JP
James Peterson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Lake-County, Indiana
Our Model Tree links this James Peterson across the 1930 and 1940 US Censuses in Lake-County, Indiana (XGBoost, ~Confirmed) — first a son (b.~1921), then head of a 12-person household.
Age 19
b. ~1921
Male
Son
Born: Mississippi
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Lake-County, Indiana |
| Surname | Peterson |
| Given Name | James Jr |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Mississippi |
| 1935 Residence (City) | Gary |
| 1935 Residence (County) | Lake |
| Additional Details | |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Mississippi |
| Birth Country | United States |
| Birthplace (normalized) | mississippi |
| Township / Ward | Gary |
| Est. Birth Year | ~1921 |
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.
12 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to James | Age | Birth yr |
|---|---|---|---|---|
| Bernice Peterson | Daughter | — | 8 | ~1932 |
| Beatrice Peterson | Daughter | — | 17 | ~1923 |
| Wilma Peterson | Daughter | — | 6 | ~1934 |
| James Peterson | Head | — | 39 | ~1901 |
| Hosea Parker | Other | — | 53 | ~1887 |
| Alfred Peterson | Son | — | 15 | ~1925 |
| Clarence Peterson | Son | — | 5 | ~1935 |
| Walter Peterson | Son | — | 1 | ~1939 |
| Charlie Peterson | Son | — | 10 | ~1930 |
| James Peterson | Son | — | 19 | ~1921 |
| Maurice Peterson | Son | — | 2 | ~1938 |
| Carrie Peterson | Spouse | — | 37 | ~1903 |
Census Appearances
1930
Lake, Indiana
Son, age 9
Lake, Indiana · implied b. ~1921 — 11 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Peterson |
| Given Name | James Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 9 |
| Marital Status | Single |
| Birthplace | Mississippi |
| Father's Birthplace | Louisiana |
| Mother's Birthplace | Louisiana |
| Can Read/Write | Yes |
| Birth State | Mississippi |
| Birth Country | United States |
| Birthplace (normalized) | mississippi |
1940
Lake-County, Indiana
Son, age 19
Lake-County, Indiana · implied b. ~1921 — 12 household members
| Surname | Peterson |
| Given Name | James Jr |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Mississippi |
| 1935 Residence (City) | Gary |
| 1935 Residence (County) | Lake |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Mississippi |
| Birth Country | United States |
| Birthplace (normalized) | mississippi |
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 Peterson across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
James Peterson
Son · 1940 · age 19 · b. ~1921 · Indiana
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Sibling
Walter Peterson
Sibling · 1940 · age 1
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Bernice Peterson
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Alfred Peterson
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Beatrice Peterson
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Maurice Peterson
Sibling · 1940 · age 2
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Charlie Peterson
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Clarence Peterson
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Wilma Peterson
Sibling · 1940 · age 6
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 — Lake-County, Indiana
Open full size
1940 US Federal Census — Lake-County, Indiana
Page Contents
22 people indexed on this census page (nara:1940:m-t0627-01121-00359)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Andrew Jr Graham | 11 | Son | — | Illinois |
| 42 | Inez Graham | 9 | Daughter | — | Illinois |
| 43 | James Williams | 55 | Head | Laborer | Arkansas |
| 44 | Gertrude Williams | 51 | Wife | — | Arkansas |
| 45 | James Jr Williams | 22 | Son | Laborer | Arkansas |
| 46 | Munroe Williams | 20 | Son | Laborer | Arkansas |
| 47 | Virgil Williams | 17 | Daughter | — | Tennessee |
| 48 | Richard Williams | 15 | Son | Chauffeur | Illinois |
| 49 | Herbert Williams | 11 | Son | — | Indiana |
| 50 | George Williams | 2 | Son | — | Indiana |
| 51 | James Peterson | 39 | Head | Laborer | Louisiana |
| 52 | Carrie Peterson | 37 | Wife | — | Louisiana |
| 53 | James Jr Peterson THIS PERSON | 19 | Son | — | Mississippi |
| 54 | Beatrice Peterson | 17 | Daughter | — | Mississippi |
| 55 | Alfred Peterson | 15 | Son | — | Mississippi |
| 56 | Charlie Peterson | 10 | Son | — | Indiana |
| 57 | Bernice Peterson | 8 | Daughter | — | Indiana |
| 58 | Wilma Peterson | 6 | Daughter | — | Indiana |
| 59 | Clarence Peterson | 5 | Son | — | Indiana |
| 60 | Maurice Peterson | 2 | Son | — | Indiana |
| 61 | Walter Peterson | 1 | Son | — | Indiana |
| 62 | Hosea Parker | 53 | Lodger | Laborer | Mississippi |
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)