RB
Robert Black — 1930 US Census Record
Model Tree available1930 United States Federal Census · Middlesex, Massachusetts
Our Model Tree links this Robert Black across the 1920, 1930 and 1940 US Censuses in Middlesex, Massachusetts (XGBoost, ~Confirmed), with identified parents Anna & Robert — first a son (b.~1909), then head of a 7-person household.
Age 21
b. ~1909
Male
Son
Born: Massachusetts
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Middlesex, Massachusetts |
| Surname | Black |
| Given Name | Robert C. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Irish Free State |
| Additional Details | |
| Occupation | Helper |
| Industry | Truck |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Helper |
| Township / Ward | Arlington Town Part |
| Est. Birth Year | ~1909 |
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.
7 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Robert | Age | Birth yr |
|---|---|---|---|---|
| Edna Black | Daughter | — | 9 | ~1921 |
| Robert Black | Head | — | 43 | ~1887 |
| Anna Black | Other | — | 45 | ~1885 |
| John Black | Son | — | 16 | ~1914 |
| Walter Black | Son | — | 19 | ~1911 |
| James Black | Son | — | 17 | ~1913 |
| Robert Black | Son | — | 21 | ~1909 |
Census Appearances
1920
Middlesex, Massachusetts
Son, age 11
Middlesex, Massachusetts · implied b. ~1909 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Black |
| Given Name | Robert C |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Ireland |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Middlesex, Massachusetts
Son, age 21
Middlesex, Massachusetts · implied b. ~1909 — 7 household members
| Surname | Black |
| Given Name | Robert C. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Irish Free State |
| Occupation | Helper |
| Industry | Truck |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Middlesex-County, Massachusetts
Head, age 32
Middlesex-County, Massachusetts · implied b. ~1908 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Block |
| Given Name | Robert C. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 32 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Arlington town |
| 1935 Residence (County) | Middlesex |
| Occupation | Truck Driver |
| Industry | Transportation |
| Class of Worker | PW |
| Hours Worked | 42 |
| Income (1939) | 1700 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| 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: mother Anna Black (~0.92 confidence) and father Robert Black (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Anna Black
b. ~1885
Source mother
● Household
· direct · ~0.92
Father
Robert Black
b. ~1888
Source father
● Household
· direct · ~0.92
This person
Anchor record
Robert Black
Son · 1930 · age 21 · b. ~1909 · Massachusetts
★ You are viewing this record
Sibling
Edna Black
Sibling · 1930 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Black
Sibling · 1930 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Black
Sibling · 1930 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Walter Black
Sibling · 1930 · age 19
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
1930 US Federal Census — Middlesex, Massachusetts
Open full size
1930 US Federal Census — Middlesex, Massachusetts
Page Contents
50 people indexed on this census page (ia:1930:massachusettscensus00reel914:0246)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Rose | 44 | Wife-H | — | Canada French |
| 2 | Clement J. | 25 | Son | Manager | Massachusetts |
| 3 | Warren A. | 23 | Son | Salesman | Massachusetts |
| 4 | Francis A. | 22 | Daughter | — | Massachusetts |
| 5 | Clotilda Clement | 76 | Mother-in-law | — | Canada French |
| 6 | Jessie Lynds | 57 | Head-H | Sewing | Canada English |
| 7 | Dorothy B. Johnson | 27 | Boarder | Teacher | Massachusetts |
| 8 | Fallon Stanley | 60 | Head | — | New York |
| 9 | Thomas Stanley | 27 | Son | Draftsman | Massachusetts |
| 10 | Arvilla A. Kenny | 35 | Daughter | Machine Operator | Massachusetts |
| 11 | Virginia Kenny | 12 | Granddaughter | — | Massachusetts |
| 12 | Krikor Hulmerian | 30 | Head | Cutter-Mkr | Armenia |
| 13 | Bertad Hulmerian | 32 | Brother | Metal Spinner | Armenia |
| 14 | Virginia Hulmerian | 20 | Sister-in-law | — | Armenia |
| 15 | Mary Hulmerian | 0 | Niece | — | Massachusetts |
| 16 | Marion Hulmerian | 62 | Mother-H | — | Armenia |
| 17 | Antonio Tomasello | 29 | Head | Barber | Italy |
| 18 | Margaret Tomasello | 20 | Wife-H | — | Italy |
| 19 | Salvatore Tomasello | 2 | Son | — | Massachusetts |
| 20 | Joseph A. Garside | 41 | Head | Salesman | Massachusetts |
| 21 | Marion Garside | 40 | Wife-H | — | Canada French |
| 22 | Audrey Garside | 5 | Daughter | — | Massachusetts |
| 23 | Gordon G. Ruggiero | 28 | Boarder | Preacher | Rhode Island |
| 24 | Jackson Wong | 26 | Head-H | Laundry | China |
| 25 | Robert J. Black | 43 | Head | Clerk | Massachusetts |
| 26 | Anna E. Black | 45 | Wife-H | — | Irish Free State |
| 27 | Robert C. Black THIS PERSON | 21 | Son | Helper | Massachusetts |
| 28 | Walter J. Black | 19 | Son | Clerk | Massachusetts |
| 29 | James F. Black | 17 | Son | Shipper | Massachusetts |
| 30 | John J. Black | 16 | Son | — | Massachusetts |
| 31 | Edna M. Black | 9 | Daughter | — | Massachusetts |
| 32 | Herbert A. Gibson | 27 | Head | Mechanic | Massachusetts |
| 33 | Ruth M. Gibson | 27 | Wife-H | — | Massachusetts |
| 34 | Ruth Z. Gibson | 1 | Daughter | — | Massachusetts |
| 35 | Mary E. Gedon | 65 | Mother-in-law | — | Canada English |
| 36 | Joseph W. Moore | 41 | Head | Machinist | Massachusetts |
| 37 | Ruth E. Moore | 46 | Sister | Bookkeeper | Massachusetts |
| 38 | Elizabeth Moore | 75 | Mother-H | — | Massachusetts |
| 39 | Jacob M. Frankel | 40 | Head | Salesman | Russia |
| 40 | Lena Frankel | 36 | Wife-H | — | Russia |
| 41 | Harold Frankel | 18 | Son | — | Massachusetts |
| 42 | Ruth Frankel | 15 | Daughter | — | Massachusetts |
| 43 | Leon Frankel | 11 | Son | — | Massachusetts |
| 44 | Richard Donovan | 46 | Head-H | — | Massachusetts |
| 45 | Francis J. Cameron | 45 | Head | Manager | Scotland |
| 46 | Margaret H. Cameron | 42 | Wife-H | Stenographer | Scotland |
| 47 | William Holt | 20 | Boarder | — | Scotland |
| 48 | Frederick Hill | 24 | Boarder | Carpenter | Scotland |
| 49 | Rennie Murdock | 24 | Boarder | Plumber | Scotland |
| 50 | Francis J. Mclean | 40 | Head | Chauffeur | Massachusetts |
Pedigree Summary
Robert + 4 siblings
Gen 1 · 2 parents
~0.92
Max depth 4 (1900–1950 window)
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1930 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)