JC
James Cox — 1940 US Census Record
Model Tree available1940 United States Federal Census · Mercer-County, New Jersey
Our Model Tree links this James Cox across the 1910, 1920, 1930 and 1940 US Censuses in Mercer-County, New Jersey (XGBoost, ~Confirmed), with identified parents James & Amanda — first a head (b.~1904), then head of a 4-person household.
Age 36
b. ~1904
Male
Head
Born: New Jersey
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Mercer-County, New Jersey |
| Surname | Cox |
| Given Name | James A. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 36 |
| Marital Status | Married |
| Birthplace | New Jersey |
| 1935 Residence (City) | Princeton |
| 1935 Residence (County) | Mercer |
| Additional Details | |
| Occupation | Owner |
| Industry | Candy store |
| Class of Worker | OA |
| Hours Worked | 70 |
| Income (1939) | 0 |
| Highest Grade | C 4 |
| 1935 Residence | Same house |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
| Occupation | Owner |
| Township / Ward | Princeton |
| Est. Birth Year | ~1904 |
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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to James | Age | Birth yr |
|---|---|---|---|---|
| James Cox | Head | — | 36 | ~1904 |
| Donald Cox | Son | — | 2 | ~1938 |
| Robert Cox | Son | — | 3 | ~1937 |
| Helen Cox | Spouse | — | 32 | ~1908 |
Census Appearances
1910
Mercer, New …
Son, age 2
Mercer, New Jersey · implied b. ~1908 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cox |
| Given Name | James |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | New Jersey |
| Father's Birthplace | New Jersey |
| Mother's Birthplace | New York |
| Occupation | none |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
1920
Mercer, New …
Son, age 12
Mercer, New Jersey · implied b. ~1908 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cox |
| Given Name | James |
| 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
Mercer, New …
Son, age 22
Mercer, New Jersey · implied b. ~1908 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cox |
| Given Name | James J. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Married |
| Birthplace | New Jersey |
| Age at First Marriage | 22 |
| Father's Birthplace | New Jersey |
| Mother's Birthplace | New York |
| Occupation | shipping clerk |
| Industry | Univ. Press |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
1940
Mercer-County, New …
Head, age 36
Mercer-County, New Jersey · implied b. ~1904 — 4 household members
| Surname | Cox |
| Given Name | James A. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 36 |
| Marital Status | Married |
| Birthplace | New Jersey |
| 1935 Residence (City) | Princeton |
| 1935 Residence (County) | Mercer |
| Occupation | Owner |
| Industry | Candy store |
| Class of Worker | OA |
| Hours Worked | 70 |
| Income (1939) | 0 |
| Highest Grade | C 4 |
| 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 James Cox across 4 US Census years (1910, 1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father James Cox (~0.92 confidence) and mother Amanda Cox (~0.92 confidence) and father James Cox (~0.92 confidence) and mother Amanda Cox (~0.92 confidence) and mother Amanda Cox (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
James Cox
b. ~1877
Source father
● Household
· direct · ~0.92
Mother
Amanda Cox
b. ~1877
Source mother
● Household
· direct · ~0.92
Father
James Cox
b. ~1878
Source father
● Household
· direct · ~0.92
Mother
Amanda Cox
b. ~1878
Source mother
● Household
· direct · ~0.92
Mother
Amanda Cox
b. ~1878
Source mother
● Household
· direct · ~0.92
This person
Anchor record
James Cox
Head · 1940 · age 36 · b. ~1904 · 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 — 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-t0627-02357-00545)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | James A. Cox THIS PERSON | 36 | Head | Owner | New Jersey |
| 42 | Helen F. Cox | 32 | Wife | — | New Jersey |
| 43 | Robert Cox | 3 | Son | — | New Jersey |
| 44 | Donald Cox | 2 | Son | — | New Jersey |
| 45 | Edmund D. Cook | 37 | Head | Salesman | New Jersey |
| 46 | Alice Cook | 28 | Wife | — | New Jersey |
| 47 | Edmund H. Cook | 13 | Son | — | New Jersey |
| 48 | Ridgely W. Cook | 10 | Son | — | New Jersey |
| 49 | Suzanne Reese | 4 | Stepdaughter | — | New Jersey |
| 50 | Adell Stewart | 30 | Servant | Maid | Virginia |
| 51 | Tadwell Felmer | 64 | Head | Owner | Virginia |
| 52 | Maude Felmer | 41 | Wife | — | New York |
| 53 | Phillip Felmer | 15 | Son | — | Pennsylvania |
| 54 | Charles E. Zapf | 73 | Head | — | New Jersey |
| 55 | Leila Zapf | 67 | Wife | Proprietor | New Jersey |
| 56 | Claudine Zapf | 40 | Daughter | Principal | New Jersey |
| 57 | Mershon Greene | 80 | Boarder | Carpenter | New Jersey |
| 58 | James Tyne | 73 | Head | — | New Jersey |
| 59 | Elizabeth Tyne | 70 | Wife | — | New Jersey |
| 60 | May Bidwell | 50 | Head | 78 | New Jersey |
| 61 | Thomas Mcquade | 58 | Head | Janitor | New Jersey |
| 62 | Mary Mcquade | 58 | Wife | — | New Jersey |
| 63 | Robert Mcquade | 20 | Son | Bookkeeper | New Jersey |
| 64 | Laurence Butterfoss | 24 | Son-in-law | Salesman | New Jersey |
| 65 | Helen Butterfoss | 25 | Daughter | Secretary | New Jersey |
| 66 | Louis Diehl | 78 | Head | — | New Jersey |
| 67 | Katherine Diehl | 77 | Wife | — | New Jersey |
| 68 | Evelyn E. Bruch | 25 | Lodger | Pamphlet Binder | Pennsylvania |
| 69 | Mary Anderson | 67 | Head | — | New Jersey |
| 70 | Wesley Owens | 36 | Roomer | Manager | New Jersey |
| 71 | Alice A. Rice | 72 | Head | — | New Hampshire |
| 72 | Joseph S. Pierson | 32 | Head | Teacher | New Jersey |
| 73 | Claire Pierson | 31 | Wife | Teacher | New Jersey |
| 74 | William C. Archie | 36 | Head | Instructor | North Carolina |
| 75 | Ruth Archie | 27 | Wife | Secretary | Virginia |
| 76 | Thomas B. Lanahan | 41 | Head | Salesman | New Jersey |
| 77 | Mary T. Lanahan | 42 | Wife | Teacher | New Jersey |
| 78 | Thomas B. Iii Lanahan | 19 | Son | — | New Jersey |
| 79 | Richard P. Lanahan | 5 | Son | — | New Jersey |
| 80 | Dorothy Lenahan | 29 | Maid | Maid | New Jersey |
Pedigree Summary
James
Gen 1 · 5 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)