JC
James Cochran — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Montgomery-County, Ohio
Our Model Tree links this James Cochran across the 1930 and 1940 US Censuses in Montgomery-County, Ohio (XGBoost, ~Confirmed) — first a son (b.~1925), then head of a 7-person household.
Age 15
b. ~1925
Male
Son
Born: Ohio
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Montgomery-County, Ohio |
| Surname | Cochran |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Ohio |
| 1935 Residence (City) | Dayton City |
| 1935 Residence (County) | Montgomery |
| Additional Details | |
| Highest Grade | H 1 |
| 1935 Residence | Same place |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
| Township / Ward | Dayton 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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to James | Age | Birth yr |
|---|---|---|---|---|
| Mary Cochran | Spouse | — | 45 | ~1895 |
| James Cochran | Son | — | 15 | ~1925 |
| John Cochran | Son | — | 8 | ~1932 |
| Donald Cochran | Son | — | 10 | ~1930 |
| Harry Cochran | Head | — | 46 | ~1894 |
| Richard Cochran | Son | — | 17 | ~1923 |
| Martha Cochran | Daughter | — | 19 | ~1921 |
Census Appearances
1930
Montgomery, Ohio
Son, age 5
Montgomery, Ohio · implied b. ~1925 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cochran |
| Given Name | James D. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | Ohio |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Ohio |
| Can Read/Write | Yes |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
1940
Montgomery-County, Ohio
Son, age 15
Montgomery-County, Ohio · implied b. ~1925 — 7 household members
| Surname | Cochran |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Ohio |
| 1935 Residence (City) | Dayton City |
| 1935 Residence (County) | Montgomery |
| Highest Grade | H 1 |
| 1935 Residence | Same place |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
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 James Cochran across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
James Cochran
Son · 1940 · age 15 · b. ~1925 · Ohio
★ You are viewing this record
Sibling
Martha Cochran
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Donald Cochran
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Cochran
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Richard 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 — Montgomery-County, Ohio
Open full size
1940 US Federal Census — Montgomery-County, Ohio
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03255-01014)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | M. Florence Scofield | 28 | Foster Son | Draftsman | Ohio |
| 2 | Jerome Simpson | 23 | Lodger | Pressman | Ohio |
| 3 | John W. Luby | 56 | Head | Die Maker | Ohio |
| 4 | Jessie L. Luby | 55 | Wife | — | Ohio |
| 5 | Phyllis E. Luby | 19 | Daughter | — | Ohio |
| 6 | Harry Cochran | 46 | Head | Safety | Ohio |
| 7 | Mary E. Cochran | 45 | Wife | Sales Engineer | Ohio |
| 8 | Martha J. Cochran | 19 | Daughter | Clerk | Ohio |
| 9 | Richard J. Cochran | 17 | Son | — | Ohio |
| 10 | James Cochran THIS PERSON | 15 | Son | — | Ohio |
| 11 | Donald P. Cochran | 10 | Son | — | Ohio |
| 12 | John L. Cochran | 8 | Son | — | Ohio |
| 13 | Walter S. Critchfield | 65 | Head | Owner | Ohio |
| 14 | Alice S. Critchfield | 62 | Wife | Owner | Ohio |
| 15 | A. Harold Lawrence | 38 | Head | Jig Borer | Ohio |
| 16 | Alice Lawrence | 31 | Wife | Switch Board Operator | Ohio |
| 17 | Barbara Lawrence | 5 | Daughter | — | Ohio |
| 18 | Elizabeth Lawrence | 56 | Mother | Engr Mach Opr | Ohio |
| 19 | Elsie E. Lawrence | 51 | Aunt | — | Texas |
| 20 | Fred W. Leen | 58 | Head | Foreman | Ohio |
| 21 | Rose F. Leen | 54 | Wife | — | Virginia |
| 22 | Robert J. Leen | 25 | Son | Accountant | Indiana |
| 23 | Richard J. Leen | 21 | Son | — | Ohio |
| 24 | Earl E. Hussey | 58 | Head | Auto Mechanic | Ohio |
| 25 | Elizabeth E. Hussey | 48 | Wife | — | Ohio |
| 26 | Elizabeth M. Hussey | 20 | Daughter | — | Ohio |
| 27 | Robert J. Leen | 49 | Head | Purchasing Agt | Ohio |
| 28 | Olivia D. Leen | 46 | Wife | — | Ohio |
| 29 | Robert J. Jr. Leen | 22 | Son | Tool Maker | Ohio |
| 30 | Thomas E. Leen | 20 | Son | Tool Maker | Ohio |
| 31 | Rosemarie Leen | 18 | Daughter | — | Ohio |
| 32 | Ralph H. Leen | 14 | Son | — | Ohio |
| 33 | Angella A. Leen | 12 | Daughter | — | Ohio |
| 34 | John Edw. Leen | 10 | Son | — | Ohio |
| 35 | Geo. W. Snyder | 48 | Head | Organizer | Ohio |
| 36 | Mildred Snyder | 37 | Wife | Clerk & Bookkeeper | Ohio |
| 37 | Ralph J. Flater | 46 | Head | Plumber | Ohio |
| 38 | Ruth Flater | 43 | Wife | — | Ohio |
| 39 | Rita E. Flater | 22 | Daughter | Stenographer | Ohio |
| 40 | Juanita M. Flater | 19 | Daughter | Saleslady | Ohio |
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)