WC
William Cochran — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Dekalb-County, Illinois
Our Model Tree links this William Cochran across the 1930 and 1940 US Censuses in Dekalb-County, Illinois (XGBoost, ~Confirmed) — first a son (b.~1925), then head of a 11-person household.
Age 15
b. ~1925
Male
Son
Born: Indiana
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Dekalb-County, Illinois |
| Surname | Cochran |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Indiana |
| 1935 Residence (City) | De Kalb |
| 1935 Residence (County) | De Kalb |
| Additional Details | |
| Industry | 208 |
| Highest Grade | H-1 |
| 1935 Residence | Illinois |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
| Township / Ward | De Kalb City |
| 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 William | Age | Birth yr |
|---|---|---|---|---|
| Esther Cochran | Daughter | — | 3 | ~1937 |
| Mary Cochran | Daughter | — | 7 | ~1933 |
| Betty Cochran | Daughter | — | 13 | ~1927 |
| Alma Cochran | Daughter | — | 19 | ~1921 |
| Viola Cochran | Daughter | — | 18 | ~1922 |
| Emery Cochran | Head | — | 42 | ~1898 |
| Paul Cochran | Son | — | 11 | ~1929 |
| William Cochran | Son | — | 15 | ~1925 |
| James Cochran | Son | — | 1 | ~1939 |
| Roger Cochran | Son | — | 5 | ~1935 |
| Alice Cochran | Spouse | — | 39 | ~1901 |
Census Appearances
1930
Dekalb, Illinois
Son, age 5
Dekalb, Illinois · implied b. ~1925 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cochrane |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | Indiana |
| Father's Birthplace | Indiana |
| Mother's Birthplace | Indiana |
| Can Read/Write | No |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
1940
Dekalb-County, Illinois
Son, age 15
Dekalb-County, Illinois · implied b. ~1925 — 11 household members
| Surname | Cochran |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Indiana |
| 1935 Residence (City) | De Kalb |
| 1935 Residence (County) | De Kalb |
| Industry | 208 |
| Highest Grade | H-1 |
| 1935 Residence | Illinois |
| 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 William Cochran across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
William Cochran
Son · 1940 · age 15 · b. ~1925 · Illinois
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Sibling
Paul Cochran
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Cochran
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Esther Cochran
Sibling · 1940 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Betty Cochran
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Viola Cochran
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Alma Cochran
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Roger Cochran
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Cochran
Sibling · 1940 · 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
1940 US Federal Census — Dekalb-County, Illinois
Open full size
1940 US Federal Census — Dekalb-County, Illinois
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-00793-00304)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Maurice Jensen | 6 | Lodger | — | Illinois |
| 2 | Emery Cochran | 42 | Head | Building Wrecker | Indiana |
| 3 | Alice Cochran | 39 | Wife | — | Indiana |
| 4 | Alma Cochran | 19 | Daughter | Packer | Indiana |
| 5 | Viola Cochran | 18 | Daughter | Weaver | Indiana |
| 6 | William Cochran THIS PERSON | 15 | Son | — | Indiana |
| 7 | Betty J. Cochran | 13 | Daughter | — | Indiana |
| 8 | Paul Cochran | 11 | Son | — | Illinois |
| 9 | Mary Cochran | 7 | Daughter | — | Illinois |
| 10 | Roger Cochran | 5 | Son | — | Illinois |
| 11 | Esther Cochran | 3 | Daughter | — | Illinois |
| 12 | James Cochran | 1 | Son | — | Illinois |
| 13 | Geoffrey Baker | 47 | Head | Road Laborer | Minnesota |
| 14 | Alma Baker | 44 | Wife | — | Illinois |
| 15 | Marilyn Baker | 20 | Daughter | — | Michigan |
| 16 | Avil Baker | 18 | Daughter | — | Michigan |
| 17 | Geoffrey Baker | 17 | Son | Pin Setter | Michigan |
| 18 | Betty Baker | 15 | Daughter | — | Michigan |
| 19 | Jack Baker | 9 | Son | — | Illinois |
| 20 | Donald Baker | 9 | Son | — | Illinois |
| 21 | Sharon Baker | 3 | Daughter | — | Illinois |
| 23 | Arthur William | 35 | Head | Machinist | Kansas |
| 24 | Esther William | 34 | Wife | Assembler | Kentucky |
| 25 | Clyde William | 12 | Son | — | Kentucky |
| 26 | Harry William | 10 | Son | — | Ohio |
| 27 | Harold Connite | 17 | Cousin | Press Washer | Ohio |
| 28 | John E. Allison | 73 | Father | — | Kentucky |
| 29 | Anthony Nicolini | 42 | Head | Galvanizer | Italy |
| 30 | Violet Nicolini | 21 | Daughter | Clerical Work | Illinois |
| 31 | Lou Prentice | 54 | Head | Gardener | Illinois |
| 32 | Tony Prentice | 18 | Son | Messenger | Illinois |
| 33 | John Prentice | 17 | Son | — | Illinois |
| 34 | Jack Burkhardt | 25 | Head | General Laborer | Illinois |
| 35 | Margaret Burkhardt | 21 | Daughter | Housework | Illinois |
| 36 | Paul Anderson | 49 | Head | Carpenter | Illinois |
| 37 | Jennie Anderson | 43 | Wife | — | Illinois |
| 38 | Jane Alice Anderson | 17 | Daughter | Stenographer | Illinois |
| 39 | Percy Hannon | 48 | Head | Office Manager | Illinois |
| 40 | Eugenia Hannon | 46 | Wife | — | 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)