JG
John Griffin — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this John Griffin across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a head (b.~1876), then head of a 4-person household.
Age 64
b. ~1876
Male
Head
Born: Kentucky
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Griffin |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | Black |
| Age | 64 |
| Marital Status | Married |
| Birthplace | Kentucky |
| 1935 Residence (City) | Evanston city |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Occupation | Laborer |
| Industry | Job work |
| Class of Worker | OA |
| Hours Worked | 40 |
| Income (1939) | 988 |
| Highest Grade | No 3 |
| 1935 Residence | Same house |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
| Occupation | Laborer |
| Township / Ward | Evanston City |
| Est. Birth Year | ~1876 |
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 John | Age | Birth yr |
|---|---|---|---|---|
| Jessie Griffin | Daughter | — | 39 | ~1901 |
| Hazel Montgomery | Daughter | — | 40 | ~1900 |
| John Griffin | Head | — | 64 | ~1876 |
| Cora Griffin | Spouse | — | 62 | ~1878 |
Census Appearances
1920
Cook, Illinois
Head, age 44
Cook, Illinois · implied b. ~1876 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Griffin |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | Black |
| Age | 44 |
| Marital Status | Married |
| Birthplace | Kentucky |
| Father's Birthplace | Unknown |
| Mother's Birthplace | Kentucky |
| Occupation | Laborer |
| Industry | Steel Mill |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Home Owned/Rented | R |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
1930
Cook, Illinois
Head, age 54
Cook, Illinois · implied b. ~1876 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Griffen |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | Black |
| Age | 54 |
| Marital Status | Married |
| Birthplace | Kentucky |
| Age at First Marriage | 21 |
| Father's Birthplace | Kentucky |
| Mother's Birthplace | Kentucky |
| Occupation | Chauffeur |
| Industry | Private Family |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Home Value / Rent | 7500 |
| Radio Set | R |
| Veteran | No |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
1940
Cook-County, Illinois
Head, age 64
Cook-County, Illinois · implied b. ~1876 — 4 household members
| Surname | Griffin |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | Black |
| Age | 64 |
| Marital Status | Married |
| Birthplace | Kentucky |
| 1935 Residence (City) | Evanston city |
| 1935 Residence (County) | Cook |
| Occupation | Laborer |
| Industry | Job work |
| Class of Worker | OA |
| Hours Worked | 40 |
| Income (1939) | 988 |
| Highest Grade | No 3 |
| 1935 Residence | Same house |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
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 John Griffin across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Griffin
Head · 1940 · age 64 · b. ~1876 · Illinois
★ You are viewing this record
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-t0627-00779-00100)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Anna R. Bastien | 43 | Wife | — | Illinois |
| 2 | George R. Bastien | 14 | Son | — | Illinois |
| 3 | Betty Ann Bastien | 12 | Daughter | — | Illinois |
| 4 | Joseph Bastien | 74 | Father | — | Canada |
| 5 | Lee Ernest Summers | 44 | Head | Servant | Missouri |
| 6 | Grace Summers | 15 | Daughter | — | Illinois |
| 7 | Henry Summers | 12 | Son | — | Illinois |
| 8 | Frances Summers | 10 | Daughter | — | Illinois |
| 9 | John H. Hunter | 27 | Head | Laborer | Georgia |
| 10 | Delva Hunter | 24 | Wife | — | Georgia |
| 11 | Sam Peter | 35 | Head | Houseman | South Carolina |
| 12 | Ruth Peter | 33 | Wife | Servant | South Carolina |
| 13 | Mary R. Peter | 12 | Daughter | — | South Carolina |
| 14 | Helen Peter | 10 | Daughter | — | Illinois |
| 15 | Marilla Cashier | 44 | Lodger | — | Alabama |
| 16 | Oda Overstreet | 13 | Lodger | — | Arkansas |
| 17 | Ella Rose Horn | 55 | Head | Evangelist | South Carolina |
| 18 | Edmund W. Horn | 19 | Son | Evangelist | D.C. |
| 19 | Felix Nelleman | 29 | Lodger | Porter | South Carolina |
| 20 | Bertha Nelleman | 26 | Lodger | Servant | Illinois |
| 21 | Belzie Howard | 27 | Lodger | Laborer | South Carolina |
| 22 | Ernestine Howard | 30 | Lodger | Servant | South Carolina |
| 23 | Anna Martin | 32 | Servant | Servant | South Carolina |
| 24 | John Griffin THIS PERSON | 64 | Head | Laborer | Kentucky |
| 25 | Cora Griffin | 62 | Wife | Caterer | Louisiana |
| 26 | Jessie Griffin | 39 | Daughter | Caterer | Illinois |
| 27 | Hazel Montgomery | 40 | Daughter | Servant | Illinois |
| 28 | Wilber J. Jackson | 54 | Head | Janitor | Ohio |
| 29 | Lula Jackson | 50 | Wife | — | Kentucky |
| 30 | Jessie Lytle | 52 | Lodger | Servant | Kentucky |
| 31 | Marion Johnson | 22 | Head | Porter | Georgia |
| 32 | Mildred Johnson | 20 | Wife | — | Illinois |
| 33 | Meridith Johnson | 1 | Daughter | — | Illinois |
| 34 | Harvey Franklin | 49 | Nephew-in-law | Laborer | South Carolina |
| 35 | James Adams | 47 | Head | School Patrol | Florida |
| 36 | Frances Adams | 49 | Wife | — | North Carolina |
| 37 | William Nixon | 30 | Nephew | Presser | Illinois |
| 38 | Arabella Hill | 40 | Lodger | Servant | Iowa |
| 39 | Joseph O. Jackson | 62 | Head | Laborer | Georgia |
| 40 | William E. Rose | 50 | Head | Buyer | 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)