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Lydia Williams — 1930 US Census Record
Linked across censuses1930 United States Federal Census · San Diego, California
Our Model Tree links this Lydia Williams across the 1920 and 1930 US Censuses in San Diego, California (XGBoost, ~Confirmed) — first a daughter (b.~1896), then head of a 5-person household.
Age 34
b. ~1896
Female
Daughter
Born: South Dakota
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | San Diego, California |
| Surname | Williams |
| Given Name | Lydia L |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 34 |
| Marital Status | Single |
| Birthplace | South Dakota |
| Father's Birthplace | Wisconsin |
| Mother's Birthplace | Wisconsin |
| Additional Details | |
| Occupation | Bookkeeper |
| Industry | History Public |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | South Dakota |
| Birth Country | United States |
| Birthplace (normalized) | south dakota |
| Occupation | Bookkeeper |
| Township / Ward | National City City Part Of |
| Est. Birth Year | ~1896 |
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.
5 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Lydia | Age | Birth yr |
|---|---|---|---|---|
| Arthur Williams | Head | — | 64 | ~1866 |
| Lydia Williams | Daughter | — | 34 | ~1896 |
| Lillian Williams | Daughter | — | 20 | ~1910 |
| Doris Williams | Daughter | — | 24 | ~1906 |
| Jane Williams | Spouse | — | 61 | ~1869 |
Census Appearances
1920
San Diego, …
Daughter, age 24
San Diego, California · implied b. ~1896 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Williams |
| Given Name | Lila I. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | South Dakota |
| Father's Birthplace | Wisconsin |
| Mother's Birthplace | Wisconsin |
| Occupation | Clerk |
| Industry | Express Office |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | South Dakota |
| Birth Country | United States |
| Birthplace (normalized) | south dakota |
1930
San Diego, …
Daughter, age 34
San Diego, California · implied b. ~1896 — 5 household members
| Surname | Williams |
| Given Name | Lydia L |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 34 |
| Marital Status | Single |
| Birthplace | South Dakota |
| Father's Birthplace | Wisconsin |
| Mother's Birthplace | Wisconsin |
| Occupation | Bookkeeper |
| Industry | History Public |
| Class of Worker | W |
| Can Read/Write | Yes |
| 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 Lydia Williams across 2 US Census years (1920 and 1930) in San Diego, California, using XGBoost record linkage.
Show:
This person
Anchor record
Lydia Williams
Daughter · 1930 · age 34 · b. ~1896 · California
★ You are viewing this record
Sibling
Doris Williams
Sibling · 1930 · age 24
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lillian Williams
Sibling · 1930 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
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:californiacensus00reel190:0885)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Kenneth E Gills | 10 | Son | None | Ohio |
| 2 | Lulu D Broeker | 40 | Head | Shipping Clerk | Iowa |
| 3 | Alice L Broeker | 15 | Daughter | None | Iowa |
| 4 | Lulu M Broeker | 12 | Daughter | None | Iowa |
| 5 | Raymond L Smith | 20 | Head | Truck Driver | California |
| 6 | Lucy M Smith | 19 | Wife | None | California |
| 7 | Loudy A Aust | 43 | Mother-in-law | Secretary | Ohio |
| 8 | Martin W Hess | 31 | Head | Iron Worker | Ohio |
| 9 | Agnes Hess | 29 | Wife | None | Scotland |
| 10 | Agnes L Hess | 3 | Daughter | None | Canada-English |
| 11 | Martin L Hess | 1 | Son | None | California |
| 12 | Harry G Brand | 41 | Head | Steel Worker | Missouri |
| 13 | Mildred E Brand | 22 | Wife | None | Massachusetts |
| 14 | Elizabeth Brand | 2 | Daughter | None | California |
| 15 | Lulu Brand | 64 | Mother | Practical Nurse | Missouri |
| 16 | Julius L Smith | 55 | Head | None | Ohio |
| 17 | Minnie M Smith | 53 | Wife | None | Maine |
| 18 | Julius L Jr Smith | 17 | Son | None | California |
| 19 | Joseph P Theobald | 60 | Head | Gardener | Pennsylvania |
| 20 | Gertrude E Theobald | 56 | Wife | None | Pennsylvania |
| 21 | Grant E Bush | 65 | Head | Manager | Illinois |
| 22 | Esther M Bush | 50 | Wife | None | Kansas |
| 23 | Irene M Wheeler | 34 | Step-daughter | Operator | Kansas |
| 24 | Mary A Banker | 79 | Sister-in-law | None | Wisconsin |
| 25 | Ida E Geil | 63 | Head | None | Minnesota |
| 26 | James Stephens | 52 | Head | Agent-Ins. | Missouri |
| 27 | Mary F Stephens | 48 | Wife | None | Missouri |
| 28 | William D Ralph | 40 | Head | Medical Surgeon | New York |
| 29 | Harriet C Ralph | 30 | Wife | None | Illinois |
| 30 | William D Jr Ralph | 8 | Son | None | California |
| 31 | Elizabeth A Ralph | 3 | Daughter | None | California |
| 32 | Alfred Anderson | 29 | Head | Salesman | Connecticut |
| 33 | Marcia Anderson | 55 | Mother | None | Canada-English |
| 34 | Maude Bagnall | 50 | Head | None | Missouri |
| 35 | Doris H Bagnall | 23 | Son | Prescription Clerk | Iowa |
| 36 | Mary A Copeland | 47 | Head | None | Vermont |
| 37 | Alma Copeland | 23 | Step-daughter | Teacher | California |
| 38 | Herbert Dowd | 62 | Head | None | Iowa |
| 39 | Minnie R Dowd | 56 | Wife | None | Iowa |
| 40 | Lucian L Dowd | 23 | Son | Shipping Clerk | Iowa |
| 41 | Arthur G Williams | 64 | Head | Real Estate Broker | Wisconsin |
| 42 | Jane A Williams | 61 | Wife | None | Wisconsin |
| 43 | Lydia L Williams THIS PERSON | 34 | Daughter | Bookkeeper | South Dakota |
| 44 | Doris M Williams | 24 | Daughter | Teacher | California |
| 45 | Lillian L Williams | 20 | Daughter | Teacher | California |
| 46 | Clarence E Ganguin | 34 | Head | Salesman | Kansas |
| 47 | Gladys J Ganguin | 34 | Wife | None | Kansas |
| 48 | Naida B Cullis | 13 | Step-daughter | None | Colorado |
| 49 | Clarence L Jr Ganguin | 7 | Son | None | Colorado |
| 50 | Lois L Ganguin | 5 | Son | None | Colorado |
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)