WM
William Montgomery — 1940 US Census Record
Model Tree available1940 United States Federal Census · King-County, Washington
Our Model Tree links this William Montgomery across the 1920, 1930 and 1940 US Censuses in King-County, Washington (XGBoost, ~Confirmed), with identified parents Frances & B — first a son (b.~1911), then head of a 3-person household.
Age 29
b. ~1911
Male
Son
Born: Washington
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | King-County, Washington |
| Surname | Montgomery |
| Given Name | William E. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 29 |
| Marital Status | Single |
| Birthplace | Washington |
| 1935 Residence (City) | SEATTLE CITY |
| 1935 Residence (County) | KING |
| Additional Details | |
| Occupation | Wholesale Plumbing |
| Industry | Own Shop |
| Class of Worker | OA |
| Hours Worked | 40 |
| Income (1939) | 0 |
| Highest Grade | C 4 |
| 1935 Residence | Same house |
| Birth State | Washington |
| Birth Country | United States |
| Birthplace (normalized) | washington |
| Occupation | Wholesale Plumbing |
| Township / Ward | Seattle City |
| Est. Birth Year | ~1911 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| Grace Montgomery | Head | — | 51 | ~1889 |
| Gordon Montgomery | Son | — | 22 | ~1918 |
| William Montgomery | Son | — | 29 | ~1911 |
Census Appearances
1920
King, Washington
Son, age 8
King, Washington · implied b. ~1912 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Montgomery |
| Given Name | William H Jr |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 8 |
| Marital Status | Single |
| Birthplace | Washington |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Wisconsin |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Scotch |
| Birth State | Washington |
| Birth Country | United States |
| Birthplace (normalized) | washington |
1930
King, Washington
Son, age 19
King, Washington · implied b. ~1911 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Montgomery |
| Given Name | William G. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Washington |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Michigan |
| Can Read/Write | Yes |
| Birth State | Washington |
| Birth Country | United States |
| Birthplace (normalized) | washington |
1940
King-County, Washington
Son, age 29
King-County, Washington · implied b. ~1911 — 3 household members
| Surname | Montgomery |
| Given Name | William E. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 29 |
| Marital Status | Single |
| Birthplace | Washington |
| 1935 Residence (City) | SEATTLE CITY |
| 1935 Residence (County) | KING |
| Occupation | Wholesale Plumbing |
| Industry | Own Shop |
| Class of Worker | OA |
| Hours Worked | 40 |
| Income (1939) | 0 |
| Highest Grade | C 4 |
| 1935 Residence | Same house |
| 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 William Montgomery across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Frances Montgomery (~0.92 confidence) and father B Montgomery (~0.92 confidence) and father William Montgomery (~0.92 confidence) and mother Grace Montgomery (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Frances Montgomery
b. ~1879
Source mother
● Household
· direct · ~0.92
Father
B Montgomery
b. ~1880
Source father
● Household
· direct · ~0.92
Father
William Montgomery
b. ~1881
Source father
● Household
· direct · ~0.92
Mother
Grace Montgomery
b. ~1889
Source mother
● Household
· direct · ~0.92
This person
Anchor record
William Montgomery
Son · 1940 · age 29 · b. ~1911 · Washington
★ You are viewing this record
Sibling
Gordon Montgomery
Sibling · 1940 · age 22
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
40 people indexed on this census page (nara:1940:m-t0627-04376-00010)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Ann C. Innster | 13 | Daughter | — | Washington |
| 2 | Lewis Jr. Innster | 9 | Son | — | Washington |
| 3 | Maude B. Innster | 74 | Mother | — | Canada |
| 4 | William T. Wheat | 24 | Lodger | — | Pennsylvania |
| 5 | Myrtlee Curran | 61 | Head | — | Iowa |
| 6 | John T. Jr. Curran | 29 | Son | Accountant | Washington |
| 7 | Mary V. Curran | 27 | Daughter | Registration | Washington |
| 8 | Leah M. Curran | 25 | Daughter | Clerk | Washington |
| 9 | Barbara J. Curran | 21 | Daughter | Advertising Co. | Washington |
| 10 | Orema E. Armstrong | 25 | Lodger | Secretary | Washington |
| 11 | Eugene W. Bell | 65 | Head | Lawyer | Ohio |
| 12 | Ruby C. Bell | 61 | Wife | — | Illinois |
| 13 | Lottie Morriss | 51 | Head | — | Minnesota |
| 14 | Cabell Kefauver | 61 | Head | Sales Mer. | Virginia |
| 15 | Lillian Kefauver | 54 | Wife | — | Virginia |
| 16 | Stella Johnstone | 67 | Head | — | Ohio |
| 17 | Edith Morton | 63 | Sister | — | Ohio |
| 18 | Beth Johnstone | 58 | Sister | Secretary | Ohio |
| 19 | Harriet Johnstone | 52 | Sister | Teacher | Ohio |
| 20 | Annabell Johnstone | 50 | Sister | Teacher | Ohio |
| 21 | Grace Montgomery | 51 | Head | — | North Dakota |
| 22 | William E. Montgomery THIS PERSON | 29 | Son | Wholesale Plumbing | Washington |
| 23 | Gordon O. Montgomery | 22 | Son | — | Washington |
| 24 | William V. Ryan | 62 | Head | — | Indiana |
| 25 | Francis H. Ryan | 51 | Wife | — | Oklahoma |
| 26 | Donald H. Ryan | 22 | Son | Credit Mer. | New York |
| 27 | Ray C. Clark | 47 | Head | Project Supervisor | Wisconsin |
| 28 | Emma Clark | 47 | Wife | — | Washington |
| 29 | Janice Clark | 17 | Daughter | — | Washington |
| 30 | Patricia Clark | 15 | Daughter | — | Washington |
| 31 | Elma L. Heaton | 55 | Lodger | Housekeeper | Canada |
| 32 | Phyllis E. Heaton | 22 | Lodger | Seamstress | Washington |
| 33 | Albert E. Smith | 63 | Head | Salesman | Iowa |
| 34 | Mary E. Smith | 67 | Wife | — | Iowa |
| 35 | Sarah O. Randall | 89 | Mother-in-law | — | Ohio |
| 36 | Katherine Weir | 39 | Lodger | Bookkeeper | Washington |
| 37 | Daniel M. Gardner | 75 | Head | Gardner | Pennsylvania |
| 38 | Mary H. Gardner | 77 | Wife | — | Pennsylvania |
| 39 | Dorothy D. Myers | 48 | Head | — | Washington |
| 40 | Richard D. Myers | 22 | Son | Mechanic | Washington |
Pedigree Summary
William + 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 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)