MP
Mary Peck — 1940 US Census Record
Linked across censuses1940 United States Federal Census · King-County, Washington
Our Model Tree links this Mary Peck across the 1930 and 1940 US Censuses in King-County, Washington (XGBoost, ~Confirmed) — first a spouse (b.~1892), then head of a 4-person household.
Age 48
b. ~1892
Female
Spouse
Born: Pennsylvania
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | King-County, Washington |
| Surname | Peck |
| Given Name | Mary E. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 48 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Seattle City |
| 1935 Residence (County) | King |
| Additional Details | |
| Industry | 0 |
| Highest Grade | C 3 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Township / Ward | Seattle City |
| Est. Birth Year | ~1892 |
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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Dwight Peck | Head | — | 55 | ~1885 |
| Mary Peck | Daughter | — | 19 | ~1921 |
| Mary Peck | Spouse | — | 48 | ~1892 |
| John Peck | Son | — | 13 | ~1927 |
Census Appearances
1930
King, Washington
Other, age 38
King, Washington · implied b. ~1892 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Pech |
| Given Name | Mary |
| Relationship to Head | Wife-H |
| Sex | F |
| Color / Race | White |
| Age | 38 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| Age at First Marriage | 23 |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
King-County, Washington
Spouse, age 48
King-County, Washington · implied b. ~1892 — 4 household members
| Surname | Peck |
| Given Name | Mary E. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 48 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Seattle City |
| 1935 Residence (County) | King |
| Industry | 0 |
| Highest Grade | C 3 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
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 Peck across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Mary Peck
Spouse · 1940 · age 48 · b. ~1892 · Washington
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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-t0627-04383-00969)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Donna Negri | 5 | daughter | — | Washington |
| 2 | Frederick Simmons | 31 | Head | Service Manager | Colorado |
| 3 | Mabel B. Simmons | 33 | wife | — | California |
| 4 | Ross Simmons | 4 | son | — | Washington |
| 5 | Archie T. Brown | 53 | Head | Stone Mason | Kansas |
| 6 | May A. Brown | 58 | Wife | — | Colorado |
| 7 | Carl J. Holtman | 42 | Head | Delivery Man | Minnesota |
| 8 | Mabel Holtman | 35 | wife | Inspector | Minnesota |
| 9 | Clayton Holtman | 19 | son | Errand Boy | Minnesota |
| 10 | Marshall A. Holtman | 17 | daughter | — | Minnesota |
| 11 | Ronald Holtman | 7 | son | — | Washington |
| 12 | R. J. Cooper | 61 | Head | Plasterer | Ireland |
| 13 | Gertrude B. Cooper | 52 | wife | — | England |
| 14 | Ethel Cooper | 30 | daughter | Comptometer | Washington |
| 15 | James Cooper | 28 | son | Plasterer | Washington |
| 16 | Dwight Peck | 55 | Head | Passenger Agent | Wisconsin |
| 17 | Mary E. Peck THIS PERSON | 48 | Wife | — | Pennsylvania |
| 18 | Mary C. Peck | 19 | daughter | — | Washington |
| 19 | John A. Peck | 13 | son | — | Washington |
| 20 | Phoebe B. Blalock | 45 | Head | Teacher | Washington |
| 21 | Lillian B. Blalock | 79 | mother | — | Illinois |
| 22 | Winifred Burd | 52 | Head | Teacher | Wisconsin |
| 23 | Emanuel Lindholm | 53 | Head | Contractor | Denmark |
| 24 | Anna Lindholm | 54 | wife | — | Denmark |
| 25 | Harold Lindholm | 20 | son | Floor Layer | Washington |
| 26 | Arthur Lindholm | 18 | son | Floor Layer | Washington |
| 27 | Thomas Head Jones | 30 | Head | Mechanic | Washington |
| 28 | Miriam B. Jones | 27 | Wife | — | Washington |
| 29 | Thomas Jr. Jones | 5 | son | — | Washington |
| 30 | Susan Jones | 1 | daughter | — | Washington |
| 31 | Arthur Heugan | 36 | Head | Lawyer | North Dakota |
| 32 | Jennie Heugan | 39 | wife | — | North Dakota |
| 33 | Joanne Heugan | 6 | daughter | — | Washington |
| 34 | Barbara Heugan | 3 | daughter | — | Washington |
| 35 | Lere Enda Heugan | 26 | sister | — | North Dakota |
| 36 | Grant Beeching | 72 | Head | — | Indiana |
| 37 | Emma B. Beeching | 64 | wife | — | Norway |
| 38 | Frank Johnson | 29 | Head | Sheet Metal Mechanic | Sweden |
| 39 | Hattie B. Johnson | 28 | wife | — | Oregon |
| 40 | William Johnson | 10 | son | — | Oregon |
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)