NC
Nellie Cook — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Jefferson-County, Iowa
Our Model Tree links this Nellie Cook across the 1930 and 1940 US Censuses in Jefferson-County, Iowa (XGBoost, ~Confirmed) — first a spouse (b.~1890), then head of a 7-person household.
Age 50
b. ~1890
Female
Spouse
Born: Iowa
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Jefferson-County, Iowa |
| Surname | Cook |
| Given Name | Nellie |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 50 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Center twp |
| 1935 Residence (County) | Jefferson |
| Additional Details | |
| Highest Grade | G-8 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Township / Ward | Center Twp |
| Est. Birth Year | ~1890 |
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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Nellie | Age | Birth yr |
|---|---|---|---|---|
| John Cook | Son | — | 10 | ~1930 |
| Jasper Cook | Son | — | 15 | ~1925 |
| Nellie Cook | Spouse | — | 50 | ~1890 |
| Donald Cook | Son | — | 29 | ~1911 |
| Roy Cook | Head | — | 44 | ~1896 |
| Willadean Cook | Daughter | — | 12 | ~1928 |
| Geraldine Cook | Daughter | — | 14 | ~1926 |
Census Appearances
1930
Jefferson, Iowa
Spouse, age 42
Jefferson, Iowa · implied b. ~1888 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cook |
| Given Name | Nellie |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 42 |
| Marital Status | Married |
| Birthplace | Iowa |
| Age at First Marriage | 18 |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Iowa |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Jefferson-County, Iowa
Spouse, age 50
Jefferson-County, Iowa · implied b. ~1890 — 7 household members
| Surname | Cook |
| Given Name | Nellie |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 50 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Center twp |
| 1935 Residence (County) | Jefferson |
| Highest Grade | G-8 |
| 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 Nellie Cook across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Nellie Cook
Spouse · 1940 · age 50 · b. ~1890 · Iowa
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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 — Jefferson-County, Iowa
Open full size
1940 US Federal Census — Jefferson-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01170-00056)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | May B. Carlson | 41 | Head | Clerk | Iowa |
| 2 | Jack Carlson | 18 | Son | Labor | Iowa |
| 3 | Mary R. Carlson | 9 | Daughter | — | Iowa |
| 4 | Glenn Keltner | 29 | Boarder | Labor | Iowa |
| 5 | Oscar Page | 63 | Head | — | Iowa |
| 6 | George A. Gardner | 49 | Head | Labor | Wisconsin |
| 7 | Stella Gardner | 59 | Wife | — | Iowa |
| 8 | Fred Edler | 59 | Head | Labor | Iowa |
| 9 | Henry Hagen | 53 | Head | Labor | Missouri |
| 10 | Sara B. Hagen | 45 | Wife | Labor | Iowa |
| 11 | Joel H. Rhoades | 30 | Head | Labor | Iowa |
| 12 | Jane B. Rhoades | 20 | Wife | — | Iowa |
| 13 | Fred Harger | 52 | Head | — | Missouri |
| 14 | Elizabeth Harger | 55 | Wife | — | Indiana |
| 15 | Vergil Stinepring | 33 | Step son | Labor | Illinois |
| 16 | Ruby Langford | 14 | Nephew | — | Iowa |
| 17 | Alice Langford | 12 | Niece | — | Iowa |
| 18 | Charles Harger | 35 | Head | Labor | Missouri |
| 19 | William Lichtenstein | 72 | Boarder | Labor | Illinois |
| 20 | Roy R. Cook | 44 | Head | Labor | Iowa |
| 21 | Nellie Cook THIS PERSON | 50 | Wife | — | Iowa |
| 22 | Donald Cook | 29 | Son | Labor | Iowa |
| 23 | Jasper Cook | 15 | Son | Labor | Iowa |
| 24 | Geraldine Cook | 14 | Daughter | — | Iowa |
| 25 | Willadean Cook | 12 | Daughter | — | Iowa |
| 26 | John Cook | 10 | Son | — | Iowa |
| 27 | Dr. E. M. Myrick | 70 | Head | Invalid Unable To Work | Iowa |
| 28 | Nellie S. Myrick | 54 | Wife | — | Kansas |
| 29 | Glen Chezum | 51 | Head | Molder | Washington |
| 30 | Minnie Chezum | 46 | Wife | — | Iowa |
| 31 | Donald Chezum | 16 | Son | New Worker | Iowa |
| 32 | Ruth Chezum | 13 | Daughter | — | Iowa |
| 33 | John Chezum | 6 | Son | — | Iowa |
| 34 | Betty Chezum | 2 | Daughter | — | Iowa |
| 35 | Fred Arnold | 54 | Head | Feeds A Few Hog For A Living | Iowa |
| 36 | Amelia Jerrel | 73 | Head | — | Iowa |
| 37 | Fred Jerrel | 31 | Head | Labor | Iowa |
| 38 | Violet Jerrel | 25 | Wife | — | Iowa |
| 39 | Gerald Jerrel | 6 | Son | — | Iowa |
| 40 | Walter Cook | 37 | Head | Labor | Iowa |
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)