MD
Mamie Davis — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Pierce-County, Washington
Our Model Tree links this Mamie Davis across the 1920, 1930 and 1940 US Censuses in Pierce-County, Washington (XGBoost, ~Confirmed) — first a spouse (b.~1876), then head of a 3-person household.
Age 64
b. ~1876
Female
Spouse
Born: Michigan
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Pierce-County, Washington |
| Surname | Davis |
| Given Name | Mamie M. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 64 |
| Marital Status | Married |
| Birthplace | Michigan |
| 1935 Residence (City) | Lake Bay Prec't |
| 1935 Residence (County) | Pierce |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
| Township / Ward | Lake Bay Prect |
| Est. Birth Year | ~1876 |
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 Mamie | Age | Birth yr |
|---|---|---|---|---|
| Joyce Welch | Daughter | — | 9 | ~1931 |
| John Davis | Head | — | 72 | ~1868 |
| Mamie Davis | Spouse | — | 64 | ~1876 |
Census Appearances
1920
Pierce, Washington
Spouse, age 43
Pierce, Washington · implied b. ~1877 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Davis |
| Given Name | Mamie M |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 43 |
| Marital Status | Married |
| Birthplace | Michigan |
| Father's Birthplace | Canada |
| Mother's Birthplace | Canada |
| Speaks English | Yes |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
1930
Pierce, Washington
Other, age 54
Pierce, Washington · implied b. ~1876 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Davis |
| Given Name | Mamie M. |
| Relationship to Head | Wife-H |
| Sex | F |
| Color / Race | White |
| Age | 54 |
| Marital Status | Married |
| Birthplace | Michigan |
| Age at First Marriage | 21 |
| Father's Birthplace | Canada English |
| Mother's Birthplace | Canada |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
1940
Pierce-County, Washington
Spouse, age 64
Pierce-County, Washington · implied b. ~1876 — 3 household members
| Surname | Davis |
| Given Name | Mamie M. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 64 |
| Marital Status | Married |
| Birthplace | Michigan |
| 1935 Residence (City) | Lake Bay Prec't |
| 1935 Residence (County) | Pierce |
| Income (1939) | 0 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
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 Mamie Davis across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Mamie Davis
Spouse · 1940 · age 64 · b. ~1876 · Washington
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Pierce-County, Washington
Open full size
1940 US Federal Census — Pierce-County, Washington
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-04355-01073)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Marjorie Mathew | 26 | Wife | — | Washington |
| 42 | John S. Mccoy | 58 | Head | Farmer | Kansas |
| 43 | Anna S. Mccoy | 58 | Wife | — | Massachusetts |
| 44 | Karin Mccoy | 20 | Daughter | — | Missouri |
| 45 | Leila Mccoy | 17 | Daughter | — | Washington |
| 46 | Arthur W. Mccoy | 63 | Head | — | Wisconsin |
| 47 | Andrew Nystrom | 39 | Head | Hoist Engineer | Arizona |
| 48 | Frank Gill | 61 | Head | Caretaker | Kansas |
| 49 | Martin Brown | 36 | Head | Fireman | Kansas |
| 50 | Edna Brown | 32 | Wife | — | Oregon |
| 51 | Martin F. Brown | 14 | Son | — | Washington |
| 52 | Pearl M. Brown | 13 | Daughter | — | Washington |
| 53 | Esther G. Brown | 11 | Daughter | — | Washington |
| 54 | Donna J. Brown | 9 | Daughter | — | Washington |
| 55 | Earl Brown | 5 | Son | — | Washington |
| 56 | Delbert Brown | 5 | Son | — | Washington |
| 57 | Ray Brown | 1 | Son | — | Washington |
| 58 | John A. Davis | 72 | Head | — | Iowa |
| 59 | Mamie M. Davis THIS PERSON | 64 | Wife | — | Michigan |
| 60 | Joyce Welch | 9 | Daughter | — | Washington |
| 61 | Samuel Ramidell | 58 | Head | — | Washington |
| 62 | Rose Ramidell | 41 | Wife | — | Oregon |
| 63 | Violet Ramidell | 18 | Daughter | — | Washington |
| 64 | William Ramidell | 17 | Son | — | Washington |
| 65 | John H. Ramidell | 10 | Son | — | Washington |
| 66 | Leslie B. Ramidell | 8 | Son | — | Washington |
| 67 | Miles P. Ramidell | 7 | Son | — | Washington |
| 68 | Grace M. Ramidell | 2 | Daughter | — | Washington |
| 69 | James Ramidell | 20 | Head | Laborer | Washington |
| 70 | Mable Ramidell | 19 | Wife | — | Washington |
| 71 | James Ramidell | 2 | Son | — | Washington |
| 72 | William Thoberg | 30 | Head | Seaman | Sweden |
| 73 | Florence Thoberg | 28 | Wife | — | Washington |
| 74 | Patricia Thoberg | 3 | Daughter | — | Washington |
| 75 | Carol Thoberg | 0 | Daughter | — | Washington |
| 76 | G. Aurel Allis | 67 | Head | — | New York |
| 77 | Albert W. Smith | 43 | Head | Carpenter | New Jersey |
| 78 | Alfreda Smith | 31 | Wife | — | Washington |
| 79 | Hjalmer C. Bergerson | 57 | Head | Carpenter | Illinois |
| 80 | Lorena Bergerson | 52 | Wife | — | Illinois |
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)