MK
Mary Knox — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Sumter, Alabama
Our Model Tree links this Mary Knox across the 1930 and 1940 US Censuses in Sumter, Alabama (XGBoost, ~Confirmed) — first a daughter (b.~1929), then head of a 8-person household.
Age 1
b. ~1929
Female
Daughter
Born: Alabama
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Sumter, Alabama |
| Surname | Knox |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Alabama |
| Father's Birthplace | Alabama |
| Mother's Birthplace | Alabama |
| Additional Details | |
| Birth State | Alabama |
| Birth Country | United States |
| Birthplace (normalized) | alabama |
| Township / Ward | Payneville Precinct 13 |
| Est. Birth Year | ~1929 |
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.
8 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Robert Knox | Son | — | 6 | ~1924 |
| Mary Knox | Daughter | — | 1 | ~1929 |
| Sam Knox | Son | — | 4 | ~1926 |
| Hattie Knox | Daughter | — | 9 | ~1921 |
| Emma Knox | Other | — | 28 | ~1902 |
| Caldonia Knox | Daughter | — | 2 | ~1928 |
| Will Knox | Head | — | 33 | ~1897 |
| Vilma Knox | Daughter | — | 11 | ~1919 |
Census Appearances
1930
Sumter, Alabama
Daughter, age 1
Sumter, Alabama · implied b. ~1929 — 8 household members
| Surname | Knox |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Alabama |
| Father's Birthplace | Alabama |
| Mother's Birthplace | Alabama |
| Birth State | Alabama |
| Birth Country | United States |
| Birthplace (normalized) | alabama |
1940
Sumter-County, Alabama
Daughter, age 11
Sumter-County, Alabama · implied b. ~1929 — 13 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Knox |
| Given Name | Mattie R. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Alabama |
| 1935 Residence (City) | Beat 13 |
| 1935 Residence (County) | Sumter |
| Highest Grade | No 3 |
| 1935 Residence | Same house |
| Birth State | Alabama |
| Birth Country | United States |
| Birthplace (normalized) | alabama |
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 Knox across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Knox
Daughter · 1930 · age 1 · b. ~1929 · Alabama
★ You are viewing this record
Sibling
Caldonia Knox
Sibling · 1930 · age 2
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Hattie Knox
Sibling · 1930 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Knox
Sibling · 1930 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Vilma Knox
Sibling · 1930 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Sam Knox
Sibling · 1930 · age 4
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
1930 US Federal Census — Sumter, Alabama
Open full size
1930 US Federal Census — Sumter, Alabama
Page Contents
50 people indexed on this census page (ia:1930:15thcensus49usce:0373)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Girley Webster | 7 | Niece | — | Alabama |
| 52 | John Amerson | 45 | Head | Farmer | Alabama |
| 53 | Sarah Amerson | 32 | Wife-H | — | Alabama |
| 54 | Choney Amerson | 15 | Daughter | — | Alabama |
| 55 | Mischelle Amerson | 10 | Son | — | Alabama |
| 56 | Rogers Dancy | 46 | Head | Farmer | Alabama |
| 57 | Nancy Dancy | 25 | Wife-H | — | Alabama |
| 58 | I Vet Dancy | 7 | Daughter | — | Alabama |
| 59 | John Dancy | 6 | Son | — | Alabama |
| 60 | Henry Dancy | 5 | Son | — | Alabama |
| 61 | Ruby Dancy | 3 | Daughter | — | Alabama |
| 62 | Will Frey | 45 | Head | Farmer | Alabama |
| 63 | Victoria Frey | 25 | Wife-H | — | Alabama |
| 64 | Will Frey | 2 | Son | — | Alabama |
| 65 | Carter Amerson | 48 | Head | Farmer | Alabama |
| 66 | Agusta Amerson | 35 | Wife-H | — | Alabama |
| 67 | Marshall Amerson | 11 | Son | — | Alabama |
| 68 | John Amerson | 8 | Son | — | Alabama |
| 69 | Tom Amerson | 7 | Son | — | Alabama |
| 70 | Will Knox | 33 | Head | Farmer | Alabama |
| 71 | Emma Knox | 28 | Wife-H | — | Alabama |
| 72 | Vilma Knox | 11 | Daughter | — | Alabama |
| 73 | Hattie Knox | 9 | Daughter | — | Alabama |
| 74 | Robert M Knox | 6 | Son | — | Alabama |
| 75 | Sam Knox | 4 | Son | — | Alabama |
| 76 | Caldonia Knox | 2 | Daughter | — | Alabama |
| 77 | Mary Knox THIS PERSON | 1 | Daughter | — | Alabama |
| 78 | Square Sims | 60 | Head | Farmer | Alabama |
| 79 | Annie Sims | 53 | Wife-H | — | Alabama |
| 80 | Frank Washington | 39 | Head | Farmer | Alabama |
| 81 | Valley Washington | 32 | Wife-H | — | Alabama |
| 82 | Lilly Washington | 6 | Daughter | — | Alabama |
| 83 | Tom Amerson | 48 | Head | Farmer | Alabama |
| 84 | Lindy Amerson | 45 | Wife-H | — | Alabama |
| 85 | Sonny Tartt | 70 | Head | Farmer | Alabama |
| 86 | Ida Tartt | 50 | Wife-H | — | Alabama |
| 87 | Sallie Sledge | 25 | Daughter | — | Alabama |
| 88 | Anna Johnson | 24 | Daughter | — | Alabama |
| 89 | Mag Moore | 10 | G. Daughter | — | Alabama |
| 90 | Nibster Sample | 59 | Head | Fireman | Alabama |
| 91 | Mary Lavender | 60 | Cousin-H | — | Alabama |
| 92 | Ethel Lavender | 10 | Cousin | — | Alabama |
| 93 | Robert Sledge | 40 | Head | Farmer | Alabama |
| 94 | Minnie Sledge | 29 | Wife-H | — | Alabama |
| 95 | Phoe Sledge | 9 | Son | — | Alabama |
| 96 | Willie Harrison | 58 | Head | Farmer | Alabama |
| 97 | Alice Harrison | 58 | Wife-H | — | Alabama |
| 98 | Isaiah Harrison | 30 | Son | Farm Laborer | Alabama |
| 99 | Newark Ruffin | 38 | Head | Farmer | Alabama |
| 100 | Will Haley | 56 | Head | Farmer | Alabama |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1930 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)