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James Cobb — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Oakland-County, Michigan
Our Model Tree links this James Cobb across the 1930 and 1940 US Censuses in Oakland-County, Michigan (XGBoost, ~Confirmed) — first a son (b.~1927), then head of a 9-person household.
Age 13
b. ~1927
Male
Son
Born: Michigan
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Oakland-County, Michigan |
| Surname | Cobb |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Michigan |
| 1935 Residence (City) | Pontiac |
| 1935 Residence (County) | Oakland |
| Additional Details | |
| Class of Worker | 0 |
| Highest Grade | 7 |
| 1935 Residence | Same place |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
| Township / Ward | Pontiac |
| Est. Birth Year | ~1927 |
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 James | Age | Birth yr |
|---|---|---|---|---|
| Billy Bena | Other | — | 17 | ~1923 |
| Don Cobb | Son | — | 10 | ~1930 |
| James Cobb | Son | — | 13 | ~1927 |
| Ralph Cobb | Son | — | 16 | ~1924 |
| Jane Cobb | Daughter | — | 12 | ~1928 |
| Daniel Cobb | Son | — | 5 | ~1935 |
| L Cobb | Head | — | 43 | ~1897 |
| Edith Cobb | Spouse | — | 42 | ~1898 |
| Franklin Cobb | Son | — | 7 | ~1933 |
Census Appearances
1930
Oakland, Michigan
Son, age 3
Oakland, Michigan · implied b. ~1927 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cobb |
| Given Name | James S. |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | Michigan |
| Father's Birthplace | Michigan |
| Mother's Birthplace | Michigan |
| Occupation | none |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
1940
Oakland-County, Michigan
Son, age 13
Oakland-County, Michigan · implied b. ~1927 — 9 household members
| Surname | Cobb |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Michigan |
| 1935 Residence (City) | Pontiac |
| 1935 Residence (County) | Oakland |
| Class of Worker | 0 |
| Highest Grade | 7 |
| 1935 Residence | Same place |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
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 Cobb across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
James Cobb
Son · 1940 · age 13 · b. ~1927 · Michigan
★ You are viewing this record
Sibling
Daniel Cobb
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Jane Cobb
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Don Cobb
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ralph Cobb
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Franklin Cobb
Sibling · 1940 · age 7
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 — Oakland-County, Michigan
Open full size
1940 US Federal Census — Oakland-County, Michigan
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01801-00371)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Robert Franklin | 15 | Son | — | Michigan |
| 42 | Julia Bakley | 34 | Sister | Domestic Maid | Michigan |
| 43 | Robert Glenn | 22 | Head | Salesman | Michigan |
| 44 | L. J. Herrick | 62 | Head | Lumber, Wholesale | Michigan |
| 45 | Bertha Herrick | 57 | Wife | — | Canada |
| 46 | L. E. Cobb | 43 | Head | Physician & Surgeon | Michigan |
| 47 | Edith Cobb | 42 | Wife | — | Michigan |
| 48 | Ralph Cobb | 16 | Son | — | Michigan |
| 49 | James Cobb THIS PERSON | 13 | Son | — | Michigan |
| 50 | Jane Cobb | 12 | Daughter | — | Michigan |
| 51 | Don Cobb | 10 | Son | — | Michigan |
| 52 | Franklin Cobb | 7 | Son | — | Michigan |
| 53 | Daniel Cobb | 5 | Son | — | Michigan |
| 54 | Billy Bena | 17 | Maid | Maid | Michigan |
| 55 | Elmer Charles | 60 | Head | Osteopath | Ohio |
| 56 | Grace Charles | 62 | Wife | — | Michigan |
| 57 | Mary Harrington | 85 | Mother-in-law | — | Michigan |
| 58 | Fred Waterston | 45 | Head | Truck Driver | Michigan |
| 59 | May Waterston | 54 | Wife | — | Michigan |
| 60 | Oliver J. Beaudette | 76 | Head | — | Michigan |
| 61 | Louise Beaudette | 64 | Wife | — | Michigan |
| 62 | Mabel Allen | 62 | Housekeeper | Housekeeper | Michigan |
| 63 | Irving Darwin | 61 | Head | Manager, Lumber Co. | Michigan |
| 64 | Grace Darwin | 60 | Wife | — | Michigan |
| 65 | Margaret E. Darwin | 23 | Daughter | Teacher | Michigan |
| 66 | Donald Pernucli | 46 | Head | Station Salesman | Florida |
| 67 | Julia Pernucli | 45 | Wife | — | Michigan |
| 68 | Pearl Jane Pernucli | 16 | Daughter | — | Michigan |
| 69 | Annie Mae Rockwell | 71 | Mother-in-law | — | Michigan |
| 70 | Freeman Itsworth | 68 | Head | Salesman | Michigan |
| 71 | Mamie Itsworth | 67 | Wife | — | Michigan |
| 72 | Gertrude Epworth | 26 | Niece | Beauty Operator | Michigan |
| 73 | Lloyd Runberg | 45 | Head | Asst Manager | Illinois |
| 74 | Frances Runberg | 45 | Wife | — | Illinois |
| 75 | Mary Ellen Runberg | 20 | Daughter | Clerk | Illinois |
| 76 | Jean Runberg | 18 | Daughter | Salesgirl | Illinois |
| 77 | Rosalie Runberg | 15 | Daughter | — | Illinois |
| 78 | Lloyd Runberg | 9 | Son | — | Michigan |
| 79 | Frank Vibbert | 67 | Head | Borer | Michigan |
| 80 | Effie Vibbert | 61 | Wife | — | Michigan |
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)