JG
John Griffin — 1940 US Census Record
Model Tree available1940 United States Federal Census · Rockcastle-County, Kentucky
Our Model Tree links this John Griffin across the 1920, 1930 and 1940 US Censuses in Rockcastle-County, Kentucky (XGBoost, ~Confirmed), with identified parents Albert & Ellen — first a head (b.~1903), then head of a 4-person household.
Age 37
b. ~1903
Male
Head
Born: Kentucky
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Rockcastle-County, Kentucky |
| Surname | Griffin |
| Given Name | John W. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 37 |
| Marital Status | Married |
| Birthplace | Kentucky |
| 1935 Residence (City) | Mt. Vernon Town |
| 1935 Residence (County) | Rockcastle |
| Additional Details | |
| Occupation | Salesman |
| Industry | Wholesale Grocery Co. |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 2200 |
| Highest Grade | No 8 |
| 1935 Residence | Same House |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
| Occupation | Salesman |
| Township / Ward | Mt Vernon Town |
| Est. Birth Year | ~1903 |
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 |
|---|---|---|---|---|
| Alma Griffin | Daughter | — | 14 | ~1926 |
| Elizabeth Griffin | Daughter | — | 9 | ~1931 |
| John Griffin | Head | — | 37 | ~1903 |
| Ethel Griffin | Spouse | — | 36 | ~1904 |
Census Appearances
1920
Rockcastle, Kentucky
Son, age 16
Rockcastle, Kentucky · implied b. ~1904 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Griffin |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Kentucky |
| Father's Birthplace | Kentucky |
| Mother's Birthplace | Kentucky |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
1930
Rockcastle, Kentucky
Head, age 27
Rockcastle, Kentucky · implied b. ~1903 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Griffin |
| Given Name | John W. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Married |
| Birthplace | Kentucky |
| Age at First Marriage | 25 |
| Father's Birthplace | Kentucky |
| Mother's Birthplace | Kentucky |
| Occupation | Supervisor |
| Industry | State Highway |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 15.00 |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
1940
Rockcastle-County, Kentucky
Head, age 37
Rockcastle-County, Kentucky · implied b. ~1903 — 4 household members
| Surname | Griffin |
| Given Name | John W. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 37 |
| Marital Status | Married |
| Birthplace | Kentucky |
| 1935 Residence (City) | Mt. Vernon Town |
| 1935 Residence (County) | Rockcastle |
| Occupation | Salesman |
| Industry | Wholesale Grocery Co. |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 2200 |
| Highest Grade | No 8 |
| 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. Identified parents: father Albert Griffin (~0.92 confidence) and mother Ellen Griffin (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Albert Griffin
b. ~1875
Source father
● Household
· direct · ~0.92
Mother
Ellen Griffin
b. ~1885
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Griffin
Head · 1940 · age 37 · b. ~1903 · Kentucky
★ 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 — Rockcastle-County, Kentucky
Open full size
1940 US Federal Census — Rockcastle-County, Kentucky
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01353-00114)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Willard B. Langford | 14 | Son | — | Kentucky |
| 2 | Willie Mae Langford | 12 | Daughter | — | Kentucky |
| 3 | Ruth Helen Langford | 9 | Daughter | — | Kentucky |
| 4 | Betty Jean Langford | 7 | Daughter | — | Kentucky |
| 5 | Herbert Griffin | 44 | Head | Electrician | Kentucky |
| 6 | Cleo Griffin | 39 | Wife | — | Kentucky |
| 7 | Audrey Griffin | 13 | Daughter | — | Kentucky |
| 8 | Flora Jean Griffin | 11 | Daughter | — | Ohio |
| 9 | Edward S. Griffin | 8 | Son | — | Kentucky |
| 10 | Doris Gwen Griffin | 6 | Daughter | — | Kentucky |
| 11 | George L. Mc Kenzie | 37 | Head | Supervisor | Kentucky |
| 12 | Mallie Mc Kenzie | 77 | Mother | — | Kentucky |
| 13 | Ray Cummins | 37 | Head | Bookkeeper | Kentucky |
| 14 | Fannie Cummins | 33 | Wife | — | Kentucky |
| 15 | Robert W. Cummins | 12 | Son | — | Kentucky |
| 16 | Kenneth Cummins | 8 | Son | — | Kentucky |
| 17 | Paul Cummins | 6 | Son | — | Kentucky |
| 18 | Ernest Chestnut | 23 | Head | Laborer | Kentucky |
| 19 | Ruth Chestnut | 15 | Wife | — | Kentucky |
| 20 | Basil Boring | 35 | Head | Laborer | Kentucky |
| 21 | Winnie Boring | 36 | Wife | — | Kentucky |
| 22 | William Boring | 17 | Son | Laborer | Kentucky |
| 23 | Edna Boring | 7 | Daughter | — | Kentucky |
| 24 | Flora B. Price | 58 | Head | — | Kentucky |
| 25 | Ruben Baker | 70 | Brother | — | Kentucky |
| 26 | Start Here April 3 | None | — | — | — |
| 27 | John W. Griffin THIS PERSON | 37 | Head | Salesman | Kentucky |
| 28 | Ethel Griffin | 36 | Wife | — | Kentucky |
| 29 | Alma Jean Griffin | 14 | Daughter | — | Kentucky |
| 30 | Elizabeth Griffin | 9 | Daughter | — | Kentucky |
| 31 | Thos. J. Nicely | 64 | Head | Clerk | Kentucky |
| 32 | Lucy Nicely | 62 | Wife | — | Kentucky |
| 33 | Lewis A. Nicely | 21 | Son | — | Kentucky |
| 34 | Nell Wanda Nicely | 18 | Daughter | — | Kentucky |
| 35 | Thelma Arnold | 17 | Servant | Servant | Kentucky |
| 36 | James M. Cummins | 20 | Head | Laborer | Kentucky |
| 37 | Lula D. Cummins | 49 | Mother | — | Kentucky |
| 38 | Daisy Hanceil | 24 | Sister | — | Kentucky |
| 39 | Rainey Cummins | 18 | Brother | — | Kentucky |
| 40 | Ora Mc Cracken | 31 | Head | — | Kentucky |
Pedigree Summary
John
Gen 1 · 2 parents
~0.92
Max depth 4 (1900–1950 window)
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)