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William Knapp — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cayuga-County, New York
Our Model Tree links this William Knapp across the 1930 and 1940 US Censuses in Cayuga-County, New York (XGBoost, ~Confirmed) — first a son (b.~1925), then head of a 13-person household.
Age 15
b. ~1925
Male
Son
Born: New York
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cayuga-County, New York |
| Surname | Knapp |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | New York |
| 1935 Residence (City) | Ledyard Town |
| 1935 Residence (County) | Cayuga |
| Additional Details | |
| Occupation | New worker |
| Class of Worker | 0 |
| Highest Grade | H 1 |
| 1935 Residence | Same place |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
| Occupation | New Worker |
| Township / Ward | Ledyard Town |
| Est. Birth Year | ~1925 |
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.
13 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| George Knapp | Son | — | 10 | ~1930 |
| Francis Knapp | Son | — | 2 | ~1938 |
| William Knapp | Son | — | 15 | ~1925 |
| Frances Knapp | Spouse | — | 35 | ~1905 |
| Nancy Knapp | Daughter | — | 8 | ~1932 |
| Mae Knapp | Daughter | — | 17 | ~1923 |
| Emma Knapp | Daughter | — | ~1940 | |
| David Knapp | Son | — | 13 | ~1927 |
| Frederick Knapp | Son | — | 1 | ~1939 |
| Aletha Knapp | Daughter | — | 12 | ~1928 |
| James Knapp | Son | — | 4 | ~1936 |
| Mildred Knapp | Daughter | — | 7 | ~1933 |
| William Knapp | Head | — | 42 | ~1898 |
Census Appearances
1930
Cayuga, New …
Other, age 5
Cayuga, New York · implied b. ~1925 — 50 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Knapp |
| Given Name | Willard D |
| Sex | M |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | New York |
| Father's Birthplace | New York |
| Mother's Birthplace | New York |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
1940
Cayuga-County, New …
Son, age 15
Cayuga-County, New York · implied b. ~1925 — 13 household members
| Surname | Knapp |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | New York |
| 1935 Residence (City) | Ledyard Town |
| 1935 Residence (County) | Cayuga |
| Occupation | New worker |
| Class of Worker | 0 |
| Highest Grade | H 1 |
| 1935 Residence | Same place |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
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 15 · b. ~1925 · New York
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Sibling
Francis Knapp
Sibling · 1940 · age 2
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mae Knapp
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
George Knapp
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Aletha Knapp
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mildred Knapp
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Frederick Knapp
Sibling · 1940 · age 1
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Emma Knapp
Sibling · 1940 · age
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
David Knapp
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Knapp
Sibling · 1940 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Nancy Knapp
Sibling · 1940 · age 8
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 — Cayuga-County, New York
Open full size
1940 US Federal Census — Cayuga-County, New York
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02508-00324)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Luella B. Shultz | 29 | Wife | Maid | Pennsylvania |
| 2 | Gloria Jean Shultz | 8 | Daughter | — | New York |
| 3 | Carl Weeks | 34 | Head | Hired Man | Pennsylvania |
| 4 | Lena R. Weeks | 23 | Wife | Laundress | Pennsylvania |
| 5 | Shirley Mae Weeks | 6 | Daughter | — | Pennsylvania |
| 6 | Robert P. Hills | 58 | Head | Operator | New York |
| 7 | Esther Crusaden | 73 | Servant | Housekeeper | England |
| 8 | Paul Hills | 42 | Head | — | New York |
| 9 | Jane Hills | 40 | Wife | — | New York |
| 10 | James Hills | 17 | Son | — | New York |
| 11 | William Hills | 14 | Son | — | New York |
| 12 | Robert B. Lawson | 28 | Head | Operator | New York |
| 13 | Eva Lawson | 33 | Wife | — | New York |
| 14 | James Scott | 22 | Head | Laborer | New York |
| 15 | Ida Scott | 21 | Wife | — | New York |
| 16 | Harvey P. Mcdowell | 68 | Head | — | Georgia |
| 17 | Lillian R. Mcdowell | 53 | Wife | — | Illinois |
| 18 | Howard Marden | 42 | Head | Operator | New York |
| 19 | Charlotte Marden | 46 | Wife | — | Missouri |
| 20 | Marden | 18 | Daughter | — | New York |
| 21 | Charles Marden | 48 | Brother | — | New York |
| 22 | John Fuller | 78 | Boarder | — | New York |
| 23 | William Knapp | 42 | Head | Bagger | New York |
| 24 | Frances Knapp | 35 | Wife | — | New York |
| 25 | Mae Knapp | 17 | Daughter | New Worker | New York |
| 26 | William Knapp THIS PERSON | 15 | Son | New Worker | New York |
| 27 | David Knapp | 13 | Son | New Worker | New York |
| 28 | Aletha Knapp | 12 | Daughter | — | New York |
| 29 | George Knapp | 10 | Son | — | New York |
| 30 | Nancy Knapp | 8 | Daughter | — | New York |
| 31 | Mildred Knapp | 7 | Daughter | — | New York |
| 32 | James Knapp | 4 | Son | — | New York |
| 33 | Francis Knapp | 2 | Son | — | New York |
| 34 | Frederick Knapp | 1 | Son | — | New York |
| 35 | Emma Knapp | 0 | Daughter | — | New York |
| 36 | John D. Redmond | 73 | Head | Operator | New York |
| 37 | Margaret Redmond | 74 | Wife | — | New York |
| 38 | Ray Redmond | 48 | Son | — | New York |
| 39 | James O'Connor | 50 | Hired man | Laborer | New York |
| 40 | Isaac P. Price | 60 | Head | Operator | New York |
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)