|---|---|
| Charles Cassidy | Head | — | 56 | ~1884 |
| Frank Kawabata | Other | — | 60 | ~1880 |
| Charles Cassidy | Son | — | 23 | ~1917 |
| John Cassidy | Son | — | 27 | ~1913 |
| Charles Cassidy | Son | — | 25 | ~1915 |
Census Appearances
1920
Denver, Colorado
Son, age 8
Denver, Colorado · implied b. ~1912 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cassidy |
| Given Name | John F. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 8 |
| Marital Status | Single |
| Birthplace | Colorado |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Pennsylvania |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
1930
Denver, Colorado
Son, age 18
Denver, Colorado · implied b. ~1912 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cassidy |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Colorado |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Pennsylvania |
| Can Read/Write | Yes |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
1940
Denver-County, Colorado
Son, age 27
Denver-County, Colorado · implied b. ~1913 — 5 household members
| Surname | Cassidy |
| Given Name | John F. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Single |
| Birthplace | Colorado |
| 1935 Residence (City) | Denver City |
| 1935 Residence (County) | Denver |
| Occupation | Secretary |
| Industry | Wholesale Hardware |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 1500 |
| Highest Grade | C 4 |
| 1935 Residence | Same place |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
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: father Charles Cassidy (~0.92 confidence) and mother Anna Cassidy (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Charles Cassidy
b. ~1884
Source father
● Household
· direct · ~0.92
Mother
Anna Cassidy
b. ~1887
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Cassidy
Son · 1940 · age 27 · b. ~1913 · Colorado
★ You are viewing this record
Sibling
Charles Cassidy
Sibling · 1940 · age 23
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Charles Cassidy
Sibling · 1940 · age 25
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 — Denver-County, Colorado
Open full size
1940 US Federal Census — Denver-County, Colorado
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00488-00258)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Elda Fisher | 74 | Lodger | Stenographer | Illinois |
| 2 | Ralph Rundell | 42 | Head | — | New York |
| 3 | Mabel Rundell | 50 | Wife | — | Iowa |
| 4 | William Rundell | 23 | Son | Delivery | Nebraska |
| 5 | Forest Dayton | 52 | Lodger | Machinist | New York |
| 6 | Robert Dayton | 19 | Lodger | — | Colorado |
| 7 | William Hatch | None | Lodger | — | Montana |
| 8 | Cyrus Matthews | 55 | Lodger | Train Master | Colorado |
| 9 | Elsie Matthews | 53 | Lodger | — | Colorado |
| 10 | Doris Boyles | 71 | Lodger | Stenographer | Nebraska |
| 11 | John Ager | 33 | Lodger | Designer | Ohio |
| 12 | Joan Halloran | 40 | Lodger | — | Pennsylvania |
| 13 | William Halloran | 18 | Lodger | — | Pennsylvania |
| 14 | Fern Wilson | 25 | Maid | Housekeeper | Kansas |
| 15 | Charles F. Cassidy | 56 | Head | President | Ohio |
| 16 | John F. Cassidy THIS PERSON | 27 | Son | Secretary | Colorado |
| 17 | Charles A. Cassidy | 25 | Son | — | Colorado |
| 18 | Charles G. Cassidy | 23 | Son | Air Pursuer | Colorado |
| 19 | Frank Kawabata | 60 | Servant | House Man | Japan |
| 20 | Leora L. Emrich | 55 | Head | — | Minnesota |
| 21 | Myron B. Emrich | 24 | Son | Treasurer | Colorado |
| 22 | Rose L. Emrich | 24 | Daughter | — | Missouri |
| 23 | Flora Martin | 68 | Maid | House Keeper | Iowa |
| 24 | Louis Sherman | 73 | Head | — | Russia |
| 25 | Annie Sherman | 66 | Wife | — | New York |
| 26 | Abraham Tannenbaum | 48 | Son-in-law | Loans | Colorado |
| 27 | Edith Tannenbaum | 46 | Daughter | — | New York |
| 28 | Philip Tannenbaum | 20 | Grandson | — | Colorado |
| 29 | Robert M. Schmitt | 42 | Head | Salesman | Colorado |
| 30 | Mary Edith Schmitt | 40 | Wife | — | Colorado |
| 31 | Marianne Schmitt | 15 | Daughter | — | Colorado |
| 32 | Pauline Schmitt | 9 | Daughter | — | Colorado |
| 33 | Hazlett C. Binns | 58 | Head | Merchant | Kansas |
| 34 | May E. Binns | 55 | Wife | — | Illinois |
| 35 | Binns | None | — | — | — |
| 36 | Sidney Brauer | 46 | Head | Buyer | Colorado |
| 37 | Lillian Brauer | 40 | Wife | — | Colorado |
| 38 | Virginia Brauer | 17 | Daughter | — | Colorado |
| 39 | Leona Bustle | 42 | Head | Office Manager | Missouri |
| 40 | Robert Bustle | 18 | Son | — | Kansas |
Pedigree Summary
John + 2 siblings
Gen 1 · 2 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)