JC
John Cochran — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this John Cochran across the 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a son (b.~1929), then head of a 9-person household.
Age 11
b. ~1929
Male
Son
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Cochran |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Highest Grade | G-5 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Chicago |
| Est. Birth Year | ~1929 |
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.
9 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Regina Cochran | Daughter | — | 9 | ~1931 |
| Sarah Cochran | Daughter | — | 13 | ~1927 |
| Erminia Cochran | Daughter | — | 17 | ~1923 |
| Mary Cochran | Daughter | — | 15 | ~1925 |
| Andrew Cochran | Head | — | 62 | ~1878 |
| Andrew Cochran | Son | — | 18 | ~1922 |
| John Cochran | Son | — | 11 | ~1929 |
| Thomas Cochran | Son | — | 14 | ~1926 |
| Armina Cochran | Spouse | — | 39 | ~1901 |
Census Appearances
1930
Cook, Illinois
Son, age
Cook, Illinois · implied b. ~1930 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cochrane |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 0 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Germany |
| 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 — 9 household members
| Surname | Cochran |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Highest Grade | G-5 |
| 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 · 1940 · age 11 · b. ~1929 · Illinois
★ You are viewing this record
Sibling
Sarah Cochran
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Cochran
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas Cochran
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Regina Cochran
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Andrew Cochran
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Erminia Cochran
Sibling · 1940 · age 17
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 — Cook-County, Illinois
Open full size
1940 US Federal Census — Cook-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00979-00058)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | William H. Watt | 25 | Nephew | Stock Clerk | Tennessee |
| 42 | James N. Watt | 22 | Nephew | Head Pipe Loader | Tennessee |
| 43 | Leslie Hallow | 21 | Boarder | Head Pipe Loader | Michigan |
| 44 | Walter Baker | 38 | Head | Truck Driver | Illinois |
| 45 | Irene Baker | 34 | Wife | — | Pennsylvania |
| 46 | Rose M. Baker | 11 | Daughter | — | Illinois |
| 47 | Robert Baker | 10 | Son | — | Illinois |
| 48 | Sabato Pinto | 57 | Head | News Boy | Italy |
| 49 | Catherine Pinto | 54 | Wife | — | Italy |
| 50 | Samuel Pinto | 24 | Son | Laborer | Illinois |
| 51 | Frank Pinto | 23 | Son | Helper On Truck | Illinois |
| 52 | Christina Pinto | 18 | Daughter | New Worker | Illinois |
| 53 | Rose Pinto | 16 | Daughter | — | Illinois |
| 54 | Caroline Pinto | 12 | Daughter | — | Illinois |
| 55 | Paul Naramore | 44 | Head | Owner | Illinois |
| 56 | Helen Naramore | 49 | Wife | — | Illinois |
| 57 | Neil Naramore | 21 | Son | Truck Driver | Illinois |
| 58 | Herman Klief | 77 | Head | — | Germany |
| 59 | Dennis Maloney | 59 | Head | Laborer | Illinois |
| 60 | Don Maloney | 20 | Son | Attendant | Illinois |
| 61 | Rose M. Maloney | 17 | Daughter | — | Illinois |
| 62 | Betty Maloney | 14 | Daughter | — | Illinois |
| 63 | Andrew Cochran | 62 | Head | Steam Fitting | Pennsylvania |
| 64 | Armina Cochran | 39 | Wife | — | Illinois |
| 65 | Andrew Jr. Cochran | 18 | Son | Errand Boy | Louisiana |
| 66 | Erminia Cochran | 17 | Daughter | — | Louisiana |
| 67 | Mary Cochran | 15 | Daughter | — | Louisiana |
| 68 | Thomas Cochran | 14 | Son | — | Illinois |
| 69 | Sarah Cochran | 13 | Daughter | — | Illinois |
| 70 | John Cochran THIS PERSON | 11 | Son | — | Illinois |
| 71 | Regina Cochran | 9 | Daughter | — | Illinois |
| 72 | Ralph Mantone | 55 | Head | Pastor | Italy |
| 73 | Margaret R. Mantone | 47 | Wife | — | Pennsylvania |
| 74 | Minnie Rein | 43 | Head | — | Indiana |
| 75 | Affie Childress | 35 | Son-in-law | Lineman Electrical | Illinois |
| 76 | Dorothy Childress | 20 | Daughter | Telephone Operator | Illinois |
| 77 | William F. Rein | 23 | Nephew | Auto Mechanic | New York |
| 78 | June Rein | 20 | Niece-in-law | — | Nebraska |
| 79 | Willard F. Roberts | 29 | Head | Clerk | Missouri |
| 80 | Alta S. Roberts | 29 | Wife | Clerk Dept. Store | Missouri |
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)