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John Knox — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Nassau-County, New York
Our Model Tree links this John Knox across the 1930 and 1940 US Censuses in Nassau-County, New York (XGBoost, ~Confirmed) — first a son (b.~1922), then head of a 7-person household.
Age 18
b. ~1922
Male
Son
Born: New York
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Nassau-County, New York |
| Surname | Knox |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | New York |
| 1935 Residence (City) | Nassau |
| Additional Details | |
| Occupation | apprentice |
| Industry | Food Ind. |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 0 |
| Highest Grade | No 2 |
| 1935 Residence | New York |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
| Occupation | Apprentice |
| Township / Ward | Wantagh Ny |
| Est. Birth Year | ~1922 |
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 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Harold Knox | Head | — | 49 | ~1891 |
| Harold Knox | Son | — | 23 | ~1917 |
| John Knox | Son | — | 18 | ~1922 |
| Isabel Knox | Daughter | — | 15 | ~1925 |
| Robert Knox | Son | — | 24 | ~1916 |
| Blanche Knox | Spouse | — | 45 | ~1895 |
| Frances Knox | Daughter | — | 15 | ~1925 |
Census Appearances
1930
Queens, New …
Son, age 8
Queens, New York · implied b. ~1922 — 11 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Knox |
| Given Name | John D. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 8 |
| Marital Status | Single |
| Birthplace | New York |
| Father's Birthplace | New Jersey |
| Mother's Birthplace | New York |
| Can Read/Write | Yes |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
1940
Nassau-County, New …
Son, age 18
Nassau-County, New York · implied b. ~1922 — 7 household members
| Surname | Knox |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | New York |
| 1935 Residence (City) | Nassau |
| Occupation | apprentice |
| Industry | Food Ind. |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 0 |
| Highest Grade | No 2 |
| 1935 Residence | New York |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
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 Knox across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Knox
Son · 1940 · age 18 · b. ~1922 · New York
★ You are viewing this record
Sibling
Robert Knox
Sibling · 1940 · age 24
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Frances Knox
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Harold Knox
Sibling · 1940 · age 23
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Isabel Knox
Sibling · 1940 · age 15
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 — Nassau-County, New York
Open full size
1940 US Federal Census — Nassau-County, New York
Page Contents
30 people indexed on this census page (nara:1940:m-t0627-02688-00069)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Edward Ortner | 53 | Head | Printer | New York |
| 42 | Marguerite Ortner | 35 | Wife | — | New York |
| 43 | Edward Ortner | 14 | Son | — | New York |
| 44 | Robert A. La Vigne | 49 | Head | Salesman | New York |
| 45 | Rose A. La Vigne | 49 | Wife | — | New York |
| 46 | George J. Casey | 53 | Brother in law | — | New York |
| 47 | Peter Nicholas | 44 | Head | Shoemaker | Turkey |
| 48 | Clara Nicholas | 35 | Wife | — | Germany |
| 49 | Marjory Nicholas | 11 | Daughter | — | New York |
| 50 | Mary Bauer | 64 | Mother in law | — | Germany |
| 51 | George Heck | 40 | Head | Tool Maker | New Jersey |
| 52 | Florence Heck | 39 | Wife | — | New York |
| 53 | Harry Itzkowitz | 32 | Head | Pharmacist | New York |
| 54 | Sadye Itzkowitz | 32 | Wife | — | New York |
| 55 | Allan Itzkowitz | 9 | Son | — | New York |
| 56 | Barbara Itzkowitz | 5 | Daughter | — | New York |
| 57 | Russell F. Ellingsen | 38 | Head | Superintendent | Minnesota |
| 58 | Irene Ellingsen | 39 | Wife | — | Minnesota |
| 59 | Robert Ellingsen | 14 | Son | — | Minnesota |
| 60 | Catherine Ellingsen | 12 | Daughter | — | Minnesota |
| 61 | Joan Ellingsen | 9 | Daughter | — | Minnesota |
| 62 | Frederick Bahr | 34 | Head | Detective | New York |
| 63 | Minnie Bahr | 31 | Wife | — | New York |
| 64 | Harold Knox | 49 | Head | Com'L Artist | New Jersey |
| 65 | Blanche Knox | 45 | Wife | — | New York |
| 66 | Robert Knox | 24 | Son | Stock Clerk | New York |
| 67 | Harold Knox | 23 | Son | Stock Clerk | New York |
| 68 | John Knox THIS PERSON | 18 | Son | Apprentice | New York |
| 69 | Frances Knox | 15 | Daughter | — | New York |
| 70 | Isabel Knox | 15 | Daughter | — | New York |
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)