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Robert Griffin — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Robert Griffin across the 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a son (b.~1925), then head of a 12-person household.
Age 15
b. ~1925
Male
Son
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Griffin |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Harvey City |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Highest Grade | H 1 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Harvey City |
| Est. Birth Year | ~1925 |
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 Robert | Age | Birth yr |
|---|---|---|---|---|
| Carol Griffin | Daughter | — | 5 | ~1935 |
| David Griffin | Son | — | 2 | ~1938 |
| Sharon Griffin | Daughter | — | 2 | ~1938 |
| Frederick Griffin | Head | — | 42 | ~1898 |
| John Griffin | Son | — | 13 | ~1927 |
| Shirley Griffin | Daughter | — | 9 | ~1931 |
| Fred Griffin | Son | — | 11 | ~1929 |
| Robert Griffin | Son | — | 15 | ~1925 |
| Barbara Griffin | Daughter | — | 3 | ~1937 |
| Patricia Griffin | Daughter | — | 3 | ~1937 |
| Ronald Griffin | Son | — | 7 | ~1933 |
| Augusta Griffin | Spouse | — | 37 | ~1903 |
Census Appearances
1930
Cook, Illinois
Son, age 5
Cook, Illinois · implied b. ~1925 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Griffin |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Son, age 15
Cook-County, Illinois · implied b. ~1925 — 12 household members
| Surname | Griffin |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Harvey City |
| 1935 Residence (County) | Cook |
| Highest Grade | H 1 |
| 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 Robert Griffin across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Robert Griffin
Son · 1940 · age 15 · b. ~1925 · Illinois
★ You are viewing this record
Sibling
Fred Griffin
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ronald Griffin
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
David Griffin
Sibling · 1940 · age 2
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Patricia Griffin
Sibling · 1940 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Carol Griffin
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Griffin
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Shirley Griffin
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Sharon Griffin
Sibling · 1940 · age 2
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Barbara Griffin
Sibling · 1940 · age 3
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-t0627-00774-00882)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Jessie D. Drake | 60 | Head | Inspector | Missouri |
| 2 | Mabel F. Drake | 60 | Wife | — | Illinois |
| 3 | Jessie Jessie | 34 | Daughter | — | Illinois |
| 4 | Doris J. Jessie | 11 | Granddaughter | — | Illinois |
| 5 | William B. Cooke | 33 | Son | Die Sinker | Illinois |
| 6 | Ruth Cooke | 31 | Daughter-in-law | — | Illinois |
| 7 | Doris Cooke | 6 | Granddaughter | — | Illinois |
| 8 | Francis Cranson | 69 | Head | — | Ohio |
| 9 | Joseph A. Fiser | 66 | Head | Iron Worker | Ohio |
| 10 | Ema Fiser | 46 | Wife | — | Missouri |
| 11 | George Fiser | 16 | Son | — | Missouri |
| 12 | Richard Fiser | 14 | Son | — | Illinois |
| 13 | Donald Fiser | 5 | Son | — | Illinois |
| 14 | Frederick Griffin | 42 | Head | Clerk | Indiana |
| 15 | Augusta Griffin | 37 | Wife | — | Indiana |
| 16 | Robert Griffin THIS PERSON | 15 | Son | — | Illinois |
| 17 | John Griffin | 13 | Son | — | Illinois |
| 18 | Fred Griffin | 11 | Son | — | Illinois |
| 19 | Shirley Griffin | 9 | Daughter | — | Illinois |
| 20 | Ronald Griffin | 7 | Son | — | Illinois |
| 21 | Carol Griffin | 5 | Daughter | — | Illinois |
| 22 | Barbara Griffin | 3 | Daughter | — | Illinois |
| 23 | Patricia Griffin | 3 | Daughter | — | Illinois |
| 24 | Sharon Griffin | 2 | Daughter | — | Illinois |
| 25 | David Griffin | 2 | Son | — | Illinois |
| 26 | Orlando J. Bower | 75 | Head | — | Michigan |
| 27 | Nettie M. Bower | 71 | Wife | — | Michigan |
| 28 | Nettie M. Bower | 44 | Daughter | Stenographer | Illinois |
| 29 | Margaret Charestan | 53 | Head | Ticket Clerk | Illinois |
| 30 | Griffith Caroline Charestan | 55 | Sister | — | Illinois |
| 31 | Hugo Knauer | 64 | Head | Machinist | Germany |
| 32 | Maria Knauer | 55 | Wife | — | Germany |
| 33 | Elmer C. Benner | 47 | Lodger | Bookkeeper | Washington |
| 34 | Robert E. Benner | 45 | Lodger | Mechanic | Illinois |
| 35 | John Bentkowski | 25 | Head | Painter | Illinois |
| 36 | Eleanor Bentkowski | 29 | Wife | — | Illinois |
| 37 | Dale Bentkowski | 5 | Son | — | Illinois |
| 38 | John Siolla | 25 | Head | Chipper | Illinois |
| 39 | Mary Siolla | 22 | Wife | — | Indiana |
| 40 | Bernard Hainsworth | 34 | Head | Switchman | 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)