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John Silva — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Alameda, California
Our Model Tree links this John Silva across the 1920, 1930 and 1940 US Censuses in Alameda, California (XGBoost, ~Confirmed) — first a head (b.~1891), then head of a 4-person household.
Age 39
b. ~1891
Male
Head
Born: Portugal
Married
1930 Census Record Details
| Census Year | 1930 |
| Location | Alameda, California |
| Surname | Silva |
| Given Name | John P |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 39 |
| Marital Status | Married |
| Birthplace | Portugal |
| Naturalization Status | Naturalized |
| Year of Immigration | 1911 |
| Age at First Marriage | 27 |
| Father's Birthplace | Portugal |
| Mother's Birthplace | Portugal |
| Additional Details | |
| Occupation | Manager |
| Industry | Creamery |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | Portuguese |
| Home Owned/Rented | O |
| Home Value / Rent | 4500 |
| Radio Set | R |
| Veteran | No |
| Birth Country | Portugal |
| Birthplace (normalized) | portugal |
| Occupation | Manager |
| Township / Ward | Berkeley City |
| Est. Birth Year | ~1891 |
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 1930 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Lucille Silva | Daughter | — | 11 | ~1919 |
| John Silva | Head | — | 39 | ~1891 |
| Emily Silva | Daughter | — | 10 | ~1920 |
| Marion Silva | Other | — | 38 | ~1892 |
Census Appearances
1920
Merced, California
Head, age 29
Merced, California · implied b. ~1891 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Silva |
| Given Name | John P |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 29 |
| Marital Status | Married |
| Birthplace | Portugal |
| Year of Immigration | 1911 |
| Naturalization Status | First papers filed |
| Father's Birthplace | Portugal |
| Mother's Birthplace | Portugal |
| Occupation | Manager |
| Industry | Dairy Farm |
| Class of Worker | OA |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Portuguese |
| Home Owned/Rented | R |
| Birth Country | Portugal |
| Birthplace (normalized) | portugal |
1930
Alameda, California
Head, age 39
Alameda, California · implied b. ~1891 — 4 household members
| Surname | Silva |
| Given Name | John P |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 39 |
| Marital Status | Married |
| Birthplace | Portugal |
| Naturalization Status | Naturalized |
| Year of Immigration | 1911 |
| Age at First Marriage | 27 |
| Father's Birthplace | Portugal |
| Mother's Birthplace | Portugal |
| Occupation | Manager |
| Industry | Creamery |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | Portuguese |
| Home Owned/Rented | O |
| Home Value / Rent | 4500 |
| Radio Set | R |
| Veteran | No |
| Birth Country | Portugal |
| Birthplace (normalized) | portugal |
1940
Contra-Costa-County, California
Other, age 48
Contra-Costa-County, California · implied b. ~1892 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Silva |
| Given Name | John P |
| Relationship to Head | Lodger |
| Sex | M |
| Color / Race | White |
| Age | 48 |
| Marital Status | Divorced |
| Birthplace | Portugal |
| 1935 Residence (City) | Berkeley |
| 1935 Residence (County) | Alameda |
| Naturalization Status | Naturalized |
| Occupation | Foreman |
| Industry | Creamery |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 516 |
| Highest Grade | No 7 |
| 1935 Residence | Calif |
| Birth Country | Portugal |
| Birthplace (normalized) | portugal |
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 Silva across 3 US Census years (1920, 1930 and 1940) in 3 locations, using XGBoost record linkage.
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This person
Anchor record
John Silva
Head · 1930 · age 39 · b. ~1891 · 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 — Alameda, California
Open full size
1930 US Federal Census — Alameda, California
Page Contents
50 people indexed on this census page (ia:1930:californiacensus00reel111:0595)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Myron C Murdock | 23 | Head | Laborer | California |
| 2 | Marie C Murdock | 21 | Wife-H | — | Kansas |
| 3 | Inez C Murdock | 1 | Daughter | — | California |
| 4 | Edna L Saulsbury | 17 | Sister-in-law | Housework | Kansas |
| 5 | Albert B Quackenbush | 73 | Head | Carpenter | Canada English |
| 6 | Eva J Quackenbush | 64 | Wife-H | — | Delaware |
| 7 | Joseph F Alves | 37 | Head | Laborer | Austria |
| 8 | Frances F Alves | 32 | Wife-H | — | Austria |
| 9 | Marie A Alves | 9 | Daughter | — | Austria |
| 10 | John F Alves | 4 | Son | — | California |
| 11 | James J Olsen | 68 | Head | — | Denmark |
| 12 | Line Olsen | 65 | Wife-H | — | Denmark |
| 13 | John P Silva THIS PERSON | 39 | Head | Manager | Portugal |
| 14 | Marion S Silva | 38 | Wife-H | — | Portugal |
| 15 | Lucille Silva | 11 | Daughter | — | California |
| 16 | Emily Silva | 10 | Daughter | — | California |
| 17 | Joe P Silva | 45 | Head | Stevedore | Portugal |
| 18 | Mary Silva | 39 | Wife-H | — | Portugal |
| 19 | Minnie Silva | 23 | Daughter | Milliner | California |
| 20 | May Silva | 21 | Daughter | Stenographer | California |
| 21 | William Silva | 18 | Son | — | California |
| 22 | Florence Silva | 15 | Daughter | — | California |
| 23 | Gerald Silva | 12 | Son | — | California |
| 24 | John F Concello | 42 | Head | Officer | Portugal |
| 25 | Mariana Concello | 32 | Wife-H | — | Portugal |
| 26 | Walter Concello | 6 | Son | — | California |
| 27 | Frank Barbosa | 34 | Boarder | Laborer | Portugal |
| 28 | Manuel Dias | 57 | Head | Laborer | Portugal |
| 29 | Rosa Dias | 53 | Wife-H | — | Portugal |
| 30 | Joseph M Borba | 63 | Head | Whaler | Portugal |
| 31 | Anna R Borba | 53 | Wife-H | — | Portugal |
| 32 | Mary Borba | 25 | Daughter | Spooler | California |
| 33 | Virginia Borba | 18 | Daughter | Bookkeeper | California |
| 34 | George J Borba | 16 | Son | — | California |
| 35 | Edward F Borba | 10 | Son | — | California |
| 36 | Manuel Silva | 44 | Head | Chauffeur | Portugal |
| 37 | Marion Silva | 34 | Wife-H | — | Portugal |
| 38 | Helen S Silva | 15 | Daughter | — | California |
| 39 | Richard Silva | 12 | Son | — | California |
| 40 | Charles E Warner | 54 | Head | Laborer | California |
| 41 | Mary Warner | 45 | Wife-H | — | California |
| 42 | Lou E Donaldson | 65 | Head | Painter | Missouri |
| 43 | Sophia J Donaldson | 72 | Wife-H | — | Missouri |
| 44 | Delia M Vucin | 35 | Daughter-H | — | Washington |
| 45 | Forest Donaldson | 12 | Grandson | — | California |
| 46 | Barick Conen | 31 | Head | Miller | Germany |
| 47 | Karl Schigerder | 33 | Roomer | Miller | Germany |
| 48 | Egus Albo | 34 | Head | Peddler | Italy |
| 49 | Lena M Albo | 24 | Wife-H | — | California |
| 50 | Judith Albo | 2 | Daughter | — | California |
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)