Mary Knapp — 1930 US Census Record

Linked across censuses

1930 United States Federal Census · Monroe, New York

Our Model Tree links this Mary Knapp across the 1920 and 1930 US Censuses in Monroe, New York (XGBoost, ~Confirmed) — first a spouse (b.~1869), then head of a 5-person household.

Age 61 b. ~1869 Female Spouse Born: New York Married

1930 Census Record Details

Census Year	1930
Location	Monroe, New York
Surname	Knapp
Given Name	Mary E.
Relationship to Head	Wife
Sex	F
Color / Race	White
Age	61
Marital Status	Married
Birthplace	New York
Age at First Marriage	24
Father's Birthplace	Germany
Mother's Birthplace	Germany
Additional Details
Occupation	none
Can Read/Write	Yes
Birth State	New York
Birth Country	United States
Birthplace (normalized)	new york
Township / Ward	Rochester City
Est. Birth Year	~1869

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.

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

Name	Relation to head	Relative to Mary	Age	Birth yr
Walter Knapp	Son	—	18	~1912
Adam Knapp	Head	—	61	~1869
Mary Knapp	Spouse	—	61	~1869
Howard Knapp	Son	—	29	~1901
Florence Knapp	Daughter	—	31	~1899

Census Appearances

1920

Monroe, New …

Spouse, age 51

Monroe, New York · implied b. ~1869 — 6 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Knapp
Given Name	Mary
Relationship to Head	Wife
Sex	F
Color / Race	White
Age	51
Marital Status	Married
Birthplace	New York
Father's Birthplace	Germany
Mother's Birthplace	Germany
Can Read	Yes
Can Write	Yes
Speaks English	Yes
Birth State	New York
Birth Country	United States
Birthplace (normalized)	new york

1930

Monroe, New …

Spouse, age 61

Monroe, New York · implied b. ~1869 — 5 household members

Surname	Knapp
Given Name	Mary E.
Relationship to Head	Wife
Sex	F
Color / Race	White
Age	61
Marital Status	Married
Birthplace	New York
Age at First Marriage	24
Father's Birthplace	Germany
Mother's Birthplace	Germany
Occupation	none
Can Read/Write	Yes
Birth State	New York
Birth Country	United States
Birthplace (normalized)	new york

Model Tree

Linked across censuses

Our Model Tree links Mary Knapp across 2 US Census years (1920 and 1930) in Monroe, New York, using XGBoost record linkage.

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This person

Anchor record

Mary Knapp

Spouse · 1930 · age 61 · b. ~1869 · New York

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Confirmed / household (~0.90+) Probable / derived (~0.65–0.89) Candidate (<0.65, unverified)

Original Census Page

1930 US Federal Census — Monroe, New York Open full size

Page Contents

50 people indexed on this census page (ia:1930:newyorkcensus00reel1454:0305)

Line	Name	Age	Relation	Occupation	Birthplace
1	Fannie Rosen	42	Wife	None	Poland
2	Belle Rosen	17	Daughter	Stenographer	Poland
3	Minnie Rosen	14	Daughter	None	New York
4	Morris Rosen	10	Son	None	New York
5	Agnes Althoff	66	Head	None	New York
6	Isadore Fromm	45	Son-in-law	Shoemaker	New York
7	Adelaide B. Fromm	45	Daughter	Typist	New York
8	Norman F. Wahl	39	Head	Bookkeeper	New York
9	Elizabeth F. Wahl	31	Wife	None	New York
10	Myra J. Wahl	5	Daughter	None	New York
11	Walter Groose	36	Head	Trucker	Germany
12	Katherine Groose	31	Wife	None	Germany
13	Wolfgang Groose	6	Son	None	Germany
14	Wendel Engel	56	Head	Machinist	Germany
15	Anna Engel	40	Wife	Box Maker	New York
16	Carl E. Engel	17	Son	Apprentice	New York
17	Margaret Hlinker	66	Mother-in-law	None	Germany
18	Joseph F. Hlinker	34	Brother-in-law	Cook	New York
19	Frank Zimmerman	58	Head	Centerer	Minnesota
20	Elizabeth Zimmerman	61	Wife	None	New York
21	Joseph Zimmerman	32	Son	Clerk	New York
22	Adam J. Knapp	61	Head	Paperhanger	New York
23	Mary E. Knapp THIS PERSON	61	Wife	None	New York
24	Florence A. Knapp	31	Daughter	Stenographer	New York
25	Howard B. Knapp	29	Son	Printer And Layout	New York
26	Walter J. Knapp	18	Son	Trucker	New York
27	Lena Cross	59	Head	None	Russia
28	Jennie Cross	27	Daughter	Bookkeeper	New York
29	Eva Cross	25	Daughter	Typist	New York
30	Sol Cross	19	Son	None	New York
31	Lena Balzman	45	Head	None	Russia
32	Samuel Balzman	21	Son	Sheet Metal Worker	New York
33	Frieda Balzman	19	Daughter	Stenographer	New York
34	Hyman Balzman	17	Son	Drill Press Worker	New York
35	Harry Balzman	13	Son	None	New York
36	Gertrude Balzman	7	Daughter	None	New York
37	Harry J. Felix	42	Head	Proprietor	New York
38	Anna J. Felix	39	Wife	None	New York
39	Mildred J. Felix	8	Daughter	None	New York
40	Felix	4	Daughter	None	New York
41	Herbert Fritz	48	Head	Punch Press Operator	England
42	Margaret Fritz	59	Wife	None	England
43	Vincent Fritz	25	Son	Electrician	New York
44	Doralie Fritz	20	Daughter	Clerk	New York
45	Ralph Fritz	19	Son	Assembler	New York
46	James Nolan	26	Head	Accountant	New York
47	Hilda Nolan	20	Wife	None	England
48	Frank Dundsey	43	Father-in-law	Machine Maintainer	England
49	Frank Welch	44	Head	Foreman	New York
50	Anna Welch	44	Wife	None	Germany

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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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