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Mary Blake — 1940 US Census Record
Model Tree available1940 United States Federal Census · Allegany-County, Maryland
Our Model Tree links this Mary Blake across the 1920, 1930 and 1940 US Censuses in Allegany-County, Maryland (XGBoost, ~Confirmed), with identified parents Margaret & Oscar — first a daughter (b.~1901), then head of a 5-person household.
Age 39
b. ~1901
Female
Daughter
Born: Maryland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Allegany-County, Maryland |
| Surname | Blake |
| Given Name | Mary J. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 39 |
| Marital Status | Married |
| Birthplace | Maryland |
| 1935 Residence (City) | Cumberland City |
| 1935 Residence (County) | Allegany |
| Additional Details | |
| Industry | H |
| Class of Worker | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Township / Ward | Cumberland City |
| Est. Birth Year | ~1901 |
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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Agnes Mccarroll | Daughter | — | 50 | ~1890 |
| Mary Blake | Daughter | — | 39 | ~1901 |
| J Blake | Other | — | 39 | ~1901 |
| Margaret Blake | Daughter | — | 4 | ~1936 |
| Margaret Mccarroll | Head | — | 72 | ~1868 |
Census Appearances
1920
Allegany, Maryland
Daughter, age 17
Allegany, Maryland · implied b. ~1903 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Blake |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1930
Allegany, Maryland
Daughter, age 27
Allegany, Maryland · implied b. ~1903 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Blake |
| Given Name | Mary E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 27 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Occupation | Teacher |
| Industry | Public School |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Allegany-County, Maryland
Daughter, age 39
Allegany-County, Maryland · implied b. ~1901 — 5 household members
| Surname | Blake |
| Given Name | Mary J. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 39 |
| Marital Status | Married |
| Birthplace | Maryland |
| 1935 Residence (City) | Cumberland City |
| 1935 Residence (County) | Allegany |
| Industry | H |
| Class of Worker | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
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 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Margaret Mccarroll (~0.92 confidence) and father Oscar Blake (~0.92 confidence) and mother Mary Blake (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Margaret Mccarroll
b. ~1868
Source mother
● Household
· direct · ~0.92
Father
Oscar Blake
b. ~1877
Source father
● Household
· direct · ~0.92
Mother
Mary Blake
b. ~1883
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Blake
Daughter · 1940 · age 39 · b. ~1901 · Maryland
★ You are viewing this record
Sibling
Margaret Blake
Sibling · 1940 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Agnes Mccarroll
Sibling · 1940 · age 50
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 — Allegany-County, Maryland
Open full size
1940 US Federal Census — Allegany-County, Maryland
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01498-00470)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Milton Drubeck | 45 | Wife | — | Maryland |
| 2 | Hannah Drubeck | 11 | Daughter | — | Maryland |
| 3 | Margaret Herboldshimer | 39 | Head | — | Maryland |
| 4 | Margaret Herboldshimer | 35 | Sister | Spinner | Maryland |
| 5 | Charles E. Thompson | 67 | Head | Conductor | Maryland |
| 6 | Laura A. Thompson | 66 | Wife | — | Maryland |
| 7 | William H. Buley | 56 | Brother-in-law | — | Maryland |
| 8 | Sister-In-Law Maude R. | None | F | City | — |
| 9 | Lucy Reith | 65 | Head | Stenographer | England |
| 10 | Margaret Reith | 38 | Daughter | Stenographer | Maryland |
| 11 | Charles Reith | 32 | Son | Bottler | Maryland |
| 12 | Margaret Mccarroll | 72 | Head | — | Maryland |
| 13 | Agnes Mccarroll | 50 | Daughter | Teacher | Maryland |
| 14 | J. Edward Blake | 39 | Son-in-law | Electrician | Maryland |
| 15 | Mary J. Blake THIS PERSON | 39 | Daughter | — | Maryland |
| 16 | Margaret Blake | 4 | Daughter | — | Maryland |
| 17 | August H. Togman | 83 | Head | — | Maryland |
| 18 | Mary M. Leasure | 50 | Daughter | — | Maryland |
| 19 | Margaret Leasure | 28 | Granddaughter | Sales Lady | Maryland |
| 20 | George H. Togman | 49 | Head | Owner | Maryland |
| 21 | Viola M. Togman | 45 | Wife | — | Maryland |
| 22 | George Togman | 19 | Son | Salesman | Maryland |
| 23 | Margaret J. Brown | 54 | Head | Laundress | Maryland |
| 24 | Richard Brown | 18 | Son | — | Maryland |
| 25 | Robert Brown | 17 | Son | — | Maryland |
| 26 | Audrey Brown | 13 | Daughter | — | Maryland |
| 27 | Earl G. Stevens | 27 | Lodger | Hair Dresser | Maryland |
| 28 | Stevens | 9 | Lodger | — | Maryland |
| 29 | Elizabeth Williams | 81 | Head | — | Maryland |
| 30 | Richard Williams | 59 | Son | — | Maryland |
| 31 | Marie Williams | 42 | Daughter | — | Maryland |
| 32 | John Thomas Williams | 31 | Grandson | Machinist | Maryland |
| 33 | Henry J. Apel | 77 | Head | — | Maryland |
| 34 | John Smith | 35 | Son-in-law | Clerk | Maryland |
| 35 | Thelma Smith | 34 | Daughter | — | Maryland |
| 36 | Robert Smith | 11 | Grandson | — | Maryland |
| 37 | Abel Ina Smith | 39 | Daughter | Clerk | Maryland |
| 38 | Mary Forbes | 40 | Head | Clerk | Missouri |
| 39 | Rosella Forbes | 38 | Wife | — | Maryland |
| 40 | Betty L. Forbes | 16 | Daughter | — | Maryland |
Pedigree Summary
Mary + 2 siblings
Gen 1 · 3 parents
~0.92
Max depth 4 (1900–1950 window)
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)