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Mary Blackwell — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Essex-County, New Jersey
Our Model Tree links this Mary Blackwell across the 1920, 1930 and 1940 US Censuses in Essex-County, New Jersey (XGBoost, ~Confirmed) — first a head (b.~1886), then head of a 3-person household.
Age 54
b. ~1886
Female
Head
Born: Virginia
Widowed
1940 Census Record Details
| Census Year | 1940 |
| Location | Essex-County, New Jersey |
| Surname | Blackwell |
| Given Name | Mary |
| Relationship to Head | head |
| Sex | F |
| Color / Race | Black |
| Age | 54 |
| Marital Status | Widowed |
| Birthplace | Virginia |
| 1935 Residence (City) | Montclair Town |
| 1935 Residence (County) | Essex |
| Additional Details | |
| Occupation | lodging house keeper |
| Industry | lodging house |
| Class of Worker | OA |
| Highest Grade | No 4 |
| 1935 Residence | Same House |
| Birth State | Virginia |
| Birth Country | United States |
| Birthplace (normalized) | virginia |
| Occupation | Lodging House Keeper |
| Township / Ward | Montclair Town |
| Est. Birth Year | ~1886 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Julia Blackwell | Daughter | — | 17 | ~1923 |
| Mary Blackwell | Head | — | 54 | ~1886 |
| Hazel Blackwell | Daughter | — | 12 | ~1928 |
Census Appearances
1920
Essex, New …
Head, age 37
Essex, New Jersey · implied b. ~1883 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Blackwell |
| Given Name | Mary |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | Black |
| Age | 37 |
| Marital Status | Widowed |
| Birthplace | Virginia |
| Father's Birthplace | Virginia |
| Mother's Birthplace | Virginia |
| Occupation | Domestic Private |
| Industry | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Home Owned/Rented | R |
| Birth State | Virginia |
| Birth Country | United States |
| Birthplace (normalized) | virginia |
1930
Essex, New …
Head, age 47
Essex, New Jersey · implied b. ~1883 — 12 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Blackwell |
| Given Name | Mary E. |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | Black |
| Age | 47 |
| Marital Status | Widowed |
| Birthplace | Virginia |
| Age at First Marriage | 22 |
| Father's Birthplace | Virginia |
| Mother's Birthplace | Virginia |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 125 |
| Birth State | Virginia |
| Birth Country | United States |
| Birthplace (normalized) | virginia |
1940
Essex-County, New …
Head, age 54
Essex-County, New Jersey · implied b. ~1886 — 3 household members
| Surname | Blackwell |
| Given Name | Mary |
| Relationship to Head | head |
| Sex | F |
| Color / Race | Black |
| Age | 54 |
| Marital Status | Widowed |
| Birthplace | Virginia |
| 1935 Residence (City) | Montclair Town |
| 1935 Residence (County) | Essex |
| Occupation | lodging house keeper |
| Industry | lodging house |
| Class of Worker | OA |
| Highest Grade | No 4 |
| 1935 Residence | Same House |
| Birth State | Virginia |
| Birth Country | United States |
| Birthplace (normalized) | 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 Blackwell across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Mary Blackwell
Head · 1940 · age 54 · b. ~1886 · New Jersey
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Essex-County, New Jersey
Open full size
1940 US Federal Census — Essex-County, New Jersey
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-02337-00775)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Thomas Jr. De Marco | 5 | son | — | New Jersey |
| 2 | Sebastian Sandora | 25 | head | Mechanic | New Jersey |
| 3 | Germina Sandora | 22 | wife | — | New Jersey |
| 4 | Joanna Sandora | 0 | daughter | — | New Jersey |
| 5 | Vito Sandora | 87 | grand uncle | — | Italy |
| 6 | Panfilio Rastelli | 48 | head | Laborer | New York |
| 7 | Mary Rastelli | 40 | wife | — | Italy |
| 8 | Bridget Rastelli | 19 | daughter | Sewer | New Jersey |
| 9 | Dena Rastelli | 17 | daughter | — | New Jersey |
| 10 | Charles Rastelli | 15 | son | — | New Jersey |
| 11 | Vincent Rastelli | 11 | son | — | New Jersey |
| 12 | Annette Rastelli | 6 | daughter | — | New Jersey |
| 13 | Henry Rastelli | 5 | son | — | New Jersey |
| 14 | William Mccraw | 59 | head | Carpenter | Virginia |
| 15 | Hattie Mccraw | 45 | wife | Maid | Virginia |
| 16 | William Jr. Mccraw | 14 | son | — | New Jersey |
| 17 | Arthur Mayo | 49 | lodger | — | — |
| 18 | David Morton | 42 | head | — | — |
| 19 | Mary Morton | 40 | wife | — | — |
| 20 | Elizabeth Morton | 21 | daughter | Maid | New Jersey |
| 21 | Jean Morton | 12 | daughter | — | New Jersey |
| 22 | Davis Jr. Morton | 10 | son | — | New Jersey |
| 23 | Lorraine Morton | 9 | daughter | — | New Jersey |
| 24 | Helen Morton | 6 | daughter | — | New Jersey |
| 25 | James Morton | 4 | son | — | New Jersey |
| 26 | Charles Fain | 55 | head | Carpenter | North Carolina |
| 27 | Ruth Fain | 35 | wife | — | Florida |
| 28 | Charles Fain | 13 | son | — | New Jersey |
| 29 | Thomas Fain | 12 | son | — | New Jersey |
| 30 | Adonie Ruth Fain | 9 | daughter | — | New Jersey |
| 31 | David Fain | 7 | son | — | New Jersey |
| 32 | Grace Fain | 4 | daughter | — | New Jersey |
| 33 | Alexander Stewart | 36 | head | — | — |
| 34 | Anna Parrot | 40 | head | Maid | South Carolina |
| 35 | Mary Smith | 67 | head | — | Virginia |
| 36 | Donald Harold Smith | 22 | lodger | — | — |
| 37 | Mary Blackwell THIS PERSON | 54 | head | Lodging House Keeper | Virginia |
| 38 | Julia Blackwell | 17 | daughter | — | New Jersey |
| 39 | Hazel Blackwell | 12 | daughter | — | New Jersey |
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)