RC
Robert Cook — 1930 US Census Record
Linked across censuses1930 United States Federal Census · King, Washington
Our Model Tree links this Robert Cook across the 1930 and 1940 US Censuses in King, Washington (XGBoost, ~Confirmed) — first a son (b.~1918), then head of a 12-person household.
Age 12
b. ~1918
Male
Son
Born: Washington
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | King, Washington |
| Surname | Cook |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Washington |
| Father's Birthplace | Kentucky |
| Mother's Birthplace | Kentucky |
| Additional Details | |
| Can Read/Write | Yes |
| Birth State | Washington |
| Birth Country | United States |
| Birthplace (normalized) | washington |
| Township / Ward | Seattle City Pt |
| Est. Birth Year | ~1918 |
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 |
|---|---|---|---|---|
| Elizabeth Cook | Daughter | — | 4 | ~1926 |
| Margaret Cook | Daughter | — | 9 | ~1921 |
| Lillian Cook | Daughter | — | 19 | ~1911 |
| Dorothy Cook | Daughter | — | 15 | ~1915 |
| William Cook | Head | — | 53 | ~1877 |
| Thomas Cook | Son | — | 1 | ~1929 |
| John Cook | Son | — | 2 | ~1928 |
| William Cook | Son | — | 21 | ~1909 |
| Richard Cook | Son | — | 6 | ~1924 |
| Robert Cook | Son | — | 12 | ~1918 |
| James Cook | Son | — | 17 | ~1913 |
| Maggie Cook | Spouse | — | 52 | ~1878 |
Census Appearances
1930
King, Washington
Son, age 12
King, Washington · implied b. ~1918 — 12 household members
| Surname | Cook |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Washington |
| Father's Birthplace | Kentucky |
| Mother's Birthplace | Kentucky |
| Can Read/Write | Yes |
| Birth State | Washington |
| Birth Country | United States |
| Birthplace (normalized) | washington |
1940
King-County, Washington
Son, age 22
King-County, Washington · implied b. ~1918 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cook |
| Given Name | Ross M. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Washington |
| 1935 Residence (City) | Seattle (City) |
| 1935 Residence (County) | King |
| Occupation | Laborer machinist |
| Industry | Cannery |
| Class of Worker | PW |
| Hours Worked | 28 |
| Income (1939) | 270 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Washington |
| Birth Country | United States |
| Birthplace (normalized) | washington |
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 (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Robert Cook
Son · 1930 · age 12 · b. ~1918 · Washington
★ You are viewing this record
Sibling
James Cook
Sibling · 1930 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Dorothy Cook
Sibling · 1930 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Cook
Sibling · 1930 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Richard Cook
Sibling · 1930 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas Cook
Sibling · 1930 · age 1
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Elizabeth Cook
Sibling · 1930 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Cook
Sibling · 1930 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Cook
Sibling · 1930 · age 2
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lillian Cook
Sibling · 1930 · age 19
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 — King, Washington
Open full size
1930 US Federal Census — King, Washington
Page Contents
38 people indexed on this census page (ia:1930:15thcensus2496unit:0661)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Earl J Jacobs | 32 | Head | Proprietor | Maryland |
| 2 | Mae E Jacobs | 37 | Wife | — | Indiana |
| 3 | Beatrice G Jacobs | 13 | Daughter | — | Indiana |
| 4 | Robert E Jacobs | 11 | Son | — | Indiana |
| 5 | Richard L Jacobs | 9 | Son | — | Indiana |
| 6 | Mary E Jacobs | 3 | Daughter | — | Washington |
| 7 | Mary Murphy | 63 | Head | Housekeeper | Ireland |
| 8 | Nellie M Murphy | 32 | Daughter | Stenographer | Washington |
| 9 | William T Cook | 53 | Head | Salesman | Kentucky |
| 10 | Maggie Cook | 52 | Wife | — | Kentucky |
| 11 | William M Cook | 21 | Son | Manager | Washington |
| 12 | Lillian Cook | 19 | Daughter | — | Washington |
| 13 | James Cook | 17 | Son | — | Washington |
| 14 | Dorothy Cook | 15 | Daughter | — | Washington |
| 15 | Robert Cook THIS PERSON | 12 | Son | — | Washington |
| 16 | Margaret Cook | 9 | Daughter | — | Washington |
| 17 | Richard Cook | 6 | Son | — | Washington |
| 18 | Elizabeth Cook | 4 | Daughter | — | Washington |
| 19 | John Cook | 2 | Son | — | Washington |
| 20 | Thomas Cook | 1 | Son | — | Washington |
| 21 | William Fuller | 46 | Head | Janitor | Minnesota |
| 22 | Clara S Fuller | 43 | Wife | — | Minnesota |
| 23 | Lafayette Fuller | 19 | Son | Stockroom Helper | Montana |
| 24 | Gladys B Fuller | 17 | Daughter | — | Montana |
| 25 | William Fuller | 11 | Son | — | Montana |
| 26 | Carl Modahl | 41 | Head | Carpenter | Norway |
| 27 | Olga Modahl | 31 | Wife | — | Norway |
| 28 | George Modahl | 7 | Son | — | Washington |
| 29 | William Bevan | 48 | Head | Foreman | Pennsylvania |
| 30 | Minnie S Bevan | 43 | Wife | — | Wisconsin |
| 31 | Marian Bevan | 14 | Daughter | — | Washington |
| 32 | Lucille Bevan | 13 | Daughter | — | Washington |
| 33 | Lester Grant | 33 | Head | — | Washington |
| 34 | Edna Grant | 33 | Wife | — | Canada-Eng |
| 35 | Edward L Grant | 5 | Son | — | Washington |
| 36 | James Grant | 0 | Son | — | Washington |
| 37 | Andrew E Pederson | 52 | Lodger | Butcher | Denmark |
| 38 | William H Oliver | 23 | Lodger | Salesman | Pennsylvania |
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)