TB
Thomas Black — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Lake-County, Illinois
Our Model Tree links this Thomas Black across the 1930 and 1940 US Censuses in Lake-County, Illinois (XGBoost, ~Confirmed) — first a son (b.~1930), then head of a 7-person household.
Age 10
b. ~1930
Male
Son
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Lake-County, Illinois |
| Surname | Black |
| Given Name | Thomas |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Waukegan City |
| 1935 Residence (County) | Lake |
| Additional Details | |
| Highest Grade | 4 |
| 1935 Residence | Same Place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Waukegan City |
| Est. Birth Year | ~1930 |
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 Thomas | Age | Birth yr |
|---|---|---|---|---|
| Eugene Black | Son | — | 16 | ~1924 |
| Henry Black | Head | — | 42 | ~1898 |
| Carol Black | Daughter | — | 13 | ~1927 |
| John Black | Son | — | 15 | ~1925 |
| Thomas Black | Son | — | 10 | ~1930 |
| Daniel Black | Son | — | 6 | ~1934 |
| Edna Black | Spouse | — | 41 | ~1899 |
Census Appearances
1930
Lake, Illinois
Son, age 1
Lake, Illinois · implied b. ~1929 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Bleck |
| Given Name | Thomas |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Wisconsin |
| Mother's Birthplace | Wisconsin |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Lake-County, Illinois
Son, age 10
Lake-County, Illinois · implied b. ~1930 — 7 household members
| Surname | Black |
| Given Name | Thomas |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Waukegan City |
| 1935 Residence (County) | Lake |
| Highest Grade | 4 |
| 1935 Residence | Same Place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
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 Thomas Black across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Thomas Black
Son · 1940 · age 10 · b. ~1930 · Illinois
★ You are viewing this record
Sibling
Eugene Black
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Black
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Carol Black
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Daniel Black
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, Illinois
Open full size
1940 US Federal Census — Lake-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00831-00313)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Arthur P. Lake | 53 | Head | Proprietor Manager | Illinois |
| 2 | Ethel Lake | 53 | Wife | — | Illinois |
| 3 | Genevieve Scott | 39 | Lodger | Teacher | Minnesota |
| 4 | Henry Black | 42 | Head | Engineer | Wisconsin |
| 5 | Edna Black | 41 | Wife | — | Wisconsin |
| 6 | Eugene Black | 16 | Son | Newsboy | Wisconsin |
| 7 | John H. Black | 15 | Son | Newsboy | Wisconsin |
| 8 | Carol Black | 13 | Daughter | — | Illinois |
| 9 | Thomas Black THIS PERSON | 10 | Son | — | Illinois |
| 10 | Daniel Black | 6 | Son | — | Illinois |
| 11 | William E. Albright | 52 | Head | Manager | Illinois |
| 12 | Mary B. Albright | 53 | Wife | — | Wisconsin |
| 13 | Mary Albright | 16 | Daughter | — | Illinois |
| 14 | Roscoe C. Sherman | 56 | Head | Insurance Agent | Illinois |
| 15 | Ida J. Sherman | 54 | Wife | — | Canada-Eng |
| 16 | H. Jean Sherman | 26 | Daughter | General Office Clerk | Illinois |
| 17 | Roscoe C. Jr. Sherman | 24 | Son | General Office Clerk | Illinois |
| 18 | Howard Garmant | 45 | Head | Driver | Iowa |
| 19 | Isabelle Garmant | 42 | Wife | — | Illinois |
| 20 | Shirley Garmant | 12 | Daughter | — | Illinois |
| 21 | Irving Walker | 41 | Brother-in-law | Pump Tender | Illinois |
| 22 | Elmer Macarthur | 40 | Brother-in-law | Trainman | Georgia |
| 23 | Seymour P. Katz | 29 | Head | Physician | Illinois |
| 24 | Ruth Katz | 29 | Wife | — | Illinois |
| 25 | Gerald H. Katz | 1 | Son | — | Illinois |
| 26 | Esther Gustafson | 20 | Servant | Servant | Michigan |
| 27 | Oscar Utter | 61 | Head | Machinist | Sweden |
| 28 | Ellen M. Utter | 62 | Wife | — | Sweden |
| 29 | Eleanor M. Utter | 30 | Daughter | — | Illinois |
| 30 | Max Goodman | 50 | Head | Electrical Wiring | Russia |
| 31 | Sylvia Goodman | 42 | Wife | — | Russia |
| 32 | Howard Goodman | 21 | Son | Salesman | Illinois |
| 33 | William Goodman | 18 | Son | — | Illinois |
| 34 | Gloria Goodman | 6 | Daughter | — | Illinois |
| 35 | Henry D. Fisher | 31 | Head | Attorney | Illinois |
| 36 | Elaine Fisher | 27 | Wife | — | Wisconsin |
| 37 | Harry R. Tompkins | 42 | Head | Lineman | Illinois |
| 38 | Ruth Tompkins | 41 | Wife | — | Missouri |
| 39 | Kenneth Tompkins | 18 | Son | — | Illinois |
| 40 | Wesley Tompkins | 16 | Son | Newsboy | 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)