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Mary Blake — 1920 US Census Record
Model Tree available1920 United States Federal Census · Essex, Massachusetts
Our Model Tree links this Mary Blake across the 1900, 1910 and 1920 US Censuses in Essex, Massachusetts (XGBoost, ~Confirmed), with identified parents Richard & Mary — first a daughter (b.~1900), then head of a 6-person household.
Age 20
b. ~1900
Female
Daughter
Born: Massachusetts
Single
1920 Census Record Details
| Census Year | 1920 |
| Location | Essex, Massachusetts |
| Surname | Blake |
| Given Name | Mary A. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Additional Details | |
| Occupation | Meter Tester |
| Industry | Electric Co |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Meter Tester |
| Township / Ward | City Of Lynn |
| Est. Birth Year | ~1900 |
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.
6 people recorded at the same address in the 1920 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| William Blake | Son | — | 22 | ~1898 |
| Mary Blake | Daughter | — | 20 | ~1900 |
| Margaret Blake | Daughter | — | 17 | ~1903 |
| Richard Blake | Head | — | 49 | ~1871 |
| Isabelle Blake | Daughter | — | 12 | ~1908 |
| Mary Blake | Spouse | — | 50 | ~1870 |
Census Appearances
1900
Essex, Massachusetts
Daughter, age 2
Essex, Massachusetts · implied b. ~1898 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Blake |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Birth Month | Sept |
| Birth Year | 1898 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1910
Essex, Massachusetts
Daughter, age 11
Essex, Massachusetts · implied b. ~1899 — 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 | 11 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | English |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1920
Essex, Massachusetts
Daughter, age 20
Essex, Massachusetts · implied b. ~1900 — 6 household members
| Surname | Blake |
| Given Name | Mary A. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Meter Tester |
| Industry | Electric Co |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
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 (1900, 1910 and 1920) in Essex, Massachusetts, using XGBoost record linkage. Identified parents: father Richard Blake (~0.92 confidence) and mother Mary Blake (~0.92 confidence) and father Richard Blake (~0.92 confidence) and father Richard Blake (~0.92 confidence) and mother Mary Blake (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Richard Blake
b. ~1854
Source father
● Household
· direct · ~0.92
Mother
Mary Blake
b. ~1870
Source mother
● Household
· direct · ~0.92
Father
Richard Blake
b. ~1871
Source father
● Household
· direct · ~0.92
Father
Richard Blake
b. ~1871
Source father
● Household
· direct · ~0.92
Mother
Mary Blake
b. ~1873
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Blake
Daughter · 1920 · age 20 · b. ~1900 · Massachusetts
★ You are viewing this record
Sibling
Margaret Blake
Sibling · 1920 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Isabelle Blake
Sibling · 1920 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Blake
Sibling · 1920 · age 22
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
1920 US Federal Census — Essex, Massachusetts
Open full size
1920 US Federal Census — Essex, Massachusetts
Page Contents
50 people indexed on this census page (ia:1920:14thcensusofpopu695unit:0431)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Mary E. Nolan | 47 | Wife | — | Ireland |
| 2 | John T. Nolan | 21 | Son | — | Massachusetts |
| 3 | Harry J. Nolan | 19 | Son | Clerk | Massachusetts |
| 4 | James E. Nolan | 16 | Son | Insulator | Massachusetts |
| 5 | Joseph Nolan | 15 | Son | — | Massachusetts |
| 6 | Kathleen M. Nolan | 12 | Daughter | — | Massachusetts |
| 7 | Mary Nolan | 10 | Daughter | — | Massachusetts |
| 8 | William H. Nolan | 7 | Son | — | Massachusetts |
| 9 | Edward Nolan | 5 | Son | — | Massachusetts |
| 10 | Helen C. Nolan | 3 | Daughter | — | Massachusetts |
| 11 | Lakmhos Ghaldis | 34 | Head | Machinist | Greece |
| 12 | Vachleke Ghaldis | 26 | Wife | — | Greece |
| 13 | Arthur Ghaldis | 2 | Son | — | Massachusetts |
| 14 | Nikolita Ghaldis | 35 | Sister | Bench Work | Greece |
| 15 | Athena Ghaldis | 21 | Sister | Bench Work | Greece |
| 16 | Patrick J. Roach | 25 | Head | Laster | Massachusetts |
| 17 | Elizabeth J. Roach | 28 | Wife | — | Ireland |
| 18 | John Roach | 0 | Son | — | Massachusetts |
| 19 | Richard Blake | 49 | Head | Laborer | Ireland |
| 20 | Mary G. Blake | 50 | Wife | — | Ireland |
| 21 | William T. Blake | 22 | Son | Lathe Hand | Massachusetts |
| 22 | Mary A. Blake THIS PERSON | 20 | Daughter | Meter Tester | Massachusetts |
| 23 | Margaret Blake | 17 | Daughter | Winder | Massachusetts |
| 24 | Isabelle Blake | 12 | Daughter | — | Massachusetts |
| 25 | Nicholas Kostantopulos | 25 | Head | Operative | Greece |
| 26 | Mary Kostantopulos | 26 | Wife | — | Greece |
| 27 | Paul Kostantopulos | 3 | Son | — | Massachusetts |
| 28 | George Kostantopulos | 1 | Son | — | Massachusetts |
| 29 | Peter Petroplos | 35 | Head | Laborer | Greece |
| 30 | Mary Petroplos | 42 | Wife | — | Greece |
| 31 | Charles Petroplos | 20 | Son | Lathe Hand | Greece |
| 32 | George Petroplos | 16 | Son | — | Greece |
| 33 | Frank Petroplos | 15 | Son | — | Greece |
| 34 | Peter Petroplos | 8 | Son | — | Illinois |
| 35 | William Karakos | 44 | Head | Laborer | Greece |
| 36 | Stafoly Karakos | 35 | Wife | Bench Work | Greece |
| 37 | Charles Dematropoulos | 47 | Boarder | Laborer | Greece |
| 38 | Peter Dematropoulos | 35 | Boarder | Laborer | Greece |
| 39 | Andrew Vallas | 32 | Boarder | Stock Keeper | Greece |
| 40 | William Vallas | 55 | Boarder | Laborer | Greece |
| 41 | Mary Sweeney | 54 | Head | — | New Brunswick |
| 42 | Helen G. Sweeney | 24 | Daughter | Assembler | Massachusetts |
| 43 | John J. Sweeney | 22 | Son | Inspector | Massachusetts |
| 44 | Michael J. Casing | 48 | Head | Graining | Massachusetts |
| 45 | Nellie E. Casing | 47 | Wife | — | Massachusetts |
| 46 | Charles W. Casing | 16 | Son | Buffer | Massachusetts |
| 47 | Daniel Keller | 15 | Nephew | — | Massachusetts |
| 48 | Harry E. Bullock | 36 | Head | Machinist | California |
| 49 | Julia A. Bullock | 34 | Wife | — | Prince Edw. Island |
| 50 | Mildred L. Bullock | 12 | Daughter | — | Massachusetts |
Related Census Records
Pedigree Summary
Mary + 3 siblings
Gen 1 · 5 parents
~0.92
Max depth 4 (1900–1950 window)
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1920 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)