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Ralph Williams — 1940 US Census Record
Linked across censuses1940 United States Federal Census · San-Diego-County, California
Our Model Tree links this Ralph Williams across the 1920, 1930 and 1940 US Censuses in San-Diego-County, California (XGBoost, ~Confirmed) — first a head (b.~1893), then head of a 3-person household.
Age 47
b. ~1893
Male
Head
Born: South Dakota
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | San-Diego-County, California |
| Surname | Williams |
| Given Name | Ralph |
| Relationship to Head | head |
| Sex | M |
| Color / Race | White |
| Age | 47 |
| Marital Status | Married |
| Birthplace | South Dakota |
| 1935 Residence (City) | National City |
| 1935 Residence (County) | San Diego |
| Additional Details | |
| Occupation | Truck driver |
| Industry | for WPA |
| Class of Worker | GW |
| Hours Worked | 3 |
| Income (1939) | 720 |
| Highest Grade | No 6 |
| 1935 Residence | Same house |
| Birth State | South Dakota |
| Birth Country | United States |
| Birthplace (normalized) | south dakota |
| Occupation | Truck Driver |
| Township / Ward | National City |
| 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 1940 census.
| Name | Relation to head | Relative to Ralph | Age | Birth yr |
|---|---|---|---|---|
| Ralph Williams | Head | — | 47 | ~1893 |
| William Williams | Son | — | 24 | ~1916 |
| Fannie Williams | Spouse | — | 49 | ~1891 |
Census Appearances
1920
San Diego, …
Head, age 27
San Diego, California · implied b. ~1893 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Williams |
| Given Name | Ralph L. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Married |
| Birthplace | South Dakota |
| Father's Birthplace | South Dakota |
| Mother's Birthplace | Wisconsin |
| Occupation | Driver |
| Industry | Auto Truck |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Home Owned/Rented | R |
| Birth State | South Dakota |
| Birth Country | United States |
| Birthplace (normalized) | south dakota |
1930
San Diego, …
Head, age 37
San Diego, California · implied b. ~1893 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Williams |
| Given Name | Ralph L. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 37 |
| Marital Status | Married |
| Birthplace | South Dakota |
| Age at First Marriage | 21 |
| Father's Birthplace | Wisconsin |
| Mother's Birthplace | Wisconsin |
| Occupation | Mechanic |
| Industry | Automobile |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 25 |
| Veteran | No |
| Birth State | South Dakota |
| Birth Country | United States |
| Birthplace (normalized) | south dakota |
1940
San-Diego-County, California
Head, age 47
San-Diego-County, California · implied b. ~1893 — 3 household members
| Surname | Williams |
| Given Name | Ralph |
| Relationship to Head | head |
| Sex | M |
| Color / Race | White |
| Age | 47 |
| Marital Status | Married |
| Birthplace | South Dakota |
| 1935 Residence (City) | National City |
| 1935 Residence (County) | San Diego |
| Occupation | Truck driver |
| Industry | for WPA |
| Class of Worker | GW |
| Hours Worked | 3 |
| Income (1939) | 720 |
| Highest Grade | No 6 |
| 1935 Residence | Same house |
| Birth State | South Dakota |
| Birth Country | United States |
| Birthplace (normalized) | south dakota |
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 Ralph Williams across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Ralph Williams
Head · 1940 · age 47 · b. ~1893 · 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 — San-Diego-County, California
Open full size
1940 US Federal Census — San-Diego-County, California
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00297-00141)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Julian Prendez | 27 | head | Laborer | Texas |
| 2 | Mary Prendez | 24 | wife | — | California |
| 3 | Julia Prendez | 5 | daughter | — | California |
| 4 | Pete Sanchez | 57 | head | Lemon Picker | Mexico |
| 5 | Josephine Sanchez | 60 | wife | — | Mexico |
| 6 | John Bonilla | 25 | head | Butcher | Mexico |
| 7 | Mary Bonilla | 19 | wife | — | California |
| 8 | Daniel Bonilla | 2 | son | — | California |
| 9 | Gloria Bonilla | 1 | daughter | — | California |
| 10 | Earl Clinkscales | 52 | head | — | — |
| 11 | Blanche Clinkscales | 43 | wife | — | — |
| 12 | Jackie Clinkscales | 4 | son | — | — |
| 13 | Betty Clinkscales | 2 | daughter | — | — |
| 14 | Wm B. Gilleran | 73 | head | Soldier | Pennsylvania |
| 15 | Sarah Jane Gilleran | 68 | wife | — | Vermont |
| 16 | Charles B. Baron | 47 | head | Painter | California |
| 17 | Charlotte D. Baron | 49 | wife | — | California |
| 18 | Morris Greenig | 27 | head | Painter | Utah |
| 19 | Doreen Greenig | 26 | wife | — | California |
| 20 | Morris Lee Greenig | 3 | son | — | California |
| 21 | Al Fernburg | 50 | head | Plumber | California |
| 22 | Jim Neary | 51 | head | Painter | New York |
| 23 | Pallenia Neary | 38 | wife | — | Arizona |
| 24 | Dana Neary | 14 | son | — | California |
| 25 | Martin Fernburg | 40 | head | Fireman | California |
| 26 | Viola Fernburg | 40 | wife | Beauty Operator | Pennsylvania |
| 27 | Martin Fernburg | 16 | son | — | California |
| 28 | Anthony Manis | 53 | head | Railway Brakeman | California |
| 29 | Frances Manis | 45 | wife | — | California |
| 30 | Mark Manis | 26 | son | Machinist Mate | California |
| 31 | Mack Manis | 24 | son | Fireman | California |
| 32 | Philip Manis | 23 | son | Laborer | California |
| 33 | Reio Manis | 21 | son | Machinist | California |
| 34 | Robert Manis | 19 | son | Seaman | California |
| 35 | Pearl Manis | 11 | daughter | — | California |
| 36 | Modesto Roanna | 42 | head | Lemon Picker | Mexico |
| 37 | Ysidra Roanna | 46 | wife | — | Mexico |
| 38 | Ralph Williams THIS PERSON | 47 | head | Truck Driver | South Dakota |
| 39 | Fannie Williams | 49 | wife | — | Washington |
| 40 | William Williams | 24 | son | Painter | 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)