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William Knapp — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Price-County, Wisconsin
Our Model Tree links this William Knapp across the 1930 and 1940 US Censuses in Price-County, Wisconsin (XGBoost, ~Confirmed) — first a son (b.~1927), then head of a 8-person household.
Age 13
b. ~1927
Male
Son
Born: Wisconsin
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Price-County, Wisconsin |
| Surname | Knapp |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Wisconsin |
| 1935 Residence (City) | Elk township |
| 1935 Residence (County) | Price |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | No 7 |
| 1935 Residence | Same house |
| Birth State | Wisconsin |
| Birth Country | United States |
| Birthplace (normalized) | wisconsin |
| Township / Ward | Elk Township |
| Est. Birth Year | ~1927 |
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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| Martin Knapp | Son | — | 16 | ~1924 |
| Emma Fox | Other | — | 74 | ~1866 |
| Paul Knapp | Head | — | 46 | ~1894 |
| Nina Knapp | Spouse | — | 40 | ~1900 |
| William Knapp | Son | — | 13 | ~1927 |
| Elva Knapp | Daughter | — | 9 | ~1931 |
| Emma Knapp | Daughter | — | 14 | ~1926 |
| Leo Knapp | Son | — | 17 | ~1923 |
Census Appearances
1930
Price, Wisconsin
Son, age 3
Price, Wisconsin · implied b. ~1927 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Knapp |
| Given Name | William |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | Wisconsin |
| Father's Birthplace | Wisconsin |
| Mother's Birthplace | Wisconsin |
| Occupation | none |
| Birth State | Wisconsin |
| Birth Country | United States |
| Birthplace (normalized) | wisconsin |
1940
Price-County, Wisconsin
Son, age 13
Price-County, Wisconsin · implied b. ~1927 — 8 household members
| Surname | Knapp |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Wisconsin |
| 1935 Residence (City) | Elk township |
| 1935 Residence (County) | Price |
| Income (1939) | 0 |
| Highest Grade | No 7 |
| 1935 Residence | Same house |
| Birth State | Wisconsin |
| Birth Country | United States |
| Birthplace (normalized) | wisconsin |
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 William Knapp across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
William Knapp
Son · 1940 · age 13 · b. ~1927 · Wisconsin
★ You are viewing this record
Sibling
Leo Knapp
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Martin Knapp
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Elva Knapp
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Emma Knapp
Sibling · 1940 · age 14
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 — Price-County, Wisconsin
Open full size
1940 US Federal Census — Price-County, Wisconsin
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-04514-00050)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Sam Russo | 43 | Head | Farmer | Italy |
| 2 | Minnie Russo | 44 | Wife | — | Wisconsin |
| 3 | Cecil S. Russo | 15 | Son | — | Wisconsin |
| 4 | Raeford Russo | 15 | Son | — | Wisconsin |
| 5 | Rosalie M. Russo | 15 | Daughter | — | Wisconsin |
| 6 | Elra Purdun | 54 | Head | Farmer | Michigan |
| 7 | Kathryn Purdun | 48 | Wife | — | Indiana |
| 8 | Robert Purdun | 17 | Son | — | Wisconsin |
| 9 | James Hrad | 50 | Head | Farmer | Bohemia |
| 10 | Frances Hrad | 44 | Wife | — | Bohemia |
| 11 | James Hrad | 12 | Son | — | Nebraska |
| 12 | Georgette Hrad | 11 | Daughter | — | Missouri |
| 13 | Joseph Horak | 48 | Head | Farmer | Yugo Slavia |
| 14 | Anna Horak | 40 | Wife | — | Yugo Slavia |
| 15 | Joseph Horak | 18 | Son | — | Wisconsin |
| 16 | Mary Horak | 16 | Daughter | — | Wisconsin |
| 17 | Charles Horak | 13 | Son | — | Wisconsin |
| 18 | John Horak | 10 | Son | — | Wisconsin |
| 19 | Anna Horak | 6 | Daughter | — | Wisconsin |
| 20 | Paul Knapp | 46 | Head | Farmer | Wisconsin |
| 21 | Nina Knapp | 40 | Wife | — | Indiana |
| 22 | Leo Knapp | 17 | Son | Laborer | Wisconsin |
| 23 | Martin Knapp | 16 | Son | — | Wisconsin |
| 24 | Emma Lee Knapp | 14 | Daughter | — | Wisconsin |
| 25 | William Knapp THIS PERSON | 13 | Son | — | Wisconsin |
| 26 | Elva Knapp | 9 | Daughter | — | Wisconsin |
| 27 | Emma Fox | 74 | Mother-in-law | — | Indiana |
| 28 | Norman Cork | 33 | Head | Common Laborer | Wisconsin |
| 29 | Mary Cork | 29 | Wife | — | Wisconsin |
| 30 | Martha D. Cork | 8 | Daughter | — | Wisconsin |
| 31 | Johanna Cork | 2 | Daughter | — | Wisconsin |
| 32 | Stephine Cork | 0 | Daughter | — | Wisconsin |
| 33 | Reuben Cork | 42 | Head | Farmer | Wisconsin |
| 34 | Margaret Cork | 38 | Wife | — | Wisconsin |
| 35 | David M. Cork | 17 | Son | — | Wisconsin |
| 36 | Hazel S. Cork | 11 | Daughter | — | Wisconsin |
| 37 | Lawrence Cork | 36 | Head | — | Wisconsin |
| 38 | John Koehler | 44 | Head | Farmer | Wisconsin |
| 39 | Jennie Koehler | 42 | Wife | — | Wisconsin |
| 40 | Velva Koehler | 13 | Daughter | — | Wisconsin |
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)