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Mary Blake — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Baltimore-City-County, Maryland
Our Model Tree links this Mary Blake across the 1930 and 1940 US Censuses in Baltimore-City-County, Maryland (XGBoost, ~Confirmed) — first a daughter (b.~1916), then head of a 19-person household.
Age 24
b. ~1916
Female
Daughter
Born: Maryland
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Baltimore-City-County, Maryland |
| Surname | Blake |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 24 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Baltimore City |
| Additional Details | |
| Highest Grade | No |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Township / Ward | Baltimore City |
| Est. Birth Year | ~1916 |
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.
19 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Thomas Peterson | Son | — | 1 | ~1939 |
| Mary Peterson | Daughter | — | 14 | ~1926 |
| William Peterson | Other | — | 12 | ~1928 |
| Bennie Stanback | Other | — | 50 | ~1890 |
| Mary Blake | Daughter | — | 24 | ~1916 |
| Lucy Stanback | Other | — | 50 | ~1890 |
| Louise Blake | Daughter | — | 15 | ~1925 |
| Agnes Peterson | Daughter | — | 6 | ~1934 |
| Benjamin Blake | Son | — | 20 | ~1920 |
| Carrie Blake | Daughter | — | 18 | ~1922 |
| Rosetta Peterson | Daughter | — | 5 | ~1935 |
| Colton Wissoni Wissone | Head | — | 51 | ~1889 |
| Cornelius Blake | Son | — | 22 | ~1918 |
| James Blake | Son | — | 25 | ~1915 |
| Jannie Wissoni Wissone | Spouse | — | 45 | ~1895 |
| Rose Blake | Other | — | 41 | ~1899 |
| Marie Blake | Daughter | — | 21 | ~1919 |
| William Peterson | Other | — | 23 | ~1917 |
| Rosalie Blake | Daughter | — | 10 | ~1930 |
Census Appearances
1930
Baltimore, Maryland
Other, age 13
Baltimore, Maryland · implied b. ~1917 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Blake |
| Given Name | Mable |
| Relationship to Head | Niece |
| Sex | F |
| Color / Race | Black |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Can Read/Write | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Baltimore-City-County, Maryland
Daughter, age 24
Baltimore-City-County, Maryland · implied b. ~1916 — 19 household members
| Surname | Blake |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 24 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Baltimore City |
| Highest Grade | No |
| 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 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Blake
Daughter · 1940 · age 24 · b. ~1916 · Maryland
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Sibling
Louise Blake
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Cornelius Blake
Sibling · 1940 · age 22
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Rosetta Peterson
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Blake
Sibling · 1940 · age 25
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Marie Blake
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Rosalie Blake
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Agnes Peterson
Sibling · 1940 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Carrie Blake
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Benjamin Blake
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Peterson
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas Peterson
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 — Baltimore-City-County, Maryland
Open full size
1940 US Federal Census — Baltimore-City-County, Maryland
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01526-00488)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Elizabeth Vaughn | 28 | Head | Servant | Virginia |
| 2 | Hurst Montford | 24 | Head | Auto Mech. | Virginia |
| 3 | James Smith | 40 | Head | Upholsterer | Maryland |
| 4 | Clara Smith | 36 | Wife | — | Maryland |
| 5 | Idola Smith | 18 | Daughter | — | Maryland |
| 6 | Glendora Smith | 15 | Daughter | — | Maryland |
| 7 | Mary Smith | 57 | Mother | — | Virginia |
| 8 | Roland Smith | 72 | Father | — | Virginia |
| 9 | Morris Etelson | 67 | Head | Tailor | Russia |
| 10 | Eve Etelson | 50 | Wife | — | Russia |
| 11 | Herbert Fleming | 52 | Head | Tinner | Maryland |
| 12 | Mayant | Margaret Fleming | 52 | Wife | — | Maryland |
| 13 | Herbert Fleming | 29 | Son | — | Maryland |
| 14 | Rosella Fleming | 25 | Daughter | — | Maryland |
| 15 | Mayant | Margaret Fleming | 21 | Daughter | — | Maryland |
| 16 | Rose Harris | 47 | Head | — | Virginia |
| 17 | Robert Evelyn Harris | 28 | Daughter | Servant | Maryland |
| 18 | Rose Harris | 19 | Daughter | Maid | Maryland |
| 19 | James Davis | 13 | Son | — | Maryland |
| 20 | Robert Melvin Davis | 11 | Son | — | Maryland |
| 21 | Colton Wissoni | Wissone | 51 | Head | Longshoreman | N. Carolina |
| 22 | Jannie Wissoni | Wissone | 45 | Wife | — | N. Carolina |
| 23 | Bennie Stanback | 50 | Lodger | Cement Worker | Virginia |
| 24 | Lucy Stanback | 50 | Lodger | Servant | Virginia |
| 25 | Rose Blake | 41 | Mother | Gen. Worker | Virginia |
| 26 | James Blake | 25 | Son | Laborer | Maryland |
| 27 | Mary Blake THIS PERSON | 24 | Daughter | — | Maryland |
| 28 | Cornelius Blake | 22 | Son | — | Maryland |
| 29 | Marie Blake | 21 | Daughter | — | Maryland |
| 30 | Benjamin Blake | 20 | Son | — | Maryland |
| 31 | Carrie Blake | 18 | Daughter | — | Maryland |
| 32 | Louise Blake | 15 | Daughter | — | Maryland |
| 33 | Rosalie Blake | 10 | Daughter | — | Maryland |
| 34 | William Peterson | 12 | Grandson | — | Maryland |
| 35 | Mary Peterson | 14 | Daughter | Laundress | Maryland |
| 36 | William Peterson | 23 | Son-in-law | Helper | Maryland |
| 37 | Agnes Peterson | 6 | Daughter | — | Maryland |
| 38 | Rosetta Peterson | 5 | Daughter | — | Maryland |
| 39 | Thomas Peterson | 1 | Son | — | Maryland |
| 40 | Joseph Alexander | 45 | Head | Laborer | 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)