JS
John Snyder — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Santa-Clara-County, California
Our Model Tree links this John Snyder across the 1920, 1930 and 1940 US Censuses in Santa-Clara-County, California (XGBoost, ~Confirmed) — first a head (b.~1868), then head of a 4-person household.
Age 72
b. ~1868
Male
Head
Born: Indiana
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Santa-Clara-County, California |
| Surname | Snyder |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 72 |
| Marital Status | Married |
| Birthplace | Indiana |
| 1935 Residence (City) | Palo Alto |
| 1935 Residence (County) | Santa Clara |
| Additional Details | |
| Occupation | Professor Zoology Emeritus |
| Industry | University |
| Class of Worker | PW |
| Income (1939) | 0 |
| Highest Grade | C 4 |
| 1935 Residence | Same place |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
| Occupation | Professor Zoology Emeritus |
| Township / Ward | Palo Alto |
| Est. Birth Year | ~1868 |
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 John | Age | Birth yr |
|---|---|---|---|---|
| Evelyn Snyder | Daughter | — | 34 | ~1906 |
| John Snyder | Head | — | 72 | ~1868 |
| Cedric Snyder | Son | — | 29 | ~1911 |
| Frances Snyder | Spouse | — | 67 | ~1873 |
Census Appearances
1920
Santa Clara, …
Head, age 52
Santa Clara, California · implied b. ~1868 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Snyder |
| Given Name | John O. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 52 |
| Marital Status | Married |
| Birthplace | Indiana |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Ohio |
| Occupation | Teacher |
| Industry | University |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Home Owned/Rented | O |
| Home Free/Mortgaged | F |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
1930
Santa Clara, …
Head, age 62
Santa Clara, California · implied b. ~1868 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Snyder |
| Given Name | John O. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 62 |
| Marital Status | Married |
| Birthplace | Indiana |
| Age at First Marriage | 32 |
| Father's Birthplace | New York |
| Mother's Birthplace | Pennsylvania |
| Occupation | Professor |
| Industry | University |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Home Value / Rent | 5000 |
| Radio Set | R |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
1940
Santa-Clara-County, California
Head, age 72
Santa-Clara-County, California · implied b. ~1868 — 4 household members
| Surname | Snyder |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 72 |
| Marital Status | Married |
| Birthplace | Indiana |
| 1935 Residence (City) | Palo Alto |
| 1935 Residence (County) | Santa Clara |
| Occupation | Professor Zoology Emeritus |
| Industry | University |
| Class of Worker | PW |
| Income (1939) | 0 |
| Highest Grade | C 4 |
| 1935 Residence | Same place |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
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 Snyder across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Snyder
Head · 1940 · age 72 · b. ~1868 · 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 — 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-t0627-00336-00525)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Brigitte Frankel | 11 | Daughter | — | Germany |
| 42 | Harriet Carrick | 17 | Servant | Servant | California |
| 43 | Ida Aldroyd | 85 | Head | Curator | Michigan |
| 44 | Earl Hoover | 26 | Lodger | Accountant | California |
| 45 | Dorothy Hoover | 25 | Wife | — | Utah |
| 46 | Albert Whitaker | 62 | Head | Professor Economics | Pennsylvania |
| 47 | Mary Whitaker | 65 | Wife | — | California |
| 48 | Vallentino Velasco | 25 | Servant | Houseboy | Philippines |
| 49 | John Snyder THIS PERSON | 72 | Head | Professor Zoology Emeritus | Indiana |
| 50 | Frances Snyder | 67 | Wife | — | California |
| 51 | Evelyn Snyder | 34 | Daughter | Teacher | California |
| 52 | Cedric Snyder | 29 | Son | — | California |
| 53 | Jean Clark | 72 | Head | — | Illinois |
| 54 | Helen Clark | 46 | Daughter | — | California |
| 55 | George Price | 79 | Head | Professor Zoology Emeritus | Indiana |
| 56 | Edith Price | 69 | Wife | — | Indiana |
| 57 | Oliver Johnston | 73 | Head | Professor Emeritus Languages | Louisiana |
| 58 | Florence Johnston | 72 | Wife | — | Illinois |
| 59 | Alice Hays | 65 | Head | Librarian | New York |
| 60 | James Hays | 93 | Father | — | Pennsylvania |
| 61 | Addie Leader | 63 | Nurse | Practical Nurse | Minnesota |
| 62 | Minna Stillman | 59 | Head | Librarian | California |
| 63 | Edwin T. Coman | 36 | Head | Librarian | Washington |
| 64 | Evelyn Coman | 36 | Wife | — | Kansas |
| 65 | Elma Henricksen | 20 | Servant | Maid | Wisconsin |
| 66 | Jessie Eichelberger | 50 | Head | Lodge Keeper | Wyoming |
| 67 | Frances Eichelberger | 23 | Daughter | — | Washington |
| 68 | Kurt Reinhardt | 43 | Head | German Professor | Germany |
| 69 | Bertha Reinhardt | 37 | Wife | — | Switzerland |
| 70 | Leroy Longley | 23 | Lodger | — | Pennsylvania |
| 71 | Lowell Turrentine | 46 | Head | Professor Law | New York |
| 72 | Madeline Turrentine | 42 | Wife | — | Colorado |
| 73 | Ernest Erwin | 50 | Head | Controller | California |
| 74 | Helen Erwin | 43 | Wife | — | California |
| 75 | Mary Anna Erwin | 16 | Daughter | — | California |
| 76 | Harriet Brown | 34 | Servant | Servant | Arkansas |
| 77 | Boynton Green | 45 | Head | Professor Mechanical Engineering | New York |
| 78 | Elizabeth Green | 37 | Wife | — | Washington |
| 79 | Nancy Green | 10 | Daughter | — | California |
| 80 | Barbara Green | 7 | Daughter | — | 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)