JK
John Knapp — 1940 US Census Record
Model Tree available1940 United States Federal Census · Coles-County, Illinois
Our Model Tree links this John Knapp across the 1920, 1930 and 1940 US Censuses in Coles-County, Illinois (XGBoost, ~Confirmed), with identified parents Walter & Josie — first a head (b.~1916), then head of a 4-person household.
Age 24
b. ~1916
Male
Head
Born: Illinois
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Coles-County, Illinois |
| Surname | Knapp |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 24 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Coles |
| Additional Details | |
| Occupation | Farm Laborer |
| Industry | Farm |
| Class of Worker | PW |
| Hours Worked | 60 |
| Income (1939) | 300 |
| Highest Grade | H-4 |
| 1935 Residence | Illinois |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Farm Laborer |
| Township / Ward | Seven Hickory Township |
| Est. Birth Year | ~1916 |
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 John | Age | Birth yr |
|---|---|---|---|---|
| Eileen Knapp | Spouse | — | 23 | ~1917 |
| Jeannine Knapp | Daughter | — | 1 | ~1939 |
| Jerry Knapp | Son | — | 4 | ~1936 |
| John Knapp | Head | — | 24 | ~1916 |
Census Appearances
1920
Coles, Illinois
Son, age 5
Coles, Illinois · implied b. ~1915 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Knapp |
| Given Name | John L. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Can Read | No |
| Speaks English | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Coles, Illinois
Son, age 15
Coles, Illinois · implied b. ~1915 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Knapp |
| Given Name | John L |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Coles-County, Illinois
Head, age 24
Coles-County, Illinois · implied b. ~1916 — 4 household members
| Surname | Knapp |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 24 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Coles |
| Occupation | Farm Laborer |
| Industry | Farm |
| Class of Worker | PW |
| Hours Worked | 60 |
| Income (1939) | 300 |
| Highest Grade | H-4 |
| 1935 Residence | Illinois |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
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 John Knapp across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Walter Knapp (~0.92 confidence) and mother Josie Knapp (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Walter Knapp
b. ~1889
Source father
● Household
· direct · ~0.92
Mother
Josie Knapp
b. ~1897
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Knapp
Head · 1940 · age 24 · b. ~1916 · Illinois
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Coles-County, Illinois
Open full size
1940 US Federal Census — Coles-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00771-01086)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Jean Winkleblack | 17 | Daughter | Newsworker | Illinois |
| 2 | John Knapp THIS PERSON | 24 | Head | Farm Laborer | Illinois |
| 3 | Eileen Knapp | 23 | Wife | — | Illinois |
| 4 | Jerry Knapp | 4 | Son | — | Illinois |
| 5 | Jeannine Knapp | 1 | Daughter | — | Illinois |
| 6 | Guy Nixon | 48 | Head | Farmer | Illinois |
| 7 | Anna Eula M Nixon | 49 | Wife | — | Illinois |
| 8 | Warren Nixon | 18 | Son | — | Illinois |
| 9 | Bert Oakley | 23 | Head | Farm Laborer | Illinois |
| 10 | Genevia Oakley | 26 | Wife | Heel Player | Illinois |
| 11 | Frank Craig | 65 | Head | Farmer | Illinois |
| 12 | Lula Craig | 60 | Wife | — | Illinois |
| 13 | Samuel T. Scott | 63 | Head | Farmer | Illinois |
| 14 | Pearl Scott | 48 | Wife | — | Illinois |
| 15 | Emma Craig | 61 | Head | — | Kentucky |
| 16 | Finis Craig | 28 | Son | Farmer | Illinois |
| 17 | Oscar Junior Craig | 18 | Son | Farm Laborer | Illinois |
| 18 | Dale E. Evans | 27 | Head | Farm Laborer | Illinois |
| 19 | Clara E. Evans | 19 | Wife | — | Illinois |
| 20 | Lloyd C. Evans | 7 | Son | — | Illinois |
| 21 | Gerald S. Evans | 6 | Son | — | Illinois |
| 22 | Dale Jr. Evans | 3 | Son | — | Illinois |
| 23 | Pattyann Evans | 1 | Daughter | — | Illinois |
| 24 | Zona Anderson | 56 | Head | — | Illinois |
| 25 | John Prince | 33 | Head | Farmer | Illinois |
| 26 | Ruth Prince | 33 | Wife | — | Illinois |
| 27 | Robert Prince | 13 | Son | — | Illinois |
| 28 | John C. Prince | 11 | Son | — | Illinois |
| 29 | William L. Prince | 4 | Son | — | Illinois |
| 30 | Ben Coley | 51 | Head | Farmer | Illinois |
| 31 | Margaret Coley | 49 | Wife | — | Illinois |
| 32 | Neola Coley | 17 | Daughter | — | Illinois |
| 33 | Neal Coley | 17 | Son | — | Illinois |
| 34 | William Giffin | 26 | Head | Farmer | Illinois |
| 35 | Evelyn Giffin | 25 | Wife | — | Illinois |
| 36 | Horace Adams | 59 | Hired Hand | Farmer Laborer | Illinois |
| 37 | Walter Mckee | 38 | Head | Farm Laborer | Illinois |
| 38 | Eva Mckee | 39 | Wife | — | Illinois |
| 39 | George Thissell | 52 | Head | Farmer | Illinois |
| 40 | Elta Thissell | 47 | Wife | — | Illinois |
Pedigree Summary
John
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)