YourRoots by Genomelink
Sign up free
WK

William Knapp — 1940 US Census Record

Linked across censuses

1940 United States Federal Census · Vanderburgh-County, Indiana

Our Model Tree links this William Knapp across the 1930 and 1940 US Censuses in Vanderburgh-County, Indiana (XGBoost, ~Confirmed) — first a son (b.~1926), then head of a 7-person household.

Age 14 b. ~1926 Male Son Born: Indiana Single

1940 Census Record Details

Census Year1940
LocationVanderburgh-County, Indiana
SurnameKnapp
Given NameWilliam T
Relationship to HeadSon
SexM
Color / RaceWhite
Age14
Marital StatusSingle
BirthplaceIndiana
1935 Residence (City)Evansville city
1935 Residence (County)Vanderburgh
Additional Details
Income (1939)0
Highest GradeNo 7
1935 ResidenceSame house
Birth StateIndiana
Birth CountryUnited States
Birthplace (normalized)indiana
Township / WardEvansville City
Est. Birth Year~1926

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.

7 people recorded at the same address in the 1940 census.

Name Relation to head Relative to William Age Birth yr
William Knapp Head — 40 ~1900
Albert Knapp Son — 9 ~1931
Caroline Knapp Daughter — 4 ~1936
William Knapp Son — 14 ~1926
Mary Knapp Daughter — 1 ~1939
Olivia Knapp Spouse — 41 ~1899
Regina Knapp Daughter — 12 ~1928

Census Appearances

1930
Vanderburgh, Indiana
Son, age 4
Vanderburgh, Indiana · implied b. ~1926 — 5 household members
●  Primary link · ~Confirmed · 2 sources
XGBoost Household
Surname Knapp
Given Name William Jr
Relationship to Head Son
Sex M
Color / Race White
Age 4
Marital Status Single
Birthplace Indiana
Father's Birthplace Indiana
Mother's Birthplace Indiana
Occupation none
Birth State Indiana
Birth Country United States
Birthplace (normalized) indiana
1940
Vanderburgh-County, Indiana
Son, age 14
Vanderburgh-County, Indiana · implied b. ~1926 — 7 household members
Surname Knapp
Given Name William T
Relationship to Head Son
Sex M
Color / Race White
Age 14
Marital Status Single
Birthplace Indiana
1935 Residence (City) Evansville city
1935 Residence (County) Vanderburgh
Income (1939) 0
Highest Grade No 7
1935 Residence Same house
Birth State Indiana
Birth Country United States
Birthplace (normalized) indiana

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.
Linked across censuses
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 14 · b. ~1926 · Indiana
★ You are viewing this record
Sibling
Albert Knapp
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Knapp
Sibling · 1940 · age 1
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Regina Knapp
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Caroline Knapp
Sibling · 1940 · age 4
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 — Vanderburgh-County, Indiana Open full size

Page Contents

40 people indexed on this census page (nara:1940:m-t0627-01114-00286)

Line Name Age Relation Occupation Birthplace
41 George W Young 20 Head Carpenter Indiana
42 Rose E Young 21 Wife — Kentucky
43 Henry F Brown 21 Head Spray Man Indiana
44 Mary A Brown 22 Wife — Indiana
45 Henry A Brown 1 Son — Indiana
46 Virgil W Kinnett 32 Head Laborer Indiana
47 Lenora O Kinnett 29 Wife — Indiana
48 Mary E Kinnett 11 Daughter — Indiana
49 Roberta R Kinnett 8 Daughter — Indiana
50 Leo V Kinnett 6 Son — Indiana
51 Harold J Kinnett 3 Son — Indiana
52 John W Illy 37 Head Bottler Indiana
53 Mabel M Illy 33 Wife Machine Operator Illinois
54 Donald W Illy 2 Son — Indiana
55 Mary Doggett 51 Mother-in-law — Indiana
56 William Knapp 40 Head Metal Finisher Indiana
57 Olivia Knapp 41 Wife — Indiana
58 William T Knapp THIS PERSON 14 Son — Indiana
59 Regina Knapp 12 Daughter — Indiana
60 Albert B Knapp 9 Son — Indiana
61 Caroline S Knapp 4 Daughter — Indiana
62 Mary R Knapp 1 Daughter — Indiana
63 Buford Watson 48 Head Bottler Kentucky
64 Josephine Watson 39 Wife — Indiana
65 Mary C Martini 28 Niece — Kentucky
66 Barbara L Martini 20 Niece Waitress Indiana
67 Herman Yeager 65 Lodger — Germany
68 Anna F Puth 53 Head Dressmaker Indiana
69 Peter Mity 52 Brother-in-law Cabinet Maker Indiana
70 Katherine Mity 52 Sister Dressmaker Indiana
71 William F Hartig 65 Head Maintenance Man Indiana
72 Edgar C Hettenbach 25 Nephew Repair Man Indiana
73 Elizabeth M Hettenbach 27 Niece — Indiana
74 Wilson J Hutchison 37 Head Body & Fender Man Indiana
75 Louise Hutchison 32 Wife Seamstress Kentucky
76 Martha A Hutchison 5 Daughter — Kentucky
77 Sharon S Hutchison 3 Daughter — Indiana
78 Florence E Hutchison 17 Niece Housekeeper Indiana
79 Mary Eaves 19 Lodger Marker Illinois
80 William S Smith 21 Head Truck Driver Kentucky

Search for William Knapp

All William Knapp Census Records Discover Knapp Family Tree

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)

Report inaccurate data
👤 View Profile 🌳 Ancestors 👥 Descendants