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John Knapp — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Portage, Ohio
Our Model Tree links this John Knapp across the 1920 and 1930 US Censuses in Portage, Ohio (XGBoost, ~Confirmed) — first a son (b.~1912), then head of a 6-person household.
Age 18
b. ~1912
Male
Son
Born: Ohio
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Portage, Ohio |
| Surname | Knapp |
| Given Name | John P. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Ohio |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Ohio |
| Additional Details | |
| Occupation | Farmer |
| Industry | Farming |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
| Occupation | Farmer |
| Township / Ward | Suffield Township |
| Est. Birth Year | ~1912 |
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.
6 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Leona Knapp | Daughter | — | 23 | ~1907 |
| Clara Knapp | Spouse | — | 48 | ~1882 |
| Bertha Knapp | Daughter | — | 21 | ~1909 |
| John Knapp | Son | — | 18 | ~1912 |
| August Knapp | Head | — | 52 | ~1878 |
| Paul Knapp | Son | — | 15 | ~1915 |
Census Appearances
1920
Portage, Ohio
Son, age 8
Portage, Ohio · implied b. ~1912 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Knapp |
| Given Name | John P. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 8 |
| Marital Status | Single |
| Birthplace | Ohio |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Ohio |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
1930
Portage, Ohio
Son, age 18
Portage, Ohio · implied b. ~1912 — 6 household members
| Surname | Knapp |
| Given Name | John P. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Ohio |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Ohio |
| Occupation | Farmer |
| Industry | Farming |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
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 2 US Census years (1920 and 1930) in Portage, Ohio, using XGBoost record linkage.
Show:
This person
Anchor record
John Knapp
Son · 1930 · age 18 · b. ~1912 · Ohio
★ You are viewing this record
Sibling
Paul Knapp
Sibling · 1930 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Leona Knapp
Sibling · 1930 · age 23
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Bertha Knapp
Sibling · 1930 · age 21
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
1930 US Federal Census — Portage, Ohio
Open full size
1930 US Federal Census — Portage, Ohio
Page Contents
50 people indexed on this census page (ia:1930:ohiocensus00reel1862:0492)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | George G. Hull | 42 | Son-in-law | Superintendent | Kansas |
| 52 | Mabel B. Hull | 37 | Daughter | — | Ohio |
| 53 | Robert D. Swigert | 15 | Grandson | — | West Virginia |
| 54 | Lewis B. Thurston | 32 | Head | Trim Press | Illinois |
| 55 | Mary G. Thurston | 31 | Wife | — | West Virginia |
| 56 | Ruth C. Thurston | 5 | Daughter | — | Ohio |
| 57 | Alfred C. Thurston | 3 | Son | — | Ohio |
| 58 | Axel B. Ek | 35 | Head | Reclaim Cutter | Sweden |
| 59 | Hilda S. Ek | 30 | Wife | — | Sweden |
| 60 | Herbert S. Ek | 11 | Son | — | New York |
| 61 | Edith M. Ek | 9 | Daughter | — | Ohio |
| 62 | Vera A. Ek | 7 | Daughter | — | Ohio |
| 63 | Lillian F. Ek | 5 | Daughter | — | Ohio |
| 64 | Agnes E. Ek | 2 | Daughter | — | Ohio |
| 65 | Andrew May | 75 | Head | — | Ohio |
| 66 | Baker, Abbie May | 65 | Sister | — | Ohio |
| 67 | Clarence E. Englehart | 40 | Nephew | Farmer | Ohio |
| 68 | Esther C. Englehart | 39 | Niece | — | Ohio |
| 69 | Andrew B. Englehart | 9 | Grand Nephew | — | Ohio |
| 70 | John Kemmery | 58 | Head | Farmer | Ohio |
| 71 | Mary Kemmery | 51 | Wife | — | Ohio |
| 72 | Laurence Pierce | 18 | Servant | Laborer | Ohio |
| 73 | Henry S. Elmerick | 39 | Head | Manager | Ohio |
| 74 | Dora Elmerick | 38 | Wife | — | Ohio |
| 75 | Lucille M. Elmerick | 14 | Daughter | — | Ohio |
| 76 | Beatrice A. Elmerick | 12 | Daughter | — | Ohio |
| 77 | Robert G. Elmerick | 10 | Son | — | Ohio |
| 78 | Sylvan G. Elmerick | 7 | Son | — | Ohio |
| 79 | John H. Elmerick | 4 | Son | — | Ohio |
| 80 | Francis H. Elmerick | 2 | Son | — | Ohio |
| 81 | Dolores A. Elmerick | 1 | Daughter | — | Ohio |
| 82 | Jerome L. Kehner | 22 | Servant | Laborer | Ohio |
| 83 | Louis Schuck | 63 | Head | Laborer | Ohio |
| 84 | Carrie M. Schuck | 54 | Wife | — | Ohio |
| 85 | Louise M. Schuck | 15 | Daughter | — | Ohio |
| 86 | Ruth L. Schuck | 11 | Daughter | — | Ohio |
| 87 | John G. Schuck | 8 | Son | — | Ohio |
| 88 | John Chatelain | 47 | Head | Farmer | Ohio |
| 89 | Verdie S. Chatelain | 45 | Wife | — | Ohio |
| 90 | Lloyd N. Driesbach | 28 | Son-in-law | Farmer | Ohio |
| 91 | Edna M. Driesbach | 21 | Daughter | — | Ohio |
| 92 | Ruth E. Driesbach | 6 | Granddaughter | — | Ohio |
| 93 | Stanley L. Driesbach | 5 | Grandson | — | Ohio |
| 94 | Jonas Averill | 64 | Servant | Laborer | Ohio |
| 95 | August J. Knapp | 52 | Head | Farmer | Ohio |
| 96 | Clara R. Knapp | 48 | Wife | — | Ohio |
| 97 | Leona P. Knapp | 23 | Daughter | Office Filing | Ohio |
| 98 | Bertha E. Knapp | 21 | Daughter | Servant | Ohio |
| 99 | John P. Knapp THIS PERSON | 18 | Son | Farmer | Ohio |
| 100 | Paul C. Knapp | 15 | Son | — | Ohio |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1930 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)