JF
John Frederick — 1940 US Census Record
Model Tree available1940 United States Federal Census · Union-County, New Jersey
Our Model Tree links this John Frederick across the 1920, 1930 and 1940 US Censuses in Union-County, New Jersey (XGBoost, ~Confirmed), with identified parents John & Louise — first a head (b.~1907), then head of a 5-person household.
Age 33
b. ~1907
Male
Head
Born: New Jersey
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Union-County, New Jersey |
| Surname | Frederick |
| Given Name | John J. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 33 |
| Marital Status | Married |
| Birthplace | New Jersey |
| 1935 Residence (City) | Roselle Park Borough |
| 1935 Residence (County) | Union |
| Additional Details | |
| Occupation | Plumber |
| Industry | Plumbing Corp |
| Class of Worker | PW |
| Hours Worked | 35 |
| Income (1939) | 1820 |
| Highest Grade | No 8 |
| 1935 Residence | Same House |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
| Occupation | Plumber |
| Township / Ward | Roselle Park Borough |
| Est. Birth Year | ~1907 |
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 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Marian Frederick | Spouse | — | 32 | ~1908 |
| Marian Frederick | Daughter | — | 9 | ~1931 |
| John Frederick | Head | — | 33 | ~1907 |
| John Frederick | Son | — | 6 | ~1934 |
| Robert Frederick | Son | — | 2 | ~1938 |
Census Appearances
1920
Union, New …
Son, age 12
Union, New Jersey · implied b. ~1908 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Frederick |
| Given Name | John Jr |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | New Jersey |
| Father's Birthplace | New Jersey |
| Mother's Birthplace | New Jersey |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
1930
Union, New …
Head, age 23
Union, New Jersey · implied b. ~1907 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Frederick |
| Given Name | John H. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Married |
| Birthplace | New Jersey |
| Age at First Marriage | 22 |
| Father's Birthplace | New Jersey |
| Mother's Birthplace | New Jersey |
| Occupation | Plumber |
| Industry | Building |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 45 |
| Radio Set | R |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
1940
Union-County, New …
Head, age 33
Union-County, New Jersey · implied b. ~1907 — 5 household members
| Surname | Frederick |
| Given Name | John J. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 33 |
| Marital Status | Married |
| Birthplace | New Jersey |
| 1935 Residence (City) | Roselle Park Borough |
| 1935 Residence (County) | Union |
| Occupation | Plumber |
| Industry | Plumbing Corp |
| Class of Worker | PW |
| Hours Worked | 35 |
| Income (1939) | 1820 |
| Highest Grade | No 8 |
| 1935 Residence | Same House |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
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 Frederick across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father John Frederick (~0.92 confidence) and mother Louise Frederick (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
John Frederick
b. ~1874
Source father
● Household
· direct · ~0.92
Mother
Louise Frederick
b. ~1875
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Frederick
Head · 1940 · age 33 · b. ~1907 · New Jersey
★ 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 — Union-County, New Jersey
Open full size
1940 US Federal Census — Union-County, New Jersey
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02389-00175)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Rose Wojton | 33 | Head | Salesgirl | Ohio |
| 2 | John Rauch | 45 | Lodger | Machinist | New York |
| 3 | Fred Froschauer | 47 | Head | Checking Clerk | New Jersey |
| 4 | Eva Froschauer | 51 | Wife | Machinist | New Jersey |
| 5 | Allen Froschauer | 18 | Son | Packer | New Jersey |
| 6 | Ruth Froschauer | 15 | Daughter | — | New Jersey |
| 7 | Fred Mcevoy | 37 | Head | Stock Room Clerk | New Jersey |
| 8 | Louise Mcevoy | 30 | Wife | — | New Jersey |
| 9 | Fred Mcevoy | 6 | Son | — | New Jersey |
| 10 | Robert Mcevoy | 4 | Son | — | New Jersey |
| 11 | Anna Colbell | 68 | Mother-in-law | — | New Jersey |
| 12 | William Ogden | 25 | Head | Machinist | New Jersey |
| 13 | Vivian Ogden | 22 | Wife | — | New Jersey |
| 14 | Patricia J. Ogden | 2 | Daughter | — | New Jersey |
| 15 | John J. Frederick THIS PERSON | 33 | Head | Plumber | New Jersey |
| 16 | Marian Frederick | 32 | Wife | — | New Jersey |
| 17 | Marian Frederick | 9 | Daughter | — | New Jersey |
| 18 | John Frederick | 6 | Son | — | New Jersey |
| 19 | Robert Frederick | 2 | Son | — | New Jersey |
| 20 | Aime Nault | 37 | Head | Belt Maker | New York |
| 21 | Henrietta Nault | 33 | Wife | — | New York |
| 22 | Howard Palmer | 30 | Head | Driver | New Jersey |
| 23 | Ruth Palmer | 27 | Daughter | — | New York |
| 24 | J. B. Rawson | 14 | Lodger | — | New York |
| 25 | Marjorie Rawson | 14 | Lodger | — | New York |
| 26 | Ewald Pritzgula | 29 | Head | Chief Clerk | Lithuania |
| 27 | Josephine Pritzgula | 22 | Wife | — | New Jersey |
| 28 | Joan Pritzgula | 3 | Daughter | — | New Jersey |
| 29 | Nancy Pritzgula | 2 | Daughter | — | New Jersey |
| 30 | Clara La Terre | 45 | Head | — | New York |
| 31 | Harvey La Terre | 12 | Son | — | New Jersey |
| 32 | Ralph Barnes | 45 | Head | Salesman | Missouri |
| 33 | Genevieve Barnes | 35 | Wife | — | New York |
| 34 | Ralph J. Barnes | 10 | Son | — | New Jersey |
| 35 | Harry Nodes | 40 | Head | Toolmaker | Pennsylvania |
| 36 | Emilie Nodes | 41 | Wife | — | New York |
| 37 | Margaret Nodes | 11 | Daughter | — | New York |
| 38 | Robert Nodes | 8 | Son | — | New York |
| 39 | John Slattery | 46 | Head | Pipe Fitter | New Jersey |
| 40 | Catherine Slattery | 27 | Wife | — | Pennsylvania |
Pedigree Summary
John
Gen 1 · 2 parents
~0.92
Max depth 4 (1900–1950 window)
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)