JF
John Frederick — 1940 US Census Record
Model Tree available1940 United States Federal Census · Buchanan-County, Missouri
Our Model Tree links this John Frederick across the 1920, 1930 and 1940 US Censuses in Buchanan-County, Missouri (XGBoost, ~Confirmed), with identified parents John & John — first a head (b.~1909), then head of a 5-person household.
Age 31
b. ~1909
Male
Head
Born: Missouri
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Buchanan-County, Missouri |
| Surname | Frederick |
| Given Name | John D. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 31 |
| Marital Status | Married |
| Birthplace | Missouri |
| 1935 Residence (City) | St. Joseph city |
| 1935 Residence (County) | Buchanan |
| Additional Details | |
| Occupation | Lawyer |
| Industry | General Practice |
| Class of Worker | OA |
| Hours Worked | 44 |
| Income (1939) | 26 |
| Highest Grade | C 5 |
| 1935 Residence | Same Place |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
| Occupation | Lawyer |
| Township / Ward | St Joseph City |
| Est. Birth Year | ~1909 |
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 |
|---|---|---|---|---|
| Ida Frederick | Spouse | — | 28 | ~1912 |
| John Frederick | Head | — | 31 | ~1909 |
| Nancy Erwin | Other | — | 23 | ~1917 |
| Garnet Korn | Other | — | 21 | ~1919 |
| John Frederick | Son | — | 3 | ~1937 |
Census Appearances
1920
Buchanan, Missouri
Son, age 11
Buchanan, Missouri · implied b. ~1909 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Frederick |
| Given Name | John W. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Missouri |
| Naturalization Status | Naturalized |
| Father's Birthplace | Missouri |
| Mother's Birthplace | Indiana |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
1930
Buchanan, Missouri
Son, age 21
Buchanan, Missouri · implied b. ~1909 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Frederick |
| Given Name | John R. Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Missouri |
| Father's Birthplace | Missouri |
| Mother's Birthplace | Missouri |
| Occupation | Chauffeur |
| Industry | Bakery |
| Class of Worker | W |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
1940
Buchanan-County, Missouri
Head, age 31
Buchanan-County, Missouri · implied b. ~1909 — 5 household members
| Surname | Frederick |
| Given Name | John D. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 31 |
| Marital Status | Married |
| Birthplace | Missouri |
| 1935 Residence (City) | St. Joseph city |
| 1935 Residence (County) | Buchanan |
| Occupation | Lawyer |
| Industry | General Practice |
| Class of Worker | OA |
| Hours Worked | 44 |
| Income (1939) | 26 |
| Highest Grade | C 5 |
| 1935 Residence | Same Place |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
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 Frederick across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father John Frederick (~0.92 confidence) and father John Frederick (~0.92 confidence) and mother Nancy Frederick (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
John Frederick
b. ~1865
Source father
● Household
· direct · ~0.92
Father
John Frederick
b. ~1872
Source father
● Household
· direct · ~0.92
Mother
Nancy Frederick
b. ~1869
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Frederick
Head · 1940 · age 31 · b. ~1909 · Missouri
★ 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 — Buchanan-County, Missouri
Open full size
1940 US Federal Census — Buchanan-County, Missouri
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-02089-00054)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Francis Josephum | 44 | Wife | — | Missouri |
| 2 | Rose Marie Josephum | 19 | Daughter | — | Missouri |
| 3 | Ella J. Stewart | 59 | Head | Nursing | Iowa |
| 4 | Edward E. Lomax | 76 | Lodger | — | Illinois |
| 5 | Jesse Fridell | 56 | Head | Mechanic | Kansas |
| 6 | Emma Fridell | 55 | Wife | — | Nebraska |
| 7 | Melvin C. Bullock | 38 | Head | Real Estate, Loans, Investments | Missouri |
| 8 | Dora Bullock | 30 | Wife | — | Oklahoma |
| 9 | Willa Farnham | 11 | Step-daughter | — | Missouri |
| 10 | Francis A. Ewing | 38 | Head | Implement Dealer | Missouri |
| 11 | Clea Ewing | 36 | Wife | — | Missouri |
| 12 | Frank G. Ewing | 78 | Father | — | Missouri |
| 13 | George A. Bailey | 55 | Head | Plumbing Contractor | Wisconsin |
| 14 | Delia B. Bailey | 58 | Wife | — | Wisconsin |
| 15 | Blondine Weiderholt | 23 | Lodger | Saleslady | Missouri |
| 16 | Victor H. Winslow | 27 | Head | Special Delivery | Missouri |
| 17 | Phyllis Winslow | 22 | Wife | Machine Worker | Missouri |
| 18 | John D. Frederick THIS PERSON | 31 | Head | Lawyer | Missouri |
| 19 | Ida May Frederick | 28 | Wife | — | Missouri |
| 20 | John Irwin Frederick | 3 | Son | — | Missouri |
| 21 | Nancy Rose Erwin | 23 | Sister-in-law | Stenographer | Missouri |
| 22 | Garnet Korn | 21 | Lodger | Saleslady | Missouri |
| 23 | Robert J. Wilson | 58 | Head | Salesman | Canada |
| 24 | Mary C. Wilson | 58 | Wife | — | Nebraska |
| 25 | Robert J. Jr. Wilson | 15 | Son | — | Missouri |
| 26 | John G. Wilson | 11 | Son | — | Missouri |
| 27 | Bert Leighty | 64 | Head | — | Illinois |
| 28 | Jesse Leighty | 61 | Wife | — | Missouri |
| 29 | Martha Leighty | 28 | Daughter | Saleslady | Missouri |
| 30 | Gertrude Leighty | 26 | Daughter | Packer | Missouri |
| 31 | Bert Jr. Leighty | 34 | Head | Grocery Clerk | Missouri |
| 32 | Maxine M. Leighty | 43 | Wife | Bookkeeper | Missouri |
| 33 | Thomas E. Brady | 47 | Head | Shoe Salesman | Missouri |
| 34 | Mamie G. Brady | 38 | Wife | Forelady | Missouri |
| 35 | Gertrude Brandow | 58 | Head | Laundress | Iowa |
| 36 | Francis Brandow | 29 | Son | Salesman | Missouri |
| 37 | Audrey Brandow | 18 | Daughter | Cash Girl | Missouri |
| 38 | Harriett Jean Brandow | 14 | Daughter | — | Missouri |
| 39 | E. A. May | 27 | Lodger | Cleaner Helper | Missouri |
Pedigree Summary
John
Gen 1 · 3 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)