JG
John Griffith — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Winnebago-County, Illinois
Our Model Tree links this John Griffith across the 1920, 1930 and 1940 US Censuses in Winnebago-County, Illinois (XGBoost, ~Confirmed) — first a head (b.~1875), then head of a 5-person household.
Age 65
b. ~1875
Male
Head
Born: Illinois
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Winnebago-County, Illinois |
| Surname | Griffith |
| Given Name | John C. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 65 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Rockton Village |
| 1935 Residence (County) | Winnebago |
| Additional Details | |
| Class of Worker | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same house |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Rockton Village |
| Est. Birth Year | ~1875 |
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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Marie Griffith | Daughter | — | 20 | ~1920 |
| Florence Griffith | Daughter | — | 22 | ~1918 |
| Marian Griffith | Daughter | — | 20 | ~1920 |
| John Griffith | Head | — | 65 | ~1875 |
| Alice Griffith | Spouse | — | 60 | ~1880 |
Census Appearances
1920
Winnebago, Illinois
Head, age 45
Winnebago, Illinois · implied b. ~1875 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Griffiths |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 45 |
| Marital Status | Married |
| Birthplace | Illinois |
| Father's Birthplace | Wales |
| Mother's Birthplace | England |
| Occupation | Farmer |
| Industry | General farm |
| Class of Worker | OA |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Home Owned/Rented | O |
| Home Free/Mortgaged | M |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Winnebago, Illinois
Head, age 55
Winnebago, Illinois · implied b. ~1875 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Griffiths |
| Given Name | John C |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 55 |
| Marital Status | Married |
| Birthplace | Illinois |
| Age at First Marriage | 26 |
| Father's Birthplace | Wales |
| Mother's Birthplace | England |
| Occupation | Farmer |
| Industry | Farming |
| Class of Worker | OA |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Home Value / Rent | 4000 |
| Radio Set | R |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Winnebago-County, Illinois
Head, age 65
Winnebago-County, Illinois · implied b. ~1875 — 5 household members
| Surname | Griffith |
| Given Name | John C. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 65 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Rockton Village |
| 1935 Residence (County) | Winnebago |
| Class of Worker | 0 |
| Highest Grade | No 8 |
| 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 John Griffith across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Griffith
Head · 1940 · age 65 · b. ~1875 · Illinois
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Winnebago-County, Illinois
Open full size
1940 US Federal Census — Winnebago-County, Illinois
Page Contents
36 people indexed on this census page (nara:1940:m-t0627-00915-00705)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Lawrence Reedy | 28 | Head | Drill Press Operator | Iowa |
| 42 | Florence Reedy | 22 | Wife | — | Wisconsin |
| 43 | Patsy Reedy | 1 | Daughter | — | Wisconsin |
| 44 | Richard Reedy | 0 | Son | — | Wisconsin |
| 46 | Lafayette Truman | 56 | Head | Janitor | Illinois |
| 47 | Minnie Truman | 51 | Wife | — | Illinois |
| 48 | Burdette Truman | 81 | Father | — | Illinois |
| 49 | Chris Bauer | 79 | Roomer | — | New York |
| 50 | Jack Lovelace | 25 | Head | Delivery Man | Illinois |
| 51 | Ellanor Lovelace | 27 | Wife | Beauty Operator | Illinois |
| 52 | George Carroll | 30 | Head | Section Foreman | Iowa |
| 53 | Alice Carroll | 30 | Wife | — | Illinois |
| 54 | James Carroll | 5 | Son | — | Illinois |
| 55 | Fred A. Garver | 56 | Head | Tool Maker | Illinois |
| 56 | Elma Garver | 43 | Wife | — | Iowa |
| 57 | Harry Jr. Beck | 43 | Head | Erecter | Iowa |
| 58 | Leona Beck | 43 | Wife | — | Illinois |
| 59 | Edith Beck | 22 | Daughter | — | Illinois |
| 60 | Forrest Beck | 18 | Son | Office Work | Illinois |
| 61 | Sally Beck | 1 | Granddaughter | — | Wisconsin |
| 62 | Hollis Andrews | 42 | Head | Truck Driver | Illinois |
| 63 | Velva Andrews | 47 | Wife | — | Wisconsin |
| 64 | Glenn Andrews | 11 | Son | — | Wisconsin |
| 66 | Anna Paulett | 50 | Head | Laundry | Illinois |
| 67 | Margaret Paulett | 23 | Daughter | Secretary | Wisconsin |
| 68 | Lizzie Gleasman | 73 | Head | — | Wisconsin |
| 69 | Harry Sander | 48 | Son-in-law | Mechanical Engineer | Wisconsin |
| 70 | Marie Sander | 45 | Wife | — | Illinois |
| 71 | Janet Sander | 8 | Daughter | — | Wisconsin |
| 72 | John C. Griffith THIS PERSON | 65 | Head | — | Illinois |
| 73 | Alice Griffith | 60 | Wife | — | Illinois |
| 74 | Florence Griffith | 22 | Daughter | — | Illinois |
| 75 | Marie Griffith | 20 | Daughter | — | Illinois |
| 76 | Marian Griffith | 20 | Daughter | — | Illinois |
| 77 | James Vivian | 55 | Head | Mill Wright Man | Illinois |
| 78 | Josephine Vivian | 55 | 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)