WC
William Cooper — 1940 US Census Record
Linked across censuses1940 United States Federal Census · St.-Clair-County, Michigan
Our Model Tree links this William Cooper across the 1920, 1930 and 1940 US Censuses in St.-Clair-County, Michigan (XGBoost, ~Confirmed) — first a head (b.~1899), then head of a 4-person household.
Age 41
b. ~1899
Male
Head
Born: England
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | St.-Clair-County, Michigan |
| Surname | Cooper |
| Given Name | William |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 41 |
| Marital Status | Married |
| Birthplace | England |
| 1935 Residence (City) | R |
| 1935 Residence (County) | St. Clair |
| Naturalization Status | Naturalized |
| Additional Details | |
| Occupation | Sailor |
| Industry | Great Lakes |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 460 |
| Highest Grade | H 4 |
| 1935 Residence | Michigan |
| Birth Country | England |
| Birthplace (normalized) | england |
| Occupation | Sailor |
| Township / Ward | Algonac |
| Est. Birth Year | ~1899 |
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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| Florence Cooper | Daughter | — | 18 | ~1922 |
| Frances Cooper | Daughter | — | 12 | ~1928 |
| William Cooper | Head | — | 41 | ~1899 |
| Susan Cooper | Spouse | — | 40 | ~1900 |
Census Appearances
1920
St Clair, …
Other, age 21
St Clair, Michigan · implied b. ~1899 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cooper |
| Given Name | William |
| Relationship to Head | Boarder |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | England |
| Year of Immigration | 1914 |
| Naturalization Status | Naturalized |
| Father's Birthplace | England |
| Mother's Birthplace | England |
| Occupation | Sailor |
| Industry | Great Lakes |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Birth Country | England |
| Year of Naturalization | 1919 |
| Birthplace (normalized) | england |
1930
St Clair, …
Head, age 31
St Clair, Michigan · implied b. ~1899 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cooper |
| Given Name | William G |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 31 |
| Marital Status | Married |
| Birthplace | England |
| Naturalization Status | Naturalized |
| Year of Immigration | 1912 |
| Age at First Marriage | 21 |
| Father's Birthplace | England |
| Mother's Birthplace | England |
| Occupation | Engineer |
| Industry | Steamship |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Home Owned/Rented | O |
| Home Value / Rent | 2500 |
| Radio Set | R |
| Birth Country | England |
| Birthplace (normalized) | england |
1940
St.-Clair-County, Michigan
Head, age 41
St.-Clair-County, Michigan · implied b. ~1899 — 4 household members
| Surname | Cooper |
| Given Name | William |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 41 |
| Marital Status | Married |
| Birthplace | England |
| 1935 Residence (City) | R |
| 1935 Residence (County) | St. Clair |
| Naturalization Status | Naturalized |
| Occupation | Sailor |
| Industry | Great Lakes |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 460 |
| Highest Grade | H 4 |
| 1935 Residence | Michigan |
| Birth Country | England |
| Birthplace (normalized) | england |
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 Cooper across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
William Cooper
Head · 1940 · age 41 · b. ~1899 · Michigan
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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-t0627-01815-00188)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Betty Lou Peterson | 5 | Daughter | — | Michigan |
| 2 | Althea Peterson | 1 | Daughter | — | Michigan |
| 3 | Donald Meldrum | 25 | Head | Mechanic | Michigan |
| 4 | Kathaleen Meldrum | 27 | Wife | — | Michigan |
| 5 | Betty Lou Corbit | 7 | Stepdaughter | — | Michigan |
| 6 | Roger Beaulac | 23 | Brother in law | Shipping Clerk | Canada |
| 7 | Irene Beaulac | 20 | Sister in law | — | Michigan |
| 8 | Phillip Beaulac | 2 | Nephew | — | Michigan |
| 9 | Catherine Blauvelt | 62 | Head | — | Michigan |
| 10 | Jamie Hobby | 7 | Grandson | — | Michigan |
| 11 | Walter L. Hill | 54 | Head | Watchman | England |
| 12 | Lizzie Ethel Hill | 57 | Wife | — | Michigan |
| 13 | Eleanor B. Hill | 24 | Daughter | Shipper | Michigan |
| 14 | Milton Leonard Hill | 27 | Son | Wheelsman | Michigan |
| 15 | Merrill Hill | 4 | Grandson | — | Michigan |
| 16 | Gay Ann Hill | 2 | Granddaughter | — | Michigan |
| 17 | — | None | — | — | — |
| 18 | Lloyd Pollard | 40 | Head | Mill Foreman | Tennessee |
| 19 | Mary Pollard | 37 | Wife | — | Kentucky |
| 20 | Judith Pollard | 12 | Daughter | — | Michigan |
| 21 | Joseph Pollard | 1 | Son | — | Michigan |
| 22 | Lenore Foulette | 54 | Head | — | Michigan |
| 23 | Helen Fisher | 62 | Daughter | — | Michigan |
| 24 | Bernard Fisher | 35 | Grandson | Sailor | Michigan |
| 25 | Mrs. Martha Vidette | 52 | Head | — | Michigan |
| 26 | — | None | — | — | — |
| 27 | William Cooper THIS PERSON | 41 | Head | Sailor | England |
| 28 | Susan Cooper | 40 | Wife | — | Michigan |
| 29 | Florence Cooper | 18 | Daughter | Clerk | Michigan |
| 30 | Frances Cooper | 12 | Daughter | — | Michigan |
| 31 | Louis Mattley | 61 | Head | — | Michigan |
| 32 | Jessie Mattley | 57 | Wife | — | Michigan |
| 33 | Frank M. Mason | 64 | Head | — | Michigan |
| 34 | Madeline Mason | 60 | Wife | — | Canada |
| 35 | Charles Montney | 47 | Head | Painter | Michigan |
| 36 | Grace Montney | 43 | Wife | — | Michigan |
| 37 | Carol Montney | 19 | Daughter | Clerk | Michigan |
| 38 | Lincoln Montney | 17 | Son | — | Michigan |
| 39 | Elaine Montney | 13 | Daughter | — | Michigan |
| 40 | Thelma Montney | 11 | Daughter | — | 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)