MJ
Mary Johnson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Orangeburg-County, South Carolina
Our Model Tree links this Mary Johnson across the 1920, 1930 and 1940 US Censuses in Orangeburg-County, South Carolina (XGBoost, ~Confirmed), with identified parents Jeff & Effie — first a daughter (b.~1915), then head of a 9-person household.
Age 25
b. ~1915
Female
Daughter
Born: South Carolina
Widowed
1940 Census Record Details
| Census Year | 1940 |
| Location | Orangeburg-County, South Carolina |
| Surname | Johnson |
| Given Name | Mary L. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 25 |
| Marital Status | Widowed |
| Birthplace | South Carolina |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Orangeburg |
| Additional Details | |
| Occupation | Farm laborer |
| Industry | Farm |
| Class of Worker | PW |
| Hours Worked | 20 |
| Income (1939) | 17 |
| Highest Grade | Hs 2 |
| 1935 Residence | South Carolina |
| Birth State | South Carolina |
| Birth Country | United States |
| Birthplace (normalized) | south carolina |
| Occupation | Farm Laborer |
| Township / Ward | Cow Castle Township |
| Est. Birth Year | ~1915 |
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.
9 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Johnson | Daughter | — | 25 | ~1915 |
| Jeff Cokley | Head | — | 57 | ~1883 |
| Leroy Johnson | Other | — | ~1940 | |
| Charlie Johnson | Other | — | 8 | ~1932 |
| Edward Johnson | Other | — | 4 | ~1936 |
| Lucille Johnson | Other | — | 3 | ~1937 |
| Hamp Cokley | Son | — | 20 | ~1920 |
| Earl Cokley | Son | — | 32 | ~1908 |
| Effie Cokley | Spouse | — | 43 | ~1897 |
Census Appearances
1920
Orangeburg, South …
Other, age 4
Orangeburg, South Carolina · implied b. ~1916 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Mary L |
| Relationship to Head | Sister |
| Sex | F |
| Color / Race | Black |
| Age | 4 |
| Marital Status | Single |
| Birthplace | South Carolina |
| Father's Birthplace | South Carolina |
| Mother's Birthplace | South Carolina |
| Birth State | South Carolina |
| Birth Country | United States |
| Birthplace (normalized) | south carolina |
1930
Orangeburg, South …
Daughter, age 13
Orangeburg, South Carolina · implied b. ~1917 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Mary L. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 13 |
| Marital Status | Single |
| Birthplace | South Carolina |
| Father's Birthplace | South Carolina |
| Mother's Birthplace | South Carolina |
| Occupation | Farm laborer |
| Industry | General farm |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | South Carolina |
| Birth Country | United States |
| Birthplace (normalized) | south carolina |
1940
Orangeburg-County, South …
Daughter, age 25
Orangeburg-County, South Carolina · implied b. ~1915 — 9 household members
| Surname | Johnson |
| Given Name | Mary L. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 25 |
| Marital Status | Widowed |
| Birthplace | South Carolina |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Orangeburg |
| Occupation | Farm laborer |
| Industry | Farm |
| Class of Worker | PW |
| Hours Worked | 20 |
| Income (1939) | 17 |
| Highest Grade | Hs 2 |
| 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 Mary Johnson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Jeff Cokley (~0.92 confidence) and mother Effie Cokley (~0.92 confidence) and father Charlie Johnson (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Jeff Cokley
b. ~1883
Source father
● Household
· direct · ~0.92
Mother
Effie Cokley
b. ~1897
Source mother
● Household
· direct · ~0.92
Father
Charlie Johnson
b. ~1880
Source father
● Household
· direct · ~0.92
This person
Anchor record
Mary Johnson
Daughter · 1940 · age 25 · b. ~1915 · South Carolina
★ You are viewing this record
Sibling
Hamp Cokley
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Earl Cokley
Sibling · 1940 · age 32
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 — Orangeburg-County, South Carolina
Open full size
1940 US Federal Census — Orangeburg-County, South Carolina
Page Contents
38 people indexed on this census page (nara:1940:m-t0627-03829-00445)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Lizzie B. Gramine | 10 | Daughter | — | South Carolina |
| 2 | Willie Gramine | 8 | Son | — | South Carolina |
| 3 | Jas. L. Gramine | 5 | Son | — | South Carolina |
| 4 | Jimmy V. Gidney | 40 | Head | Farmer | South Carolina |
| 5 | Leila Gidney | 35 | Wife | — | South Carolina |
| 6 | Rosalie Gidney | 17 | Daughter | — | South Carolina |
| 7 | Jimmy V. Jr. Gidney | 14 | Son | — | South Carolina |
| 8 | Alvin Gidney | 12 | Son | — | South Carolina |
| 9 | Annabelle Gidney | 9 | Daughter | — | South Carolina |
| 10 | Ruth Gidney | 5 | Daughter | — | South Carolina |
| 11 | Ralph Gidney | 3 | Son | — | South Carolina |
| 12 | Vera M. Gidney | 0 | Daughter | — | South Carolina |
| 13 | Oasis S. Summers | 53 | Head | Farmer | South Carolina |
| 14 | Maggie Summers | 49 | Wife | Farm Laborer | South Carolina |
| 15 | Lutie C. Summers | 11 | Daughter | — | South Carolina |
| 16 | Dorothy Summers | 10 | Daughter | — | South Carolina |
| 17 | John Q. Summers | 7 | Son | — | South Carolina |
| 19 | Ida Miller | 51 | Head | Farmer | South Carolina |
| 20 | Fanny Miller | 20 | Daughter | Farm Laborer | South Carolina |
| 21 | Eugene Miller | 15 | Son | Farm Laborer | South Carolina |
| 22 | Jeff Cokley | 57 | Head | Farmer | South Carolina |
| 23 | Effie Cokley | 43 | Wife | Farm Laborer | South Carolina |
| 24 | Earl Cokley | 32 | Son | Farm Laborer | South Carolina |
| 25 | Hamp Cokley | 20 | Son | Farm Laborer | South Carolina |
| 26 | Mary L. Johnson THIS PERSON | 25 | Daughter | Farm Laborer | South Carolina |
| 27 | Charlie M. Johnson | 8 | Grandson | — | South Carolina |
| 28 | Edward Johnson | 4 | Grandson | — | South Carolina |
| 29 | Lucille Johnson | 3 | Granddaughter | — | South Carolina |
| 30 | Leroy Johnson | 0 | Grandson | — | South Carolina |
| 32 | Linus Moorer | 27 | Head | Farm Laborer | South Carolina |
| 33 | Eva Moorer | 24 | Wife | — | South Carolina |
| 34 | Louise Moorer | 3 | Daughter | — | South Carolina |
| 35 | Daniel Moorer | 15 | Half brother | — | South Carolina |
| 36 | Allan Moorer | 13 | Half brother | — | South Carolina |
| 37 | Jacob M. Smith | 55 | Head | Farmer | South Carolina |
| 38 | Allene B. Smith | 53 | Wife | — | South Carolina |
| 39 | Geneva Smith | 21 | Daughter | — | South Carolina |
| 40 | Moses Smith | 19 | Son | — | South Carolina |
Pedigree Summary
Mary + 2 siblings
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)