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Mary Knox — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Mecklenburg-County, North Carolina
Our Model Tree links this Mary Knox across the 1930 and 1940 US Censuses in Mecklenburg-County, North Carolina (XGBoost, ~Confirmed) — first a daughter (b.~1927), then head of a 9-person household.
Age 13
b. ~1927
Female
Daughter
Born: North Carolina
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Mecklenburg-County, North Carolina |
| Surname | Knox |
| Given Name | Mary E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | North Carolina |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Mecklenburg |
| Additional Details | |
| Highest Grade | No 7 |
| 1935 Residence | North Carolina |
| Birth State | North Carolina |
| Birth Country | United States |
| Birthplace (normalized) | north carolina |
| Township / Ward | Steele Creek Townships |
| Est. Birth Year | ~1927 |
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 |
|---|---|---|---|---|
| Susan Knox | Daughter | — | 4 | ~1936 |
| Mary Knox | Daughter | — | 13 | ~1927 |
| Elizabeth Knox | Spouse | — | 39 | ~1901 |
| Charles Knox | Head | — | 45 | ~1895 |
| Charles Knox | Son | — | 11 | ~1929 |
| Sarah Knox | Daughter | — | 2 | ~1938 |
| Anne Knox | Daughter | — | 7 | ~1933 |
| Martha Knox | Daughter | — | 9 | ~1931 |
| Robert Knox | Son | — | 6 | ~1934 |
Census Appearances
1930
Cabarrus, North …
Daughter, age 3
Cabarrus, North Carolina · implied b. ~1927 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Knox |
| Given Name | Mary L. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 3 |
| Marital Status | Single |
| Birthplace | North Carolina |
| Father's Birthplace | North Carolina |
| Mother's Birthplace | North Carolina |
| Birth State | North Carolina |
| Birth Country | United States |
| Birthplace (normalized) | north carolina |
1940
Mecklenburg-County, North …
Daughter, age 13
Mecklenburg-County, North Carolina · implied b. ~1927 — 9 household members
| Surname | Knox |
| Given Name | Mary E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | North Carolina |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Mecklenburg |
| Highest Grade | No 7 |
| 1935 Residence | North Carolina |
| Birth State | North Carolina |
| Birth Country | United States |
| Birthplace (normalized) | north 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 Knox across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Knox
Daughter · 1940 · age 13 · b. ~1927 · North Carolina
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Sibling
Robert Knox
Sibling · 1940 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Anne Knox
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Martha Knox
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Sarah Knox
Sibling · 1940 · age 2
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Susan Knox
Sibling · 1940 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Charles Knox
Sibling · 1940 · age 11
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 — Mecklenburg-County, North Carolina
Open full size
1940 US Federal Census — Mecklenburg-County, North Carolina
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02944-00480)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Minnie Cora | 49 | Head | — | North Carolina |
| 42 | Cynthia M Smith | 19 | Niece | — | North Carolina |
| 43 | Ida Lee Smith | 12 | Niece | — | North Carolina |
| 44 | Lloyd Earnhardt | 44 | Head | Machinist | North Carolina |
| 45 | Lulu Lee Earnhardt | 32 | Wife | — | South Carolina |
| 46 | Boyce Earnhardt | 14 | Son | — | North Carolina |
| 47 | Marian Earnhardt | 11 | Daughter | — | North Carolina |
| 48 | Bertie L. Earnhardt | 10 | Daughter | — | North Carolina |
| 49 | Luther Wallace | 26 | Servant | Farm Laborer | South Carolina |
| 50 | Hartland Graham | 51 | Head | — | Georgia |
| 51 | Ennis Graham | 56 | Brother | — | Georgia |
| 52 | Malcolm Graham | 47 | Brother | — | Georgia |
| 53 | Julia A. Graham | 44 | Sister | Kindergarten Teacher | Georgia |
| 54 | Mollie Freeman | 60 | Head | — | North Carolina |
| 55 | Johnsie Alexander | 52 | In law | — | North Carolina |
| 56 | Ernest Alexander | 23 | Nephew | Cleaning & Check | North Carolina |
| 57 | Charles B. Knox | 45 | Head | Night Watchman | North Carolina |
| 58 | Elizabeth Knox | 39 | Wife | — | North Carolina |
| 59 | Mary E. Knox THIS PERSON | 13 | Daughter | — | North Carolina |
| 60 | Charles P. Knox | 11 | Son | — | North Carolina |
| 61 | Martha N. Knox | 9 | Daughter | — | North Carolina |
| 62 | Anne E. Knox | 7 | Daughter | — | North Carolina |
| 63 | Robert A. Knox | 6 | Son | — | North Carolina |
| 64 | Susan C. Knox | 4 | Daughter | — | North Carolina |
| 65 | Sarah M. Knox | 2 | Daughter | — | North Carolina |
| 66 | W. Trotter James | 47 | Head | — | North Carolina |
| 67 | John Hewlett | 38 | Servant | Farm Laborer | North Carolina |
| 68 | John Byrum | 29 | Head | Farm Laborer | North Carolina |
| 69 | Annie Byrum | 28 | Wife | — | North Carolina |
| 70 | Billy Byrum | 8 | Son | — | North Carolina |
| 71 | Donald Byrum | 5 | Son | — | North Carolina |
| 72 | Jimmy Byrum | 3 | Son | — | North Carolina |
| 73 | Barbara Byrum | 0 | Daughter | — | North Carolina |
| 74 | John Queene | 45 | Head | Operater | North Carolina |
| 75 | Laura Queene | 37 | Wife | Spinner | North Carolina |
| 76 | Leroy Queene | 17 | Son | — | North Carolina |
| 77 | Pearly Queene | 16 | Daughter | — | North Carolina |
| 78 | Johnny Queene | 15 | Son | — | North Carolina |
| 79 | Clide Queene | 9 | Son | — | North Carolina |
| 80 | Douglas Queene | 7 | Son | — | North 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)