JK
John Kramer — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Mercer-County, New Jersey
Our Model Tree links this John Kramer across the 1930 and 1940 US Censuses in Mercer-County, New Jersey (XGBoost, ~Confirmed) — first a head (b.~1891), then head of a 10-person household.
Age 49
b. ~1891
Male
Head
Born: Poland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Mercer-County, New Jersey |
| Surname | Kramer |
| Given Name | John |
| Relationship to Head | head |
| Sex | M |
| Color / Race | White |
| Age | 49 |
| Marital Status | Married |
| Birthplace | Poland |
| 1935 Residence (City) | Trenton City |
| 1935 Residence (County) | Mercer |
| Naturalization Status | Naturalized |
| Additional Details | |
| Occupation | molder |
| Industry | Foundry |
| Class of Worker | PW |
| Hours Worked | 24 |
| Income (1939) | 1000 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth Country | Poland |
| Birthplace (normalized) | poland |
| Occupation | Molder |
| Township / Ward | Trenton City |
| Est. Birth Year | ~1891 |
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.
10 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Viola Kramer | Daughter | — | 19 | ~1921 |
| Stephanie Kramer | Daughter | — | 17 | ~1923 |
| June Kramer | Daughter | — | 11 | ~1929 |
| Helen Kramer | Daughter | — | 13 | ~1927 |
| John Kramer | Head | — | 49 | ~1891 |
| Frederick Kramer | Son | — | 15 | ~1925 |
| Thaddeus Kramer | Son | — | 20 | ~1920 |
| Henry Kramer | Son | — | 22 | ~1918 |
| Leon Kramer | Son | — | 23 | ~1917 |
| Veronica Kramer | Spouse | — | 43 | ~1897 |
Census Appearances
1930
Mercer, New …
Head, age 39
Mercer, New Jersey · implied b. ~1891 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kramarz |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 39 |
| Marital Status | Married |
| Birthplace | Poland |
| Naturalization Status | Naturalized |
| Year of Immigration | 1912 |
| Age at First Marriage | 24 |
| Father's Birthplace | Poland |
| Mother's Birthplace | Poland |
| Occupation | Moulder |
| Industry | Iron Foundry |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | Polish |
| Home Owned/Rented | O |
| Home Value / Rent | 1500 |
| Birth Country | Poland |
| Birthplace (normalized) | poland |
1940
Mercer-County, New …
Head, age 49
Mercer-County, New Jersey · implied b. ~1891 — 10 household members
| Surname | Kramer |
| Given Name | John |
| Relationship to Head | head |
| Sex | M |
| Color / Race | White |
| Age | 49 |
| Marital Status | Married |
| Birthplace | Poland |
| 1935 Residence (City) | Trenton City |
| 1935 Residence (County) | Mercer |
| Naturalization Status | Naturalized |
| Occupation | molder |
| Industry | Foundry |
| Class of Worker | PW |
| Hours Worked | 24 |
| Income (1939) | 1000 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth Country | Poland |
| Birthplace (normalized) | poland |
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 Kramer across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
John Kramer
Head · 1940 · age 49 · b. ~1891 · New Jersey
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Mercer-County, New Jersey
Open full size
1940 US Federal Census — Mercer-County, New Jersey
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02435-00306)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Mary Robak | 28 | wife | Packer | New Jersey |
| 42 | Katherine Robak | 49 | mother | — | Poland |
| 43 | Henry Robak | 20 | brother | Field Work | New Jersey |
| 44 | Irene Robak | 17 | sister | Finisher | New Jersey |
| 45 | Eleanor Robak | 9 | sister | — | New Jersey |
| 46 | Mary Stencel | 70 | head | — | Poland |
| 47 | Stella Jastrzebski | 43 | daughter | — | New Jersey |
| 48 | Joseph Stencel | 46 | son | Caster | Poland |
| 49 | Edmund Stencel | 37 | son | — | Pennsylvania |
| 50 | Stanley Stencel | 35 | son | — | Pennsylvania |
| 51 | Anthony Dolinski | 64 | head | Laborer | Poland |
| 52 | Wladyslawa Dolinski | 59 | wife | — | Poland |
| 53 | Mary Dolinski | 29 | daughter | Presser | Poland |
| 54 | Stella Dolinski | 26 | daughter | Presser | Poland |
| 55 | Edward Pryle | 30 | head | Salesman | New Jersey |
| 56 | Hilda Pryle | 27 | wife | — | Germany |
| 57 | Robert Pryle | 6 | son | — | New Jersey |
| 58 | John Kramer THIS PERSON | 49 | head | Molder | Poland |
| 59 | Veronica Kramer | 43 | wife | Cleaner | Poland |
| 60 | Leon Kramer | 23 | son | Assembler | New Jersey |
| 61 | Henry Kramer | 22 | son | Loader Of Cars | New Jersey |
| 62 | Thaddeus Kramer | 20 | son | Molder Layer | New Jersey |
| 63 | Viola Kramer | 19 | daughter | Inspector | New Jersey |
| 64 | Stephanie Kramer | 17 | daughter | — | New Jersey |
| 65 | Frederick Kramer | 15 | son | — | New Jersey |
| 66 | Helen Kramer | 13 | daughter | — | New Jersey |
| 67 | June Kramer | 11 | daughter | — | New Jersey |
| 68 | John Olech | 44 | head | Slip-Worker | Poland |
| 69 | Margaret Olech | 44 | wife | Yarn Maker | Poland |
| 70 | Stanley Olech | 19 | son | Stock Room | New Jersey |
| 71 | Sophie Olech | 18 | daughter | — | New Jersey |
| 72 | Frank Olech | 14 | son | — | New Jersey |
| 73 | Albert Carr | 33 | head | Machinist | New Jersey |
| 74 | Sara Carr | 32 | wife | — | New Jersey |
| 75 | Thomas Carr | 15 | son | — | New Jersey |
| 76 | Robert Carr | 12 | son | — | New Jersey |
| 77 | Donald Carr | 6 | son | — | New Jersey |
| 78 | Stanley Maziarz | 57 | head | Molder | Poland |
| 79 | Theresa Maziarz | 50 | wife | — | Poland |
| 80 | Joseph Maziarz | 27 | son | Brake Line | New Jersey |
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)