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John Monahan — 1940 US Census Record
Model Tree available1940 United States Federal Census · Passaic-County, New Jersey
Our Model Tree links this John Monahan across the 1920, 1930 and 1940 US Censuses in Passaic-County, New Jersey (XGBoost, ~Confirmed), with identified parents Edward & Margaret — first a son (b.~1915), then head of a 3-person household.
Age 25
b. ~1915
Male
Son
Born: New Jersey
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Passaic-County, New Jersey |
| Surname | Monahan |
| Given Name | John Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | New Jersey |
| 1935 Residence (City) | Paterson |
| 1935 Residence (County) | Passaic |
| Additional Details | |
| Occupation | Bookkeeper |
| Industry | Bank |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1144 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
| Occupation | Bookkeeper |
| Township / Ward | Paterson |
| 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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| George Monahan | Son | — | 24 | ~1916 |
| John Monahan | Son | — | 25 | ~1915 |
| John Monahan | Head | — | 58 | ~1882 |
Census Appearances
1920
Hudson, New …
Son, age 4
Hudson, New Jersey · implied b. ~1916 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Monahan |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | New Jersey |
| Father's Birthplace | New Jersey |
| Mother's Birthplace | New Jersey |
| Occupation | none |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
1930
Hudson, New …
Son, age 15
Hudson, New Jersey · implied b. ~1915 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Monahan |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| 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
Passaic-County, New …
Son, age 25
Passaic-County, New Jersey · implied b. ~1915 — 3 household members
| Surname | Monahan |
| Given Name | John Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | New Jersey |
| 1935 Residence (City) | Paterson |
| 1935 Residence (County) | Passaic |
| Occupation | Bookkeeper |
| Industry | Bank |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1144 |
| 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 Monahan across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Edward Kerns (~0.92 confidence) and mother Margaret Kerns (~0.92 confidence) and mother Bridget Monahan (~0.92 confidence) and father John Monahan (~0.92 confidence) and father Frank Monahan (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Edward Kerns
b. ~1875
Source father
● Household
· direct · ~0.92
Mother
Margaret Kerns
b. ~1877
Source mother
● Household
· direct · ~0.92
Mother
Bridget Monahan
b. ~1882
Source mother
● Household
· direct · ~0.92
Father
John Monahan
b. ~1882
Source father
● Household
· direct · ~0.92
Father
Frank Monahan
b. ~1883
Source father
● Household
· direct · ~0.92
This person
Anchor record
John Monahan
Son · 1940 · age 25 · b. ~1915 · New Jersey
★ You are viewing this record
Sibling
George Monahan
Sibling · 1940 · age 24
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 — Passaic-County, New Jersey
Open full size
1940 US Federal Census — Passaic-County, New Jersey
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02433-00429)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | John Tarantino | 36 | Head | Laborer | Italy |
| 2 | Isabella Tarantino | 36 | Wife | — | New York |
| 3 | Carmen Tarantino | 13 | Son | — | New Jersey |
| 4 | Rose Tarantino | 10 | Daughter | — | New Jersey |
| 5 | Earl Gelineau | 30 | Head | Knitter | Massachusetts |
| 6 | Dominica Gelineau | 29 | Wife | Topper | New Jersey |
| 7 | John Monahan | 58 | Head | Plumber | New Jersey |
| 8 | John Jr. Monahan THIS PERSON | 25 | Son | Bookkeeper | New Jersey |
| 9 | George Monahan | 24 | Son | Bookkeeper | New Jersey |
| 10 | Joseph Maria | 36 | Head | Watchman | Italy |
| 11 | Sara Maria | 28 | Wife | — | Italy |
| 12 | Betty Maria | 11 | Daughter | — | New Jersey |
| 13 | Russell Maria | 8 | Son | — | New Jersey |
| 14 | Gloria Maria | 7 | Daughter | — | New Jersey |
| 15 | Frank Devana | 32 | Head | Truck Driver | New Jersey |
| 16 | Nellie Devana | 29 | Wife | Quill Winder | New Jersey |
| 17 | Frank Jr. Devana | 9 | Son | — | New Jersey |
| 18 | Deloris Devana | 7 | Daughter | — | New Jersey |
| 19 | Martin Kenney | 28 | Head | Bench Worker | New Jersey |
| 20 | Margaret Kenney | 25 | Wife | — | New Jersey |
| 21 | Martin Jr. Kenney | 4 | Son | — | New Jersey |
| 22 | Adeline Kenney | 1 | Daughter | — | New Jersey |
| 23 | William Ryan | 31 | Head | Painter | New Jersey |
| 24 | Mabel Ryan | 26 | Wife | — | New Jersey |
| 25 | Mabel R. Ryan | 0 | Daughter | — | New Jersey |
| 26 | John Finkle | 38 | Head | Proprietor | Pennsylvania |
| 27 | Edna Finkle | 26 | Wife | — | New Jersey |
| 28 | Mary Young | 52 | Head | — | New Jersey |
| 29 | Frank Young | 32 | Son | Saleslady | New Jersey |
| 30 | Beattie Young | 44 | Daughter | Winder | New Jersey |
| 31 | Charlie Kaa | 62 | Head | Proprietor | California |
| 32 | Christ. Muntruck | 55 | Head | Plumber | New York |
| 33 | Florence Muntruck | 21 | Wife | — | Kentucky |
| 34 | John Plumb | 29 | Head | Machinist | New Jersey |
| 35 | Ruth Plumb | 29 | Wife | — | New Jersey |
| 36 | Thomas Wurth | 31 | Head | Photo. Engrv. | Syria |
| 37 | Violet Wurth | 27 | Wife | — | Romania |
| 38 | Frank Zouma | 64 | Head | Shoe Maker | Italy |
| 39 | Fanny Zouma | 64 | Wife | — | Italy |
| 40 | Charles Zouma | 35 | Son | Weaver | 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)