JL
John Lake — 1930 US Census Record
Linked across censuses1930 United States Federal Census · San Francisco, California
Our Model Tree links this John Lake across the 1930 and 1940 US Censuses in San Francisco, California (XGBoost, ~Confirmed) — first a head (b.~1893), then head of a 3-person household.
Age 37
b. ~1893
Male
Head
Born: England
Married
1930 Census Record Details
| Census Year | 1930 |
| Location | San Francisco, California |
| Surname | Lake |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 37 |
| Marital Status | Married |
| Birthplace | England |
| Naturalization Status | First papers filed |
| Year of Immigration | 1926 |
| Age at First Marriage | 31 |
| Father's Birthplace | England |
| Mother's Birthplace | England |
| Additional Details | |
| Occupation | Shipwright |
| Industry | Navy Yard |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Home Owned/Rented | R |
| Home Value / Rent | 35.00 |
| Radio Set | R |
| Birth Country | England |
| Birthplace (normalized) | england |
| Occupation | Shipwright |
| Township / Ward | San Francisco |
| Est. Birth Year | ~1893 |
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 1930 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| John Lake | Head | — | 37 | ~1893 |
| Blanche Lake | Spouse | — | 32 | ~1898 |
| John Lake | Son | — | 4 | ~1926 |
Census Appearances
1930
San Francisco, …
Head, age 37
San Francisco, California · implied b. ~1893 — 3 household members
| Surname | Lake |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 37 |
| Marital Status | Married |
| Birthplace | England |
| Naturalization Status | First papers filed |
| Year of Immigration | 1926 |
| Age at First Marriage | 31 |
| Father's Birthplace | England |
| Mother's Birthplace | England |
| Occupation | Shipwright |
| Industry | Navy Yard |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Home Owned/Rented | R |
| Home Value / Rent | 35.00 |
| Radio Set | R |
| Birth Country | England |
| Birthplace (normalized) | england |
1940
San-Francisco-County, California
Head, age 46
San-Francisco-County, California · implied b. ~1894 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Leake |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 46 |
| Marital Status | Married |
| Birthplace | England |
| 1935 Residence (City) | San Francisco |
| 1935 Residence (County) | San Francisco |
| Naturalization Status | Naturalized |
| Occupation | Auto Mechanic |
| Industry | Garage |
| Class of Worker | PW |
| Hours Worked | 54 |
| Income (1939) | 1400 |
| Highest Grade | No 8 |
| 1935 Residence | Same Place |
| Birth Country | England |
| Birthplace (normalized) | england |
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 Lake across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Lake
Head · 1930 · age 37 · b. ~1893 · 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 Francisco, California
Open full size
1930 US Federal Census — San Francisco, California
Page Contents
50 people indexed on this census page (ia:1930:californiacensus00reel197:0083)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Perez | 45 | Head | Janitor | California |
| 2 | Josephine Perez | 44 | Wife | — | California |
| 3 | Evans Perez | 21 | Son | — | California |
| 4 | Joseph Perez | 18 | Son | — | California |
| 5 | Remy Perez | 14 | Son | — | California |
| 6 | Richard Perez | 12 | Son | — | California |
| 7 | Francis Perez | 10 | Son | — | California |
| 8 | Robert Perez | 8 | Son | — | California |
| 9 | Vincent Perez | 5 | Son | — | California |
| 10 | Thomas Perez | 5 | Son | — | California |
| 11 | Marylee Perez | 3 | Daughter | — | California |
| 12 | Paulette Perez | 1 | Daughter | — | California |
| 13 | Bella-Pa Perez | 12 | Daughter | — | California |
| 14 | John Lake THIS PERSON | 37 | Head | Shipwright | England |
| 15 | Blanche Lake | 32 | Wife | Auto Mechanic | England |
| 16 | John Lake | 4 | Son | — | England |
| 17 | Violet H. Krefting | 51 | Head | — | England |
| 18 | Alice M. L. Krefting | 24 | Daughter | Display Worker | California |
| 19 | Dorothy H. Krefting | 17 | Daughter | Fireman | California |
| 20 | Evelyn Krefting | 15 | Daughter | — | California |
| 21 | Harry Clark | 29 | Head | Salesman | California |
| 22 | Edith Clark | 22 | Wife | — | California |
| 23 | Harry Jr. Clark | 1 | Son | — | California |
| 24 | Colleen Clark | 0 | Daughter | — | California |
| 25 | Andrew Terranova | 35 | Head | Painter | Italy |
| 26 | Piera Terranova | 25 | Wife | — | California |
| 27 | Julia P. Terranova | 11 | Daughter | — | California |
| 28 | Josette Terranova | 11 | Daughter | — | California |
| 29 | Prudencia Terranova | 12 | Daughter | — | California |
| 30 | Anthony Terranova | 9 | Son | — | California |
| 31 | Andrew Terranova | 3 | Son | — | California |
| 32 | Fred Sutcliffe | 60 | Head | Marble Setter | England |
| 33 | Katherine Sutcliffe | 55 | Wife | — | California |
| 34 | William Houlfelt | 44 | Head | Jeweler | Germany |
| 35 | Elsie Houlfelt | 35 | Wife | — | Czechoslovakia |
| 36 | Ernest Houlfelt | 1 | Son | — | California |
| 37 | John Mueller | 50 | Head | Tailor | Massachusetts |
| 38 | Lucy Mueller | 38 | Wife | — | California |
| 39 | Charles Mueller | 17 | Son | Chauffeur | California |
| 40 | Louise Mueller | 11 | Daughter | — | California |
| 41 | Mueller | 8 | — | — | California |
| 42 | Adolf Grumpman | 52 | Head | Laborer | Austria-Bohemia |
| 43 | Cecilia Grumpman | 35 | Wife | — | England |
| 44 | Adam Thamberger | 27 | Head | Upholsterer | Russia |
| 45 | Elizabeth Thamberger | 29 | Wife | Housewife | Canada-English |
| 46 | Gerald Thamberger | 3 | Son | — | California |
| 47 | Robert Thamberger | 2 | Son | — | California |
| 48 | Wilfred Thamberger | 1 | Son | — | California |
| 49 | Lester Hancock | 31 | Head | Chauffeur | California |
| 50 | Julia Hancock | 22 | Wife | — | 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)