JM
James Mack — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Sumter-County, South Carolina
Our Model Tree links this James Mack across the 1930 and 1940 US Censuses in Sumter-County, South Carolina (XGBoost, ~Confirmed) — first a son (b.~1928), then head of a 7-person household.
Age 12
b. ~1928
Male
Son
Born: South Carolina
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Sumter-County, South Carolina |
| Surname | Mack |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 12 |
| Marital Status | Single |
| Birthplace | South Carolina |
| 1935 Residence (County) | Sumter |
| Additional Details | |
| Highest Grade | No 2 |
| Birth State | South Carolina |
| Birth Country | United States |
| Birthplace (normalized) | south carolina |
| Township / Ward | Middleton |
| Est. Birth Year | ~1928 |
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 James | Age | Birth yr |
|---|---|---|---|---|
| Mary Mack | Daughter | — | 5 | ~1935 |
| Junius Mack | Son | — | 6 | ~1934 |
| Sidney Mack | Son | — | 10 | ~1930 |
| Herbert Mack | Son | — | 13 | ~1927 |
| Rosebud Mack | Daughter | — | 1 | ~1939 |
| James Mack | Son | — | 12 | ~1928 |
| Bessie Mack | Head | — | 39 | ~1901 |
Census Appearances
1930
Sumter, South …
Son, age 1
Sumter, South Carolina · implied b. ~1929 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mack |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| 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 |
1940
Sumter-County, South …
Son, age 12
Sumter-County, South Carolina · implied b. ~1928 — 7 household members
| Surname | Mack |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 12 |
| Marital Status | Single |
| Birthplace | South Carolina |
| 1935 Residence (County) | Sumter |
| Highest Grade | No 2 |
| 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 James Mack across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
James Mack
Son · 1940 · age 12 · b. ~1928 · South Carolina
★ You are viewing this record
Sibling
Herbert Mack
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Sidney Mack
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Mack
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Junius Mack
Sibling · 1940 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Rosebud Mack
Sibling · 1940 · age 1
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 — Sumter-County, South Carolina
Open full size
1940 US Federal Census — Sumter-County, South Carolina
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03841-00259)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Isadore Anderson | 2 | Grandson | — | South Carolina |
| 42 | Oloweld | Olowell Anderson | 12 | Grandson | — | South Carolina |
| 43 | Jones Hariet Anderson | 7 | Granddaughter | — | South Carolina |
| 44 | Smith Walter Anderson | 1 | Son | — | South Carolina |
| 45 | Andrew Pringle | 26 | Head | Farm Laborer | South Carolina |
| 46 | Ethel Pringle | 23 | Wife | — | South Carolina |
| 47 | Andrew Pringle | 3 | Son | — | South Carolina |
| 48 | Luke Pringle | 1 | Son | — | South Carolina |
| 49 | Bessie Mack | 39 | Head | Farm Laborer | South Carolina |
| 50 | Herbert Mack | 13 | Son | — | South Carolina |
| 51 | James Mack THIS PERSON | 12 | Son | — | South Carolina |
| 52 | Sidney Mack | 10 | Son | — | South Carolina |
| 53 | Junius Mack | 6 | Son | — | South Carolina |
| 54 | Mary Mack | 5 | Daughter | — | South Carolina |
| 55 | Rosebud Mack | 1 | Daughter | — | South Carolina |
| 56 | Isadore Nathaniel | 34 | Head | Farmer | South Carolina |
| 57 | Beatrice Nathaniel | 34 | Wife | — | South Carolina |
| 58 | Charles Nathaniel | 16 | Son | — | South Carolina |
| 59 | Isadore Nathaniel | 14 | Son | — | South Carolina |
| 60 | Samuel Nathaniel | 11 | Son | — | South Carolina |
| 61 | Junie Nathaniel | 8 | Son | — | South Carolina |
| 62 | Elizabeth Nathaniel | 2 | Daughter | — | South Carolina |
| 63 | Paul Murray | 53 | Head | Farmer | South Carolina |
| 64 | Sarah Murray | 41 | Wife | — | South Carolina |
| 65 | Samuel Murray | 30 | Son | Farm Laborer | South Carolina |
| 66 | Samuel Murray | 12 | Grandson | — | South Carolina |
| 67 | Paul Murray | 11 | Grandson | — | South Carolina |
| 68 | Isaac Duffy | 76 | Head | Farmer | South Carolina |
| 69 | Betty Duffy | 67 | Wife | — | South Carolina |
| 70 | Gippie Duffy | 29 | Son | Farm Laborer | South Carolina |
| 71 | Carrie Duffy | 19 | Daughter in law | — | South Carolina |
| 72 | James Bethune | 48 | Head | Farm Laborer | South Carolina |
| 73 | Silvia Bethune | 41 | Wife | — | South Carolina |
| 74 | Daniel Bethune | 20 | Son | Farm Laborer | South Carolina |
| 75 | Sam Bradley | 49 | Head | Farmer | South Carolina |
| 76 | Rebecca Bradley | 44 | Wife | — | South Carolina |
| 77 | Katie Bradley | 17 | Daughter | — | South Carolina |
| 78 | Paul Bradley | 15 | Son | — | South Carolina |
| 79 | Joseph Bradley | 12 | Son | — | South Carolina |
| 80 | Samuel Bradley | 1 | Grandson | — | 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)