MC
Mary Cook — 1940 US Census Record
Model Tree available1940 United States Federal Census · Rooks-County, Kansas
Our Model Tree links this Mary Cook across the 1920, 1930 and 1940 US Censuses in Rooks-County, Kansas (XGBoost, ~Confirmed), with identified parents W & William — first a daughter (b.~1897), then head of a 3-person household.
Age 43
b. ~1897
Female
Daughter
Born: Nebraska
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Rooks-County, Kansas |
| Surname | Cook |
| Given Name | Mary E |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 43 |
| Marital Status | Single |
| Birthplace | Nebraska |
| 1935 Residence (City) | Alcona township |
| 1935 Residence (County) | Rooks |
| Additional Details | |
| Occupation | Teacher |
| Industry | School |
| Class of Worker | NP |
| Income (1939) | 0 |
| Highest Grade | H-4 |
| 1935 Residence | Same place |
| Birth State | Nebraska |
| Birth Country | United States |
| Birthplace (normalized) | nebraska |
| Occupation | Teacher |
| Township / Ward | Alcona Township |
| Est. Birth Year | ~1897 |
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 Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Cook | Daughter | — | 43 | ~1897 |
| William Cook | Head | — | 52 | ~1888 |
| Daniel Cook | Son | — | 38 | ~1902 |
Census Appearances
1920
Rooks, Kansas
Daughter, age 23
Rooks, Kansas · implied b. ~1897 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cook |
| Given Name | Mary E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Nebraska |
| Father's Birthplace | Kansas |
| Mother's Birthplace | Kansas |
| Occupation | Teacher |
| Industry | Country School |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Nebraska |
| Birth Country | United States |
| Birthplace (normalized) | nebraska |
1930
Rooks, Kansas
Daughter, age 33
Rooks, Kansas · implied b. ~1897 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cook |
| Given Name | Mary E |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 33 |
| Marital Status | Single |
| Birthplace | Nebraska |
| Father's Birthplace | Kansas |
| Mother's Birthplace | Kansas |
| Occupation | Teacher |
| Industry | Public School |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Nebraska |
| Birth Country | United States |
| Birthplace (normalized) | nebraska |
1940
Rooks-County, Kansas
Daughter, age 43
Rooks-County, Kansas · implied b. ~1897 — 3 household members
| Surname | Cook |
| Given Name | Mary E |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 43 |
| Marital Status | Single |
| Birthplace | Nebraska |
| 1935 Residence (City) | Alcona township |
| 1935 Residence (County) | Rooks |
| Occupation | Teacher |
| Industry | School |
| Class of Worker | NP |
| Income (1939) | 0 |
| Highest Grade | H-4 |
| 1935 Residence | Same place |
| Birth State | Nebraska |
| Birth Country | United States |
| Birthplace (normalized) | nebraska |
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 (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father W Cook (~0.92 confidence) and father William Cook (~0.60 confidence) and mother Ida Cook (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.81
Father
W Cook
b. ~1858
Source father
● Household
· direct · ~0.92
Father
William Cook
b. ~1888
Source father
● Household
· direct · ~0.6
Mother
Ida Cook
b. ~1864
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Cook
Daughter · 1940 · age 43 · b. ~1897 · Kansas
★ You are viewing this record
Sibling
Daniel Cook
Sibling · 1940 · age 38
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 — Rooks-County, Kansas
Open full size
1940 US Federal Census — Rooks-County, Kansas
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01256-00631)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | George H Bryant | 37 | Head | Farmer | Kansas |
| 2 | Muriel M Bryant | 31 | Wife | — | Kansas |
| 3 | Frederick J Timmons | 81 | Head | Farmer | Ohio |
| 4 | Elizabeth H Timmons | 80 | Wife | — | Missouri |
| 5 | James H Sammons | 57 | Head | Farmer | Kansas |
| 6 | Mary M Sammons | 54 | Wife | — | Kansas |
| 7 | Eula M Sammons | 27 | Daughter | — | Kansas |
| 8 | Harley M Sammons | 19 | Son | Farmer | Kansas |
| 9 | William R Sammons | 18 | Son | Farmer | Kansas |
| 10 | John L Sammons | 26 | Head | Farmer | Kansas |
| 11 | Dorothy L Sammons | 23 | Wife | — | Kansas |
| 12 | Harry E Sammons | 31 | Head | Farmer | Kansas |
| 13 | Alta I Sammons | 31 | Wife | — | Kansas |
| 14 | Irene I Sammons | 9 | Daughter | — | Kansas |
| 15 | Charles S Moore | 42 | Head | Farmer | Missouri |
| 16 | Jessie D Moore | 51 | Wife | — | Kansas |
| 17 | William J Moore | 21 | Son | — | Kansas |
| 18 | Donna M Moore | 7 | Daughter | — | Kansas |
| 19 | James M Moore | 75 | Father | — | Indiana |
| 20 | Donald A Fetterolf | 44 | Head | Farmer | Kansas |
| 21 | Daisy A Fetterolf | 39 | Wife | — | Kansas |
| 22 | Chester L Bennet | 19 | Step-son | Salesman | Colorado |
| 23 | James E Bennet | 18 | Step-son | Pin Setter | Colorado |
| 24 | Violetta D Bennet | 16 | Step-Daughter | — | Kansas |
| 25 | Johnie A Fetterolf | 2 | Son | — | Kansas |
| 26 | Tom Smith | 30 | Head | Tractor Engine | Okla |
| 27 | Ninnie M Smith | 31 | Wife | — | Nebraska |
| 28 | William J Cook | 52 | Head | Farmer | Kansas |
| 29 | Mary E Cook THIS PERSON | 43 | Daughter | Teacher | Nebraska |
| 30 | Daniel F Cook | 38 | Son | Farmer | Kansas |
| 31 | Henry Holman | 60 | Head | Farmer | Ohio |
| 32 | Nettie Holman | 54 | Wife | — | Kansas |
| 33 | Oscar A Brault | 34 | Head | Farmer | Kansas |
| 34 | Hazel L Brault | 31 | Wife | — | Kansas |
| 35 | Patricia Brault | 1 | Daughter | — | Kansas |
| 36 | Ray L Hess | 54 | Head | Farmer | Kansas |
| 37 | Elmer E Shewart | 45 | Head | Farmer | Kansas |
| 38 | Arline A Shewart | 22 | Daughter | — | Kansas |
| 39 | Naomi N Shewart | 17 | Daughter | Housekeeper | Kansas |
| 40 | George Holeman | 45 | Head | Farmer | Missouri |
Pedigree Summary
Mary + 1 sibling
Gen 1 · 3 parents
~0.81
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)