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Thomas Griffin — 1930 US Census Record
Model Tree available1930 United States Federal Census · San Francisco, California
Our Model Tree links this Thomas Griffin across the 1910, 1920 and 1930 US Censuses in San Francisco, California (XGBoost, ~Confirmed), with identified parents Geo & George — first a son (b.~1902), then head of a 4-person household.
Age 28
b. ~1902
Male
Son
Born: California
Married
1930 Census Record Details
| Census Year | 1930 |
| Location | San Francisco, California |
| Surname | Griffin |
| Given Name | Thomas K. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 28 |
| Marital Status | Married |
| Birthplace | California |
| Age at First Marriage | 20 |
| Father's Birthplace | California |
| Mother's Birthplace | California |
| Additional Details | |
| Occupation | Chauffeur |
| Industry | Cab Co. |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
| Occupation | Chauffeur |
| Township / Ward | San Francisco |
| Est. Birth Year | ~1902 |
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 Thomas | Age | Birth yr |
|---|---|---|---|---|
| Geo Griffin | Head | — | 56 | ~1874 |
| Bertha Griffin | Son | — | 27 | ~1903 |
| Irene Griffin | Other | — | 54 | ~1876 |
| Thomas Griffin | Son | — | 28 | ~1902 |
Census Appearances
1910
San Francisco, …
Son, age 8
San Francisco, California · implied b. ~1902 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Griffin |
| Given Name | Thomas R. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 8 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | California |
| Mother's Birthplace | California |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1920
San Francisco, …
Son, age 18
San Francisco, California · implied b. ~1902 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Griffin |
| Given Name | Thomas |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | California |
| Mother's Birthplace | California |
| Occupation | Mechanic's helper |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1930
San Francisco, …
Son, age 28
San Francisco, California · implied b. ~1902 — 4 household members
| Surname | Griffin |
| Given Name | Thomas K. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 28 |
| Marital Status | Married |
| Birthplace | California |
| Age at First Marriage | 20 |
| Father's Birthplace | California |
| Mother's Birthplace | California |
| Occupation | Chauffeur |
| Industry | Cab Co. |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
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 Thomas Griffin across 3 US Census years (1910, 1920 and 1930) in San Francisco, California, using XGBoost record linkage. Identified parents: father Geo Griffin (~0.92 confidence) and father George Griffin (~0.92 confidence) and mother Jennie Griffin (~0.92 confidence) and mother Jennie Griffin (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Geo Griffin
b. ~1874
Source father
● Household
· direct · ~0.92
Father
George Griffin
b. ~1875
Source father
● Household
· direct · ~0.92
Mother
Jennie Griffin
b. ~1875
Source mother
● Household
· direct · ~0.92
Mother
Jennie Griffin
b. ~1877
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Thomas Griffin
Son · 1930 · age 28 · b. ~1902 · California
★ You are viewing this record
Sibling
Bertha Griffin
Sibling · 1930 · age 27
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 Francisco, California
Open full size
1930 US Federal Census — San Francisco, California
Page Contents
43 people indexed on this census page (ia:1930:californiacensus00reel204:0152)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Loraine Sieke | 5 | Daughter | — | California |
| 52 | Marguerite Aggeler | 50 | Head | Teacher | California |
| 53 | Paul Aggeler | 18 | Son | Student | California |
| 54 | Elizabeth M. Kelley | 39 | Lodger | Teacher | Massachusetts |
| 55 | J. Roy Bowman | 38 | Head | Proprietor | Texas |
| 56 | Jessie E. Bowman | 28 | Wife-H | — | Texas |
| 57 | E. A. Patterson | 44 | Head | Gold Mining | Texas |
| 58 | K. J. Patterson | 40 | Wife-H | — | California |
| 61 | Leonard Hubbell | 25 | Head | Mail Clerk | California |
| 62 | Eglantine Hubbell | 21 | Wife-H | — | France |
| 64 | C. Chas. Ute | 55 | Head | Police Officer | Germany |
| 65 | Emily C. Ute | 48 | Wife-H | — | Minnesota |
| 66 | Margaret E. Ute | 20 | Daughter | Book-Keeper | California |
| 67 | Andrew Ute | 18 | Son | Attendant | California |
| 68 | Karl Ute | 17 | Son | Painter | California |
| 69 | Domenick Ruscera | 37 | Head | Salesman | Italy |
| 70 | Marie Ruscera | 25 | Wife-H | — | Italy |
| 71 | Alex Macdonald | 35 | Head | Buyer | California |
| 72 | Gladys Macdonald | 32 | Wife-H | — | California |
| 73 | Ross Macdonald | 5 | Son | — | California |
| 74 | Herman Becker | 42 | Head | Proprietor | Pennsylvania |
| 75 | Sarah Becker | 38 | Wife-H | — | Poland |
| 76 | Beatrice Becker | 18 | Daughter | Clerical Work | California |
| 77 | Doris Becker | 12 | Daughter | — | California |
| 78 | Geo. W. Griffin | 56 | Head | Fireman | California |
| 79 | Irene E. Griffin | 54 | Wife-H | — | California |
| 80 | Thomas K. Griffin THIS PERSON | 28 | Son | Chauffeur | California |
| 81 | Bertha Griffin | 27 | Son | Shipping Clerk | California |
| 82 | H. G. Bartels | 29 | Head | Salesman | California |
| 83 | Ethel Bartels | 29 | Wife-H | Clerk | So. Carolina |
| 84 | Enos Kane | 49 | Head | Broker | Irish Free State |
| 85 | Catherine K. Kane | 41 | Wife-H | — | Irish Free State |
| 86 | Enos D. Kane | 13 | Son | — | California |
| 87 | Catherine Kane | 9 | Daughter | — | California |
| 88 | Dorothy Kane | 5 | Daughter | — | California |
| 90 | Armand Cohn | 39 | Head | Salesman | California |
| 91 | Dorothy Cohn | 35 | Wife-H | — | Utah |
| 92 | Armand Jr. Cohn | 6 | Son | — | California |
| 93 | O. W. Kruger | 26 | Servant | Housework | Germany |
| 95 | Clara Casey | 40 | H | — | Illinois |
| 98 | Clifton A. Bell | 31 | Head | Operator | California |
| 99 | Emilie Brinkerhoff Bell | 52 | Mother-H | Doctor | Indiana |
| 100 | Elizabeth Dolls | 37 | Boarder | Nurse | California |
Related Census Records
Pedigree Summary
Thomas + 1 sibling
Gen 1 · 4 parents
~0.92
Max depth 4 (1900–1950 window)
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)