WM
William Mack — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Charleston-County, South Carolina
Our Model Tree links this William Mack across the 1930 and 1940 US Censuses in Charleston-County, South Carolina (XGBoost, ~Confirmed) — first a head (b.~1898), then head of a 11-person household.
Age 42
b. ~1898
Male
Head
Born: South Carolina
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Charleston-County, South Carolina |
| Surname | Mack |
| Given Name | William |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | Black |
| Age | 42 |
| Marital Status | Married |
| Birthplace | South Carolina |
| 1935 Residence (City) | Charleston City |
| 1935 Residence (County) | Charleston |
| Additional Details | |
| Occupation | Baker |
| Industry | Bakery |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 300 |
| Highest Grade | No 4 |
| 1935 Residence | Same place |
| Birth State | South Carolina |
| Birth Country | United States |
| Birthplace (normalized) | south carolina |
| Occupation | Baker |
| Township / Ward | Charleston City |
| Est. Birth Year | ~1898 |
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.
11 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| Elmo Mack | Son | — | 21 | ~1919 |
| Charles Mack | Son | — | 8 | ~1932 |
| Beatrice Mack | Spouse | — | 42 | ~1898 |
| Juliette Mack | Daughter | — | 15 | ~1925 |
| Herbert Mack | Son | — | 11 | ~1929 |
| Pearl Mack | Daughter | — | 13 | ~1927 |
| William Mack | Head | — | 42 | ~1898 |
| Sydney Mack | Son | — | 1 | ~1939 |
| Gerald Mack | Son | — | 3 | ~1937 |
| Junious Mack | Daughter | — | 6 | ~1934 |
| Etta Mack | Daughter | — | 9 | ~1931 |
Census Appearances
1930
Charleston, South …
Head, age 32
Charleston, South Carolina · implied b. ~1898 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mack |
| Given Name | William |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | Black |
| Age | 32 |
| Marital Status | Married |
| Birthplace | South Carolina |
| Age at First Marriage | 18 |
| Father's Birthplace | South Carolina |
| Mother's Birthplace | South Carolina |
| Occupation | Baker |
| Industry | Bakery |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 15.00 |
| Birth State | South Carolina |
| Birth Country | United States |
| Birthplace (normalized) | south carolina |
1940
Charleston-County, South …
Head, age 42
Charleston-County, South Carolina · implied b. ~1898 — 11 household members
| Surname | Mack |
| Given Name | William |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | Black |
| Age | 42 |
| Marital Status | Married |
| Birthplace | South Carolina |
| 1935 Residence (City) | Charleston City |
| 1935 Residence (County) | Charleston |
| Occupation | Baker |
| Industry | Bakery |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 300 |
| Highest Grade | No 4 |
| 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 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
William Mack
Head · 1940 · age 42 · b. ~1898 · 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 — Charleston-County, South Carolina
Open full size
1940 US Federal Census — Charleston-County, South Carolina
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03794-01020)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Gardena Bell | 40 | Head | Washer | South Carolina |
| 2 | Luke Bell | 19 | Son | Helper | South Carolina |
| 3 | Cassitta Bell | 17 | Daughter | — | South Carolina |
| 4 | Caroline Bell | 4 | Daughter | — | South Carolina |
| 5 | Theodosia Bell | 2 | Granddaughter | — | South Carolina |
| 6 | Virginia Singleton | 25 | Head | Cook | South Carolina |
| 7 | Taft Jr. Singleton | 10 | Son | — | South Carolina |
| 8 | William Singleton | 8 | Son | — | South Carolina |
| 9 | Eugene Singleton | 6 | Son | — | South Carolina |
| 10 | James Corvana | 29 | Head | Baker | South Carolina |
| 11 | Sarah Corvana | 27 | Wife | Teacher | South Carolina |
| 12 | Lillie Davis | 32 | Boarder | Cook | D.C. |
| 13 | John Garrett | 31 | Head | Laborer | South Carolina |
| 14 | Mable Garrett | 32 | Wife | Washer | South Carolina |
| 15 | Sarah Garrett | 18 | Daughter | — | South Carolina |
| 16 | Hazel Garrett | 5 | Daughter | — | South Carolina |
| 17 | John Holmes | 37 | Head | Carpenter | South Carolina |
| 18 | Anna Bell Holmes | 35 | Wife | Cook | South Carolina |
| 19 | Henry Brown | 33 | Head | Truck Driver | South Carolina |
| 20 | Elizabeth Brown | 32 | Wife | Laundress | South Carolina |
| 21 | Jim Bradham | 33 | Nephew | Helper | South Carolina |
| 22 | Lumialer Bradham | 25 | Wife | Child'S Nurse | South Carolina |
| 23 | Edna Grimes | 22 | Niece | Child'S Nurse | South Carolina |
| 24 | Mary Lee Grimes | 4 | Daughter | — | South Carolina |
| 25 | Lucrita Grimes | 2 | Daughter | — | South Carolina |
| 26 | William Mack THIS PERSON | 42 | Head | Baker | South Carolina |
| 27 | Beatrice Mack | 42 | Wife | — | North Carolina |
| 28 | Elmo Mack | 21 | Son | New Worker | South Carolina |
| 29 | Juliette Mack | 15 | Daughter | — | South Carolina |
| 30 | Pearl Mack | 13 | Daughter | — | South Carolina |
| 31 | Herbert Mack | 11 | Son | — | South Carolina |
| 32 | Etta Mack | 9 | Daughter | — | South Carolina |
| 33 | Charles Mack | 8 | Son | — | South Carolina |
| 34 | Junious Mack | 6 | Daughter | — | South Carolina |
| 35 | Gerald Mack | 3 | Son | — | South Carolina |
| 36 | Sydney Mack | 1 | Son | — | South Carolina |
| 37 | Eugene Hardy | 39 | Head | Store Keeper | South Carolina |
| 38 | July Brown | 60 | Head | — | South Carolina |
| 39 | Etta Brown | 50 | Wife | Laundress | South Carolina |
| 40 | Henrietta Parker | 42 | Cousin | — | South Carolina |
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)