WF
William Farrell — 1940 US Census Record
Linked across censuses1940 United States Federal Census · King-County, Washington
Our Model Tree links this William Farrell across the 1930 and 1940 US Censuses in King-County, Washington (XGBoost, ~Confirmed) — first a son (b.~1921), then head of a 12-person household.
Age 19
b. ~1921
Male
Son
Born: Montana
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | King-County, Washington |
| Surname | Farrell |
| Given Name | William J. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Montana |
| 1935 Residence (City) | Seattle City |
| 1935 Residence (County) | King |
| Additional Details | |
| Class of Worker | 0 |
| Highest Grade | H-3 |
| 1935 Residence | Same place |
| Birth State | Montana |
| Birth Country | United States |
| Birthplace (normalized) | montana |
| Township / Ward | Seattle City |
| Est. Birth Year | ~1921 |
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 1940 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| William Farrell | Son | — | 19 | ~1921 |
| Anna Walsh | Other | — | 73 | ~1867 |
| Edward Farrell | Son | — | 11 | ~1929 |
| Marcia Farrell | Daughter | — | 9 | ~1931 |
| Peter Farrell | Head | — | 56 | ~1884 |
| Thomas Farrell | Son | — | 21 | ~1919 |
| Mary Farrell | Spouse | — | 46 | ~1894 |
| Florence Farrell | Daughter | — | 7 | ~1933 |
| Kathryn Farrell | Daughter | — | 6 | ~1934 |
| Peter Farrell | Son | — | 18 | ~1922 |
| Anna Farrell | Daughter | — | 16 | ~1924 |
| Patricia Farrell | Daughter | — | 15 | ~1925 |
Census Appearances
1930
King, Washington
Son, age 9
King, Washington · implied b. ~1921 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Farrell |
| Given Name | William |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 9 |
| Marital Status | Single |
| Birthplace | Montana |
| Father's Birthplace | Canada English |
| Mother's Birthplace | Montana |
| Occupation | none |
| Birth State | Montana |
| Birth Country | United States |
| Birthplace (normalized) | montana |
1940
King-County, Washington
Son, age 19
King-County, Washington · implied b. ~1921 — 12 household members
| Surname | Farrell |
| Given Name | William J. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Montana |
| 1935 Residence (City) | Seattle City |
| 1935 Residence (County) | King |
| Class of Worker | 0 |
| Highest Grade | H-3 |
| 1935 Residence | Same place |
| Birth State | Montana |
| Birth Country | United States |
| Birthplace (normalized) | montana |
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 William Farrell across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
William Farrell
Son · 1940 · age 19 · b. ~1921 · Washington
★ You are viewing this record
Sibling
Thomas Farrell
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Peter Farrell
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Edward Farrell
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Anna Farrell
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Kathryn Farrell
Sibling · 1940 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Patricia Farrell
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Marcia Farrell
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Florence Farrell
Sibling · 1940 · age 7
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
1940 US Federal Census — King-County, Washington
Open full size
1940 US Federal Census — King-County, Washington
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-04379-00103)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Gabor Levay | 51 | Lodger | Poultry & Egg Salesman | Czechoslovakia |
| 42 | Freida Levay | 47 | Lodger | Ripper Of Old Clothing | Yugo Slavia |
| 43 | Erna Fall | 19 | Lodger | Saleswoman | Austria |
| 44 | Signy E. Cannon | 55 | Head | Stenographer | Norway |
| 45 | James W. Cannon | 19 | Son | Dish Washer | State of Wash. |
| 46 | John E. Cannon | 17 | Son | — | State of Wash. |
| 47 | Ruth Jean Cannon | 14 | Daughter | — | State of Wash. |
| 48 | Eric Ericsson | 84 | Father | — | Sweden |
| 50 | Frank Forrestal | 61 | Head | Brick Layer | Wisconsin |
| 51 | Jennie Forrestal | 54 | Wife | — | Wisconsin |
| 52 | James Mcintosh | 26 | Lodger | Typewriter Repairman | Idaho |
| 53 | Margaret Mcintosh | 24 | Lodger | Waitress | Colorado |
| 54 | D. Morton James | 45 | Head | Accountant | Texas |
| 55 | Olga C. E. James | 41 | Wife | — | Norway |
| 56 | Eileene M. James | 19 | Daughter | Children'S Nurse | Texas |
| 57 | Elaine L. James | 17 | Daughter | Children'S Nurse | Texas |
| 58 | Morton Edward James | 9 | Son | — | State of Wash. |
| 59 | Shirley Ann Schneider | 4 | Boarder | — | State of Wash. |
| 60 | Peter J. Farrell | 56 | Head | — | Illinois |
| 61 | Mary E. Farrell | 46 | Wife | — | Montana |
| 62 | Thomas P. Farrell | 21 | Son | Clerk | Montana |
| 63 | William J. Farrell THIS PERSON | 19 | Son | — | Montana |
| 64 | Peter J. Farrell | 18 | Son | — | Montana |
| 65 | Anna M. Farrell | 16 | Daughter | — | Montana |
| 66 | Patricia L. Farrell | 15 | Daughter | — | Montana |
| 67 | Edward J. Farrell | 11 | Son | — | State of Wash. |
| 68 | Marcia Jane Farrell | 9 | Daughter | — | State of Wash. |
| 69 | Florence M. Farrell | 7 | Daughter | — | State of Wash. |
| 70 | Kathryn L. Farrell | 6 | Daughter | — | State of Wash. |
| 71 | Anna M. Walsh | 73 | Mother-in-law | — | Massachusetts |
| 72 | Hadney Fostow | 64 | Head | Real Estate Salesman | South Dakota |
| 73 | Lula E. Fostow | 59 | Wife | — | Iowa |
| 74 | Mickey Fostow | 19 | Daughter | — | Montana |
| 75 | Charlotte Sherwood | 69 | Head | — | Utah |
| 76 | Highley D. Orrin | 44 | Son-in-law | Jack-Ham-Merman | Oregon |
| 77 | Ida M. Orrin | 29 | Daughter | — | Washington |
| 78 | Wilhelmina C. Mayer | 45 | Head | Stenographer-Bookkeeper | Pennsylvania |
| 79 | Mathilda M. Mayer | 75 | Mother | — | Pennsylvania |
| 80 | R. P. Bradley | 69 | Head | Fire Ins. Salesman | Illinois |
Related Census Records
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)