WC
William Clarke — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Grant-County, Wisconsin
Our Model Tree links this William Clarke across the 1930 and 1940 US Censuses in Grant-County, Wisconsin (XGBoost, ~Confirmed) — first a son (b.~1930), then head of a 8-person household.
Age 10
b. ~1930
Male
Son
Born: Wisconsin
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Grant-County, Wisconsin |
| Surname | Clarke |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Wisconsin |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Grant Co |
| Additional Details | |
| Industry | 0 |
| Class of Worker | 0 |
| Highest Grade | No 4 |
| 1935 Residence | Wis |
| Birth State | Wisconsin |
| Birth Country | United States |
| Birthplace (normalized) | wisconsin |
| Township / Ward | Platteville City |
| 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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| Earnest Clarke | Head | — | 52 | ~1888 |
| James Clarke | Son | — | 14 | ~1926 |
| Kenneth Clarke | Son | — | 11 | ~1929 |
| Helen Clarke | Spouse | — | 44 | ~1896 |
| John Clarke | Son | — | 16 | ~1924 |
| Donald Clarke | Son | — | 21 | ~1919 |
| Robert Clarke | Son | — | 17 | ~1923 |
| William Clarke | Son | — | 10 | ~1930 |
Census Appearances
1930
Grant, Wisconsin
Son, age
Grant, Wisconsin · implied b. ~1930 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Clark |
| Given Name | William S. |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 0 |
| Marital Status | Single |
| Birthplace | Wisconsin |
| Father's Birthplace | Canada English |
| Mother's Birthplace | Wisconsin |
| Birth State | Wisconsin |
| Birth Country | United States |
| Birthplace (normalized) | wisconsin |
1940
Grant-County, Wisconsin
Son, age 10
Grant-County, Wisconsin · implied b. ~1930 — 8 household members
| Surname | Clarke |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Wisconsin |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Grant Co |
| Industry | 0 |
| Class of Worker | 0 |
| Highest Grade | No 4 |
| 1935 Residence | Wis |
| Birth State | Wisconsin |
| Birth Country | United States |
| Birthplace (normalized) | wisconsin |
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 William Clarke across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
William Clarke
Son · 1940 · age 10 · b. ~1930 · Wisconsin
★ You are viewing this record
Sibling
Donald Clarke
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Clarke
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Clarke
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Clarke
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Kenneth Clarke
Sibling · 1940 · age 11
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 — Grant-County, Wisconsin
Open full size
1940 US Federal Census — Grant-County, Wisconsin
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-04481-00888)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Anna Olmstead | 60 | Wife | — | Wisconsin |
| 2 | Frank C. Olmstead | 65 | Head | Drayman | Wisconsin |
| 3 | Emma Olmstead | 61 | Wife | — | Wisconsin |
| 4 | Milton E. Sprink | 38 | Head | Attendant | Wisconsin |
| 5 | Bessie P. Sprink | 39 | Wife | — | California |
| 6 | Wm. J. Mcnaughton | 54 | Head | Evangelist | Canada |
| 7 | Florence Mcnaughton | 53 | Wife | — | Minnesota |
| 8 | Ruth Mcnaughton | 23 | daughter | Teacher | Minnesota |
| 9 | Grace Mcnaughton | 19 | daughter | — | Minnesota |
| 10 | Faith Mcnaughton | 17 | daughter | — | Minnesota |
| 11 | Margaret Mcnaughton | 16 | daughter | — | Minnesota |
| 12 | Harry L. Smith | 59 | Head | Traveler | Illinois |
| 13 | Maud E. Smith | 54 | Wife | — | California |
| 14 | Verna May Smith | 15 | daughter | — | Wisconsin |
| 15 | Earnest E. Clarke | 52 | Head | Instructor | Canada |
| 16 | Helen E. Clarke | 44 | Wife | — | Illinois |
| 17 | Donald Clarke | 21 | Son | — | Wisconsin |
| 18 | Robert Clarke | 17 | Son | — | Wisconsin |
| 19 | John Clarke | 16 | Son | — | Wisconsin |
| 20 | James Clarke | 14 | Son | — | Wisconsin |
| 21 | Kenneth Clarke | 11 | Son | — | Wisconsin |
| 22 | William Clarke THIS PERSON | 10 | Son | — | Wisconsin |
| 23 | Herbert C. Steffens | 35 | Head | Asst Cashier | Wisconsin |
| 24 | Georgia Steffens | 29 | Wife | — | Illinois |
| 25 | Marilyn Steffens | 5 | daughter | — | Wis |
| 26 | Gretchen Steffens | 2 | daughter | — | Wis |
| 27 | Hyman Kaufman | 54 | Head | Purch Agent | Germany |
| 28 | Arthur Kaufman | 41 | Son | Proprietor | Illinois |
| 29 | Walter Kaufman | 37 | Son | Salesman | S. Dakota |
| 30 | Bertha Kaufman | 24 | daughter | — | Minnesota |
| 31 | Edith Stanton | 18 | Maid | Maid | Wisconsin |
| 32 | Thomas H. Wunderland | 69 | Head | — | Wisconsin |
| 33 | Agnes Wunderland | 65 | Sister | — | Wisconsin |
| 34 | Charles Wunderland | 57 | Cousin | — | Wisconsin |
| 35 | Bert M. Carlson | 48 | Head | Music Instructor | Minnesota |
| 36 | Mabel Carlson | 40 | Wife | — | N. Dakota |
| 37 | Betty Carlson | 10 | daughter | — | Wisconsin |
| 38 | Shirley Carlson | 4 | daughter | — | Wisconsin |
| 39 | Roy Heinrichs | 39 | Head | Electrical Wirer | Wisconsin |
| 40 | Mary Heinrichs | 31 | Wife | — | Wisconsin |
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)