JK
John Knapp — 1920 US Census Record
Linked across censuses1920 United States Federal Census · Philadelphia, Pennsylvania
Our Model Tree links this John Knapp across the 1910 and 1920 US Censuses in Philadelphia, Pennsylvania (XGBoost, ~Confirmed) — first a son (b.~1906), then head of a 7-person household.
Age 14
b. ~1906
Male
Son
Born: Pennsylvania
Single
1920 Census Record Details
| Census Year | 1920 |
| Location | Philadelphia, Pennsylvania |
| Surname | Knapp |
| Given Name | John J |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Additional Details | |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Township / Ward | Philadelphia City |
| Est. Birth Year | ~1906 |
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 1920 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| John Knapp | Other | — | 64 | ~1856 |
| Emma Knapp | Spouse | — | 34 | ~1886 |
| John Knapp | Son | — | 14 | ~1906 |
| Purman Knapp | Son | — | 11 | ~1909 |
| William Knapp | Son | — | 2 | ~1918 |
| John Knapp | Head | — | 36 | ~1884 |
| Gertrude Knapp | Daughter | — | 4 | ~1916 |
Census Appearances
1910
Philadelphia, Pennsylvania
Son, age 4
Philadelphia, Pennsylvania · implied b. ~1906 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Knapp |
| Given Name | John F |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Occupation | none |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1920
Philadelphia, Pennsylvania
Son, age 14
Philadelphia, Pennsylvania · implied b. ~1906 — 7 household members
| Surname | Knapp |
| Given Name | John J |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| 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 |
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 John Knapp across 2 US Census years (1910 and 1920) in Philadelphia, Pennsylvania, using XGBoost record linkage.
Show:
This person
Anchor record
John Knapp
Son · 1920 · age 14 · b. ~1906 · Pennsylvania
★ You are viewing this record
Sibling
Purman Knapp
Sibling · 1920 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Gertrude Knapp
Sibling · 1920 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Knapp
Sibling · 1920 · age 2
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
1920 US Federal Census — Philadelphia, Pennsylvania
Open full size
1920 US Federal Census — Philadelphia, Pennsylvania
Page Contents
50 people indexed on this census page (ia:1920:14thcensusofpopu1643unit:0163)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | William Gilmore | 50 | Head | Foreman | Ireland |
| 2 | Martha Gilmore | 48 | Wife | — | Ireland |
| 3 | George Gilmore | 20 | Son | Bookkeeper | Pennsylvania |
| 4 | Joseph Gilmore | 16 | Son | Office Boy | Pennsylvania |
| 5 | Florence Rickards | 52 | Head | — | Pennsylvania |
| 6 | Lydia Grieres | 81 | Mother | — | Pennsylvania |
| 7 | Milton Wolf | 41 | Head | Stenographer | Pennsylvania |
| 8 | Mary Wolf | 42 | Wife | — | Pennsylvania |
| 9 | Gladys Wolf | 20 | Daughter | Bookkeeper | Pennsylvania |
| 10 | John Reifsnyder | 62 | Head | Manufacturer | Pennsylvania |
| 11 | Magdalene Reifsnyder | 57 | Wife | — | Pennsylvania |
| 12 | Ada Reifsnyder | 22 | Daughter | Stenographer | Pennsylvania |
| 13 | Horace Walton | 25 | Head | Office Clerk | Pennsylvania |
| 14 | Edna Walton | 26 | Wife | — | Pennsylvania |
| 15 | Henry W Chapelle | 49 | Head | Printer | New York |
| 16 | Bessie Chapelle | 37 | Wife | — | Pennsylvania |
| 17 | Anna Mulheffery | 72 | Mother-in-law | — | Ireland |
| 18 | John P Knapp | 36 | Head | Tool Maker | Pennsylvania |
| 19 | Emma E Knapp | 34 | Wife | — | Pennsylvania |
| 20 | John J Knapp THIS PERSON | 14 | Son | — | Pennsylvania |
| 21 | Purman Knapp | 11 | Son | — | Pennsylvania |
| 22 | Gertrude Knapp | 4 | Daughter | — | Pennsylvania |
| 23 | William Knapp | 2 | Son | — | Pennsylvania |
| 24 | John S Knapp | 64 | Father | Timekeeper | Pennsylvania |
| 25 | Olaf T Pedersen | 35 | Head | Assistant Engineer | Norway |
| 26 | Katie Pedersen | 35 | Wife | — | Norway |
| 27 | Edith Pedersen | 9 | Daughter | — | Pennsylvania |
| 28 | Olaf Jr Pedersen | 6 | Son | — | Pennsylvania |
| 29 | Victoria Pedersen | 4 | Daughter | — | Pennsylvania |
| 30 | William Titus | 25 | Head | Draftsman | New Jersey |
| 31 | Emma Titus | 27 | Wife | — | Pennsylvania |
| 32 | Alexander Shingle | 43 | Head | Machinist | Pennsylvania |
| 33 | Katie Shingle | 40 | Wife | — | Ireland |
| 34 | Samuel Shingle | 15 | Son | — | Pennsylvania |
| 35 | John Shingle | 12 | Son | — | Pennsylvania |
| 36 | Edward Yorke | 44 | Head | Steel Worker | Pennsylvania |
| 37 | Frances Yorke | 44 | Wife | — | Pennsylvania |
| 38 | Frank Bell | 61 | Father-in-law | Wood Worker | Pennsylvania |
| 39 | Richard Stott | 43 | Head | Bookkeeper | England |
| 40 | Jennie Stott | 42 | Wife | — | Scotland |
| 41 | Samuel Stott | 19 | Son | Apprentice | Pennsylvania |
| 42 | Bella Stott | 18 | Daughter | Stenographer | Pennsylvania |
| 43 | Ambrose Reidmiller | 55 | Head | Tailor | Germany |
| 44 | Annie Reidmiller | 58 | Wife | — | Germany |
| 45 | William Hanford | 32 | Head | Driver | England |
| 46 | Margaret Hanford | 30 | Wife | — | Pennsylvania |
| 47 | Edith Hanford | 8 | Daughter | — | Pennsylvania |
| 48 | Margaret Hanford | 6 | Daughter | — | Pennsylvania |
| 49 | William Jr Hanford | 5 | Son | — | Pennsylvania |
| 50 | Elizabeth Hanford | 2 | Daughter | — | Pennsylvania |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1920 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)