WJ
William Jensen — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Santa-Clara-County, California
Our Model Tree links this William Jensen across the 1930 and 1940 US Censuses in Santa-Clara-County, California (XGBoost, ~Confirmed) — first a son (b.~1926), then head of a 11-person household.
Age 14
b. ~1926
Male
Son
Born: California
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Santa-Clara-County, California |
| Surname | Jensen |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | California |
| 1935 Residence (City) | Santa Clara |
| Additional Details | |
| Hours Worked | 0 |
| Income (1939) | 0 |
| Highest Grade | No 7 |
| 1935 Residence | California |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
| Township / Ward | San Jose Township |
| Est. Birth Year | ~1926 |
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.
11 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| Bernice Jensen | Daughter | — | 9 | ~1931 |
| Peggy Jensen | Daughter | — | 10 | ~1930 |
| William Jensen | Son | — | 14 | ~1926 |
| John Jensen | Head | — | 47 | ~1893 |
| Earl Jensen | Son | — | 11 | ~1929 |
| Sarah Jensen | Spouse | — | 34 | ~1906 |
| Juanita Jensen | Daughter | — | 6 | ~1934 |
| Lawrence Jensen | Son | — | 1 | ~1939 |
| Violet Jensen | Daughter | — | 13 | ~1927 |
| Leroy Jensen | Son | — | 5 | ~1935 |
| Thelma Jensen | Daughter | — | 15 | ~1925 |
Census Appearances
1930
Santa Clara, …
Son, age 4
Santa Clara, California · implied b. ~1926 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Jensen |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | Denmark |
| Mother's Birthplace | California |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1940
Santa-Clara-County, California
Son, age 14
Santa-Clara-County, California · implied b. ~1926 — 11 household members
| Surname | Jensen |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | California |
| 1935 Residence (City) | Santa Clara |
| Hours Worked | 0 |
| Income (1939) | 0 |
| Highest Grade | No 7 |
| 1935 Residence | California |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
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 Jensen across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
William Jensen
Son · 1940 · age 14 · b. ~1926 · California
★ You are viewing this record
Sibling
Leroy Jensen
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Violet Jensen
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thelma Jensen
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lawrence Jensen
Sibling · 1940 · age 1
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Bernice Jensen
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Peggy Jensen
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Earl Jensen
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Juanita Jensen
Sibling · 1940 · age 6
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 — Santa-Clara-County, California
Open full size
1940 US Federal Census — Santa-Clara-County, California
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00339-00608)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Rafael Rivas | 28 | Head | Laborer | Mexico |
| 42 | Amanda Rivas | 29 | Wife | — | Mexico |
| 43 | Amanda M Rivas | 7 | Daughter | — | California |
| 44 | Ernest Rivas | 5 | Son | — | California |
| 45 | Rafael Jr Rivas | 2 | Son | — | California |
| 46 | Dora C Rivas | 3 | Daughter | — | California |
| 47 | Manuel Del Valle | 31 | Head | Laborer | Mexico |
| 48 | Benita Del Valle | 20 | Wife | — | Arizona |
| 49 | Mary Helen Del Valle | 3 | Daughter | — | California |
| 50 | Apolonia Del Valle | 56 | Mother | — | Mexico |
| 51 | Rachael Gianotta | 38 | Head | Ranch Owner | California |
| 52 | John Gianotta | 10 | Son | — | California |
| 53 | Carmel Gianotta | 8 | Daughter | — | California |
| 54 | Albert Bracamonte | 16 | Lodger | — | California |
| 55 | Tony Chai | 29 | Head | Laborer | Hawaii |
| 56 | Lola Millie Kiapu | 35 | Lodger | Laborer | Hawaii |
| 57 | John L Jensen | 47 | Head | Owner | Denmark |
| 58 | Sarah Jensen | 34 | Wife | — | California |
| 59 | Thelma Jensen | 15 | Daughter | — | California |
| 60 | William Jensen THIS PERSON | 14 | Son | — | California |
| 61 | Violet Jensen | 13 | Daughter | — | California |
| 62 | Earl Jensen | 11 | Son | — | California |
| 63 | Peggy Jensen | 10 | Daughter | — | California |
| 64 | Bernice Jensen | 9 | Daughter | — | California |
| 65 | Juanita Jensen | 6 | Daughter | — | California |
| 66 | Leroy Jensen | 5 | Son | — | California |
| 67 | Lawrence Jensen | 1 | Son | — | California |
| 68 | Mary Avila | 69 | Head | Ranch Owner | Azores |
| 69 | Joseph Avila | 34 | Son | Laborer | California |
| 70 | Margaret Avila | 29 | Daughter | Cannery Wkr | California |
| 71 | Helen Avila | 20 | Daughter | Beauty Operator | California |
| 72 | Manuel J Roari | 54 | Head | Rancher | Portugal |
| 73 | Mary Roari | 49 | Wife | — | Portugal |
| 74 | Mabel Roari | 19 | Daughter | — | California |
| 75 | Emma Roari | 15 | Daughter | — | California |
| 76 | Bernice Roari | 13 | Daughter | — | California |
| 77 | Herbert Menzes | 61 | Head | Rancher | Canada |
| 78 | Clair Stearns | 34 | Head | Carpenter | California |
| 79 | Bessie Stearns | 27 | Wife | — | Oregon |
| 80 | Fellow Stearns | 4 | Son | — | California |
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)