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Mary Blake — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Harrison-County, West Virginia
Our Model Tree links this Mary Blake across the 1930 and 1940 US Censuses in Harrison-County, West Virginia (XGBoost, ~Confirmed) — first a daughter (b.~1925), then head of a 11-person household.
Age 15
b. ~1925
Female
Daughter
Born: West Virginia
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Harrison-County, West Virginia |
| Surname | Blake |
| Given Name | Mary E. |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | West Virginia |
| 1935 Residence (City) | Clay District |
| 1935 Residence (County) | Harrison |
| Additional Details | |
| Industry | 0 |
| Highest Grade | No 7 |
| 1935 Residence | Same Place |
| Birth State | West Virginia |
| Birth Country | United States |
| Birthplace (normalized) | west virginia |
| Township / Ward | Clay District |
| Est. Birth Year | ~1925 |
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.
11 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Lena Blake | Daughter | — | 3 | ~1937 |
| Mary Blake | Daughter | — | 15 | ~1925 |
| Leeroy Blake | Son | — | 5 | ~1935 |
| Maggie Blake | Spouse | — | 44 | ~1896 |
| Richard Blake | Son | — | 2 | ~1938 |
| William Blake | Head | — | 50 | ~1890 |
| John Blake | Son | — | ~1940 | |
| Virgil Blake | Son | — | 7 | ~1933 |
| George Blake | Son | — | 7 | ~1933 |
| Helen Blake | Daughter | — | 13 | ~1927 |
| Albert Blake | Son | — | 23 | ~1917 |
Census Appearances
1930
Harrison, West …
Daughter, age 5
Harrison, West Virginia · implied b. ~1925 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Blake |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | West Virginia |
| Father's Birthplace | West Virginia |
| Mother's Birthplace | West Virginia |
| Occupation | none |
| Birth State | West Virginia |
| Birth Country | United States |
| Birthplace (normalized) | west virginia |
1940
Harrison-County, West …
Daughter, age 15
Harrison-County, West Virginia · implied b. ~1925 — 11 household members
| Surname | Blake |
| Given Name | Mary E. |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | West Virginia |
| 1935 Residence (City) | Clay District |
| 1935 Residence (County) | Harrison |
| Industry | 0 |
| Highest Grade | No 7 |
| 1935 Residence | Same Place |
| Birth State | West Virginia |
| Birth Country | United States |
| Birthplace (normalized) | west virginia |
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 Blake across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Blake
Daughter · 1940 · age 15 · b. ~1925 · West Virginia
★ You are viewing this record
Sibling
Leeroy Blake
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lena Blake
Sibling · 1940 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Helen Blake
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Blake
Sibling · 1940 · age
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Virgil Blake
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
George Blake
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Albert Blake
Sibling · 1940 · age 23
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Richard Blake
Sibling · 1940 · age 2
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 — Harrison-County, West Virginia
Open full size
1940 US Federal Census — Harrison-County, West Virginia
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-04408-01111)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Mildred W. Mullenax | 7 | daughter | — | West Virginia |
| 2 | Robert E. Mullenax | 4 | son | — | West Virginia |
| 3 | Raymond Mullenax | 2 | son | — | West Virginia |
| 4 | William H. Blake | 50 | Head | Laborer | West Virginia |
| 5 | Maggie L. Blake | 44 | Wife | House Work | West Virginia |
| 6 | Albert Blake | 23 | son | — | West Virginia |
| 7 | Mary E. Blake THIS PERSON | 15 | daughter | — | West Virginia |
| 8 | Helen L. Blake | 13 | daughter | — | West Virginia |
| 9 | Virgil D. Blake | 7 | son | — | West Virginia |
| 10 | George R. Blake | 7 | son | — | West Virginia |
| 11 | Leeroy Blake | 5 | son | — | West Virginia |
| 12 | Lena K. Blake | 3 | daughter | — | West Virginia |
| 13 | Richard E. Blake | 2 | son | — | West Virginia |
| 14 | John J. Blake | 0 | son | — | West Virginia |
| 15 | Amos H. Courtney | 36 | Head | Motorman | West Virginia |
| 16 | Grace E. Courtney | 36 | Wife | House Work | West Virginia |
| 17 | John R. Courtney | 18 | son | Student | West Virginia |
| 18 | Amos B. Courtney | 16 | son | Student | West Virginia |
| 19 | Alice J. Courtney | 3 | daughter | — | West Virginia |
| 20 | Wilbur L. Anderson | 37 | Head | Coal Loader | West Virginia |
| 21 | Mamie C. Anderson | 38 | Wife | House Work | West Virginia |
| 22 | Harold L. Anderson | 15 | son | — | West Virginia |
| 23 | Mary L. Anderson | 10 | daughter | — | West Virginia |
| 24 | Dalton M. Beveridge | 25 | Head | Works On Tipple | West Virginia |
| 25 | Gladys M. Beveridge | 22 | Wife | House Work | West Virginia |
| 26 | Keith J. Beveridge | 3 | son | — | West Virginia |
| 27 | Elza L. Bowas | 36 | Head | Joiner | West Virginia |
| 28 | Molly B. Bowas | 31 | Wife | House Work | West Virginia |
| 29 | Virginia B. Kalbaugh | 12 | Niece | — | West Virginia |
| 30 | Ralph G. Chambers | 23 | Head | Coal Loader | West Virginia |
| 31 | Margaret B. Chambers | 20 | Wife | House Work | West Virginia |
| 32 | Ronald E. Chambers | 0 | son | — | West Virginia |
| 33 | Raymond E. Blake | 21 | Head | Farm Work | West Virginia |
| 34 | Mabel F. Blake | 28 | Wife | House Work | West Virginia |
| 35 | George W. King | 46 | Head | Motorman | West Virginia |
| 36 | Mary L. King | 33 | Wife | House Work | West Virginia |
| 37 | Leonard C. King | 17 | son | — | West Virginia |
| 38 | Clarence E. King | 14 | son | — | West Virginia |
| 39 | Marjorie M. King | 12 | daughter | — | West Virginia |
| 40 | Ralph Starkey | 21 | Head | Coal Loader | West Virginia |
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)