JN
John Novak — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Delaware-County, Pennsylvania
Our Model Tree links this John Novak across the 1930 and 1940 US Censuses in Delaware-County, Pennsylvania (XGBoost, ~Confirmed) — first a son (b.~1928), then head of a 9-person household.
Age 12
b. ~1928
Male
Son
Born: Pennsylvania
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Delaware-County, Pennsylvania |
| Surname | Novak |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | CHESTER CITY |
| 1935 Residence (County) | DELAWARE |
| Additional Details | |
| Highest Grade | No 5 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Township / Ward | Chester 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.
9 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Dorothy Novak | Daughter | — | 9 | ~1931 |
| John Novak | Son | — | 12 | ~1928 |
| Frank Novak | Son | — | 25 | ~1915 |
| William Novak | Son | — | 23 | ~1917 |
| Joseph Novak | Son | — | 15 | ~1925 |
| Joseph Novak | Head | — | 66 | ~1874 |
| Josephine Novak | Daughter | — | 26 | ~1914 |
| Mary Novak | Spouse | — | 55 | ~1885 |
| Anthony Novak | Son | — | 19 | ~1921 |
Census Appearances
1930
Philadelphia, Pennsylvania
Son, age 2
Philadelphia, Pennsylvania · implied b. ~1928 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Novak |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Italy |
| Mother's Birthplace | Yugoslavia |
| Can Read/Write | No |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Delaware-County, Pennsylvania
Son, age 12
Delaware-County, Pennsylvania · implied b. ~1928 — 9 household members
| Surname | Novak |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | CHESTER CITY |
| 1935 Residence (County) | DELAWARE |
| Highest Grade | No 5 |
| 1935 Residence | Same place |
| 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 Novak across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Novak
Son · 1940 · age 12 · b. ~1928 · Pennsylvania
★ You are viewing this record
Sibling
Dorothy Novak
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Anthony Novak
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joseph Novak
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Josephine Novak
Sibling · 1940 · age 26
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Frank Novak
Sibling · 1940 · age 25
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Novak
Sibling · 1940 · age 23
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
1940 US Federal Census — Delaware-County, Pennsylvania
Open full size
1940 US Federal Census — Delaware-County, Pennsylvania
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-03489-00417)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Annie C Crawford | 23 | Niece | Waitress | N. Carolina |
| 2 | Joseph W. Vagela | 50 | Head | Machinist | Poland |
| 3 | Nellie Vagela | 50 | Wife | — | Poland |
| 4 | Joseph Jr. Vagela | 22 | Son | Laborer | Pennsylvania |
| 5 | Edward Vagela | 20 | Son | New Worker | Pennsylvania |
| 6 | Joseph Novak | 66 | Head | Socket Maker | Poland |
| 7 | Mary Novak | 55 | Wife | — | Poland |
| 8 | Josephine Novak | 26 | Daughter | Checker | Pennsylvania |
| 9 | Frank Novak | 25 | Son | Laborer | Pennsylvania |
| 10 | William Novak | 23 | Son | Machine Operator | Pennsylvania |
| 11 | Anthony Novak | 19 | Son | Laborer | Pennsylvania |
| 12 | Joseph Novak | 15 | Son | New Worker | Pennsylvania |
| 13 | John Novak THIS PERSON | 12 | Son | — | Pennsylvania |
| 14 | Dorothy Novak | 9 | Daughter | — | Pennsylvania |
| 15 | John Zdum | 50 | Head | Laborer | Poland |
| 16 | Josephine Zdum | 43 | Wife | — | Poland |
| 17 | Agatha Zdum | 26 | Daughter | Twister | Pennsylvania |
| 18 | Josephine Zdum | 21 | Daughter | Packer | Pennsylvania |
| 19 | Valentine Zdum | 20 | Daughter | New Worker | Pennsylvania |
| 20 | Helen Zdum | 19 | Daughter | Packer | Pennsylvania |
| 21 | Joseph Zdum | 17 | Son | — | Pennsylvania |
| 22 | Jane Zdum | 15 | Daughter | — | Pennsylvania |
| 23 | Stella Zdum | 13 | Daughter | — | Pennsylvania |
| 24 | Victoria Zdum | 11 | Daughter | — | Pennsylvania |
| 25 | John Zdum | 9 | Son | — | Pennsylvania |
| 26 | Julia Lagosh | 55 | Head | — | Poland |
| 27 | Mary Lagosh | 32 | Daughter | Cone Winder | Poland |
| 28 | Charles Lagosh | 31 | Son | Inspector | Poland |
| 29 | Philip Lagosh | 28 | Son | Baker | Poland |
| 30 | Sophie Lagosh | 25 | Daughter | Waitress | Pennsylvania |
| 31 | Alexander Lagosh | 24 | Son | Tester | Pennsylvania |
| 32 | Anna Lagosh | 21 | Daughter | Cone Winder | Pennsylvania |
| 33 | Rose Lagosh | 19 | Daughter | New Worker | Pennsylvania |
| 34 | Aniela Jurkowski | 57 | Head | Own Business | Poland |
| 35 | Leon Jurkowski | 26 | Son | Salesman | Pennsylvania |
| 36 | Edward Jurkowski | 20 | Son | Clerk | Pennsylvania |
| 37 | Jane Jurkowski | 16 | Daughter | — | Pennsylvania |
| 38 | Walle W. Knapp | 25 | Head | Automobile Mechanic | New Jersey |
| 39 | Margaret Knapp | 26 | Wife | — | Pennsylvania |
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)