JC
John Cassidy — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Livingston-County, Illinois
Our Model Tree links this John Cassidy across the 1920, 1930 and 1940 US Censuses in Livingston-County, Illinois (XGBoost, ~Confirmed) — first a head (b.~1869), then head of a 3-person household.
Age 71
b. ~1869
Male
Head
Born: Illinois
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Livingston-County, Illinois |
| Surname | Cassidy |
| Given Name | John D. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 71 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Broughton Township |
| 1935 Residence (County) | Livingston |
| Additional Details | |
| Highest Grade | 8 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Broughton Township |
| Est. Birth Year | ~1869 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| John Cassidy | Head | — | 71 | ~1869 |
| Francis Cassidy | Son | — | 40 | ~1900 |
| Nellie Cassidy | Spouse | — | 65 | ~1875 |
Census Appearances
1920
Livingston, Illinois
Head, age 52
Livingston, Illinois · implied b. ~1868 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cassidy |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 52 |
| Marital Status | Married |
| Birthplace | Illinois |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | OA |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Irish |
| Home Owned/Rented | O |
| Home Free/Mortgaged | F |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Livingston, Illinois
Head, age 61
Livingston, Illinois · implied b. ~1869 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cassidy |
| Given Name | John A |
| Relationship to Head | head |
| Sex | M |
| Color / Race | White |
| Age | 61 |
| Marital Status | Married |
| Birthplace | Illinois |
| Age at First Marriage | 30 |
| Father's Birthplace | Ireland Free State |
| Mother's Birthplace | Ireland Free State |
| Occupation | farmer |
| Industry | gen. farm |
| Class of Worker | O |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Livingston-County, Illinois
Head, age 71
Livingston-County, Illinois · implied b. ~1869 — 3 household members
| Surname | Cassidy |
| Given Name | John D. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 71 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Broughton Township |
| 1935 Residence (County) | Livingston |
| Highest Grade | 8 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
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.
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This person
Anchor record
John Cassidy
Head · 1940 · age 71 · b. ~1869 · Illinois
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Livingston-County, Illinois
Open full size
1940 US Federal Census — Livingston-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00837-00089)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Lucille Roche | 14 | Daughter | — | Illinois |
| 42 | Louis A. Holm | 37 | Head | Farmer | Illinois |
| 43 | Elsie Holm | 34 | Wife | — | Illinois |
| 44 | Louis Jr. Holm | 9 | Son | — | Illinois |
| 45 | Helen Holm | 5 | Daughter | — | Illinois |
| 46 | Clarence Thorson | 34 | Head | Farmer | Illinois |
| 47 | Sarah Thorson | 61 | Mother | — | Illinois |
| 48 | Lillie Thorson | 38 | Daughter | — | Illinois |
| 49 | Arndt Thorson | 32 | Son | Farm Laborer | Illinois |
| 50 | Martin Thorson | 25 | Son | Farm Laborer | Illinois |
| 51 | George Williams | 11 | Nephew | — | Illinois |
| 52 | Margaret Mulligan | 35 | Head | — | Illinois |
| 53 | Johanna Cahill | 74 | Mother | — | Illinois |
| 54 | John D. Fomeris | 59 | Head | Farmer | Italy |
| 55 | Victoria Fomeris | 45 | Wife | — | Italy |
| 56 | Lucille Fomeris | 16 | Daughter | — | Illinois |
| 57 | Clinton B. Wagner | 28 | Head | Farmer | Illinois |
| 58 | Ada Wagner | 32 | Wife | — | Illinois |
| 59 | Arthur Christiansen | 37 | Head | Farmer | Illinois |
| 60 | Beatrice Christiansen | 36 | Wife | — | Illinois |
| 61 | Donald Son Christiansen | 8 | Son | — | Illinois |
| 62 | Ronald Son Christiansen | 1 | Son | — | Illinois |
| 63 | John D. Cassidy THIS PERSON | 71 | Head | — | Illinois |
| 64 | Nellie Cassidy | 65 | Wife | — | Illinois |
| 65 | Francis Cassidy | 40 | Son | P.W.A. Worker | Illinois |
| 66 | Leslie D. Nelson | 24 | Head | Farmer | Illinois |
| 67 | Dorothy Nelson | 21 | Wife | — | Illinois |
| 68 | Casper Nelson | 59 | Head | Farmer | Illinois |
| 69 | Greta Nelson | 57 | Wife | — | Illinois |
| 70 | Arville Nelson | 24 | Son | Farm Laborer | Illinois |
| 71 | Irving Nelson | 21 | Son | Farm Laborer | Illinois |
| 72 | Evelyn Nelson | 18 | Daughter | — | Illinois |
| 73 | James D. Ralph | 51 | Head | Farmer | Illinois |
| 74 | Irene Ralph | 43 | Wife | — | Illinois |
| 75 | Maude Mary Ralph | 6 | Daughter | — | Illinois |
| 76 | Joseph D. Foley | 50 | Head | Farmer | Illinois |
| 77 | Agnes Foley | 52 | Wife | — | Illinois |
| 78 | Rita Foley | 23 | Daughter | Census Enumerator | Illinois |
| 79 | Leona Foley | 20 | Daughter | — | Illinois |
| 80 | Edmund Foley | 19 | Son | Farm Laborer | Illinois |
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)