MC
Mildred Cook — 1940 US Census Record
Model Tree available1940 United States Federal Census · Rock-Island-County, Illinois
Our Model Tree links this Mildred Cook across the 1920, 1930 and 1940 US Censuses in Rock-Island-County, Illinois (XGBoost, ~Confirmed), with identified parents Fred & Blanche — first a daughter (b.~1918), then head of a 4-person household.
Age 22
b. ~1918
Female
Daughter
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Rock-Island-County, Illinois |
| Surname | Cook |
| Given Name | Mildred G. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Rock Island |
| 1935 Residence (County) | Rock Island |
| Additional Details | |
| Occupation | Beautician |
| Industry | Beauty Shop |
| Class of Worker | PW |
| Hours Worked | 60 |
| Income (1939) | 1200 |
| Highest Grade | No H4 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Beautician |
| Township / Ward | Rock Island |
| Est. Birth Year | ~1918 |
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 Mildred | Age | Birth yr |
|---|---|---|---|---|
| Lucille Cook | Daughter | — | 24 | ~1916 |
| Fred Cook | Head | — | 63 | ~1877 |
| Mildred Cook | Daughter | — | 22 | ~1918 |
| Blanche Cook | Spouse | — | 57 | ~1883 |
Census Appearances
1920
Rock Island, …
Daughter, age 3
Rock Island, Illinois · implied b. ~1917
●
Primary link
· ~Confirmed · 1 source
XGBoost
| Surname | Cook |
| Given Name | Mildred |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Occupation | none |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Rock Island, …
Daughter, age 13
Rock Island, Illinois · implied b. ~1917 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cook |
| Given Name | Mildred |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Rock-Island-County, Illinois
Daughter, age 22
Rock-Island-County, Illinois · implied b. ~1918 — 4 household members
| Surname | Cook |
| Given Name | Mildred G. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Rock Island |
| 1935 Residence (County) | Rock Island |
| Occupation | Beautician |
| Industry | Beauty Shop |
| Class of Worker | PW |
| Hours Worked | 60 |
| Income (1939) | 1200 |
| Highest Grade | No H4 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
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 Mildred Cook across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Fred Cook (~0.92 confidence) and mother Blanche Cook (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Fred Cook
b. ~1877
Source father
● Household
· direct · ~0.92
Mother
Blanche Cook
b. ~1883
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mildred Cook
Daughter · 1940 · age 22 · b. ~1918 · Illinois
★ You are viewing this record
Sibling
Lucille Cook
Sibling · 1940 · age 24
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 — Rock-Island-County, Illinois
Open full size
1940 US Federal Census — Rock-Island-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00877-00008)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Norma J. Rhuck | 13 | Daughter | — | Missouri |
| 42 | Henry C. Rhuck | 56 | Brother | Laborer | Missouri |
| 43 | Lester J. Wilder | 21 | Head | Clerk | Illinois |
| 44 | Jeanice D. Wilder | 23 | Wife | — | Illinois |
| 45 | Barbara A. Wilder | 1 | Daughter | — | Illinois |
| 46 | Sandra J. Wilder | 0 | Daughter | — | Illinois |
| 47 | Doris J. Wright | 11 | Lodger | — | Illinois |
| 48 | Kurt Breiter | 65 | Lodger | Watchman | Germany |
| 49 | Marshal Whitbeck | 51 | Head | — | Illinois |
| 50 | Mary J. Whitbeck | 58 | Wife | — | Illinois |
| 51 | Mildred Gotthardt | 23 | Step-daughter | New Worker | Illinois |
| 52 | John T. Kinnamon | 41 | Step-son-in-law | Bartender | Missouri |
| 53 | Evelyn L. Kinnamon | 40 | Step-daughter | — | Illinois |
| 54 | Robert Gates | 23 | Step-grandson | Janitor | Iowa |
| 55 | Barbara Young | 5 | Lodger | — | Illinois |
| 56 | Helen Young | 3 | Lodger | — | Illinois |
| 57 | Walter F. Gates | 27 | Head | Mechanic | Illinois |
| 58 | Margaret A. Gates | 28 | Wife | — | Illinois |
| 59 | Dolores M. Gates | 8 | Daughter | — | Illinois |
| 60 | Betty J. Gates | 6 | Daughter | — | Illinois |
| 61 | Richard L. Young | 0 | Lodger | — | Illinois |
| 62 | Earl W. Young | 45 | Head | Brakeman | Illinois |
| 63 | Rosie N. Young | 43 | Wife | — | Illinois |
| 64 | Fay P. Teter | 35 | Head | Machine Oper. | Missouri |
| 65 | Bertha R. Teter | 34 | Wife | — | Indiana |
| 66 | Fay G. Teter | 14 | Son | — | Missouri |
| 67 | Bonnie L. Teter | 12 | Daughter | — | Missouri |
| 68 | Norman K. Teter | 8 | Son | — | Illinois |
| 69 | Herbert M. Frost | 34 | Head | Order Checker | Wisconsin |
| 70 | Ruth H. Frost | 38 | Wife | — | Iowa |
| 71 | Robert M. Frost | 7 | Son | — | Illinois |
| 72 | Elaine M. Frost | 1 | Daughter | — | Illinois |
| 73 | Emery R. Curtis | 18 | Step-son | — | Iowa |
| 74 | Fred G. Cook | 63 | Head | Oiler & Mach Rep | Iowa |
| 75 | Blanche L. Cook | 57 | Wife | — | Iowa |
| 76 | Lucille J. Cook | 24 | Daughter | New Worker | Iowa |
| 77 | Mildred G. Cook THIS PERSON | 22 | Daughter | Beautician | Iowa |
| 78 | William J. Fuller | 35 | Head | Agent | Illinois |
| 79 | Margaret A. Fuller | 37 | Wife | — | Illinois |
| 80 | Barbara J. Fuller | 12 | Daughter | — | Illinois |
Related Census Records
Pedigree Summary
Mildred + 1 sibling
Gen 1 · 2 parents
~0.92
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)