WD
William Dean — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Mason-County, Illinois
Our Model Tree links this William Dean across the 1920, 1930 and 1940 US Censuses in Mason-County, Illinois (XGBoost, ~Confirmed) — first a head (b.~1874), then head of a 4-person household.
Age 66
b. ~1874
Male
Head
Born: Missouri
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Mason-County, Illinois |
| Surname | Dean |
| Given Name | William |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 66 |
| Marital Status | Married |
| Birthplace | Missouri |
| 1935 Residence (City) | San Jose |
| 1935 Residence (County) | Mason |
| Additional Details | |
| Occupation | Farming |
| Industry | Farm |
| Class of Worker | OA |
| Hours Worked | 40 |
| Income (1939) | 0 |
| Highest Grade | No 3 |
| 1935 Residence | Illinois |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
| Occupation | Farming |
| Township / Ward | Allens Grove |
| Est. Birth Year | ~1874 |
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 |
|---|---|---|---|---|
| Josephine Dean | Daughter | — | 32 | ~1908 |
| William Dean | Head | — | 66 | ~1874 |
| Donald Buss | Other | — | 11 | ~1929 |
| Lula Dean | Spouse | — | 60 | ~1880 |
Census Appearances
1920
Mason, Illinois
Head, age 46
Mason, Illinois · implied b. ~1874 — 11 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Dean |
| Given Name | William |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 46 |
| Marital Status | Married |
| Birthplace | Missouri |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Indiana |
| Occupation | Farmer |
| Industry | General farm |
| Class of Worker | Em |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Home Owned/Rented | O |
| Home Free/Mortgaged | M |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
1930
Mason, Illinois
Head, age 56
Mason, Illinois · implied b. ~1874 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Dean |
| Given Name | William |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 56 |
| Marital Status | Married |
| Birthplace | Missouri |
| Age at First Marriage | 21 |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Indiana |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | VVVV |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | Un |
| Veteran | No |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
1940
Mason-County, Illinois
Head, age 66
Mason-County, Illinois · implied b. ~1874 — 4 household members
| Surname | Dean |
| Given Name | William |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 66 |
| Marital Status | Married |
| Birthplace | Missouri |
| 1935 Residence (City) | San Jose |
| 1935 Residence (County) | Mason |
| Occupation | Farming |
| Industry | Farm |
| Class of Worker | OA |
| Hours Worked | 40 |
| Income (1939) | 0 |
| Highest Grade | No 3 |
| 1935 Residence | Illinois |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
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 Dean across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
William Dean
Head · 1940 · age 66 · b. ~1874 · Illinois
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Mason-County, Illinois
Open full size
1940 US Federal Census — Mason-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00855-00021)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Sena Piers | 59 | Wife | Housewife | Wisconsin |
| 42 | John Hebel | 70 | Head | Farming | Illinois |
| 43 | Ester Hebel | 37 | Daughter | Housework | Iowa |
| 44 | Raymond Piers | 31 | Head | Farming | Illinois |
| 45 | Emma Piers | 35 | Wife | Housewife | Illinois |
| 46 | Ruth Piers | 9 | Daughter | — | Illinois |
| 47 | Robert Piers | 4 | Son | — | Illinois |
| 48 | Donald Piers | 3 | Son | — | Illinois |
| 49 | Emerson Leinweber | 34 | Head | Farming | Illinois |
| 50 | Lorene Leinweber | 35 | Wife | Farming | Illinois |
| 51 | Emerson Leinweber | 14 | Son | New Worker | Illinois |
| 52 | Ruth Leinweber | 5 | Daughter | — | Illinois |
| 53 | Eicke Obermache | 56 | Head | Farming | Illinois |
| 54 | Lizzie Obermache | 58 | Sister | Farmwork | Illinois |
| 55 | Maggie Obermache | 54 | Sister | Farmwork | Illinois |
| 56 | Emma Pantila | 45 | Head | Housewife | Missouri |
| 57 | Eldred Pantila | 27 | Son | Farming | Illinois |
| 58 | Evelyn Pantila | 21 | Daughter | Helper (Housewife) | Illinois |
| 59 | Louise Pantila | 7 | Daughter | — | Illinois |
| 60 | Anna Pantila | 2 | Daughter | — | Illinois |
| 61 | William Dean THIS PERSON | 66 | Head | Farming | Missouri |
| 62 | Lula Dean | 60 | Wife | Housewife | Illinois |
| 63 | Josephine Dean | 32 | Daughter | Housework | Illinois |
| 64 | Donald Buss | 11 | Grandson | — | Illinois |
| 65 | Burrel Dean | 24 | Head | Farmhelp | Illinois |
| 66 | Mildred Dean | 22 | Wife | Housework | Illinois |
| 67 | Deloris Dean | 2 | Daughter | — | Illinois |
| 68 | Clarence Schmidt | 29 | Head | Farming | Illinois |
| 69 | Marjorie Schmidt | 22 | Wife | Housework | Illinois |
| 70 | Vera Margaret Schmidt | 1 | Daughter | — | Illinois |
| 71 | William Leinweber | 67 | Head | Farming | Illinois |
| 72 | Nancy Leinweber | 56 | Wife | Housewife | Illinois |
| 73 | Albert Press | 74 | Head | Farming | Germany |
| 74 | Helen Press | 42 | Daughter | Housework | Illinois |
| 75 | Fred Reed | 36 | Head | Farming | Illinois |
| 76 | Mildred Reed | 32 | Wife | Housewife | Illinois |
| 77 | Fred Reed | 14 | Son | New Worker | Illinois |
| 78 | Kenneth Reed | 9 | Son | — | Illinois |
| 79 | Harold Palmer | 27 | Head | Farming | Illinois |
| 80 | Ester Palmer | 26 | Wife | Housewife | Illinois |
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)