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Mary Ballard — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Knox-County, Tennessee
Our Model Tree links this Mary Ballard across the 1930 and 1940 US Censuses in Knox-County, Tennessee (XGBoost, ~Confirmed) — first a daughter (b.~1923), then head of a 9-person household.
Age 17
b. ~1923
Female
Daughter
Born: Tennessee
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Knox-County, Tennessee |
| Surname | Ballard |
| Given Name | Mary M. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Tennessee |
| 1935 Residence (City) | Civil District 15 |
| 1935 Residence (County) | Knox |
| Additional Details | |
| Class of Worker | 0 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Tennessee |
| Birth Country | United States |
| Birthplace (normalized) | tennessee |
| Township / Ward | Civil District 15 |
| Est. Birth Year | ~1923 |
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 |
|---|---|---|---|---|
| Robert Ballard | Son | — | 3 | ~1937 |
| Floyd Ballard | Head | — | 50 | ~1890 |
| Chester Ballard | Son | — | 22 | ~1918 |
| Mary Ballard | Daughter | — | 17 | ~1923 |
| Billy Ballard | Son | — | 8 | ~1932 |
| Paul Ballard | Son | — | 14 | ~1926 |
| Ollie Ballard | Spouse | — | 42 | ~1898 |
| Thomas Ballard | Son | — | 12 | ~1928 |
| Dorothy Ballard | Daughter | — | 6 | ~1934 |
Census Appearances
1930
Knox, Tennessee
Daughter, age 8
Knox, Tennessee · implied b. ~1922 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Ballard |
| Given Name | Mary M. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 8 |
| Marital Status | Single |
| Birthplace | Tennessee |
| Father's Birthplace | Tennessee |
| Mother's Birthplace | Tennessee |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Tennessee |
| Birth Country | United States |
| Birthplace (normalized) | tennessee |
1940
Knox-County, Tennessee
Daughter, age 17
Knox-County, Tennessee · implied b. ~1923 — 9 household members
| Surname | Ballard |
| Given Name | Mary M. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Tennessee |
| 1935 Residence (City) | Civil District 15 |
| 1935 Residence (County) | Knox |
| Class of Worker | 0 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Tennessee |
| Birth Country | United States |
| Birthplace (normalized) | tennessee |
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 Ballard across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Ballard
Daughter · 1940 · age 17 · b. ~1923 · Tennessee
★ You are viewing this record
Sibling
Robert Ballard
Sibling · 1940 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Paul Ballard
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Billy Ballard
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Chester Ballard
Sibling · 1940 · age 22
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Dorothy Ballard
Sibling · 1940 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas Ballard
Sibling · 1940 · age 12
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 — Knox-County, Tennessee
Open full size
1940 US Federal Census — Knox-County, Tennessee
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03910-00814)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Dora Burchfield | 6 | Daughter | — | Tennessee |
| 42 | Ada Humbard | 26 | Maid | Maid | Tennessee |
| 43 | James H. Ward | 46 | Head | Farmer | Tennessee |
| 44 | Lena M. Ward | 47 | Wife | — | Tennessee |
| 45 | Charles J. Ward | 21 | Son | — | Tennessee |
| 46 | Ralph Dyer | 21 | Head | Shipping Clerk | Tennessee |
| 47 | Patsy L. Dyer | 19 | Wife | Beauty Culturist | Tennessee |
| 48 | Thomas J. Ahorn|Aborn | 65 | Head | Farmer | Tennessee |
| 49 | Georgia Ahorn|Aborn | 42 | Wife | — | Tennessee |
| 50 | Floyd J. Ballard | 50 | Head | Farmer | Tennessee |
| 51 | Ollie Ballard | 42 | Wife | — | Tennessee |
| 52 | Chester Ballard | 22 | Son | — | Tennessee |
| 53 | Mary M. Ballard THIS PERSON | 17 | Daughter | — | Tennessee |
| 54 | Paul R. Ballard | 14 | Son | — | Tennessee |
| 55 | Thomas Ballard | 12 | Son | — | Tennessee |
| 56 | Billy R. Ballard | 8 | Son | — | Tennessee |
| 57 | Dorothy L. Ballard | 6 | Daughter | — | Tennessee |
| 58 | Robert L. Ballard | 3 | Son | — | Tennessee |
| 59 | Roy M. Blackwell | 46 | Head | Attendant | Tennessee |
| 60 | Vera S. Blackwell | 38 | Wife | — | Tennessee |
| 61 | Jeanne P. Blackwell | 17 | Daughter | — | Tennessee |
| 62 | Dorothy J. Blackwell | 13 | Daughter | — | Tennessee |
| 63 | Glenda S. Blackwell | 11 | Daughter | — | Tennessee |
| 64 | Boyd W. Blackwell | 2 | Son | — | Texas |
| 65 | William P. Reneau | 52 | Head | Laborer | Tennessee |
| 66 | Daisy O. Reneau | 46 | Wife | — | Tennessee |
| 67 | Herbert Reneau | 16 | Son | Delivery Boy | Tennessee |
| 68 | Clay E. Hutchens | 29 | Head | Teamster | Tennessee |
| 69 | Rosalie P. Hutchens | 23 | Wife | — | Tennessee |
| 70 | Clay E. Jr. Hutchens | 3 | Son | — | Tennessee |
| 71 | Thomas T. Ballard | 39 | Head | Truck Driver | Tennessee |
| 72 | Bessie Ballard | 37 | Wife | Inspector | Tennessee |
| 73 | Wayne Ballard | 8 | Son | — | Tennessee |
| 74 | John E. Blake | 40 | Head | Farmer | Tennessee |
| 75 | Daisy C. Blake | 41 | Wife | Saleslady | Tennessee |
| 76 | John E. Jr. Blake | 20 | Son | — | Tennessee |
| 77 | John Ed. Blake | 18 | Son | — | Tennessee |
| 78 | Cleland Blake | 9 | Son | — | Tennessee |
| 79 | Lyndell Blake | 6 | Son | — | Tennessee |
| 80 | Mary French | 62 | Mother-in-law | — | Tennessee |
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)