JC
John Cassidy — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Mackinac-County, Michigan
Our Model Tree links this John Cassidy across the 1930 and 1940 US Censuses in Mackinac-County, Michigan (XGBoost, ~Confirmed) — first a son (b.~1925), then head of a 11-person household.
Age 15
b. ~1925
Male
Son
Born: Michigan
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Mackinac-County, Michigan |
| Surname | Cassidy |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Michigan |
| 1935 Residence (City) | Newton Twp |
| 1935 Residence (County) | Mackinac |
| Additional Details | |
| Industry | S |
| Class of Worker | 0 |
| Highest Grade | 8 |
| 1935 Residence | Same place |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
| Township / Ward | Newton Twp |
| Est. Birth Year | ~1925 |
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.
11 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Patricia Cassidy | Daughter | — | 3 | ~1937 |
| Elizabeth Cassidy | Daughter | — | 12 | ~1928 |
| Ruth Cassidy | Daughter | — | 8 | ~1932 |
| Helen Cassidy | Daughter | — | 14 | ~1926 |
| Catherine Cassidy | Daughter | — | 18 | ~1922 |
| Roseann Cassidy | Daughter | — | 11 | ~1929 |
| Michael Cassidy | Head | — | 54 | ~1886 |
| Frederick Cassidy | Son | — | 22 | ~1918 |
| John Cassidy | Son | — | 15 | ~1925 |
| Joseph Cassidy | Son | — | 4 | ~1936 |
| Mary Cassidy | Spouse | — | 46 | ~1894 |
Census Appearances
1930
Mackinac, Michigan
Son, age 5
Mackinac, Michigan · implied b. ~1925 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cassidy |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | Michigan |
| Father's Birthplace | Michigan |
| Mother's Birthplace | Michigan |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
1940
Mackinac-County, Michigan
Son, age 15
Mackinac-County, Michigan · implied b. ~1925 — 11 household members
| Surname | Cassidy |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Michigan |
| 1935 Residence (City) | Newton Twp |
| 1935 Residence (County) | Mackinac |
| Industry | S |
| Class of Worker | 0 |
| Highest Grade | 8 |
| 1935 Residence | Same place |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
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 15 · b. ~1925 · Michigan
★ You are viewing this record
Sibling
Helen Cassidy
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Catherine Cassidy
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Roseann Cassidy
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Elizabeth Cassidy
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Patricia Cassidy
Sibling · 1940 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joseph Cassidy
Sibling · 1940 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Frederick Cassidy
Sibling · 1940 · age 22
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ruth Cassidy
Sibling · 1940 · age 8
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 — Mackinac-County, Michigan
Open full size
1940 US Federal Census — Mackinac-County, Michigan
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01781-00388)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Alberta Gould | 16 | Daughter | — | Michigan |
| 42 | Lorraine Gould | 12 | Daughter | — | Michigan |
| 43 | Mary A Hewett | 60 | Head | Manager | Canada |
| 44 | Michael Fox | 68 | Lodger | — | Canada |
| 45 | Verne Faulman | 47 | Head | Moulder | Michigan |
| 46 | Ruth Faulman | 46 | Wife | — | Michigan |
| 47 | Elmer Blanchard | 56 | Head | Farmer | Michigan |
| 48 | Anna Blanchard | 45 | Wife | Teacher | Michigan |
| 49 | Ernel Blanchard | 24 | Son | Laborer | Michigan |
| 50 | Russell Aslin | 32 | Lodger | Laborer | Michigan |
| 51 | Ralph Fisher | 10 | Lodger | — | Michigan |
| 52 | Elizabeth Mccallum | 63 | Head | Farming | Canada |
| 53 | Jean Mccallum | 15 | Daughter | — | Michigan |
| 54 | James Mccallum | 29 | Son | Mechanic | Michigan |
| 55 | Idamae Mccallum | 20 | Daughter-in-law | — | Michigan |
| 56 | Harry Mccallum | 3 | Grandson | — | Michigan |
| 57 | Mary Mccallum | 2 | Granddaughter | — | Michigan |
| 58 | George Hewett | 53 | Head | Farmer | Michigan |
| 59 | Lambert Hewett | 55 | Brother | Farmer | Michigan |
| 60 | Zelma Hewett | 19 | Niece | — | Michigan |
| 61 | Charles Mcneil | 74 | Head | — | New York |
| 62 | Charles Jr Mcneil | 32 | Son | Laborer | Michigan |
| 63 | Michael Cassidy | 54 | Head | Laborer | Michigan |
| 64 | Mary Cassidy | 46 | Wife | — | Michigan |
| 65 | Frederick Cassidy | 22 | Son | Laborer | Michigan |
| 66 | Catherine Cassidy | 18 | Daughter | — | Michigan |
| 67 | John Cassidy THIS PERSON | 15 | Son | — | Michigan |
| 68 | Helen Cassidy | 14 | Daughter | — | Michigan |
| 69 | Elizabeth Cassidy | 12 | Daughter | — | Michigan |
| 70 | Roseann Cassidy | 11 | Daughter | — | Michigan |
| 71 | Ruth Cassidy | 8 | Daughter | — | Michigan |
| 72 | Joseph Cassidy | 4 | Son | — | Michigan |
| 73 | Patricia Cassidy | 3 | Daughter | — | Michigan |
| 74 | Theodore Lapine | 68 | Head | — | Michigan |
| 75 | Frank Lapine | 66 | Head | Farming | Michigan |
| 76 | Vern Lapine | 28 | Son | Truck Driver | Michigan |
| 77 | Minnie Lapine | 31 | Daughter-in-law | — | Wisconsin |
| 78 | James Lapine | 2 | Grandson | — | Michigan |
| 79 | August Becker | 67 | Head | Carpenter | Germany |
| 80 | Clarence Gunders | 42 | Lodger | Laborer | Wisconsin |
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)