MP
Mary Preston — 1940 US Census Record
Linked across censuses1940 United States Federal Census · King-County, Washington
Our Model Tree links this Mary Preston across the 1930 and 1940 US Censuses in King-County, Washington (XGBoost, ~Confirmed) — first a daughter (b.~1921), then head of a 6-person household.
Age 19
b. ~1921
Female
Daughter
Born: WASHINGTON
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | King-County, Washington |
| Surname | PRESTON |
| Given Name | MARY BELLE |
| Relationship to Head | DAUGHTER |
| Sex | F |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | WASHINGTON |
| 1935 Residence (City) | Seattle City |
| 1935 Residence (County) | KING |
| Additional Details | |
| Industry | O |
| Highest Grade | C-2 |
| 1935 Residence | Same place |
| Birth State | Washington |
| Birth Country | United States |
| Birthplace (normalized) | washington |
| 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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Jean Preston | Daughter | — | 10 | ~1930 |
| Mary Preston | Daughter | — | 19 | ~1921 |
| Howard Preston | Head | — | 54 | ~1886 |
| Frank Preston | Son | — | 21 | ~1919 |
| Anna Preston | Daughter | — | 15 | ~1925 |
| Lucy Preston | Spouse | — | 49 | ~1891 |
Census Appearances
1930
King, Washington
Daughter, age 8
King, Washington · implied b. ~1922 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Preston |
| Given Name | Marjorie L |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 8 |
| Marital Status | Single |
| Birthplace | Washington |
| Father's Birthplace | Minnesota |
| Mother's Birthplace | Indiana |
| Can Read/Write | Yes |
| Birth State | Washington |
| Birth Country | United States |
| Birthplace (normalized) | washington |
1940
King-County, Washington
Daughter, age 19
King-County, Washington · implied b. ~1921 — 6 household members
| Surname | PRESTON |
| Given Name | MARY BELLE |
| Relationship to Head | DAUGHTER |
| Sex | F |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | WASHINGTON |
| 1935 Residence (City) | Seattle City |
| 1935 Residence (County) | KING |
| Industry | O |
| Highest Grade | C-2 |
| 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 Mary Preston across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Preston
Daughter · 1940 · age 19 · b. ~1921 · Washington
★ You are viewing this record
Sibling
Anna Preston
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Frank Preston
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Jean Preston
Sibling · 1940 · age 10
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-t0627-04376-00036)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Jeane Wahlgreen | 17 | DAUGHTER | — | WASHINGTON |
| 2 | Fred. H. Merklinchaus | 24 | HEAD | Mechanic | WASHINGTON |
| 3 | Vernon Sampson | 25 | PARTNER | 10 Warehouse | IDAHO |
| 4 | James Merklinchaus | 17 | PARTNER | — | WASHINGTON |
| 5 | Ellis Merklinchaus | 18 | PARTNER | — | WASHINGTON |
| 6 | Jadwiga Prochowska | 32 | ROOMER | Teacher | POLAND |
| 7 | Willard M. Erickson | 32 | ROOMER | Clerk | WASHINGTON |
| 8 | Lucius U. Baird | 76 | HEAD | Ministry | ILLINOIS |
| 9 | Jeannette Baird | 70 | WIFE | — | ENGLISH CANADA |
| 10 | Mosher Leone | 19 | MAID | Maid | MINNESOTA |
| 11 | Mariah Magner | 40 | ROOMER | Stenographer | IOWA |
| 12 | Helen C. Andrews | 36 | ROOMER | Teacher | MINNESOTA |
| 13 | Pyrl Stewart | 34 | ROOMER | Book Keeper | WASHINGTON |
| 14 | Elbert Harlow | 23 | ROOMER | — | CHINA |
| 15 | G. R. Kochell | 25 | ROOMER | — | WASHINGTON |
| 16 | Louise Bretnorst | 43 | ROOMER | Teacher | SOUTH DAKOTA |
| 17 | Helen K. Vaupell | 56 | ROOMER | Teacher | MICHIGAN |
| 18 | Paul R. Smith | 23 | ROOMER | — | IOWA |
| 19 | Leslie Buell | 32 | ROOMER | — | WASHINGTON |
| 20 | Charles R. Ittner | 34 | ROOMER | Electric Engineer | ILLINOIS |
| 21 | Albert J. Pfister | 27 | ROOMER | Student Laborer | NEW JERSEY |
| 22 | Howard Preston | 54 | HEAD | Teacher | IOWA |
| 23 | Lucy Preston | 49 | WIFE | — | INDIANA |
| 24 | Frank Preston | 21 | SON | — | IOWA |
| 25 | Mary Belle Preston THIS PERSON | 19 | DAUGHTER | — | WASHINGTON |
| 26 | Anna Preston | 15 | DAUGHTER | — | WASHINGTON |
| 27 | Jean Preston | 10 | DAUGHTER | — | WASHINGTON |
| 28 | Carolyn H. Nance | 60 | HEAD | Secretary | OREGON |
| 29 | Iva B. Nance | 34 | DAUGHTER | — | TEXAS |
| 30 | Martha Gillies | 62 | HEAD | — | IOWA |
| 31 | Pearl Wenmhoefer | 18 | HEAD | Saleslady | WASHINGTON |
| 32 | Harriet Geithmann | 55 | HEAD | Writer | NEW YORK |
| 33 | Anna May Eicher | 20 | MAID | Maid | WASHINGTON |
| 34 | Edna S. Lord | 56 | HEAD | Rental | NEBRASKA |
| 35 | Beatrice Plass | 42 | HEAD | Dressmaking | WASHINGTON |
| 36 | Roberta Burch | 42 | PARTNER | Dressmaking | ILLINOIS |
| 37 | Dorothy Fisk | 37 | BOARDER | Clerk | MISSOURI |
| 38 | Donald Fisk | 11 | SON | — | WASHINGTON |
| 39 | Arthur Stanley | 49 | BOARDER | Carpenter | NORTH DAKOTA |
| 40 | Robert Kavaney | 24 | BOARDER | Mechanic | MONTANA |
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)