JF
John Fischer — 1930 US Census Record
Linked across censuses1930 United States Federal Census · San Diego, California
Our Model Tree links this John Fischer across the 1920 and 1930 US Censuses in San Diego, California (XGBoost, ~Confirmed) — first a head (b.~1881), then head of a 9-person household.
Age 49
b. ~1881
Male
Head
Born: Switzerland
Married
1930 Census Record Details
| Census Year | 1930 |
| Location | San Diego, California |
| Surname | Fischer |
| Given Name | John J |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 49 |
| Marital Status | Married |
| Birthplace | Switzerland |
| Naturalization Status | Alien |
| Year of Immigration | 1904 |
| Age at First Marriage | 32 |
| Father's Birthplace | Switzerland |
| Mother's Birthplace | Switzerland |
| Additional Details | |
| Occupation | gardener |
| Industry | landscape |
| Class of Worker | OA |
| Can Read/Write | Yes |
| Mother Tongue | German |
| Home Owned/Rented | O |
| Home Value / Rent | 1500 |
| Radio Set | R |
| Veteran | No |
| Birth Country | Switzerland |
| Birthplace (normalized) | switzerland |
| Occupation | Gardener |
| Township / Ward | San Diego City Pt Of |
| Est. Birth Year | ~1881 |
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.
9 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Elisa Fischer | Daughter | — | 9 | ~1921 |
| Anna Fischer | Daughter | — | 8 | ~1922 |
| Emma Fischer | Daughter | — | 14 | ~1916 |
| John Fischer | Head | — | 49 | ~1881 |
| Eliza Fischer | Other | — | 48 | ~1882 |
| Felix Fischer | Son | — | 12 | ~1918 |
| Teofel Fischer | Son | — | 13 | ~1917 |
| John Fischer | Son | — | 9 | ~1921 |
| Theodore Fischer | Son | — | 15 | ~1915 |
Census Appearances
1920
San Diego, …
Head, age 39
San Diego, California · implied b. ~1881 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Fisher |
| Given Name | John J |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 39 |
| Marital Status | Married |
| Birthplace | Switzerland |
| Year of Immigration | 1902 |
| Naturalization Status | First papers filed |
| Father's Birthplace | Switzerland |
| Mother's Birthplace | Switzerland |
| Occupation | Laborer |
| Industry | Street Dept |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | German |
| Home Owned/Rented | R |
| Birth Country | Switzerland |
| Birthplace (normalized) | switzerland |
1930
San Diego, …
Head, age 49
San Diego, California · implied b. ~1881 — 9 household members
| Surname | Fischer |
| Given Name | John J |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 49 |
| Marital Status | Married |
| Birthplace | Switzerland |
| Naturalization Status | Alien |
| Year of Immigration | 1904 |
| Age at First Marriage | 32 |
| Father's Birthplace | Switzerland |
| Mother's Birthplace | Switzerland |
| Occupation | gardener |
| Industry | landscape |
| Class of Worker | OA |
| Can Read/Write | Yes |
| Mother Tongue | German |
| Home Owned/Rented | O |
| Home Value / Rent | 1500 |
| Radio Set | R |
| Veteran | No |
| Birth Country | Switzerland |
| Birthplace (normalized) | switzerland |
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 Fischer across 2 US Census years (1920 and 1930) in San Diego, California, using XGBoost record linkage.
Show:
This person
Anchor record
John Fischer
Head · 1930 · age 49 · b. ~1881 · California
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1930 US Federal Census — San Diego, California
Open full size
1930 US Federal Census — San Diego, California
Page Contents
50 people indexed on this census page (ia:1930:californiacensus00reel192:0564)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Doris L Mellinger | 5 | Daughter | None | Iowa |
| 2 | James A Prosser | 59 | Head | Laborer | Iowa |
| 3 | Lizzie Prosser | 59 | wife-H | None | Iowa |
| 4 | Edward Elfers | 27 | Head | Lineman | South Dakota |
| 5 | Myrtle L Elfers | 25 | wife-H | Cashier | California |
| 6 | Claude S Cooke | 50 | Head | Salesman | Missouri |
| 7 | John L Fisher | 35 | Head | Cook | Germany |
| 8 | Marie T Fisher | 41 | wife-H | Checker-Food | Germany |
| 9 | Katherine B Shepard | 64 | Head | None | Canada-Eng |
| 10 | Anthony Oliver | 39 | Head | Spotter | Massachusetts |
| 11 | Flora Oliver | 42 | wife | None | Vermont |
| 12 | June Oliver | 16 | daughter | None | Massachusetts |
| 13 | Everett Oliver | 13 | son | None | Massachusetts |
| 14 | James Svejda | 36 | Head | Shoe Maker | Michigan |
| 15 | Isabella H Svejda | 36 | wife-H | None | Colorado |
| 16 | Walter L Worden | 50 | Head | None | Canada-English |
| 17 | Vera K Worden | 38 | wife-H | None | Colorado |
| 18 | Edwin S Penning | 20 | step son | Salesman | California |
| 19 | Florence E Underwood | 56 | mother-in-law | None | Ohio |
| 20 | Charles J Boone | 61 | Head | None | Kentucky |
| 21 | John J Fischer THIS PERSON | 49 | Head | Gardener | Switzerland |
| 22 | Eliza E Fischer | 48 | wife-H | None | Switzerland |
| 23 | Theodore Fischer | 15 | son | None | California |
| 24 | Teofel Fischer | 13 | son | None | California |
| 25 | Emma M Fischer | 14 | Daughter | None | California |
| 26 | Felix Fischer | 12 | son | None | California |
| 27 | Elisa E Fischer | 9 | Daughter | None | California |
| 28 | John Fischer | 9 | son | None | California |
| 29 | Anna Fischer | 8 | daughter | None | California |
| 30 | Oscar Atall | 53 | Head | None | Iowa |
| 31 | Sarah A Atall | 57 | wife-H | Janitor | Missouri |
| 32 | Marian M Sivrich | 36 | Head | Contractor | Yugoslavia |
| 33 | Eunice D Sivrich | 25 | wife-H | None | Kansas |
| 34 | Marian M Sivrich | 5 | son | None | California |
| 35 | Frank R Formento | 52 | Head | Detective | Louisiana |
| 36 | Roma D Formento | 40 | wife-H | None | Arkansas |
| 37 | Roma A Formento | 8 | daughter | None | California |
| 38 | Letitia R Formento | 5 | daughter | None | California |
| 39 | William H Weed | 80 | Head | Newsboy | Illinois |
| 40 | Nettie E Weed | 70 | wife-H | None | Illinois |
| 41 | George H Dewees | 47 | Head | Laborer | Indiana |
| 42 | Clara M Dewees | 41 | wife-H | None | Indiana |
| 43 | Irene F Dewees | 14 | daughter | None | Washington |
| 44 | Roy A Dewees | 12 | son | Newsboy | Montana |
| 45 | Eleanora S Dewees | 10 | daughter | None | California |
| 46 | Arley Dewees | 8 | son | None | California |
| 47 | Dorothy Dewees | 5 | daughter | None | California |
| 48 | Paul Dewees | 2 | son | None | California |
| 49 | James E Harper | 37 | Head | Chauffeur | Illinois |
| 50 | Christine R Harper | 28 | wife-H | None | Indiana |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1930 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)