MD
Mary Davidson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Hardin-County, Illinois
Our Model Tree links this Mary Davidson across the 1930 and 1940 US Censuses in Hardin-County, Illinois (XGBoost, ~Confirmed) — first a daughter (b.~1930), then head of a 9-person household.
Age 10
b. ~1930
Female
Daughter
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Hardin-County, Illinois |
| Surname | Davidson |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Some Place |
| 1935 Residence (County) | Some Place |
| Additional Details | |
| Highest Grade | No 3 |
| 1935 Residence | Some Place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Rosiclare Village |
| Est. Birth Year | ~1930 |
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 |
|---|---|---|---|---|
| Waneta Davidson | Daughter | — | 15 | ~1925 |
| Geneva Davidson | Daughter | — | 18 | ~1922 |
| Lorene Davidson | Daughter | — | 3 | ~1937 |
| Loretta Davidson | Daughter | — | 5 | ~1935 |
| Mary Davidson | Daughter | — | 10 | ~1930 |
| Jesse Davidson | Head | — | 37 | ~1903 |
| Russell Davidson | Son | — | 8 | ~1932 |
| Troy Davidson | Son | — | 19 | ~1921 |
| Nattie Davidson | Spouse | — | 38 | ~1902 |
Census Appearances
1930
Hardin, Illinois
Daughter, age 1
Hardin, Illinois · implied b. ~1929 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Davidson |
| Given Name | Mary E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Kentucky |
| Mother's Birthplace | Tennessee |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Hardin-County, Illinois
Daughter, age 10
Hardin-County, Illinois · implied b. ~1930 — 9 household members
| Surname | Davidson |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Some Place |
| 1935 Residence (County) | Some Place |
| Highest Grade | No 3 |
| 1935 Residence | Some Place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
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 10 · b. ~1930 · Illinois
★ You are viewing this record
Sibling
Waneta Davidson
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Russell Davidson
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Loretta Davidson
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Troy Davidson
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Geneva Davidson
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lorene Davidson
Sibling · 1940 · age 3
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 — Hardin-County, Illinois
Open full size
1940 US Federal Census — Hardin-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00810-00911)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Eugene | 4 | Son | — | Illinois |
| 2 | Frisler Monroe | 34 | Head | Laborer | Kentucky |
| 3 | Anna Monroe | 30 | Wife | — | Illinois |
| 4 | James Monroe | 11 | Son | — | Illinois |
| 5 | Waneta Monroe | 8 | Daughter | — | Illinois |
| 6 | Shirley Monroe | 3 | Daughter | — | Illinois |
| 7 | Harry Fulghum | 40 | Brother-in-law | — | Illinois |
| 8 | John Meeks | 45 | Head | Laborer | Kentucky |
| 9 | Beulah Meeks | 38 | Wife | — | Kentucky |
| 10 | Zada Meeks | 16 | Daughter | — | Kentucky |
| 11 | Dorothy Meeks | 15 | Daughter | — | Kentucky |
| 12 | Melba Meeks | 13 | Daughter | — | Kentucky |
| 13 | Louise Meeks | 9 | Daughter | — | Illinois |
| 14 | Beatrice Showaters | 52 | Head | — | Illinois |
| 15 | Alfred Showaters | 27 | Son | Laborer | Illinois |
| 16 | Virgil Palmer | 38 | Head | Laborer | Illinois |
| 17 | Elsie Palmer | 36 | Wife | — | Illinois |
| 18 | Beatrice Palmer | 14 | Daughter | — | Illinois |
| 19 | Virgil, E. Palmer | 13 | Son | — | Illinois |
| 20 | Helen Palmer | 11 | Daughter | — | Illinois |
| 21 | Lois Palmer | 10 | Daughter | — | Illinois |
| 22 | Herschel Palmer | 6 | Son | — | Illinois |
| 23 | Jesse Davidson | 37 | Head | Laborer | Kentucky |
| 24 | Nattie Davidson | 38 | Wife | — | Kentucky |
| 25 | Troy Davidson | 19 | Son | Laborer | Illinois |
| 26 | Geneva Davidson | 18 | Daughter | — | Illinois |
| 27 | Waneta Davidson | 15 | Daughter | — | Illinois |
| 28 | Mary Davidson THIS PERSON | 10 | Daughter | — | Illinois |
| 29 | Russell Davidson | 8 | Son | — | Illinois |
| 30 | Loretta Davidson | 5 | Daughter | — | Illinois |
| 31 | Lorene Davidson | 3 | Daughter | — | Illinois |
| 32 | Mckinley Vaughn | 39 | Head | Laborer | Illinois |
| 33 | Mollie Vaughn | 32 | Wife | — | Illinois |
| 34 | Rudell Vaughn | 17 | Son | — | Illinois |
| 35 | Wilma Vaughn | 15 | Daughter | — | Illinois |
| 36 | Horace Mc Caughan | 58 | Head | Engineer | Illinois |
| 37 | Leila Mc Caughan | 51 | Wife | — | Illinois |
| 38 | Glen Mc Caughan | 33 | Son | — | Illinois |
| 39 | Earl Mc Caughan | 27 | Son | — | Illinois |
| 40 | Dorothy Mc Caughan | 16 | Daughter | — | Illinois |
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)