MK
Mary Knapp — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Dauphin, Pennsylvania
Our Model Tree links this Mary Knapp across the 1920 and 1930 US Censuses in Dauphin, Pennsylvania (XGBoost, ~Confirmed) — first a daughter (b.~1894), then head of a 13-person household.
Age 36
b. ~1894
Female
Daughter
Born: Pennsylvania
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Dauphin, Pennsylvania |
| Surname | Knapp |
| Given Name | Mary E |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 36 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Additional Details | |
| Occupation | Wash woman |
| Industry | Private family |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Occupation | Wash Woman |
| Township / Ward | Middle Paxton Twp |
| Est. Birth Year | ~1894 |
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 1930 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Charles Knapp | Other | — | 12 | ~1918 |
| Herman Knapp | Other | — | 4 | ~1926 |
| Margaret Knapp | Other | — | 6 | ~1924 |
| Morris Knapp | Other | — | 4 | ~1926 |
| Lewis Knapp | Son | — | 38 | ~1892 |
| Henry Knapp | Other | — | 15 | ~1915 |
| Mathias Knapp | Head | — | 68 | ~1862 |
| Sallie Knapp | Daughter | — | 32 | ~1898 |
| Dewey Knapp | Son | — | 30 | ~1900 |
| Mabel Knapp | Other | — | 3 | ~1927 |
| Anna Knapp | Other | — | 71 | ~1859 |
| Susan Knapp | Daughter | — | 27 | ~1903 |
| Mary Knapp | Daughter | — | 36 | ~1894 |
Census Appearances
1920
Dauphin, Pennsylvania
Daughter, age 26
Dauphin, Pennsylvania · implied b. ~1894 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Knapp |
| Given Name | Mary E |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 26 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1930
Dauphin, Pennsylvania
Daughter, age 36
Dauphin, Pennsylvania · implied b. ~1894 — 13 household members
| Surname | Knapp |
| Given Name | Mary E |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 36 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Occupation | Wash woman |
| Industry | Private family |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
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 (1920 and 1930) in Dauphin, Pennsylvania, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Knapp
Daughter · 1930 · age 36 · b. ~1894 · Pennsylvania
★ You are viewing this record
Sibling
Dewey Knapp
Sibling · 1930 · age 30
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Susan Knapp
Sibling · 1930 · age 27
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lewis Knapp
Sibling · 1930 · age 38
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Sallie Knapp
Sibling · 1930 · age 32
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 — Dauphin, Pennsylvania
Open full size
1930 US Federal Census — Dauphin, Pennsylvania
Page Contents
50 people indexed on this census page (ia:1930:fifteenthcensus00reel2027:1001)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Edward A | 8 | Son | None | Pennsylvania |
| 52 | June B | 5 | Daughter | None | Pennsylvania |
| 53 | Mathias B Knapp | 68 | Head | Laborer | Pennsylvania |
| 54 | Anna C Knapp | 71 | Wife-H | None | Pennsylvania |
| 55 | Lewis M Knapp | 38 | Son | Laborer | Pennsylvania |
| 56 | Mary E Knapp THIS PERSON | 36 | Daughter | Wash Woman | Pennsylvania |
| 57 | Sallie R Knapp | 32 | Daughter | None | Pennsylvania |
| 58 | Dewey H Knapp | 30 | Son | Laborer | Pennsylvania |
| 59 | Susan E Knapp | 27 | Daughter | Cook | Pennsylvania |
| 60 | Henry J Knapp | 15 | G. Son | None | Pennsylvania |
| 61 | Charles Knapp | 12 | G. Son | None | Pennsylvania |
| 62 | Margaret A Knapp | 6 | G. Daughter | None | Pennsylvania |
| 63 | Herman E Knapp | 4 | G. Son | None | Pennsylvania |
| 64 | Morris E Knapp | 4 | G. Son | None | Pennsylvania |
| 65 | Mabel C Knapp | 3 | G. Daughter | None | Pennsylvania |
| 66 | Sylvester N Fuhrman | 35 | Head | Laborer | Pennsylvania |
| 67 | Ida A Fuhrman | 29 | Wife-H | None | Pennsylvania |
| 68 | Martin M Fuhrman | 12 | Son | None | Pennsylvania |
| 69 | Frank S Fuhrman | 9 | Son | None | Pennsylvania |
| 70 | Martha G Fuhrman | 6 | Daughter | None | Pennsylvania |
| 71 | William H Fuhrman | 4 | Son | None | Pennsylvania |
| 72 | Theodore R Fuhrman | 27 | Head | Laborer | Pennsylvania |
| 73 | Helen R Fuhrman | 19 | Wife-H | None | Pennsylvania |
| 74 | Betty G. C. Fuhrman | 2 | Daughter | None | Pennsylvania |
| 75 | Theodore R. Jr. Fuhrman | 0 | Son | None | Pennsylvania |
| 76 | John E Herman | 37 | Head | Foreman | Pennsylvania |
| 77 | Margaret S Herman | 37 | Wife | None | Pennsylvania |
| 78 | Margaret S. Jr. Herman | 13 | Daughter | None | Pennsylvania |
| 79 | John E. 3Rd Herman | 12 | Son | None | Pennsylvania |
| 80 | James D Herman | 2 | Son | None | Pennsylvania |
| 81 | Esther G Minsker | 17 | Servant | Cook | Pennsylvania |
| 82 | Catherine Roland | 17 | Servant | Nurse | Pennsylvania |
| 83 | Albert H Stackpole | 32 | Head | Asst Editor | Pennsylvania |
| 84 | Mary C Stackpole | 33 | Wife-H | None | Pennsylvania |
| 85 | Catharine Eby | 65 | Servant | Gen House Keeper | Pennsylvania |
| 86 | Alfred F Snyder | 20 | Servant | Hostler | Pennsylvania |
| 87 | Mary E Fuhrman | 57 | Head-H | Housekeeper | Pennsylvania |
| 88 | Sol G Knapp | 48 | Servant | Farmer | Pennsylvania |
| 89 | John A Fissel | 18 | Nephew | None | Pennsylvania |
| 90 | Ebon Fissel | 15 | Niece | None | Pennsylvania |
| 91 | Mary Fissel | 13 | Niece | None | Pennsylvania |
| 92 | William P Heimbaugh | 26 | Head | Roller | Pennsylvania |
| 93 | Mary E Heimbaugh | 24 | Wife-H | None | Pennsylvania |
| 94 | Mary E Heimbaugh | 5 | Daughter | None | Pennsylvania |
| 95 | Betty J Heimbaugh | 2 | Daughter | None | Pennsylvania |
| 96 | John Minsker | 62 | Head | Farmer | Pennsylvania |
| 97 | Elmira Minsker | 54 | Wife-H | None | Pennsylvania |
| 98 | Ruth N Minsker | 32 | Daughter | Housekeeper | Pennsylvania |
| 99 | Charles W Roland | 20 | Servant | Forestry | Pennsylvania |
| 100 | George M Stauffer | 60 | Head | Teamster | Pennsylvania |
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)