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John Knapp — 1930 US Census Record

Linked across censuses

1930 United States Federal Census · Queens, New York

Our Model Tree links this John Knapp across the 1930 and 1940 US Censuses in Queens, New York (XGBoost, ~Confirmed) — first a son (b.~1928), then head of a 14-person household.

Age 2 b. ~1928 Male Son Born: New York Single

1930 Census Record Details

Census Year1930
LocationQueens, New York
SurnameKnapp
Given NameJohn
Relationship to HeadSon
SexM
Color / RaceWhite
Age2
Marital StatusSingle
BirthplaceNew York
Father's BirthplaceGermany
Mother's BirthplaceGermany
Additional Details
Occupationnone
Birth StateNew York
Birth CountryUnited States
Birthplace (normalized)new york
Township / WardNew York City
Est. Birth Year~1928

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.

14 people recorded at the same address in the 1930 census.

Name Relation to head Relative to John Age Birth yr
Ruth Knapp Daughter — 6 ~1924
Frederick Knapp Son — 18 ~1912
Christian Knapp Head — 48 ~1882
Helen Knapp Daughter — 22 ~1908
John Knapp Son — 2 ~1928
Dorothy Knapp Daughter — 12 ~1918
Henry Knapp Son — 14 ~1916
Christian Knapp Son — 20 ~1910
Henry Knapp Son — 8 ~1922
Josephine Knapp Daughter — 16 ~1914
Martine Knapp Daughter — ~1930
Anna Knapp Spouse — 48 ~1882
Robert Knapp Son — 10 ~1920
Alice Knapp Daughter — 4 ~1926

Census Appearances

1930
Queens, New …
Son, age 2
Queens, New York · implied b. ~1928 — 14 household members
Surname Knapp
Given Name John
Relationship to Head Son
Sex M
Color / Race White
Age 2
Marital Status Single
Birthplace New York
Father's Birthplace Germany
Mother's Birthplace Germany
Occupation none
Birth State New York
Birth Country United States
Birthplace (normalized) new york
1940
Queens-County, New …
Son, age 13
Queens-County, New York · implied b. ~1927 — 4 household members
●  Primary link · ~Confirmed · 2 sources
XGBoost Household
Surname Knipp
Given Name John
Relationship to Head Son
Sex M
Color / Race M
Age 13
Marital Status Single
Birthplace New York
1935 Residence (City) Queens
1935 Residence (County) Queens
Highest Grade No 7
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.
Linked across censuses
Our Model Tree links John Knapp across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Knapp
Son · 1930 · age 2 · b. ~1928 · New York
★ You are viewing this record
Sibling
Henry Knapp
Sibling · 1930 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Knapp
Sibling · 1930 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Christian Knapp
Sibling · 1930 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Frederick Knapp
Sibling · 1930 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ruth Knapp
Sibling · 1930 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Alice Knapp
Sibling · 1930 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Henry Knapp
Sibling · 1930 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Dorothy Knapp
Sibling · 1930 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Martine Knapp
Sibling · 1930 · age
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Helen Knapp
Sibling · 1930 · age 22
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Josephine Knapp
Sibling · 1930 · age 16
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 — Queens, New York Open full size

Page Contents

50 people indexed on this census page (ia:1930:newyorkcensus00reel1609:0413)

Line Name Age Relation Occupation Birthplace
1 Carl Gutenberg 52 Head Porter Germany
2 Marie Gutenberg 52 Wife None Germany
3 Reginald Gutenberg 26 Son Mechanic New York
4 Gladys Gutenberg 24 Daughter None New York
5 Ernest Gutenberg 22 Son Mechanic New York
6 George F Shaw 27 Head Instructor New York
7 Hilda Shaw 24 Wife None New York
8 George Shaw 1 Son None New York
9 Ray Shaw 0 Son None New York
10 Henry Spengler 56 Head Watchman England
11 Carrie Spengler 56 Wife None Germany
12 James Manning 56 Head None New York
13 Bertha Manning 56 Wife None Germany
14 James Manning 24 Son None New York
15 Marie Manning 22 Daughter None New York
16 Elizabeth Manning 20 Daughter None New York
17 William Manning 18 Son None New York
18 John W Manning 16 Son None New York
19 Sophia Manning 14 Daughter None New York
20 Helen Manning 12 Daughter None New York
21 William Manning 10 Son None New York
22 Catherine Manning 8 Daughter None New York
23 Mabel Manning 6 Daughter None New York
24 Christian Knapp 48 Head None Germany
25 Anna Knapp 48 Wife None Germany
26 Helen Knapp 22 Daughter None New York
27 Christian Knapp 20 Son None New York
28 Frederick Knapp 18 Son None New York
29 Josephine G Knapp 16 Daughter None New York
30 Henry Knapp 14 Son None New York
31 Dorothy Knapp 12 Daughter None New York
32 Robert Knapp 10 Son Salesman New York
33 Henry Knapp 8 Son Painter New York
34 Ruth Knapp 6 Daughter None New York
35 Alice Knapp 4 Daughter None New York
36 John Knapp THIS PERSON 2 Son None New York
37 Martine Knapp 0 Daughter None New York
38 Fred Becht 56 Head None Germany
39 Henry Becht 56 Son None Germany
40 Alice Becht 56 Wife None Germany
41 Mortimer Becht 56 Son Clerk New York
42 Frank Cesa 56 Head Clerk Italy
43 Marie Cesa 56 Wife None Germany
44 Bernadette Cesa 56 Daughter None New York
45 Frank Cesa 56 Son None New York
46 William Cesa 20 Son Clerk New York
47 Catherine Cesa 21 Daughter None New York
48 Josephine Cesa 21 Head None New York
49 Matilda Cesa 21 Wife None New York
50 Frank Cesa 21 Son None New York

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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)

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