JC
John Cochran — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Marion-County, Indiana
Our Model Tree links this John Cochran across the 1920, 1930 and 1940 US Censuses in Marion-County, Indiana (XGBoost, ~Confirmed) — first a head (b.~1868), then head of a 8-person household.
Age 72
b. ~1868
Male
Head
Born: Indiana
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Marion-County, Indiana |
| Surname | Cochran |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 72 |
| Marital Status | Married |
| Birthplace | Indiana |
| 1935 Residence (City) | Indianapolis |
| 1935 Residence (County) | Marion |
| Additional Details | |
| Class of Worker | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same Place |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
| Township / Ward | Indianapolis |
| Est. Birth Year | ~1868 |
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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Gertrude Cochran | Daughter | — | 21 | ~1919 |
| Agnes Cochran | Daughter | — | 20 | ~1920 |
| Rosemary Cochran | Daughter | — | 25 | ~1915 |
| Winifred Cochran | Daughter | — | 23 | ~1917 |
| John Cochran | Head | — | 72 | ~1868 |
| Leo Cochran | Son | — | 27 | ~1913 |
| Lewis Cochran | Son | — | 39 | ~1901 |
| Anna Cochran | Spouse | — | 62 | ~1878 |
Census Appearances
1920
Marion, Indiana
Head, age 52
Marion, Indiana · implied b. ~1868 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cochran |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 52 |
| Marital Status | Married |
| Birthplace | Indiana |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Indiana |
| Occupation | Danner Finisher |
| Industry | Auto Co. |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Home Owned/Rented | O |
| Home Free/Mortgaged | F |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
1930
Marion, Indiana
Head, age 62
Marion, Indiana · implied b. ~1868 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cochran |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 62 |
| Marital Status | Married |
| Birthplace | Indiana |
| Age at First Marriage | 29 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | New York |
| Occupation | Laborer |
| Industry | Furniture co |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Home Value / Rent | $2,500 |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
1940
Marion-County, Indiana
Head, age 72
Marion-County, Indiana · implied b. ~1868 — 8 household members
| Surname | Cochran |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 72 |
| Marital Status | Married |
| Birthplace | Indiana |
| 1935 Residence (City) | Indianapolis |
| 1935 Residence (County) | Marion |
| Class of Worker | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same Place |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
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 Cochran 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 Cochran
Head · 1940 · age 72 · b. ~1868 · Indiana
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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 — Marion-County, Indiana
Open full size
1940 US Federal Census — Marion-County, Indiana
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01128-00005)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Ann Wehlage | 65 | Head | — | Kentucky |
| 2 | Paul Mcilvain | 38 | Son-in-law | Laborer | Indiana |
| 3 | Marie Mcilvain | 37 | Daughter | Bookkeeper | Indiana |
| 4 | Mary Joan Mcilvain | 6 | Daughter | — | Indiana |
| 5 | Berty Jean Mcilvain | 1 | Daughter | — | Indiana |
| 6 | Charles Spandau | 39 | Head | Plumber | Indiana |
| 7 | Frances Spandau | 42 | Wife | Stenographer | Indiana |
| 8 | Mary Lipp | 81 | Mother | — | Ohio |
| 9 | Robert Arnold | 29 | Head | Storekeeper | Indiana |
| 10 | Irene Arnold | 39 | Wife | — | Indiana |
| 11 | Joan Arnold | 14 | Daughter | — | Indiana |
| 12 | Norman C. Arnold | 11 | Son | — | Indiana |
| 13 | David Rathfon | 69 | Head | Printer | Indiana |
| 14 | Mary Etta Rathfon | 67 | Wife | — | Indiana |
| 15 | Estelle Mastin | 39 | Daughter | — | Indiana |
| 16 | David Jr. Rathfon | 32 | Son | — | Indiana |
| 17 | Elizabeth Grube | 15 | Boarder | — | Kentucky |
| 18 | Mae Reece | 56 | Lodger | — | Indiana |
| 19 | Frank J. Beecher | 60 | Head | — | Indiana |
| 20 | Olga H. Beecher | 56 | Wife | — | Indiana |
| 21 | Franklin J. Beecher | 21 | Son | Bookkeeper | Indiana |
| 22 | Clotilda Buttner | 61 | Sister | — | Indiana |
| 23 | John Cochran THIS PERSON | 72 | Head | — | Indiana |
| 24 | Anna Cochran | 62 | Wife | — | Indiana |
| 25 | Lewis Cochran | 39 | Son | Clerical | Indiana |
| 26 | Leo Cochran | 27 | Son | — | Indiana |
| 27 | Rosemary Cochran | 25 | Daughter | Stenographer | Indiana |
| 28 | Winifred Cochran | 23 | Daughter | Stenographer | Indiana |
| 29 | Gertrude Cochran | 21 | Daughter | Stenographer | Indiana |
| 30 | Agnes Cochran | 20 | Daughter | Cashier | Indiana |
| 31 | Otto F. Reifers | 37 | Head | Inspector | Indiana |
| 32 | Edna A. Reifers | 37 | Wife | — | Indiana |
| 33 | Otto F. Jr. Reifers | 14 | Son | — | Indiana |
| 34 | Edward Reifers | 13 | Son | — | Indiana |
| 35 | Robert Reifers | 10 | Son | — | Indiana |
| 36 | Anna Haboney | 63 | Mother-in-law | — | Indiana |
| 37 | Quentin Willey | 37 | Head | Glass Cutter | Indiana |
| 38 | Margaret Willey | 34 | Wife | — | Indiana |
| 39 | Fern Willey | 17 | Daughter | — | Indiana |
| 40 | Raymond Willey | 14 | Son | — | Indiana |
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)