JC
John Cleary — 1940 US Census Record
Model Tree available1940 United States Federal Census · Mercer-County, New Jersey
Our Model Tree links this John Cleary across the 1920, 1930 and 1940 US Censuses in Mercer-County, New Jersey (XGBoost, ~Confirmed), with identified parents William & William — first a son (b.~1909), then head of a 5-person household.
Age 31
b. ~1909
Male
Son
Born: New Jersey
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Mercer-County, New Jersey |
| Surname | Cleary |
| Given Name | John J. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 31 |
| Marital Status | Single |
| Birthplace | New Jersey |
| 1935 Residence (City) | Trenton City |
| 1935 Residence (County) | Mercer |
| Additional Details | |
| Occupation | Library Clerk |
| Industry | State Library |
| Class of Worker | GW |
| Hours Worked | 40 |
| Income (1939) | 246 |
| Highest Grade | H-4 |
| 1935 Residence | Same place |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
| Occupation | Library Clerk |
| Township / Ward | Trenton City |
| Est. Birth Year | ~1909 |
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 |
|---|---|---|---|---|
| John Cleary | Son | — | 31 | ~1909 |
| Mary Cleary | Daughter | — | 26 | ~1914 |
| William Cleary | Head | — | 57 | ~1883 |
| Margaret Cleary | Spouse | — | 57 | ~1883 |
| William Cleary | Son | — | 29 | ~1911 |
Census Appearances
1920
Mercer, New …
Son, age 11
Mercer, New Jersey · implied b. ~1909 — 11 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Clarey |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | New Jersey |
| Father's Birthplace | New Jersey |
| Mother's Birthplace | New Jersey |
| Occupation | none |
| 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 21
Mercer, New Jersey · implied b. ~1909 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cleary |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | New Jersey |
| Father's Birthplace | New Jersey |
| Mother's Birthplace | New Jersey |
| Can Read/Write | Yes |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
1940
Mercer-County, New …
Son, age 31
Mercer-County, New Jersey · implied b. ~1909 — 5 household members
| Surname | Cleary |
| Given Name | John J. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 31 |
| Marital Status | Single |
| Birthplace | New Jersey |
| 1935 Residence (City) | Trenton City |
| 1935 Residence (County) | Mercer |
| Occupation | Library Clerk |
| Industry | State Library |
| Class of Worker | GW |
| Hours Worked | 40 |
| Income (1939) | 246 |
| Highest Grade | H-4 |
| 1935 Residence | Same place |
| 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 Cleary across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father William Clarey (~0.92 confidence) and father William Cleary (~0.92 confidence) and father William Cleary (~0.92 confidence) and mother Margaret Clarey (~0.92 confidence) and mother Margaret Cleary (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
William Clarey
b. ~1885
Source father
● Household
· direct · ~0.92
Father
William Cleary
b. ~1883
Source father
● Household
· direct · ~0.92
Father
William Cleary
b. ~1884
Source father
● Household
· direct · ~0.92
Mother
Margaret Clarey
b. ~1885
Source mother
● Household
· direct · ~0.92
Mother
Margaret Cleary
b. ~1883
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Cleary
Son · 1940 · age 31 · b. ~1909 · New Jersey
★ You are viewing this record
Sibling
Mary Cleary
Sibling · 1940 · age 26
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Cleary
Sibling · 1940 · age 29
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 — 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-t0627-02434-00102)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | William W. Thomas | 46 | Head | Accountant | New Jersey |
| 2 | Amy G. Thomas | 44 | Wife | — | New Jersey |
| 3 | Martin Mayer | 61 | Head | Teacher Music | New Jersey |
| 4 | Alice W. Mayer | 60 | Wife | — | New Jersey |
| 5 | Anna Gannon | 67 | Head | Seamstress | New Jersey |
| 6 | Karin Isabell Gannon | 51 | Nice | Decorator | New Jersey |
| 7 | Ann C. De Arey | 74 | Head | — | New Jersey |
| 8 | Thomas W. De Arey | 73 | Brother | Helper | New Jersey |
| 9 | Casey John De Arey | 47 | Roomer | Janitor | New Jersey |
| 10 | Phineas Potters | 57 | Head | Rubber Worker | New Jersey |
| 11 | Hetty B. Potters | 58 | Wife | — | New Jersey |
| 12 | Clarence Potters | 36 | Son | Office Worker | New Jersey |
| 13 | Clara Potters | 33 | Daughter | Saleslady | New Jersey |
| 14 | Delores Potters | 10 | Daughter | — | New Jersey |
| 15 | William A. Cleary | 57 | Head | Custodian | New Jersey |
| 16 | Margaret J. Cleary | 57 | Wife | — | New Jersey |
| 17 | John J. Cleary THIS PERSON | 31 | Son | Library Clerk | New Jersey |
| 18 | William A. Jr. Cleary | 29 | Son | Rewrite Clerk | New Jersey |
| 19 | Mary A. Cleary | 26 | Daughter | Reg Nurse | New Jersey |
| 20 | Jane E. Myler | 74 | Head | — | New Jersey |
| 21 | Mary W. Thompson | 82 | Boarding | — | New Jersey |
| 22 | Edgar G. Skillman | 59 | Head | Asst Manager | New Jersey |
| 23 | Gertie V. Skillman | 52 | Wife | — | Penna |
| 24 | Tilghman J. Skillman | 30 | Son | Salesman | New Jersey |
| 25 | Douglas B. Skillman | 21 | Son | — | New Jersey |
| 26 | Russell D. Skillman | 19 | Son | 2Nd Class Seaman | New Jersey |
| 27 | Vincent Casoli | 19 | Roomer | — | New York |
| 28 | Lincoln Raab | 20 | Roomer | — | New Jersey |
| 29 | Alice C. Bentlow | 59 | Head | Teacher | New York |
| 30 | Alice A. Bentlow | 18 | Nicee | — | New York |
| 31 | Anna B. Green | 60 | Head | Clerk | New Jersey |
| 32 | George W. Webb | 46 | Head | Real Estate | Penna |
| 33 | Laura L. Webb | 36 | Wife | — | New Jersey |
| 34 | Joan L. Webb | 5 | Daughter | — | New Jersey |
| 35 | William Parker | 62 | Head | Potter | England |
| 36 | Adelaide Q. Parker | 63 | Wife | — | Germany |
| 37 | Clara Q. Jewell | 53 | Head | Machine Oper | New Jersey |
| 38 | Esther Kaplan | 38 | Roomer | Cashier | New Jersey |
| 39 | Wilbur Dr. Watt | 56 | Head | Physician | New Jersey |
| 40 | Elizabeth D. Watt | 51 | Wife | — | New Jersey |
Related Census Records
Pedigree Summary
John + 2 siblings
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)