JF
John Finley — 1940 US Census Record
Model Tree available1940 United States Federal Census · Mercer-County, New Jersey
Our Model Tree links this John Finley 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 4-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 | Finley |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 31 |
| Marital Status | Single |
| Birthplace | New Jersey |
| 1935 Residence (City) | Princeton Borough |
| 1935 Residence (County) | Mercer |
| Additional Details | |
| Occupation | Plumber Helper |
| Industry | Building Construction |
| Class of Worker | PW |
| Hours Worked | 2 |
| Income (1939) | 479 |
| Highest Grade | No 8 |
| 1935 Residence | Same Place |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
| Occupation | Plumber Helper |
| Township / Ward | Princeton Borough |
| 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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| William Finley | Head | — | 63 | ~1877 |
| John Finley | Son | — | 31 | ~1909 |
| Helen Finley | Daughter | — | 22 | ~1918 |
| Emma Finley | Spouse | — | 57 | ~1883 |
Census Appearances
1920
Mercer, New …
Son, age 9
Mercer, New Jersey · implied b. ~1911 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Finley |
| Given Name | John M |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 9 |
| Marital Status | Single |
| Birthplace | New Jersey |
| Father's Birthplace | New Jersey |
| Mother's Birthplace | New Jersey |
| Can Read | Yes |
| Speaks English | Yes |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
1930
Mercer, New …
Son, age 20
Mercer, New Jersey · implied b. ~1910 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Finley |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | New Jersey |
| Father's Birthplace | New Jersey |
| Mother's Birthplace | New Jersey |
| Occupation | Apprentice |
| Industry | Plumbing |
| Class of Worker | W |
| 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 — 4 household members
| Surname | Finley |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 31 |
| Marital Status | Single |
| Birthplace | New Jersey |
| 1935 Residence (City) | Princeton Borough |
| 1935 Residence (County) | Mercer |
| Occupation | Plumber Helper |
| Industry | Building Construction |
| Class of Worker | PW |
| Hours Worked | 2 |
| Income (1939) | 479 |
| Highest Grade | No 8 |
| 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 Finley across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father William Finley (~0.92 confidence) and father William Finley (~0.92 confidence) and father William Finley (~0.92 confidence) and mother Emma Finley (~0.92 confidence) and mother Emma Finley (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
William Finley
b. ~1871
Source father
● Household
· direct · ~0.92
Father
William Finley
b. ~1877
Source father
● Household
· direct · ~0.92
Father
William Finley
b. ~1877
Source father
● Household
· direct · ~0.92
Mother
Emma Finley
b. ~1878
Source mother
● Household
· direct · ~0.92
Mother
Emma Finley
b. ~1883
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Finley
Son · 1940 · age 31 · b. ~1909 · New Jersey
★ You are viewing this record
Sibling
Helen Finley
Sibling · 1940 · age 22
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-t0627-02357-00518)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Frank Giovannantonio | 49 | Head | Janitor | Italy |
| 2 | Pierina Giovannantonio | 52 | Wife | — | Italy |
| 3 | Jane Giovannantonio | 19 | Daughter | Stenographer | New Jersey |
| 4 | Robert Giovannantonio | 14 | Son | — | New Jersey |
| 5 | Alexander Giovannantonio | 10 | Son | — | New Jersey |
| 6 | Fiorindo Verona | 52 | Head | Landscape Gardener | Italy |
| 7 | Lucy Verona | 49 | Wife | — | Italy |
| 8 | Morris Hammerman | 49 | Head | Janitor | Austria |
| 9 | Augusta Hammerman | 49 | Wife | — | Russia |
| 10 | Peter Moran | 33 | Head | Chain Store Manager | Pennsylvania |
| 11 | Emily Moran | 28 | Wife | Registered Nurse | New Jersey |
| 12 | William Moran | 3 | Son | — | New Jersey |
| 13 | John D. Cox | 67 | Head | Store Clerk | New Jersey |
| 14 | Mary E. Cox | 59 | Wife | — | Massachusetts |
| 15 | Henry Danziger | 52 | Lodger | Watch Maker | England |
| 16 | Melvin Bailey | 32 | Head | Timekeeper | New Jersey |
| 17 | Emma Bailey | 28 | Wife | — | New Jersey |
| 18 | Edna Mae Bailey | 8 | Daughter | — | New Jersey |
| 19 | Barbara Ann Bailey | 1 | Daughter | — | New Jersey |
| 20 | Benjamin Watts | 45 | Lodger | House Painter | New Jersey |
| 21 | Lillian Willis | 26 | Lodger | Waitress | New Jersey |
| 22 | Joseph J. Wareham | 43 | Head | Operator | Massachusetts |
| 23 | Gertrude Wareham | 42 | Wife | — | Connecticut |
| 24 | William Finley | 63 | Head | Landscape Gardener | New Jersey |
| 25 | Emma Finley | 57 | Wife | Maid | New Jersey |
| 26 | John Finley THIS PERSON | 31 | Son | Plumber Helper | New Jersey |
| 27 | Helen Finley | 22 | Daughter | Nurse | New Jersey |
| 28 | Mary L. Everts | 81 | Head | — | New Jersey |
| 29 | Mary L. Everts | 42 | Daughter | — | New Jersey |
| 30 | John Q. A. Baker | 76 | Head | — | New Jersey |
| 31 | Elizabeth Collins | 61 | Head | — | New Jersey |
| 32 | Leroy Halamar | 45 | Lodger | Upholsterer | Pennsylvania |
| 33 | Mary Finnegan | 53 | Head | — | New Jersey |
| 34 | Johanna Finnegan | 86 | Mother | — | New York |
| 35 | Mabel Dorsey | 48 | Head | Childs Nurse | New York |
| 36 | Catherine Dorsey | 23 | Daughter | Childs Nurse | New York |
| 37 | Walter Dorsey | 19 | Son | Messenger | New Jersey |
| 38 | Thomas Dorsey | 15 | Son | — | New Jersey |
| 39 | Joseph Dorsey | 11 | Son | — | New Jersey |
| 40 | Arthur Dorsey | 8 | Son | — | New Jersey |
Pedigree Summary
John + 1 sibling
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)