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Peter Williams — 1940 US Census Record
Linked across censuses1940 United States Federal Census · St.-Clair-County, Michigan
Our Model Tree links this Peter Williams across the 1930 and 1940 US Censuses in St.-Clair-County, Michigan (XGBoost, ~Confirmed) — first a son (b.~1930), then head of a 13-person household.
Age 10
b. ~1930
Male
Son
Born: Michigan
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | St.-Clair-County, Michigan |
| Surname | Williams |
| Given Name | Peter C |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Michigan |
| 1935 Residence (City) | St Clair |
| 1935 Residence (County) | St Clair |
| Additional Details | |
| Highest Grade | No 3 |
| 1935 Residence | Michigan |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
| Township / Ward | Marysville |
| Est. Birth Year | ~1930 |
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.
13 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Peter | Age | Birth yr |
|---|---|---|---|---|
| June Williams | Daughter | — | 12 | ~1928 |
| Harold Williams | Son | — | 17 | ~1923 |
| Kenneth Williams | Son | — | 2 | ~1938 |
| William Williams | Son | — | 3 | ~1937 |
| Madonna Williams | Daughter | — | 5 | ~1935 |
| James Williams | Son | — | ~1940 | |
| John Williams | Head | — | 42 | ~1898 |
| Henrietta Williams | Spouse | — | 35 | ~1905 |
| Joanne Williams | Daughter | — | 7 | ~1933 |
| Peter Williams | Son | — | 10 | ~1930 |
| Virginia Williams | Daughter | — | 13 | ~1927 |
| Viola Williams | Daughter | — | 15 | ~1925 |
| John Williams | Son | — | 16 | ~1924 |
Census Appearances
1930
St Clair, …
Son, age
St Clair, Michigan · implied b. ~1930 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Williams |
| Given Name | Peter |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 0 |
| Marital Status | Single |
| Birthplace | Michigan |
| Father's Birthplace | Michigan |
| Mother's Birthplace | Michigan |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
1940
St.-Clair-County, Michigan
Son, age 10
St.-Clair-County, Michigan · implied b. ~1930 — 13 household members
| Surname | Williams |
| Given Name | Peter C |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Michigan |
| 1935 Residence (City) | St Clair |
| 1935 Residence (County) | St Clair |
| Highest Grade | No 3 |
| 1935 Residence | Michigan |
| 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 Peter Williams across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Peter Williams
Son · 1940 · age 10 · b. ~1930 · Michigan
★ You are viewing this record
Sibling
Kenneth Williams
Sibling · 1940 · age 2
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Williams
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Virginia Williams
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Viola Williams
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Madonna Williams
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Williams
Sibling · 1940 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joanne Williams
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Williams
Sibling · 1940 · age
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
June Williams
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Harold Williams
Sibling · 1940 · age 17
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-t0627-01815-00776)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Esther Licker | 25 | Wife | — | Pennsylvania |
| 2 | John J Williams | 42 | Head | Plasterer | Michigan |
| 3 | Henrietta Williams | 35 | Wife | — | Michigan |
| 4 | Harold E Williams | 17 | Son | Helper | Michigan |
| 5 | John P Williams | 16 | Son | — | Michigan |
| 6 | Viola J Williams | 15 | Daughter | — | Michigan |
| 7 | Virginia C Williams | 13 | Daughter | — | Michigan |
| 8 | June A Williams | 12 | Daughter | — | Michigan |
| 9 | Peter C Williams THIS PERSON | 10 | Son | — | Michigan |
| 10 | Joanne Williams | 7 | Daughter | — | Michigan |
| 11 | Madonna J Williams | 5 | Daughter | — | Michigan |
| 12 | William J Williams | 3 | Son | — | Michigan |
| 13 | Kenneth A Williams | 2 | Son | — | Michigan |
| 14 | James L Williams | 0 | Son | — | Michigan |
| 15 | Myron W Mills | 74 | Head | For Self | Michigan |
| 16 | Mabel Mills | 70 | Wife | — | Michigan |
| 17 | Mary Elizabeth Mills | 44 | Daughter | Clerical | Michigan |
| 18 | Robert E Mills | 19 | Son | Clerical | Michigan |
| 19 | Earl B Kendall | 51 | Head | Assembler | Michigan |
| 20 | Alfred J Hartman | 32 | Head | Fireman | Michigan |
| 21 | Frances Hartman | 31 | Wife | — | Pennsylvania |
| 22 | James E Hartman | 2 | Son | — | Michigan |
| 23 | James Hartman | 72 | Head | — | Canada-English |
| 24 | Evelyn Fretenborough | 42 | Housekeeper | Housekeeper | Michigan |
| 25 | Dorothy E Fretenborough | 17 | Daughter | — | Michigan |
| 26 | Martha L Fretenborough | 15 | Daughter | — | Michigan |
| 27 | Marion L Fretenborough | 13 | Daughter | — | Michigan |
| 28 | William R Fretenborough | 12 | Son | — | Michigan |
| 29 | Harriet Hoffman | 73 | Head | — | Michigan |
| 30 | Conrad Schonstheimer | 39 | Son in Law | Sales | New York |
| 31 | Alberta H B Schonstheimer | 34 | Daughter | Bookkeeper | Michigan |
| 32 | Lillian Campbell | 64 | Housekeeper | Housekeeper | Canada-English |
| 33 | Victor Nelson | 67 | Head | — | Finland |
| 34 | — | None | — | — | — |
| 35 | Lewis J Frazer | 22 | Head | Laborer | Alabama |
| 36 | Rosetta M Frazer | 21 | Wife | — | Michigan |
| 37 | Gwendolyn S Frazer | 1 | Daughter | — | Michigan |
| 38 | Richard L Frazer | 0 | Son | — | Michigan |
| 39 | Alveretta Wolfe | 48 | Mother in Law | Housework | Michigan |
| 40 | Richard E Dunn | 35 | Head | Decorator | Washington |
Related Census Records
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)