MK
Mary Knapp — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Summit-County, Ohio
Our Model Tree links this Mary Knapp across the 1930 and 1940 US Censuses in Summit-County, Ohio (XGBoost, ~Confirmed) — first a spouse (b.~1888), then head of a 6-person household.
Age 52
b. ~1888
Female
Spouse
Born: Ohio
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Summit-County, Ohio |
| Surname | Knapp |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 52 |
| Marital Status | Married |
| Birthplace | Ohio |
| 1935 Residence (City) | Akron City |
| 1935 Residence (County) | Summit |
| Additional Details | |
| Highest Grade | 8 |
| 1935 Residence | Same place |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
| Township / Ward | Akron City |
| Est. Birth Year | ~1888 |
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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Paul Knapp | Son | — | 32 | ~1908 |
| Rita Knapp | Daughter | — | 19 | ~1921 |
| Albert Knapp | Son | — | 16 | ~1924 |
| Edward Knapp | Head | — | 53 | ~1887 |
| Mary Knapp | Spouse | — | 52 | ~1888 |
| Loretta Knapp | Daughter | — | 23 | ~1917 |
Census Appearances
1930
Summit, Ohio
Spouse, age 42
Summit, Ohio · implied b. ~1888 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Knapp |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 42 |
| Marital Status | Married |
| Birthplace | Ohio |
| Age at First Marriage | 18 |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Ohio |
| Occupation | Machine Operator |
| Industry | Rubber Factory |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
1940
Summit-County, Ohio
Spouse, age 52
Summit-County, Ohio · implied b. ~1888 — 6 household members
| Surname | Knapp |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 52 |
| Marital Status | Married |
| Birthplace | Ohio |
| 1935 Residence (City) | Akron City |
| 1935 Residence (County) | Summit |
| Highest Grade | 8 |
| 1935 Residence | Same place |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
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 Mary Knapp across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Knapp
Spouse · 1940 · age 52 · b. ~1888 · Ohio
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Summit-County, Ohio
Open full size
1940 US Federal Census — Summit-County, Ohio
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03177-00094)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Daniel E Kent | 15 | Son | — | Ohio |
| 2 | William Kent | 11 | Son | — | Michigan |
| 3 | Joseph Robert Kent | 7 | Son | — | Michigan |
| 4 | Albert Henning | 43 | Head | New Worker Warehouse Helper | Pennsylvania |
| 5 | Helen Henning | 41 | Wife | — | Pennsylvania |
| 6 | Gilbert Henning | 17 | Son | — | Ohio |
| 7 | Carl H Case | 43 | Head | Labor | Ohio |
| 8 | Nora Case | 33 | Wife | — | Michigan |
| 9 | Jeannie Case | 72 | Head | — | Ohio |
| 10 | Anna Markle | 52 | Head | — | England |
| 11 | Betty Markle | 21 | Daughter | Typ. | Ohio |
| 12 | Josephine Luegger | 67 | Head | — | Ohio |
| 13 | Charles Leininger | 77 | Head | — | Ohio |
| 14 | Louise Leininger | 71 | Wife | — | Ohio |
| 15 | Harold Marque | 41 | Head | Mill Hand | Virginia |
| 16 | Erna Marque | 38 | Wife | — | Germany |
| 17 | Harold Marque | 5 | Son | — | Ohio |
| 18 | Richard Marque | 3 | Son | — | Ohio |
| 19 | William Shaffer | 55 | Lodger | — | Ohio |
| 20 | Carl Leininger | 44 | Head | Sheet Metal | Ohio |
| 21 | Fridda Leininger | 47 | Wife | — | Pennsylvania |
| 22 | Esther Leininger | 17 | Daughter | — | Ohio |
| 23 | Betty Leininger | 15 | Daughter | — | Ohio |
| 24 | Mary Leininger | 14 | Daughter | — | Ohio |
| 25 | Patricia Leininger | 12 | Daughter | — | Ohio |
| 26 | Edward Knapp | 53 | Head | — | Ohio |
| 27 | Mary Knapp THIS PERSON | 52 | Wife | — | Ohio |
| 28 | Paul Knapp | 32 | Son | Baker Helper | Ohio |
| 29 | Loretta Knapp | 23 | Daughter | Operator Machine | Ohio |
| 30 | Rita Knapp | 19 | Daughter | Filing | Ohio |
| 31 | Albert Knapp | 16 | Son | — | Ohio |
| 32 | John Giredeck | 26 | Head | Tire Builder | Ohio |
| 33 | Anna Giredeck | 25 | Wife | — | Indiana |
| 34 | Jesse Rettenour | 50 | Head | Mix Paint | Pennsylvania |
| 35 | Pearl Rettenour | 47 | Wife | — | Pennsylvania |
| 36 | Charles Rettenour | 15 | Son | — | Pennsylvania |
| 37 | George Rettenour | 11 | Son | — | Pennsylvania |
| 38 | Bettie Rettenour | 9 | Daughter | — | Ohio |
| 39 | Paul Workman | 49 | Head | Tire Builder | West Virginia |
| 40 | Viola Workman | 46 | Wife | — | Ohio |
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)