JH
John Haas — 1940 US Census Record
Model Tree available1940 United States Federal Census · Alameda-County, California
Our Model Tree links this John Haas across the 1920, 1930 and 1940 US Censuses in Alameda-County, California (XGBoost, ~Confirmed), with identified parents John & John — first a son (b.~1914), then head of a 3-person household.
Age 26
b. ~1914
Male
Son
Born: California
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Alameda-County, California |
| Surname | Haas |
| Given Name | John Jr. |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 26 |
| Marital Status | Single |
| Birthplace | California |
| 1935 Residence (City) | Hayward |
| 1935 Residence (County) | Alameda |
| Additional Details | |
| Occupation | operator |
| Industry | Service Station |
| Class of Worker | OA |
| Hours Worked | 72 |
| Income (1939) | 156 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
| Occupation | Operator |
| Township / Ward | Hayward |
| Est. Birth Year | ~1914 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| John Haas | Son | — | 26 | ~1914 |
| John Haas | Head | — | 51 | ~1889 |
| Grace Haas | Spouse | — | 48 | ~1892 |
Census Appearances
1920
Alameda, California
Son, age 6
Alameda, California · implied b. ~1914 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Haas |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 6 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | California |
| Mother's Birthplace | California |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1930
Alameda, California
Son, age 16
Alameda, California · implied b. ~1914 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Haus |
| Given Name | John Jr |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | California |
| Mother's Birthplace | California |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1940
Alameda-County, California
Son, age 26
Alameda-County, California · implied b. ~1914 — 3 household members
| Surname | Haas |
| Given Name | John Jr. |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 26 |
| Marital Status | Single |
| Birthplace | California |
| 1935 Residence (City) | Hayward |
| 1935 Residence (County) | Alameda |
| Occupation | operator |
| Industry | Service Station |
| Class of Worker | OA |
| Hours Worked | 72 |
| Income (1939) | 156 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| 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 John Haas across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father John Haus (~0.92 confidence) and father John Haas (~0.92 confidence) and father John Haas (~0.92 confidence) and mother Grace Haas (~0.92 confidence) and mother Rose Haas (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
John Haus
b. ~1888
Source father
● Household
· direct · ~0.92
Father
John Haas
b. ~1888
Source father
● Household
· direct · ~0.92
Father
John Haas
b. ~1889
Source father
● Household
· direct · ~0.92
Mother
Grace Haas
b. ~1892
Source mother
● Household
· direct · ~0.92
Mother
Rose Haas
b. ~1891
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Haas
Son · 1940 · age 26 · b. ~1914 · California
★ 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 — Alameda-County, California
Open full size
1940 US Federal Census — Alameda-County, California
Page Contents
36 people indexed on this census page (nara:1940:m-t0627-00185-00483)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Marie Cozzo | 55 | head | Care Taker | Italy |
| 42 | Pete Cozzo | 30 | son | Asst Office Mgr | California |
| 43 | John A. Haas | 51 | head | Electrician | California |
| 44 | Grace Haas | 48 | wife | — | California |
| 45 | John Jr. Haas THIS PERSON | 26 | son | Operator | California |
| 47 | William Baumann | 49 | head | Mining | California |
| 48 | Harry Motes | 57 | head | Mechanic | Greece |
| 49 | Mary Motes | 54 | wife | Laborer | Italy |
| 50 | Laura Motes | 19 | daughter | — | California |
| 51 | Deana Motes | 16 | daughter | — | California |
| 52 | Paul Callas | 40 | head | Confectioner | Greece |
| 53 | Irene Callas | 33 | wife | — | California |
| 54 | John Callas | 16 | son | — | California |
| 55 | Yolanda Canata | 31 | sister-in-law | Saleswoman | California |
| 56 | Marie Comman | 54 | head | Manager | California |
| 57 | Katherine Comman | 82 | mother | — | Switzerland |
| 58 | R. M. Coughlin | 28 | head | Teacher | California |
| 59 | George Bittencourt | 27 | head | Roof Maintenance | California |
| 60 | Clara Bittencourt | 26 | wife | Laborer | California |
| 61 | Paul Sheppard | 33 | head | Salesman | Illinois |
| 62 | Charlotte Sheppard | 28 | wife | — | Kentucky |
| 65 | L. R. Switzer | 55 | head | Owner | West Virginia |
| 66 | Jessie Switzer | 49 | wife | Partner | Kansas |
| 67 | Donald Switzer | 18 | son | — | California |
| 68 | Jean Switzer | 13 | daughter | — | California |
| 69 | Ruth Switzer | 5 | daughter | — | California |
| 70 | Clifford Simmons | 33 | head | Mechanic | Texas |
| 71 | Lois Simmons | 25 | wife | Physical Therapist | California |
| 72 | Dr. W. M. Dicks | 45 | head | Veterinarian | Kansas |
| 73 | Helen Dicks | 39 | wife | — | Illinois |
| 74 | Billy Dicks | 16 | son | — | Kansas |
| 75 | Marilyn Dicks | 13 | daughter | — | Kansas |
| 76 | George Brohan | 22 | head | Clerk | New Jersey |
| 77 | Shirley Brohan | 19 | wife | Stenographer | Nebraska |
| 78 | Otto Lorenz | 66 | head | Buyer & Seller | Germany |
| 79 | Bertha Lorenz | 63 | wife | — | Germany |
Pedigree Summary
John
Gen 1 · 5 parents
~0.92
Max depth 4 (1900–1950 window)
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)