MC
Mary Cook — 1920 US Census Record
Linked across censuses1920 United States Federal Census · Mendocino, California
Our Model Tree links this Mary Cook across the 1900, 1910 and 1920 US Censuses in Mendocino, California (XGBoost, ~Confirmed) — first a head (b.~1840), then head of a 2-person household.
Age 80
b. ~1840
Female
Head
Born: Missouri
Widowed
1920 Census Record Details
| Census Year | 1920 |
| Location | Mendocino, California |
| Surname | Cook |
| Given Name | Mary E. |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 80 |
| Marital Status | Widowed |
| Birthplace | Missouri |
| Father's Birthplace | Kentucky |
| Mother's Birthplace | Kentucky |
| Additional Details | |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Home Owned/Rented | O |
| Home Free/Mortgaged | F |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
| Township / Ward | Precinct 1 |
| Est. Birth Year | ~1840 |
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.
2 people recorded at the same address in the 1920 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Cook | Head | — | 80 | ~1840 |
| Wade Cook | Son | — | 48 | ~1872 |
Census Appearances
1900
Mendocino, California
Head, age 61
Mendocino, California · implied b. ~1839 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cook |
| Given Name | Mary E. |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 61 |
| Marital Status | Widowed |
| Birthplace | Missouri |
| Birth Month | Apr |
| Birth Year | 1839 |
| Father's Birthplace | Kentucky |
| Mother's Birthplace | Kentucky |
| Occupation | Nurse |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
1910
Mendocino, California
Head, age 70
Mendocino, California · implied b. ~1840 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cook |
| Given Name | Mary E. |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 70 |
| Marital Status | Widowed |
| Birthplace | Missouri |
| Children Born | 8 |
| Children Living | 5 |
| Father's Birthplace | Kentucky |
| Mother's Birthplace | Kentucky |
| Occupation | Own Income |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | English |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
1920
Mendocino, California
Head, age 80
Mendocino, California · implied b. ~1840 — 2 household members
| Surname | Cook |
| Given Name | Mary E. |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 80 |
| Marital Status | Widowed |
| Birthplace | Missouri |
| Father's Birthplace | Kentucky |
| Mother's Birthplace | Kentucky |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Home Owned/Rented | O |
| Home Free/Mortgaged | F |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
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 Cook across 3 US Census years (1900, 1910 and 1920) in Mendocino, California, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Cook
Head · 1920 · age 80 · b. ~1840 · California
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1920 US Federal Census — Mendocino, California
Open full size
1920 US Federal Census — Mendocino, California
Page Contents
50 people indexed on this census page (ia:1920:14thcensusofpopu121unit:0201)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Annie Perryman | 65 | Mother-in-law | — | England |
| 2 | James M. Turner | 44 | Head | Owner & Mgr. | California |
| 3 | Ethel P. Turner | 38 | Wife | — | California |
| 4 | Annie A. Turner | 10 | Daughter | — | California |
| 5 | James H. Heap | 48 | Head | Electrician | Illinois |
| 6 | Elizabeth Heap | 37 | Wife | — | California |
| 7 | John R. Heap | 16 | Son | Electrician | California |
| 8 | Clara E. Heap | 11 | Daughter | — | California |
| 9 | John J. Keller | 43 | Head | Salesman | Minnesota |
| 10 | Iva G. Keller | 35 | Wife | — | Missouri |
| 11 | Richard S. Keller | 6 | Son | — | California |
| 12 | Sarah M. Foster | 71 | Head | — | Iowa |
| 13 | Fred H. Loring | 48 | Head | House Painter | Minnesota |
| 14 | Estelle M. Loring | 47 | Wife | — | New York |
| 15 | Beatrice D. Shimmin | 16 | Step-daughter | — | California |
| 16 | Sophronia H. Jarvis | 78 | Mother-in-law | — | New York |
| 17 | Mary E. Cook THIS PERSON | 80 | Head | — | Missouri |
| 18 | Wade F. Cook | 48 | Son | — | Pennsylvania |
| 19 | William A. St. Louis | 42 | Head | Carpenter | Canada |
| 20 | Mary E. St. Louis | 41 | Wife | — | Oregon |
| 21 | Oliver W. St. Louis | 13 | Son | — | California |
| 22 | Benjamin F. St. Louis | 12 | Son | — | California |
| 23 | Edward H. Roth | 57 | Head | Agent | Minnesota |
| 24 | Lena Roth | 55 | Wife | — | Minnesota |
| 25 | Alice C. Roth | 17 | Daughter | — | Minnesota |
| 26 | Samuel Biegler | 54 | Head | Dealer | Austria |
| 27 | Allen Davidson | 75 | Head | — | New York |
| 28 | Jerusha Davidson | 73 | Wife | — | New York |
| 29 | Mabel Brown | 34 | Daughter | — | California |
| 30 | Frank A. Clark | 46 | Head | Conductor | Maine |
| 31 | Georgia A. Clark | 41 | Wife | — | California |
| 32 | Bernice A. Clark | 14 | Daughter | — | California |
| 33 | Alta L. Clark | 12 | Daughter | — | California |
| 34 | Adelbert F. Clark | 7 | Son | — | California |
| 35 | Eleanor G. Clark | 4 | Daughter | — | California |
| 36 | Robert W. Clark | 1 | Son | — | California |
| 37 | George B. Nillite | 54 | Head | Salesman | California |
| 38 | Ella I. Nillite | 47 | Wife | — | California |
| 39 | Thomas S. Young | 65 | Head | — | Iowa |
| 40 | Emma A. Young | 56 | Wife | — | California |
| 41 | Dora G. Young | 23 | Daughter | Stenographer | California |
| 42 | Nylas M. Young | 20 | Daughter | — | California |
| 43 | Lloyd J. Smith | 29 | Head | Clergyman | Nebraska |
| 44 | Emma B. Smith | 29 | Wife | — | California |
| 45 | Ivan A. Smith | 5 | Son | — | California |
| 46 | Leonard H. Smith | 2 | Son | — | California |
| 47 | Sarah Mckinley | 65 | Head | Practical Nurse | Missouri |
| 48 | James J. Dunna | 60 | Head | Laborer | Pennsylvania |
| 49 | Carrie L. Dunna | 46 | Wife | — | Minnesota |
| 50 | Eugene H. Dunna | 24 | Son | Teacher | California |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1920 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)