RC
Robert Cochran — 1940 US Census Record
Model Tree available1940 United States Federal Census · Marion-County, Indiana
Our Model Tree links this Robert Cochran across the 1920, 1930 and 1940 US Censuses in Marion-County, Indiana (XGBoost, ~Confirmed), with identified parents Lucian & Stacy — first a son (b.~1920), then head of a 4-person household.
Age 20
b. ~1920
Male
Son
Born: Indiana
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Marion-County, Indiana |
| Surname | Cochran |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Indiana |
| 1935 Residence (City) | Indianapolis |
| 1935 Residence (County) | Marion |
| Additional Details | |
| Occupation | Office manager |
| Industry | Mfg. Co. |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 416 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
| Occupation | Office Manager |
| Township / Ward | Indianapolis |
| Est. Birth Year | ~1920 |
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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Robert | Age | Birth yr |
|---|---|---|---|---|
| Daisy Cochran | Head | — | 44 | ~1896 |
| Earl Cochran | Son | — | 17 | ~1923 |
| Don Cochran | Son | — | 10 | ~1930 |
| Robert Cochran | Son | — | 20 | ~1920 |
Census Appearances
1920
Marion, Indiana
Son, age
Marion, Indiana · implied b. ~1920 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cochran |
| Given Name | Robert S |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 0 |
| Marital Status | Single |
| Birthplace | Indiana |
| Father's Birthplace | Indiana |
| Mother's Birthplace | Indiana |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
1930
Marion, Indiana
Son, age 10
Marion, Indiana · implied b. ~1920 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cochran |
| Given Name | Robert G. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Indiana |
| Father's Birthplace | Indiana |
| Mother's Birthplace | Indiana |
| Can Read/Write | Yes |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
1940
Marion-County, Indiana
Son, age 20
Marion-County, Indiana · implied b. ~1920 — 4 household members
| Surname | Cochran |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Indiana |
| 1935 Residence (City) | Indianapolis |
| 1935 Residence (County) | Marion |
| Occupation | Office manager |
| Industry | Mfg. Co. |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 416 |
| Highest Grade | H 4 |
| 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 Robert Cochran across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Lucian Cochran (~0.92 confidence) and father Stacy Cochran (~0.92 confidence) and mother Daisy Cochran (~0.92 confidence) and mother Daisy Cochran (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Lucian Cochran
b. ~1885
Source father
● Household
· direct · ~0.92
Father
Stacy Cochran
b. ~1896
Source father
● Household
· direct · ~0.92
Mother
Daisy Cochran
b. ~1896
Source mother
● Household
· direct · ~0.92
Mother
Daisy Cochran
b. ~1897
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Robert Cochran
Son · 1940 · age 20 · b. ~1920 · Indiana
★ You are viewing this record
Sibling
Earl Cochran
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Don Cochran
Sibling · 1940 · age 10
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 — 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-t0627-01131-00939)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | George Lowe | 60 | Head | Policeman | Kentucky |
| 2 | Mildred Lowe | 44 | Wife | — | Ohio |
| 3 | Marguetta Taylor | 50 | Head | — | Indiana |
| 4 | Daisy Cochran | 44 | Head | Advertising Manager | Indiana |
| 5 | Robert Cochran THIS PERSON | 20 | Son | Office Manager | Indiana |
| 6 | Earl Cochran | 17 | Son | — | Indiana |
| 7 | Don Cochran | 10 | Son | — | Indiana |
| 8 | William Niehaus | 56 | Head | Leverman | Indiana |
| 9 | Bertha Niehaus | 55 | Wife | — | Indiana |
| 10 | Donna Niehaus | 18 | Daughter | New Worker | Indiana |
| 11 | Harry Rukes | 36 | Head | Packer | Indiana |
| 12 | Ann Rukes | 27 | Wife | Tapper | Scotland |
| 13 | Barbara Sue Rukes | 4 | Daughter | — | Indiana |
| 14 | Eugene Sandefur | 52 | Head | Mixer | Kentucky |
| 15 | Daisy Sandefur | 49 | Wife | Carder | Kentucky |
| 16 | James Smith | 32 | Son-in-law | Metal Beader | Indiana |
| 17 | Eleanor Smith | 26 | Daughter | — | Indiana |
| 18 | Dolores Smith | 5 | Daughter | — | Indiana |
| 19 | Judith A. Smith | 2 | Daughter | — | Indiana |
| 20 | James Jr. Smith | 3 | Son | — | Indiana |
| 21 | Clovis Livingston | 29 | Head | Grocery Clerk | Indiana |
| 22 | Irene Livingston | 27 | Wife | — | Indiana |
| 23 | Bonnie Jean Livingston | 6 | Daughter | — | Indiana |
| 24 | Richard L. Livingston | 1 | Son | — | Indiana |
| 25 | Block Leave | 13 | 11 | — | — |
| 26 | Harry Watters | 28 | Head | Machinist | Indiana |
| 27 | Mae Watters | 27 | Wife | — | Indiana |
| 28 | Ira Robins | 60 | Head | Carpenter | Alabama |
| 29 | Stella Robins | 48 | Wife | — | Kentucky |
| 30 | Howard L. Robins | 3 | Grandson | — | Indiana |
| 31 | Robert Jenkins | 25 | Head | Filing Clerk | Ohio |
| 32 | Catherine Jenkins | 23 | Wife | Comptometer Operator | Indiana |
| 33 | Frank Walters | 28 | Head | Stock Clerk | Indiana |
| 34 | Catherine Walters | 28 | Wife | Stenographer | Indiana |
| 35 | Alfred Walters | 51 | Head | Construction Foreman | Indiana |
| 36 | Nora Walters | 50 | Wife | — | Indiana |
| 37 | Alfred Jr. Walters | 9 | Son | — | Indiana |
| 38 | Block Leave | 14 | 13 | — | — |
| 39 | Roland Jenkins | 23 | Head | Maintenance Man | Indiana |
| 40 | Rosalind Jenkins | 22 | Wife | Radio Tube Mounter | Indiana |
Pedigree Summary
Robert + 2 siblings
Gen 1 · 4 parents
~0.92
Max depth 4 (1900–1950 window)
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)