RC
Robert Cook — 1930 US Census Record
Linked across censuses1930 United States Federal Census · San Francisco, California
Our Model Tree links this Robert Cook across the 1920 and 1930 US Censuses in San Francisco, California (XGBoost, ~Confirmed) — first a son (b.~1917), then head of a 12-person household.
Age 13
b. ~1917
Male
Son
Born: Tennessee
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | San Francisco, California |
| Surname | Cook |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Tennessee |
| Father's Birthplace | Tennessee |
| Mother's Birthplace | Tennessee |
| Additional Details | |
| Can Read/Write | Yes |
| Birth State | Tennessee |
| Birth Country | United States |
| Birthplace (normalized) | tennessee |
| Township / Ward | San Francisco City |
| Est. Birth Year | ~1917 |
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.
12 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Robert | Age | Birth yr |
|---|---|---|---|---|
| Minnie Cook | Daughter | — | 19 | ~1911 |
| John Cook | Head | — | 66 | ~1864 |
| Richard Cook | Son | — | 3 | ~1927 |
| Edward Cook | Son | — | 7 | ~1923 |
| Thomas Cook | Son | — | 9 | ~1921 |
| James Cook | Son | — | 17 | ~1913 |
| William Cook | Son | — | 15 | ~1915 |
| Henry Cook | Son | — | 1 | ~1929 |
| Charles Cook | Son | — | 5 | ~1925 |
| George Cook | Son | — | 11 | ~1919 |
| Robert Cook | Son | — | 13 | ~1917 |
| Mary Cook | Spouse | — | 60 | ~1870 |
Census Appearances
1920
San Francisco, …
Son, age 2
San Francisco, California · implied b. ~1918 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cook |
| Given Name | Robert A. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Tennessee |
| Father's Birthplace | Tennessee |
| Mother's Birthplace | Missouri |
| Birth State | Tennessee |
| Birth Country | United States |
| Birthplace (normalized) | tennessee |
1930
San Francisco, …
Son, age 13
San Francisco, California · implied b. ~1917 — 12 household members
| Surname | Cook |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Tennessee |
| Father's Birthplace | Tennessee |
| Mother's Birthplace | Tennessee |
| Can Read/Write | Yes |
| Birth State | Tennessee |
| Birth Country | United States |
| Birthplace (normalized) | tennessee |
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 Robert Cook across 2 US Census years (1920 and 1930) in San Francisco, California, using XGBoost record linkage.
Show:
This person
Anchor record
Robert Cook
Son · 1930 · age 13 · b. ~1917 · California
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Sibling
Minnie Cook
Sibling · 1930 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
George Cook
Sibling · 1930 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Cook
Sibling · 1930 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Cook
Sibling · 1930 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Charles Cook
Sibling · 1930 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Henry Cook
Sibling · 1930 · age 1
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Richard Cook
Sibling · 1930 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Edward Cook
Sibling · 1930 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas Cook
Sibling · 1930 · age 9
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
14 people indexed on this census page (ia:1930:californiacensus00reel210:0314)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | John Cook | 66 | Head | Painter | Tennessee |
| 52 | Mary Cook | 60 | Wife | — | Tennessee |
| 53 | Minnie Cook | 19 | Daughter | Saleslady | Tennessee |
| 54 | James Cook | 17 | Son | Laborer | Tennessee |
| 55 | William Cook | 15 | Son | — | Tennessee |
| 56 | Robert Cook THIS PERSON | 13 | Son | — | Tennessee |
| 57 | George Cook | 11 | Son | — | Tennessee |
| 58 | Thomas Cook | 9 | Son | — | Tennessee |
| 59 | Edward Cook | 7 | Son | — | Tennessee |
| 60 | Charles Cook | 5 | Son | — | Tennessee |
| 61 | Richard Cook | 3 | Son | — | Tennessee |
| 62 | Henry Cook | 1 | Son | — | Tennessee |
| 63 | Mary Richardson | 70 | Head | — | New York |
| 64 | Frankie Richardson | 41 | Daughter | — | Tennessee |
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)