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John Sullivan — 1940 US Census Record
Model Tree available1940 United States Federal Census · Hudson-County, New Jersey
Our Model Tree links this John Sullivan across the 1920, 1930 and 1940 US Censuses in Hudson-County, New Jersey (XGBoost, ~Confirmed), with identified parents Horace & Michael — first a son (b.~1915), then head of a 6-person household.
Age 25
b. ~1915
Male
Son
Born: New Jersey
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Hudson-County, New Jersey |
| Surname | Sullivan |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | New Jersey |
| 1935 Residence (City) | Jersey City |
| 1935 Residence (County) | Hudson |
| Additional Details | |
| Occupation | Clerk |
| Industry | Chemical Plant |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1360 |
| Highest Grade | H 4 |
| 1935 Residence | Same house |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
| Occupation | Clerk |
| Township / Ward | Jersey City |
| Est. Birth Year | ~1915 |
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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Elizabeth Sullivan | Daughter | — | 17 | ~1923 |
| Margaret Sullivan | Daughter | — | 16 | ~1924 |
| Mary Sullivan | Daughter | — | 26 | ~1914 |
| Horace Sullivan | Head | — | 52 | ~1888 |
| John Sullivan | Son | — | 25 | ~1915 |
| Bridget Sullivan | Spouse | — | 48 | ~1892 |
Census Appearances
1920
Hudson, New …
Son, age 5
Hudson, New Jersey · implied b. ~1915 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Sullivan |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | New Jersey |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
1930
Hudson, New …
Son, age 15
Hudson, New Jersey · implied b. ~1915 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Sullivan |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | New Jersey |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Can Read/Write | Yes |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
1940
Hudson-County, New …
Son, age 25
Hudson-County, New Jersey · implied b. ~1915 — 6 household members
| Surname | Sullivan |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | New Jersey |
| 1935 Residence (City) | Jersey City |
| 1935 Residence (County) | Hudson |
| Occupation | Clerk |
| Industry | Chemical Plant |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1360 |
| Highest Grade | H 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 John Sullivan across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Horace Sullivan (~0.92 confidence) and father Michael Sullivan (~0.92 confidence) and father John Sullivan (~0.92 confidence) and mother Margaret Sullivan (~0.92 confidence) and mother Hannah Sullivan (~0.92 confidence) and mother Bridget Sullivan (~0.92 confidence). The pedigree spans 1 generation with 6 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Horace Sullivan
b. ~1888
Source father
● Household
· direct · ~0.92
Father
Michael Sullivan
b. ~1867
Source father
● Household
· direct · ~0.92
Father
John Sullivan
b. ~1884
Source father
● Household
· direct · ~0.92
Mother
Margaret Sullivan
b. ~1875
Source mother
● Household
· direct · ~0.92
Mother
Hannah Sullivan
b. ~1892
Source mother
● Household
· direct · ~0.92
Mother
Bridget Sullivan
b. ~1892
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Sullivan
Son · 1940 · age 25 · b. ~1915 · New Jersey
★ You are viewing this record
Sibling
Margaret Sullivan
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Sullivan
Sibling · 1940 · age 26
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Elizabeth Sullivan
Sibling · 1940 · age 17
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 — Hudson-County, New Jersey
Open full size
1940 US Federal Census — Hudson-County, New Jersey
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02405-00314)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Anna Zirpolo | 37 | Head | — | New York |
| 2 | Rosa Zirpolo | 35 | Sister | Operator | New York |
| 3 | Dominick Zirpolo | 33 | Brother | Car Painter | New York |
| 4 | Joseph Zirpolo | 31 | Brother | Press Operator | New York |
| 5 | Otto H. Bergyus | 42 | Head | Accountant | New Jersey |
| 6 | Gertrude Bergyus | 40 | Wife | Stenographer | New Jersey |
| 7 | Eileen Bergyus | 10 | Daughter | — | New Jersey |
| 8 | Gertrude Bergyus | 8 | Daughter | — | New Jersey |
| 9 | Otto Jr. Bergyus | 6 | Son | — | New Jersey |
| 10 | Max Muller | 44 | Head | Carpenter | Germany |
| 11 | Marie Muller | 76 | Mother | — | Germany |
| 12 | Martha Muller | 37 | Sister | Typist | Germany |
| 13 | John Muller | 46 | Head | Packer | Germany |
| 14 | Pauline Muller | 46 | Wife | — | New Jersey |
| 15 | Charles Neudecker | 38 | Head | Wood Finisher | New Jersey |
| 16 | Rose Neudecker | 37 | Wife | Box Maker | Pennsylvania |
| 17 | Michael Novallo | 27 | Boarder | Painter | New Jersey |
| 18 | John Contine | 30 | Head | Steam Inspector | New Jersey |
| 19 | Madeline Contine | 30 | Wife | — | New Jersey |
| 20 | John Jr. Contine | 2 | Son | — | New Jersey |
| 21 | Frances Sweeney | 55 | Head | Sewing Operator | New Jersey |
| 22 | William Sweeney | 30 | Son | Agent | New Jersey |
| 23 | Joseph Kneps | 46 | Head | Hatter | Austria |
| 24 | Gertrude Kneps | 39 | Wife | — | New York |
| 25 | Robert Kneps | 17 | Son | — | New Jersey |
| 26 | Harold Kneps | 15 | Son | — | New Jersey |
| 27 | Carrie Drucker | 38 | Head | — | New York |
| 28 | Annette Drucker | 13 | Daughter | — | New Jersey |
| 29 | Gloria Drucker | 5 | Daughter | — | New Jersey |
| 30 | Ben Markus | 43 | Head | Clerk | New York |
| 31 | Kathryn Markus | 42 | Wife | — | New York |
| 32 | Seymour Markus | 19 | Son | Butcher | New Jersey |
| 33 | Anita Markus | 13 | Daughter | — | New Jersey |
| 34 | Horace Sullivan | 52 | Head | Fireman | Eire |
| 35 | Bridget Sullivan | 48 | Wife | — | Eire |
| 36 | Mary Sullivan | 26 | Daughter | Clerk | New Jersey |
| 37 | John Sullivan THIS PERSON | 25 | Son | Clerk | New Jersey |
| 38 | Elizabeth Sullivan | 17 | Daughter | — | New Jersey |
| 39 | Margaret Sullivan | 16 | Daughter | — | New Jersey |
| 40 | Ben Baumgarten | 47 | Head | Druggist | Austria |
Pedigree Summary
John + 3 siblings
Gen 1 · 6 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)