MD
Mary Davidson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Clay-County, Kentucky
Our Model Tree links this Mary Davidson across the 1930 and 1940 US Censuses in Clay-County, Kentucky (XGBoost, ~Confirmed) — first a daughter (b.~1927), then head of a 8-person household.
Age 13
b. ~1927
Female
Daughter
Born: Kentucky
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Clay-County, Kentucky |
| Surname | Davidson |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Kentucky |
| 1935 Residence (City) | Mag District #3 |
| 1935 Residence (County) | Clay |
| Additional Details | |
| Highest Grade | No 4 |
| 1935 Residence | Same place |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
| Township / Ward | Mag District 3 |
| 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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Sylvenia Davidson | Daughter | — | 15 | ~1925 |
| Rosalie Davidson | Daughter | — | 10 | ~1930 |
| Delphia Davidson | Daughter | — | 4 | ~1936 |
| Mary Davidson | Daughter | — | 13 | ~1927 |
| Emma Davidson | Daughter | — | 1 | ~1939 |
| Buddy Davidson | Head | — | 38 | ~1902 |
| Estil Davidson | Son | — | 7 | ~1933 |
| Lettie Davidson | Spouse | — | 37 | ~1903 |
Census Appearances
1930
Clay, Kentucky
Daughter, age 3
Clay, Kentucky · implied b. ~1927 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Davidson |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | Kentucky |
| Father's Birthplace | Kentucky |
| Mother's Birthplace | Kentucky |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
1940
Clay-County, Kentucky
Daughter, age 13
Clay-County, Kentucky · implied b. ~1927 — 8 household members
| Surname | Davidson |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Kentucky |
| 1935 Residence (City) | Mag District #3 |
| 1935 Residence (County) | Clay |
| Highest Grade | No 4 |
| 1935 Residence | Same place |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
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 Davidson across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Davidson
Daughter · 1940 · age 13 · b. ~1927 · Kentucky
★ You are viewing this record
Sibling
Estil Davidson
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Rosalie Davidson
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Sylvenia Davidson
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Delphia Davidson
Sibling · 1940 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Emma Davidson
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 — Clay-County, Kentucky
Open full size
1940 US Federal Census — Clay-County, Kentucky
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01296-00462)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Martha Davidson | 15 | Daughter | — | Kentucky |
| 2 | Earnest Davidson | 14 | Son | — | Kentucky |
| 3 | Jessie Davidson | 12 | Son | — | Kentucky |
| 4 | Edith Davidson | 8 | Daughter | — | Kentucky |
| 5 | Robert Davidson | 4 | Son | — | Kentucky |
| 6 | Ray Davidson | 3 | Son | — | Kentucky |
| 7 | Levi Barger | 55 | Head | Laborer | Kentucky |
| 8 | Sophia Barger | 51 | Wife | — | Kentucky |
| 9 | James Annis Barger | 11 | Daughter | — | Kentucky |
| 10 | Glidewell|Glidewill Barger | 9 | Son | — | Kentucky |
| 11 | Bradley Hensley | 44 | Head | Esquire | Kentucky |
| 12 | Iva Hensley | 46 | Wife | — | Kentucky |
| 13 | James W. Hensley | 19 | Son | Laborer | Kentucky |
| 14 | Eldert Hensley | 17 | Son | Laborer | Kentucky |
| 15 | Author Hensley | 15 | Son | — | Kentucky |
| 16 | Earl Hensley | 11 | Son | — | Kentucky |
| 17 | Gilbert Hensley | 10 | Son | — | Kentucky |
| 18 | Verda Hensley | 7 | Daughter | — | Kentucky |
| 19 | Martha Hensley | 5 | Daughter | — | Kentucky |
| 20 | Carl Hensley | 9 | Nephew | — | Kentucky |
| 21 | Buddy Davidson | 38 | Head | Laborer | Kentucky |
| 22 | Lettie Davidson | 37 | Wife | — | Kentucky |
| 23 | Sylvenia Davidson | 15 | Daughter | — | Kentucky |
| 24 | Mary Davidson THIS PERSON | 13 | Daughter | — | Kentucky |
| 25 | Rosalie Davidson | 10 | Daughter | — | Kentucky |
| 26 | Estil Davidson | 7 | Son | — | Kentucky |
| 27 | Delphia Davidson | 4 | Daughter | — | Kentucky |
| 28 | Emma Davidson | 1 | Daughter | — | Kentucky |
| 29 | Romain Davidson | 81 | Head | — | Kentucky |
| 30 | Frank Barger | 29 | Head | Stone Dresser | Kentucky |
| 31 | Emma Barger | 29 | Wife | — | Kentucky |
| 32 | Ben Barger | 8 | Son | — | Kentucky |
| 33 | Daisy Barger | 5 | Daughter | — | Kentucky |
| 34 | Ally Davidson | 31 | Head | Laborer | Kentucky |
| 35 | Della Davidson | 29 | Wife | — | Kentucky |
| 36 | Marion Davidson | 10 | Son | — | Kentucky |
| 37 | Howard Davidson | 22 | Brother | Laborer | Kentucky |
| 38 | Elzie Davidson | 19 | Brother | Laborer | Kentucky |
| 39 | Edgar Davidson | 17 | Brother | Laborer | Kentucky |
| 40 | Floyd Davidson | 70 | Father | — | Kentucky |
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)