JF
John Frederick — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Calhoun-County, South Carolina
Our Model Tree links this John Frederick across the 1930 and 1940 US Censuses in Calhoun-County, South Carolina (XGBoost, ~Confirmed) — first a head (b.~1914), then head of a 7-person household.
Age 26
b. ~1914
Male
Head
Born: South Carolina
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Calhoun-County, South Carolina |
| Surname | Frederick |
| Given Name | John Jr |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | Black |
| Age | 26 |
| Marital Status | Married |
| Birthplace | South Carolina |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Calhoun |
| Additional Details | |
| Occupation | Wage hand |
| Industry | Farm |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 130 |
| Highest Grade | No 6 |
| 1935 Residence | South Carolina |
| Birth State | South Carolina |
| Birth Country | United States |
| Birthplace (normalized) | south carolina |
| Occupation | Wage Hand |
| Township / Ward | Lyons Township |
| Est. Birth Year | ~1914 |
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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Hannah Frederick | Daughter | — | 3 | ~1937 |
| Mary Frederick | Spouse | — | 26 | ~1914 |
| Milton Frederick | Son | — | 4 | ~1936 |
| James Frederick | Son | — | ~1940 | |
| John Frederick | Son | — | 7 | ~1933 |
| John Frederick | Head | — | 26 | ~1914 |
| Andie Frederick | Daughter | — | 6 | ~1934 |
Census Appearances
1930
Calhoun, South …
Son, age 14
Calhoun, South Carolina · implied b. ~1916 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Frederick |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 14 |
| Marital Status | Single |
| Birthplace | South Carolina |
| Father's Birthplace | South Carolina |
| Mother's Birthplace | South Carolina |
| Occupation | Laborer |
| Industry | General farm |
| Class of Worker | VVVV |
| Can Read/Write | Yes |
| Birth State | South Carolina |
| Birth Country | United States |
| Birthplace (normalized) | south carolina |
1940
Calhoun-County, South …
Head, age 26
Calhoun-County, South Carolina · implied b. ~1914 — 7 household members
| Surname | Frederick |
| Given Name | John Jr |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | Black |
| Age | 26 |
| Marital Status | Married |
| Birthplace | South Carolina |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Calhoun |
| Occupation | Wage hand |
| Industry | Farm |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 130 |
| Highest Grade | No 6 |
| 1935 Residence | South Carolina |
| Birth State | South Carolina |
| Birth Country | United States |
| Birthplace (normalized) | south carolina |
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 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Frederick
Head · 1940 · age 26 · b. ~1914 · South Carolina
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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 — Calhoun-County, South Carolina
Open full size
1940 US Federal Census — Calhoun-County, South Carolina
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03792-00279)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Sallie Mae Mack | 4 | Daughter | — | South Carolina |
| 2 | Willie Ed Mack | 3 | Son | — | South Carolina |
| 3 | Lucia Ann Mack | 1 | Daughter | — | South Carolina |
| 4 | Clay Mack | 20 | Head | Wage Hand | South Carolina |
| 5 | Annie Bell Mack | 17 | Wife | Wage Hand | South Carolina |
| 6 | Willie E Mack | 1 | Son | — | South Carolina |
| 7 | Jake Pinckney | 24 | Head | Laborer | South Carolina |
| 8 | Halleque Pinckney | 18 | Wife | Laborer | South Carolina |
| 9 | Rose Will Pinckney | 3 | Daughter | — | South Carolina |
| 10 | Jake Jr Pinckney | 0 | Son | — | South Carolina |
| 11 | David G Pinckney | 18 | Head | Day Laborer | South Carolina |
| 12 | Lucile Pinckney | 18 | Wife | Day Laborer | South Carolina |
| 13 | Helen Pinckney | 1 | Daughter | — | South Carolina |
| 14 | Matilda Taylor | 44 | Head | Farmeress | South Carolina |
| 15 | Jake Taylor | 27 | Son | Laborer | South Carolina |
| 16 | Clay Bell Taylor | 5 | Daughter | — | South Carolina |
| 17 | Manklyn Taylor | 3 | Daughter | — | South Carolina |
| 18 | Ernie Mae Haynes | 12 | Adopted Daughter | — | South Carolina |
| 19 | Bird Vaughn | 27 | Head | Farmer | South Carolina |
| 20 | Edith Vaughn | 24 | Wife | — | South Carolina |
| 21 | Clara Mae Vaughn | 8 | Daughter | — | South Carolina |
| 22 | Harry Vaughn | 6 | Son | — | South Carolina |
| 23 | Lucile Ann Vaughn | 1 | Daughter | — | South Carolina |
| 24 | Willie Robinson | 24 | Lodger | Wage Hand | South Carolina |
| 25 | Carpet Vaughn | 31 | Head | Wage Hand | South Carolina |
| 26 | Rebecca Vaughn | 30 | Wife | School Teacher | South Carolina |
| 27 | Otis Vaughn | 3 | Nephew | — | South Carolina |
| 28 | George Lee Vaughn | 0 | Nephew | — | South Carolina |
| 29 | Wilhelmena Moseley | 21 | Neice | Seamstress | South Carolina |
| 30 | John Jr Frederick THIS PERSON | 26 | Head | Wage Hand | South Carolina |
| 31 | Mary Frederick | 26 | Wife | — | South Carolina |
| 32 | John Jr Frederick | 7 | Son | — | South Carolina |
| 33 | Andie Mae Frederick | 6 | Daughter | — | South Carolina |
| 34 | Milton Frederick | 4 | Son | — | South Carolina |
| 35 | Hannah Frederick | 3 | Daughter | — | South Carolina |
| 36 | James Frederick | 0 | Son | — | South Carolina |
| 37 | Ruling Frederick | 21 | Head | Wage Hand | South Carolina |
| 38 | Jessie Mae Frederick | 19 | Wife | — | South Carolina |
| 39 | Jimmie Frederick | 1 | Son | — | South Carolina |
| 40 | Ruey Frederick | 48 | Head | — | South Carolina |
Related Census Records
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)