JC
John Cochran — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Cook, Illinois
Our Model Tree links this John Cochran across the 1930 and 1940 US Censuses in Cook, Illinois (XGBoost, ~Confirmed) — first a son (b.~1928), then head of a 11-person household.
Age 2
b. ~1928
Male
Son
Born: Illinois
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Cook, Illinois |
| Surname | Cochran |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Additional Details | |
| Can Read/Write | No |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Chicago City |
| Est. Birth Year | ~1928 |
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 1930 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Kathleen Cochran | Daughter | — | 10 | ~1920 |
| Eleanor Cochran | Daughter | — | 8 | ~1922 |
| Alice Cochran | Daughter | — | 1 | ~1929 |
| Gertrude Cochran | Daughter | — | 6 | ~1924 |
| Yvonne Cochran | Daughter | — | 11 | ~1919 |
| Mary Cochran | Daughter | — | 3 | ~1927 |
| John Cochran | Head | — | 40 | ~1890 |
| Thomas Cochran | Son | — | 5 | ~1925 |
| John Cochran | Son | — | 9 | ~1921 |
| John Cochran | Son | — | 2 | ~1928 |
| Gertrude Cochran | Spouse | — | 36 | ~1894 |
Census Appearances
1930
Cook, Illinois
Son, age 2
Cook, Illinois · implied b. ~1928 — 11 household members
| Surname | Cochran |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Can Read/Write | No |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Son, age 11
Cook-County, Illinois · implied b. ~1929 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cochrane |
| Given Name | John |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Summit Village |
| 1935 Residence (County) | Cook |
| Highest Grade | 4 |
| 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 Cochran across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Cochran
Son · 1930 · age 2 · b. ~1928 · Illinois
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Sibling
Kathleen Cochran
Sibling · 1930 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Cochran
Sibling · 1930 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas Cochran
Sibling · 1930 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Gertrude Cochran
Sibling · 1930 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Cochran
Sibling · 1930 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Eleanor Cochran
Sibling · 1930 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Yvonne Cochran
Sibling · 1930 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Alice Cochran
Sibling · 1930 · age 1
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
1930 US Federal Census — Cook, Illinois
Open full size
1930 US Federal Census — Cook, Illinois
Page Contents
50 people indexed on this census page (ia:1930:illinoiscensus00reel460:0406)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Tom Donahue | 33 | Head | Laborer | Ireland |
| 52 | Harry Burkett | 26 | Roomer | Chauffeur | Illinois |
| 53 | John W. Cochran | 40 | Head | Operator | Illinois |
| 54 | Gertrude Cochran | 36 | Wife | — | Illinois |
| 55 | Yvonne Cochran | 11 | Daughter | — | Illinois |
| 56 | Kathleen Cochran | 10 | Daughter | — | Illinois |
| 57 | John Cochran | 9 | Son | — | Illinois |
| 58 | Eleanor Cochran | 8 | Daughter | — | Illinois |
| 59 | Gertrude Cochran | 6 | Daughter | — | Illinois |
| 60 | Thomas Cochran | 5 | Son | — | Illinois |
| 61 | Mary Grace Cochran | 3 | Daughter | — | Illinois |
| 62 | John Cochran THIS PERSON | 2 | Son | — | Illinois |
| 63 | Alice Cochran | 1 | Daughter | — | Illinois |
| 64 | John J. Mcnamara | 71 | Head | Cutter | Ireland |
| 65 | James V. Mcnamara | 35 | Son | Inspector | Illinois |
| 66 | Margaret Mcnamara | 65 | Wife | — | Ireland |
| 67 | Elizabeth Mcnamara | 21 | Daughter | Typist | Illinois |
| 68 | Anton Reu | 61 | Head | Janitor | Germany |
| 69 | Emma Reu | 55 | Wife | — | Germany |
| 70 | Erich Reu | 23 | Son | Bookkeeper | Germany |
| 71 | Mary S. Hermann | 61 | Head | — | Germany |
| 72 | Irma C. Hermann | 29 | Daughter | Teacher | Illinois |
| 73 | Margaret Hanson | 58 | Head | — | Canada |
| 74 | Lloyd Strunk | 20 | Roomer | Salesman | Illinois |
| 75 | Dorothy Strunk | 20 | Roomer | Manager | Iowa |
| 76 | Geraldine Strunk | 1 | Roomer | — | Illinois |
| 77 | Mary Mcnatt | 40 | Roomer | Clerk | Illinois |
| 78 | Cora Edmondson | 35 | Roomer | Salesman | Illinois |
| 79 | Cora Edmondson | 30 | Roomer | Cashier | Indiana |
| 80 | Leonard Buttons | 29 | Roomer | Mechanic | Illinois |
| 81 | Alice Buttons | 24 | Roomer | Saleslady | Wisconsin |
| 82 | Allen Preske | 66 | Head | Shoemaker | Illinois |
| 83 | Margaret Preske | 60 | Wife | — | Illinois |
| 84 | Allen Preske | 34 | Son | Salesman | Illinois |
| 85 | Lida Atkinson | 37 | Head | Operator | Kentucky |
| 86 | Gladys Atkinson | 30 | Wife | — | Indiana |
| 87 | Arthur Atkinson | 11 | Son | — | Illinois |
| 88 | Alice Atkinson | 10 | Daughter | — | Illinois |
| 89 | Caroline Cashman | 45 | Head | — | Illinois |
| 90 | Charles Smyth | 22 | Roomer | Salesman | Indiana |
| 91 | Clarence Bradshaw | 40 | Roomer | Mechanic | Illinois |
| 92 | Jeanette Nelson | 30 | Roomer | Cashier | Illinois |
| 93 | Frank A. Porter | 66 | Head | Laborer | Illinois |
| 94 | Mary E. Porter | 54 | Wife | — | Illinois |
| 95 | Ralph Cardinal | 46 | Roomer | Electrician | New Jersey |
| 96 | Gordon Fallon | 22 | Roomer | Salesman | Illinois |
| 97 | Howard Roche | 39 | Roomer | Plumber | Illinois |
| 98 | Mike Welsh | 34 | Roomer | Conductor | Illinois |
| 99 | Peter Greene | 26 | Roomer | Clerk | Iowa |
| 100 | Patricia Porter | 17 | Niece | — | Illinois |
Related Census Records
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1930 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)