RB
Robert Black — 1940 US Census Record
Linked across censuses1940 United States Federal Census · St.-Clair-County, Michigan
Our Model Tree links this Robert Black across the 1930 and 1940 US Censuses in St.-Clair-County, Michigan (XGBoost, ~Confirmed) — first a son (b.~1925), then head of a 10-person household.
Age 15
b. ~1925
Male
Son
Born: Michigan
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | St.-Clair-County, Michigan |
| Surname | Black |
| Given Name | Robert W. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Michigan |
| 1935 Residence (City) | Port Huron City |
| 1935 Residence (County) | St Clair |
| Additional Details | |
| Highest Grade | No 8 |
| 1935 Residence | Same Place |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
| Township / Ward | Port Huron City |
| Est. Birth Year | ~1925 |
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.
10 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Robert | Age | Birth yr |
|---|---|---|---|---|
| Joyce Black | Daughter | — | 14 | ~1926 |
| Delores Black | Daughter | — | 7 | ~1933 |
| Beatrice Black | Daughter | — | 9 | ~1931 |
| Mary Black | Daughter | — | 4 | ~1936 |
| Charlotte Black | Daughter | — | 17 | ~1923 |
| William Black | Head | — | 46 | ~1894 |
| Clifford Black | Son | — | 1 | ~1939 |
| Robert Black | Son | — | 15 | ~1925 |
| Russell Black | Son | — | 11 | ~1929 |
| Emma Black | Spouse | — | 36 | ~1904 |
Census Appearances
1930
St Clair, …
Son, age 5
St Clair, Michigan · implied b. ~1925 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Black |
| Given Name | Robert W |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | Michigan |
| Father's Birthplace | Michigan |
| Mother's Birthplace | Michigan |
| Occupation | none |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
1940
St.-Clair-County, Michigan
Son, age 15
St.-Clair-County, Michigan · implied b. ~1925 — 10 household members
| Surname | Black |
| Given Name | Robert W. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Michigan |
| 1935 Residence (City) | Port Huron City |
| 1935 Residence (County) | St Clair |
| Highest Grade | No 8 |
| 1935 Residence | Same Place |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
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 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Robert Black
Son · 1940 · age 15 · b. ~1925 · Michigan
★ You are viewing this record
Sibling
Charlotte Black
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Beatrice Black
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Clifford Black
Sibling · 1940 · age 1
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Delores Black
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Black
Sibling · 1940 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Russell Black
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joyce Black
Sibling · 1940 · age 14
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 — St.-Clair-County, Michigan
Open full size
1940 US Federal Census — St.-Clair-County, Michigan
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01815-00920)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Anna L. Badgerow | 62 | Wife | — | Michigan |
| 2 | Leslie Badgerow | 26 | Son | Truck Driver | Michigan |
| 3 | Joseph Badgerow | 24 | Son | Laborer | Michigan |
| 4 | Harold F. Patrick | 39 | Head | Laborer | Michigan |
| 5 | Eva M. Patrick | 47 | Wife | — | Michigan |
| 6 | Mary E. Patrick | 65 | Head | — | Ohio |
| 7 | Orlo H. Patrick | 29 | Son | Sailor | Michigan |
| 8 | William D. Black | 46 | Head | Laborer | Michigan |
| 9 | Emma P. Black | 36 | Wife | — | Michigan |
| 10 | Charlotte V. Black | 17 | Daughter | — | Michigan |
| 11 | Robert W. Black THIS PERSON | 15 | Son | — | Michigan |
| 12 | Joyce A. Black | 14 | Daughter | — | Michigan |
| 13 | Russell D. Black | 11 | Son | — | Michigan |
| 14 | Beatrice M. Black | 9 | Daughter | — | Michigan |
| 15 | Delores A. Black | 7 | Daughter | — | Michigan |
| 16 | Mary J. Black | 4 | Daughter | — | Michigan |
| 17 | Clifford S. Black | 1 | Son | — | Michigan |
| 18 | John H. Taylor | 46 | Head | Truck Driver | Michigan |
| 19 | Frances M. Taylor | 39 | Wife | — | Michigan |
| 20 | Robert H. Taylor | 11 | Son | — | Michigan |
| 21 | James W. Taylor | 2 | Son | — | Michigan |
| 22 | Clare M. Ramsdell | 33 | Head | Sailor | Michigan |
| 23 | Beatrice F. Ramsdell | 27 | Wife | — | Canada-French |
| 24 | Richard S. Ramsdell | 3 | Son | — | Wisconsin |
| 25 | Marlene J. Ramsdell | 0 | Daughter | — | Michigan |
| 26 | Ralph L. Price | 37 | Head | — | Pennsylvania |
| 27 | Emma M. Price | 34 | Wife | — | Illinois |
| 28 | Ralph L. Price | 14 | Son | — | Michigan |
| 29 | Eileen C. Price | 10 | Daughter | — | Michigan |
| 30 | Wilfred J. Chapdelaine | 22 | Head | Paper Maker | Michigan |
| 31 | Madeline L. Chapdelaine | 22 | Wife | Baker | Michigan |
| 32 | Albert N. Hasting | 65 | Head | Painter | New York |
| 33 | Florence J. Hasting | 53 | Wife | — | New York |
| 34 | Roger H. Hasting | 19 | Son | Clerk | New York |
| 35 | Marjorie M. Hasting | 17 | Daughter | — | Michigan |
| 36 | John O'Neil | 60 | Head | Oiler | Canada-English |
| 37 | Anna J. O'Neil | 53 | Wife | — | Canada-English |
| 38 | John J. O'Neil | 32 | Son | Oiler | Canada-English |
| 39 | William J. O'Neil | 29 | Son | Laborer | Canada-English |
| 40 | William H. Johnson | 46 | Head | Fireman | Michigan |
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)