WM
William Mack — 1940 US Census Record
Model Tree available1940 United States Federal Census · Orangeburg-County, South Carolina
Our Model Tree links this William Mack across the 1920, 1930 and 1940 US Censuses in Orangeburg-County, South Carolina (XGBoost, ~Confirmed), with identified parents Isaih & James — first a son (b.~1917), then head of a 9-person household.
Age 23
b. ~1917
Male
Son
Born: South Carolina
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Orangeburg-County, South Carolina |
| Surname | Mack |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 23 |
| Marital Status | Single |
| Birthplace | South Carolina |
| 1935 Residence (City) | Holly Hill |
| 1935 Residence (County) | Orangeburg |
| Additional Details | |
| Occupation | Farm Laborer |
| Industry | Farm |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 66 |
| Highest Grade | No 3 |
| 1935 Residence | Same place |
| Birth State | South Carolina |
| Birth Country | United States |
| Birthplace (normalized) | south carolina |
| Occupation | Farm Laborer |
| Township / Ward | Holly Hill |
| Est. Birth Year | ~1917 |
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 William | Age | Birth yr |
|---|---|---|---|---|
| Vallie Mack | Daughter | — | 14 | ~1926 |
| Mary Mack | Daughter | — | 25 | ~1915 |
| Eva Mack | Daughter | — | 12 | ~1928 |
| Clarence Mack | Son | — | 7 | ~1933 |
| Willie Mack | Son | — | 21 | ~1919 |
| William Mack | Son | — | 23 | ~1917 |
| Georgiana White | Other | — | 70 | ~1870 |
| Maybelle Mack | Spouse | — | 48 | ~1892 |
| Isaih Mack | Head | — | 50 | ~1890 |
Census Appearances
1920
Orangeburg, South …
Son, age 5
Orangeburg, South Carolina · implied b. ~1915 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mack |
| Given Name | Willie |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 5 |
| 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 …
Son, age 14
Orangeburg, South Carolina · implied b. ~1916 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mack |
| Given Name | William |
| 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 |
| Birth State | South Carolina |
| Birth Country | United States |
| Birthplace (normalized) | south carolina |
1940
Orangeburg-County, South …
Son, age 23
Orangeburg-County, South Carolina · implied b. ~1917 — 9 household members
| Surname | Mack |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 23 |
| Marital Status | Single |
| Birthplace | South Carolina |
| 1935 Residence (City) | Holly Hill |
| 1935 Residence (County) | Orangeburg |
| Occupation | Farm Laborer |
| Industry | Farm |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 66 |
| Highest Grade | No 3 |
| 1935 Residence | Same place |
| 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 William Mack across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Isaih Mack (~0.92 confidence) and father James Mack (~0.92 confidence) and mother Frances Mack (~0.92 confidence) and mother Maybelle Mack (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Isaih Mack
b. ~1890
Source father
● Household
· direct · ~0.92
Father
James Mack
b. ~1892
Source father
● Household
· direct · ~0.92
Mother
Frances Mack
b. ~1895
Source mother
● Household
· direct · ~0.92
Mother
Maybelle Mack
b. ~1892
Source mother
● Household
· direct · ~0.92
This person
Anchor record
William Mack
Son · 1940 · age 23 · b. ~1917 · South Carolina
★ You are viewing this record
Sibling
Vallie Mack
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Willie Mack
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Clarence Mack
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Eva Mack
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Mack
Sibling · 1940 · age 25
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
40 people indexed on this census page (nara:1940:m-t0627-03830-00054)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Mark Williams | 3 | Son | — | South Carolina |
| 42 | Fred Williams | 1 | Son | — | South Carolina |
| 43 | Lawton Reese | 40 | Head | Farmer | South Carolina |
| 44 | Elsie Reese | 40 | Wife | — | South Carolina |
| 45 | Jessie Reese | 19 | Daughter | — | South Carolina |
| 46 | William Reese | 18 | Son | Farm Laborer | South Carolina |
| 47 | Leroy Reese | 17 | Son | Farm Laborer | South Carolina |
| 48 | Abbey Reese | 13 | Son | — | South Carolina |
| 49 | Hermine Reese | 12 | Daughter | — | South Carolina |
| 50 | Isaac Reese | 7 | Son | — | South Carolina |
| 51 | Jacob Reese | 7 | Son | — | South Carolina |
| 52 | Wilmer Reese | 6 | Son | — | South Carolina |
| 53 | James Young | 21 | Head | 68 | South Carolina |
| 54 | Josephine Young | 20 | Wife | — | South Carolina |
| 55 | Louis Young | 3 | Son | — | South Carolina |
| 56 | Irene Young | 2 | Daughter | — | South Carolina |
| 57 | Nathaniel Young | 1 | Son | — | South Carolina |
| 58 | Isaih Mack | 50 | Head | Carpenter | South Carolina |
| 59 | Maybelle Mack | 48 | Wife | — | South Carolina |
| 60 | Mary Lee Mack | 25 | Daughter | — | South Carolina |
| 61 | William Mack THIS PERSON | 23 | Son | Farm Laborer | South Carolina |
| 62 | Willie Mack | 21 | Son | Farm Laborer | South Carolina |
| 63 | Vallie Mack | 14 | Daughter | — | South Carolina |
| 64 | Eva Lee Mack | 12 | Daughter | — | South Carolina |
| 65 | Clarence Mack | 7 | Son | — | South Carolina |
| 66 | Georgiana White | 70 | Mother-in-law | — | South Carolina |
| 67 | Rosalee Lambright | 30 | Head | Farmer | South Carolina |
| 68 | Mark Lambright | 30 | Son | Farm Laborer | South Carolina |
| 69 | Amelia Lambright | 28 | Niece | — | South Carolina |
| 70 | Jeff Washington | 47 | Head | — | South Carolina |
| 71 | Maggie Washington | 53 | Wife | — | South Carolina |
| 72 | Hazel Washington | 13 | Son | — | South Carolina |
| 73 | Amy Washington | 12 | Daughter | — | South Carolina |
| 74 | Leonard Varner | 40 | Head | — | South Carolina |
| 75 | Lucile Varner | 31 | Wife | — | South Carolina |
| 76 | Lodie Margaret Varner | 18 | Daughter | — | South Carolina |
| 77 | Patty Varner | 8 | Daughter | — | South Carolina |
| 78 | Thomas Emmanuel | 52 | Head | Minister | South Carolina |
| 79 | Annabell Young Emmanuel | 39 | Wife | Farmer | South Carolina |
| 80 | Arthur Young | 21 | Stepson | Farm Laborer | South Carolina |
Pedigree Summary
William + 5 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)