JG
John Griffin — 1940 US Census Record
Model Tree available1940 United States Federal Census · Olmsted-County, Minnesota
Our Model Tree links this John Griffin across the 1920, 1930 and 1940 US Censuses in Olmsted-County, Minnesota (XGBoost, ~Confirmed), with identified parents Chas & Charles — first a son (b.~1920), then head of a 5-person household.
Age 20
b. ~1920
Male
Son
Born: Minnesota
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Olmsted-County, Minnesota |
| Surname | Griffin |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Minnesota |
| 1935 Residence (City) | High Forest Twshp. |
| 1935 Residence (County) | Olmsted |
| Additional Details | |
| Occupation | farm labor |
| Industry | Agriculture |
| Class of Worker | NP |
| Hours Worked | 70 |
| Highest Grade | H 3 |
| 1935 Residence | Same house |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
| Occupation | Farm Laborer |
| Township / Ward | High Forest Twshp |
| Est. Birth Year | ~1920 |
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 |
|---|---|---|---|---|
| Dorothy Griffin | Daughter | — | 18 | ~1922 |
| Chas Griffin | Head | — | 46 | ~1894 |
| Joesph Griffin | Son | — | 15 | ~1925 |
| John Griffin | Son | — | 20 | ~1920 |
| Gertrude Griffin | Spouse | — | 43 | ~1897 |
Census Appearances
1920
Olmsted, Minnesota
Son, age
Olmsted, Minnesota · implied b. ~1920 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Griffin |
| Given Name | John E. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 0 |
| Marital Status | Single |
| Birthplace | Minnesota |
| Father's Birthplace | Minnesota |
| Mother's Birthplace | Minnesota |
| Occupation | none |
| Can Read | No |
| Can Write | No |
| Speaks English | No |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
1930
Olmsted, Minnesota
Son, age 10
Olmsted, Minnesota · implied b. ~1920 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Griffin |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Minnesota |
| Father's Birthplace | Minnesota |
| Mother's Birthplace | Minnesota |
| Can Read/Write | Yes |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
1940
Olmsted-County, Minnesota
Son, age 20
Olmsted-County, Minnesota · implied b. ~1920 — 5 household members
| Surname | Griffin |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Minnesota |
| 1935 Residence (City) | High Forest Twshp. |
| 1935 Residence (County) | Olmsted |
| Occupation | farm labor |
| Industry | Agriculture |
| Class of Worker | NP |
| Hours Worked | 70 |
| Highest Grade | H 3 |
| 1935 Residence | Same house |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
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 Chas Griffin (~0.92 confidence) and father Charles Griffin (~0.92 confidence) and mother Gertrude Griffin (~0.92 confidence) and mother Gertrude Griffin (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Chas Griffin
b. ~1894
Source father
● Household
· direct · ~0.92
Father
Charles Griffin
b. ~1894
Source father
● Household
· direct · ~0.92
Mother
Gertrude Griffin
b. ~1897
Source mother
● Household
· direct · ~0.92
Mother
Gertrude Griffin
b. ~1897
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Griffin
Son · 1940 · age 20 · b. ~1920 · Minnesota
★ You are viewing this record
Sibling
Dorothy Griffin
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joesph Griffin
Sibling · 1940 · age 15
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 — Olmsted-County, Minnesota
Open full size
1940 US Federal Census — Olmsted-County, Minnesota
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-01943-00650)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | John Kaldenberg | 15 | Daughter | Domestic | Minnesota |
| 2 | Evelyn Kaldenberg | 13 | Daughter | — | Minnesota |
| 3 | Lawrence W. Jordan | 39 | Head | Farmer | Iowa |
| 4 | Devera A. Jordan | 33 | Wife | — | Iowa |
| 5 | David L. Jordan | 11 | Son | — | Minnesota |
| 6 | Jean M. Jordan | 9 | Daughter | — | Minnesota |
| 7 | Paul D. Jordan | 8 | Son | — | Minnesota |
| 8 | Mary L. Jordan | 5 | Daughter | — | Minnesota |
| 9 | Richard J. Jordan | 3 | Son | — | Minnesota |
| 10 | John M. Jordan | 1 | Son | — | Minnesota |
| 11 | Herman Bashman | 36 | Head | Farmer | Germany |
| 12 | Elenora Bashman | 34 | Wife | — | Minnesota |
| 13 | George Bashman | 12 | Son | — | Minnesota |
| 14 | Norma Bashman | 9 | Daughter | — | Minnesota |
| 15 | Marlin Bashman | 6 | Son | — | Minnesota |
| 16 | Alice Bashman | 4 | Daughter | — | Minnesota |
| 17 | Chas. J. Griffin | 46 | Head | Farmer | Minnesota |
| 18 | Gertrude M. Griffin | 43 | Wife | — | Minnesota |
| 19 | John Griffin THIS PERSON | 20 | Son | Farm Labor | Minnesota |
| 20 | Dorothy E. Griffin | 18 | Daughter | New Worker | Minnesota |
| 21 | Joesph F. Griffin | 15 | Son | Farm Laborer | Minnesota |
| 23 | Ennis Ackerman | 57 | Head | Farmer | Minnesota |
| 24 | Hattie E. Ackerman | 53 | Wife | — | Iowa |
| 25 | Ennis D. Ackerman | 23 | Son | Farm Laborer | North Dakota |
| 26 | Garnes Ackerman | 15 | Son | — | North Dakota |
| 27 | Betty A. Ackerman | 13 | Daughter | — | North Dakota |
| 28 | Henry G. Heichel | 82 | In Law | — | Ohio |
| 29 | Garret C. Griffin | 79 | Head | Farmer | Minnesota |
| 30 | Catherine Hymes | 75 | Sister | — | Minnesota |
| 31 | Michael Fogarty | 59 | Nephew | — | Minnesota |
| 32 | Lloyd M. Freeman | 47 | Head | Farmer | Minnesota |
| 33 | Josephine Freeman | 38 | Wife | — | Minnesota |
| 34 | Lavern N. Freeman | 18 | Son | Farm Laborer | Minnesota |
| 35 | Marlis M. Freeman | 16 | Daughter | — | Minnesota |
| 36 | Donald T. Freeman | 14 | Son | — | Minnesota |
| 37 | James L. Freeman | 11 | Son | — | Minnesota |
| 38 | Infant Freeman | 0 | Son | — | Minnesota |
| 39 | James W. Kroek | 32 | Head | Farmer | Nebraska |
| 40 | Elizabeth Kroek | 59 | Mother | — | Minnesota |
Pedigree Summary
John + 2 siblings
Gen 1 · 4 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)