JG
Joseph Gray — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Joseph Gray across the 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a son (b.~1929), then head of a 8-person household.
Age 11
b. ~1929
Male
Son
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Gray |
| Given Name | Joseph |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | No 5 |
| 1935 Residence | Same house |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Chicago |
| Est. Birth Year | ~1929 |
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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Joseph | Age | Birth yr |
|---|---|---|---|---|
| William Gray | Head | — | 51 | ~1889 |
| Clara Gray | Daughter | — | 7 | ~1933 |
| William Gray | Son | — | 21 | ~1919 |
| Hannibal Gray | Son | — | 15 | ~1925 |
| Lillie Gray | Spouse | — | 49 | ~1891 |
| George Gray | Son | — | 19 | ~1921 |
| Vivian Gray | Daughter | — | 13 | ~1927 |
| Joseph Gray | Son | — | 11 | ~1929 |
Census Appearances
1930
Cook, Illinois
Son, age 1
Cook, Illinois · implied b. ~1929 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Gray |
| Given Name | Joseph |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Kentucky |
| Mother's Birthplace | Kentucky |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Son, age 11
Cook-County, Illinois · implied b. ~1929 — 8 household members
| Surname | Gray |
| Given Name | Joseph |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Income (1939) | 0 |
| Highest Grade | No 5 |
| 1935 Residence | Same house |
| 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 Joseph Gray across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Joseph Gray
Son · 1940 · age 11 · b. ~1929 · Illinois
★ You are viewing this record
Sibling
Hannibal Gray
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Vivian Gray
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
George Gray
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Clara Gray
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Gray
Sibling · 1940 · age 21
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 — Cook-County, Illinois
Open full size
1940 US Federal Census — Cook-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00926-00904)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | James Mancari | 21 | Head | — | Illinois |
| 2 | Rose Mancari | 22 | Wife | Machine Operator | Illinois |
| 3 | Dan Ford | 33 | Head | Laborer | Illinois |
| 4 | Gladys Ford | 27 | Wife | — | Illinois |
| 5 | Dan Jr. Ford | 5 | Son | — | Illinois |
| 6 | Ronald Ford | 4 | Son | — | Illinois |
| 7 | Joan Ford | 1 | Daughter | — | Illinois |
| 8 | James Holman | 29 | Lodger | Labor | Tennessee |
| 9 | Rose Isola | 32 | Lodger | Seamstress | Illinois |
| 10 | Lucy Isola | 14 | Lodger | — | Illinois |
| 11 | Katie Grant | 66 | Head | — | Georgia |
| 12 | Mary Pettis | 70 | Lodger | — | Georgia |
| 13 | Henry Smith | 56 | Head | — | Arkansas |
| 14 | Robert Does | 54 | Head | Laborer | Alabama |
| 15 | Annie Mae Does | 50 | Wife | — | Georgia |
| 16 | Mary Reynolds | 26 | Daughter | Curtain Stretcher | Georgia |
| 17 | Rose Mary Hayes | 11 | Granddaughter | — | Illinois |
| 18 | Andrew Baker | 46 | Head | Laborer | Mississippi |
| 19 | Joyce Baker | 29 | Wife | — | Arkansas |
| 20 | Hopsie Robinson | 68 | Lodger | — | Mississippi |
| 21 | William Gray | 51 | Head | — | Kentucky |
| 22 | Lillie Gray | 49 | Wife | — | Kentucky |
| 23 | William Jr. Gray | 21 | Son | Laborer | Kentucky |
| 24 | George Gray | 19 | Son | — | Kentucky |
| 25 | Hannibal Gray | 15 | Son | New Worker | Kentucky |
| 26 | Vivian Gray | 13 | Daughter | — | Kentucky |
| 27 | Joseph Gray THIS PERSON | 11 | Son | — | Illinois |
| 28 | Clara Gray | 7 | Daughter | — | Illinois |
| 29 | Frank Biangmano | 47 | Head | Spring Trimmer | Italy |
| 30 | Alice Biangmano | 41 | Wife | — | Colorado |
| 31 | John Biangmano | 24 | Son | Laborer | Illinois |
| 32 | John Rich | 47 | Head | — | Illinois |
| 33 | Dora Rich | 40 | Wife | — | Illinois |
| 34 | Joseph Rich | 23 | Son | — | Illinois |
| 35 | Josephine Rich | 21 | Daughter | Laborer | Illinois |
| 36 | James Rich | 20 | Son | Laborer | Illinois |
| 37 | Anthony Rich | 16 | Son | — | Illinois |
| 38 | Justine Rich | 11 | Daughter | — | Illinois |
| 39 | Joseph Pelegrino | 32 | Head | Salesman | Illinois |
| 40 | Carmella Pelegrino | 28 | Wife | — | 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)