FD
Frank Day — 1940 US Census Record
Model Tree available1940 United States Federal Census · Adair-County, Iowa
Our Model Tree links this Frank Day across the 1920, 1930 and 1940 US Censuses in Adair-County, Iowa (XGBoost, ~Confirmed), with identified parents William & William — first a son (b.~1919), then head of a 5-person household.
Age 21
b. ~1919
Male
Son
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Adair-County, Iowa |
| Surname | Day |
| Given Name | Frank |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Adair |
| Additional Details | |
| Occupation | New worker |
| Class of Worker | PW |
| Hours Worked | 60 |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Iowa |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | New Worker |
| Township / Ward | Bridgewater Town |
| Est. Birth Year | ~1919 |
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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Frank | Age | Birth yr |
|---|---|---|---|---|
| Lilly Day | Head | — | 37 | ~1903 |
| Charley Day | Son | — | 24 | ~1916 |
| Clarence Day | Son | — | 10 | ~1930 |
| Harold Day | Son | — | 17 | ~1923 |
| Frank Day | Son | — | 21 | ~1919 |
Census Appearances
1920
Adair, Iowa
Son, age 1
Adair, Iowa · implied b. ~1919 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Day |
| Given Name | Frank J. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Adair, Iowa
Son, age 11
Adair, Iowa · implied b. ~1919 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Day |
| Given Name | Frank J |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Adair-County, Iowa
Son, age 21
Adair-County, Iowa · implied b. ~1919 — 5 household members
| Surname | Day |
| Given Name | Frank |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Adair |
| Occupation | New worker |
| Class of Worker | PW |
| Hours Worked | 60 |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Iowa |
| 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 Frank Day across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father William Day (~0.92 confidence) and father William Day (~0.92 confidence) and mother Lilly Day (~0.92 confidence) and mother Lilly Day (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
William Day
b. ~1880
Source father
● Household
· direct · ~0.92
Father
William Day
b. ~1878
Source father
● Household
· direct · ~0.92
Mother
Lilly Day
b. ~1887
Source mother
● Household
· direct · ~0.92
Mother
Lilly Day
b. ~1903
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Frank Day
Son · 1940 · age 21 · b. ~1919 · Iowa
★ You are viewing this record
Sibling
Clarence Day
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Harold Day
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Charley Day
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 — Adair-County, Iowa
Open full size
1940 US Federal Census — Adair-County, Iowa
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-01136-00047)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Elias Bower | 79 | Head | — | Illinois |
| 42 | Onnie Bower | 68 | Wife | — | Ohio |
| 43 | John C. Bross | 44 | Head | — | Iowa |
| 44 | Leona E. Bross | 44 | Wife | Publisher | South Dak. |
| 45 | Sarah Hardie | 62 | Ab Head | — | Iowa |
| 46 | Emma Strong | 71 | Ab Head | — | Iowa |
| 47 | Lilly Day | 37 | Head | Housekeeping | Oklahoma |
| 48 | Harold Day | 17 | Son | — | Iowa |
| 49 | Clarence Day | 10 | Son | — | Iowa |
| 50 | Charley Day | 24 | Son | Laborer | Iowa |
| 51 | Frank Day THIS PERSON | 21 | Son | New Worker | Iowa |
| 52 | John H. Conaway | 58 | Head | Laborer | Iowa |
| 53 | Marjorie Conaway | 50 | Wife | Forestry | Iowa |
| 54 | George Herrick | 50 | Head | Physician | Iowa |
| 55 | Pearl Herrick | 48 | Wife | — | Iowa |
| 56 | Colden Herrick | 18 | Daughter | Manager | Iowa |
| 57 | Betty Herrick | 17 | Daughter | — | Iowa |
| 58 | Jack Herrick | 12 | Son | — | Iowa |
| 59 | Peter Baver | 76 | Head | — | Illinois |
| 60 | Coral Baver | 60 | Wife | — | Iowa |
| 61 | Charles Wyllie | 27 | Head | Laborer | Iowa |
| 62 | Helen Wyllie | 22 | Wife | — | Iowa |
| 63 | Dean Wyllie | 3 | Son | — | Iowa |
| 64 | Carl Wyllie | 1 | Son | — | Iowa |
| 65 | Melvin Sents | 27 | Brother-in-law | Station Attendant | Iowa |
| 66 | Alice Sents | 26 | Sister-in-law | Housekeeping | Iowa |
| 67 | Doris Archer | 44 | Head | — | Iowa |
| 68 | Virginia Archer | 18 | Daughter | New Worker | Iowa |
| 69 | Vernon Archer | 18 | Son | Salesman | Iowa |
| 70 | Raymond D. Snyder | 37 | Head | Operator | Iowa |
| 71 | Ida Snyder | 36 | Wife | — | Iowa |
| 72 | Carolyn Snyder | 13 | Daughter | — | Iowa |
| 73 | Robert Snyder | 11 | Son | — | Iowa |
| 74 | Everett Archer | 23 | Head | Truck Operator | Iowa |
| 75 | Irene Archer | 30 | Wife | — | Iowa |
| 76 | Lena Reyn | 63 | Head | — | Illinois |
| 77 | Fred Reyn | 32 | Son | — | Iowa |
| 78 | Sophia Schultz | 80 | Head | — | Minnesota |
| 79 | William Schultz | 53 | Son | Salesman | Nebraska |
Related Census Records
Pedigree Summary
Frank + 3 siblings
Gen 1 · 4 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)