MD
Mary Dean — 1940 US Census Record
Model Tree available1940 United States Federal Census · Laurens-County, South Carolina
Our Model Tree links this Mary Dean across the 1920, 1930 and 1940 US Censuses in Laurens-County, South Carolina (XGBoost, ~Confirmed), with identified parents William & Jake — first a daughter (b.~1919), then head of a 9-person household.
Age 21
b. ~1919
Female
Daughter
Born: South Carolina
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Laurens-County, South Carolina |
| Surname | Dean |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 21 |
| Marital Status | Single |
| Birthplace | South Carolina |
| 1935 Residence (City) | Laurens |
| 1935 Residence (County) | Laurens |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | No 7 |
| 1935 Residence | South Carolina |
| Birth State | South Carolina |
| Birth Country | United States |
| Birthplace (normalized) | south carolina |
| Township / Ward | Laurens |
| Est. Birth Year | ~1919 |
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 Dean | Daughter | — | 21 | ~1919 |
| Mamie Dean | Daughter | — | 13 | ~1927 |
| John Dean | Head | — | 50 | ~1890 |
| Joseph Dean | Son | — | 2 | ~1938 |
| James Dean | Son | — | 10 | ~1930 |
| Daniel Dean | Son | — | 19 | ~1921 |
| Guy Dean | Son | — | 15 | ~1925 |
| William Dean | Son | — | 15 | ~1925 |
| Vella Dean | Spouse | — | 40 | ~1900 |
Census Appearances
1920
Laurens, South …
Daughter, age 1
Laurens, South Carolina · implied b. ~1919 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Dean |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 1 |
| 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
Laurens, South …
Daughter, age 11
Laurens, South Carolina · implied b. ~1919 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Dean |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 11 |
| Marital Status | Single |
| Birthplace | South Carolina |
| Father's Birthplace | South Carolina |
| Mother's Birthplace | South Carolina |
| Occupation | Laborer |
| Industry | Gen Farm |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | South Carolina |
| Birth Country | United States |
| Birthplace (normalized) | south carolina |
1940
Laurens-County, South …
Daughter, age 21
Laurens-County, South Carolina · implied b. ~1919 — 9 household members
| Surname | Dean |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 21 |
| Marital Status | Single |
| Birthplace | South Carolina |
| 1935 Residence (City) | Laurens |
| 1935 Residence (County) | Laurens |
| Income (1939) | 0 |
| Highest Grade | No 7 |
| 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 Dean across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father William Dean (~0.84 confidence) and father Jake Dean (~0.84 confidence) and mother Lula Dean (~0.84 confidence) and mother Alice Dean (~0.84 confidence) and father John Dean (~0.92 confidence) and father John Dean (~0.92 confidence) and mother Ella Dean (~0.92 confidence) and mother Vella Dean (~0.92 confidence) and father John Dean (~0.92 confidence) and mother Ella Dean (~0.60 confidence). The pedigree spans 2 generations with 10 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.86
Father
William Dean
b. ~1852
Source father>father
● Household
· direct · ~0.84
Father
Jake Dean
b. ~1861
Source father>father
● Household
· direct · ~0.84
Mother
Lula Dean
b. ~1861
Source father>mother
● Household
· direct · ~0.84
Mother
Alice Dean
b. ~1869
Source father>mother
● Household
· direct · ~0.84
Father
John Dean
b. ~1890
Source father
● Household
· direct · ~0.92
Father
John Dean
b. ~1895
Source father
● Household
· direct · ~0.92
Mother
Ella Dean
b. ~1900
Source mother
● Household
· direct · ~0.92
Mother
Vella Dean
b. ~1900
Source mother
● Household
· direct · ~0.92
Father
John Dean
b. ~1903
Source father
● Household
· direct · ~0.92
Mother
Ella Dean
b. ~1910
Source mother
● Household
· direct · ~0.6
This person
Anchor record
Mary Dean
Daughter · 1940 · age 21 · b. ~1919 · South Carolina
★ You are viewing this record
Sibling
Joseph Dean
Sibling · 1940 · age 2
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Dean
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mamie Dean
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Dean
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Guy Dean
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Daniel Dean
Sibling · 1940 · age 19
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 — Laurens-County, South Carolina
Open full size
1940 US Federal Census — Laurens-County, South Carolina
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03821-00930)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Erlie Ott | 21 | Wife | — | South Carolina |
| 42 | Shirley Ott | 2 | Daughter | — | South Carolina |
| 43 | John Dean | 50 | Head | — | South Carolina |
| 44 | Vella Dean | 40 | Wife | Laundress | South Carolina |
| 45 | Mary Dean THIS PERSON | 21 | Daughter | — | South Carolina |
| 46 | Daniel Dean | 19 | Son | Laborer | South Carolina |
| 47 | Guy Dean | 15 | Son | Shoe Shiner | South Carolina |
| 48 | William Dean | 15 | Son | — | South Carolina |
| 49 | Mamie Lee Dean | 13 | Daughter | — | South Carolina |
| 50 | James Dean | 10 | Son | — | South Carolina |
| 51 | Joseph Dean | 2 | Son | — | South Carolina |
| 52 | Tom Rinson | 27 | Head | Laborer | South Carolina |
| 53 | Daisy Rinson | 34 | Wife | — | South Carolina |
| 54 | Lucile Rinson | 9 | Daughter | — | South Carolina |
| 55 | J. D. Rinson | 6 | Son | — | South Carolina |
| 56 | Josie Mae Rinson | 3 | Daughter | — | South Carolina |
| 57 | Dorothy Ruth Rinson | 2 | Daughter | — | South Carolina |
| 58 | Willie B. Rinson | 12 | Son | — | South Carolina |
| 59 | Ola Mae Sloan | 40 | Head | Sew | South Carolina |
| 60 | Norris Margie Mae Sloan | 17 | Daughter | — | North Carolina |
| 61 | Josh Ferguson | 65 | Head | — | South Carolina |
| 62 | Beulah Ferguson | 64 | Wife | — | South Carolina |
| 63 | Dollie V. Ferguson | 20 | Daughter | — | South Carolina |
| 64 | Willie James Ferguson | 13 | Son | — | South Carolina |
| 65 | Clara Belle Ferguson | 1 | Granddaughter | — | South Carolina |
| 66 | Sam C. Powers | 53 | Head | Farmer | South Carolina |
| 67 | Alpha Powers | 51 | Wife | — | South Carolina |
| 68 | Elma Powers | 25 | Daughter | Stenographer | South Carolina |
| 69 | Lois Powers | 18 | Daughter | — | South Carolina |
| 70 | Sam Jr. Powers | 12 | Son | — | South Carolina |
| 71 | Willie Irby | 23 | Head | Farm Laborer | South Carolina |
| 72 | Rosalee Irby | 21 | Wife | — | South Carolina |
| 73 | George Irby | 11 | Son | — | South Carolina |
| 74 | Willie Jr. Irby | 10 | Son | — | South Carolina |
| 75 | Lula Mae Irby | 6 | Daughter | — | South Carolina |
| 76 | Arthur Irby | 23 | Brother | Farm Laborer | South Carolina |
| 77 | Mark Ott | 51 | Head | — | South Carolina |
| 78 | Annie Ott | 49 | Wife | — | South Carolina |
| 79 | Carradyne Ott | 22 | Son | Knitter | South Carolina |
| 80 | Furman Ott | 18 | Son | Knitter | South Carolina |
Related Census Records
Pedigree Summary
Mary + 6 siblings
Gen 1 · 6 parents
~0.87
Gen 2 · 4 grandparents
~0.84
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)