RB
Robert Black — 1940 US Census Record
Model Tree available1940 United States Federal Census · Middlesex-County, Massachusetts
Our Model Tree links this Robert Black across the 1920, 1930 and 1940 US Censuses in Middlesex-County, Massachusetts (XGBoost, ~Confirmed), with identified parents Frank & Mary — first a son (b.~1913), then head of a 5-person household.
Age 27
b. ~1913
Male
Son
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, Massachusetts |
| Surname | Black |
| Given Name | Robert H. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Everett City |
| 1935 Residence (County) | Middlesex |
| Additional Details | |
| Occupation | new worker |
| Class of Worker | PW |
| Hours Worked | 52 |
| Income (1939) | 600 |
| Highest Grade | H 4 |
| 1935 Residence | Same house |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | New Worker |
| Township / Ward | Everett City |
| Est. Birth Year | ~1913 |
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 Robert | Age | Birth yr |
|---|---|---|---|---|
| Frank Black | Head | — | 51 | ~1889 |
| Lawrence Black | Son | — | 13 | ~1927 |
| Robert Black | Son | — | 27 | ~1913 |
| Frederick Black | Son | — | 21 | ~1919 |
| Mary Black | Spouse | — | 50 | ~1890 |
Census Appearances
1920
Middlesex, Massachusetts
Son, age 7
Middlesex, Massachusetts · implied b. ~1913 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Black |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 7 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Maine |
| Mother's Birthplace | Scotland |
| Mother Tongue | English |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Middlesex, Massachusetts
Son, age 17
Middlesex, Massachusetts · implied b. ~1913 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Black |
| Given Name | Robert H. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Maine |
| Mother's Birthplace | Massachusetts |
| Occupation | Janitor |
| Industry | Restaurant |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Middlesex-County, Massachusetts
Son, age 27
Middlesex-County, Massachusetts · implied b. ~1913 — 5 household members
| Surname | Black |
| Given Name | Robert H. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Everett City |
| 1935 Residence (County) | Middlesex |
| Occupation | new worker |
| Class of Worker | PW |
| Hours Worked | 52 |
| Income (1939) | 600 |
| Highest Grade | H 4 |
| 1935 Residence | Same house |
| 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 Robert Black across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Frank Black (~0.92 confidence) and mother Mary Black (~0.92 confidence) and mother Mary Black (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Frank Black
b. ~1888
Source father
● Household
· direct · ~0.92
Mother
Mary Black
b. ~1890
Source mother
● Household
· direct · ~0.92
Mother
Mary Black
b. ~1890
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Robert Black
Son · 1940 · age 27 · b. ~1913 · Massachusetts
★ You are viewing this record
Sibling
Lawrence Black
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Frederick Black
Sibling · 1940 · age 21
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 — Middlesex-County, Massachusetts
Open full size
1940 US Federal Census — Middlesex-County, Massachusetts
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01604-00652)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Margaret M. Hewitt | 17 | Daughter | — | Massachusetts |
| 2 | Rose M. Hewitt | 7 | Daughter | — | Massachusetts |
| 3 | Morris Rayman | 54 | Head | — | Lithuania |
| 4 | Sonia Rayman | 49 | Wife | — | Lithuania |
| 5 | Florence Rayman | 9 | Daughter | — | Massachusetts |
| 6 | Holger Holger | 48 | Head | Watchman | Denmark |
| 7 | Ida Holger | 40 | Wife | — | Massachusetts |
| 8 | Natalie Holger | 13 | Daughter | — | Massachusetts |
| 9 | Phyllis Holger | 8 | Daughter | — | Massachusetts |
| 10 | John Holger | 4 | Son | — | Massachusetts |
| 11 | James F. Byron | 47 | Head | Laborer | Massachusetts |
| 12 | Anastasia Byron | 36 | Wife | — | England |
| 13 | James Byron | 14 | Son | — | Massachusetts |
| 14 | Ralph Jr. Byron | 12 | Son | — | Massachusetts |
| 15 | John H. Byron | 9 | Son | — | Massachusetts |
| 16 | Vincent Tamboli | 58 | Head | Laborer | Italy |
| 17 | Lena Tamboli | 48 | Wife | — | Italy |
| 18 | Mario Tamboli | 23 | Son | Clerk | Massachusetts |
| 19 | George Tamboli | 20 | Son | — | Massachusetts |
| 20 | Lawrence Tamboli | 12 | Son | — | Massachusetts |
| 21 | Frank Smick | 36 | Head | Engineer | Massachusetts |
| 22 | Sarah Smick | 35 | Wife | — | Massachusetts |
| 23 | Francis Smick | 11 | Son | — | Massachusetts |
| 24 | Aileen Smick | 11 | Daughter | — | Massachusetts |
| 25 | Harold Smick | 8 | Son | — | Massachusetts |
| 26 | Margery Smick | 7 | Daughter | — | Massachusetts |
| 27 | Chester Smick | 4 | Son | — | Massachusetts |
| 28 | Greta Marku | 44 | Head | — | Massachusetts |
| 29 | Carl Marku | 23 | Son | Pin Boy | Massachusetts |
| 30 | Nicholas Marku | 19 | Son | — | Massachusetts |
| 31 | Christine Marku | 17 | Daughter | — | Massachusetts |
| 32 | Allan Marku | 16 | Son | — | Massachusetts |
| 33 | Lawrence Marku | 15 | Son | — | Massachusetts |
| 34 | Evelyn Marku | 13 | Daughter | — | Massachusetts |
| 35 | Sumner Marku | 10 | Son | — | Massachusetts |
| 36 | Frank A. Black | 51 | Head | Painter | Maine |
| 37 | Mary Black | 50 | Wife | — | Massachusetts |
| 38 | Robert H. Black THIS PERSON | 27 | Son | New Worker | Massachusetts |
| 39 | Frederick Black | 21 | Son | New Worker | Massachusetts |
| 40 | Lawrence Black | 13 | Son | — | Massachusetts |
Pedigree Summary
Robert + 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)