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James Mahoney — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Essex-County, New Jersey
Our Model Tree links this James Mahoney across the 1920, 1930 and 1940 US Censuses in Essex-County, New Jersey (XGBoost, ~Confirmed) — first a head (b.~1893), then head of a 9-person household.
Age 47
b. ~1893
Male
Head
Born: Ireland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Essex-County, New Jersey |
| Surname | Mahoney |
| Given Name | James |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 47 |
| Marital Status | Married |
| Birthplace | Ireland |
| 1935 Residence (City) | West Orange |
| 1935 Residence (County) | Essex |
| Naturalization Status | Naturalized |
| Additional Details | |
| Occupation | Engineer |
| Industry | Railroad |
| Class of Worker | PW |
| Hours Worked | 70 |
| Income (1939) | 2500 |
| Highest Grade | No 7 |
| 1935 Residence | Same place |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
| Occupation | Engineer |
| Township / Ward | West Orange |
| Est. Birth Year | ~1893 |
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.
9 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to James | Age | Birth yr |
|---|---|---|---|---|
| William Mahoney | Son | — | 15 | ~1925 |
| Robert Mahoney | Son | — | 1 | ~1939 |
| Irene Mahoney | Spouse | — | 47 | ~1893 |
| James Mahoney | Head | — | 47 | ~1893 |
| Daniel Mahoney | Son | — | 19 | ~1921 |
| Cornelius Mahoney | Son | — | 12 | ~1928 |
| James Mahoney | Son | — | 17 | ~1923 |
| Margaret Mahoney | Daughter | — | 5 | ~1935 |
| Irene Mahoney | Daughter | — | 11 | ~1929 |
Census Appearances
1920
New York, …
Other, age 25
New York, New York · implied b. ~1895 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mahoney |
| Given Name | James |
| Relationship to Head | brother in law |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Ireland |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Driver |
| Industry | Express |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Birth Country | Ireland |
| Year of Naturalization | 1919 |
| Birthplace (normalized) | ireland |
1930
New York, …
Other, age 37
New York, New York · implied b. ~1893 — 17 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mahony |
| Given Name | James |
| Relationship to Head | Lodger |
| Sex | M |
| Color / Race | White |
| Age | 37 |
| Marital Status | Single |
| Birthplace | Ireland |
| Naturalization Status | Naturalized |
| Year of Immigration | 1914 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Chauffeur |
| Industry | Private |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1940
Essex-County, New …
Head, age 47
Essex-County, New Jersey · implied b. ~1893 — 9 household members
| Surname | Mahoney |
| Given Name | James |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 47 |
| Marital Status | Married |
| Birthplace | Ireland |
| 1935 Residence (City) | West Orange |
| 1935 Residence (County) | Essex |
| Naturalization Status | Naturalized |
| Occupation | Engineer |
| Industry | Railroad |
| Class of Worker | PW |
| Hours Worked | 70 |
| Income (1939) | 2500 |
| Highest Grade | No 7 |
| 1935 Residence | Same place |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
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 Mahoney across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
James Mahoney
Head · 1940 · age 47 · b. ~1893 · 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 — Essex-County, New Jersey
Open full size
1940 US Federal Census — Essex-County, New Jersey
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02341-00655)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Emidio Vitale | 54 | Head | Laborer | Italy |
| 42 | Nellie Vitale | 41 | Wife | — | Italy |
| 43 | Paschal Vitale | 22 | Son | Operator | New Jersey |
| 44 | Robert Vitale | 18 | Son | Flyboy | New Jersey |
| 45 | Marion Vitale | 20 | Daughter | X | New Jersey |
| 46 | John Vitale | 13 | Son | — | New Jersey |
| 47 | Dolores Vitale | 6 | Daughter | — | New Jersey |
| 48 | James Mahoney THIS PERSON | 47 | Head | Engineer | Ireland |
| 49 | Irene Mahoney | 47 | Wife | — | Ireland |
| 50 | Daniel Mahoney | 19 | Son | — | New Jersey |
| 51 | James Mahoney | 17 | Son | — | New Jersey |
| 52 | William Mahoney | 15 | Son | — | New Jersey |
| 53 | Cornelius Mahoney | 12 | Son | — | New Jersey |
| 54 | Irene Mahoney | 11 | Daughter | — | New Jersey |
| 55 | Margaret Mahoney | 5 | Daughter | — | New Jersey |
| 56 | Robert Mahoney | 1 | Son | — | New Jersey |
| 57 | Bernard Broom | 37 | Head | Carpenter | Norway |
| 58 | Thoralda Broom | 31 | Wife | — | Norway |
| 59 | Alvin Broom | 4 | Son | — | New Jersey |
| 60 | Thomas Tunnell | 40 | Head | Operator | New Jersey |
| 61 | Ethel Tunnell | 34 | Wife | — | England |
| 62 | Thomas Tunnell | 14 | Son | — | New Jersey |
| 63 | (Ending Of Chestnut Beginning Of Franklin Ave) | None | — | — | — |
| 64 | Fred Tobias | 79 | Head | Meat & Grocery | Check |
| 65 | Cecilia Tobias | 74 | Wife | — | Check |
| 66 | Mortimer Tobias | 38 | Son | Meat & Grocery | New Jersey |
| 67 | Robert Renson | 8 | Grandson | — | New Jersey |
| 68 | Marion Renson | 37 | Daughter | — | New Jersey |
| 69 | Vito Rains | 67 | Head | Grocery Store | Italy |
| 70 | Philomena Rains | 65 | Wife | — | Italy |
| 71 | Phyllis Rains | 40 | Daughter | — | New Jersey |
| 72 | Peter Rains | 25 | Son | Laborer | New Jersey |
| 73 | Ruth Rains | 22 | Daughter | — | New Jersey |
| 74 | Philomena Rains | 5 | Grandchild | — | New Jersey |
| 75 | Hazel Smith | 37 | Head | — | New Jersey |
| 76 | George Smith | 19 | Son | Laborer | New Jersey |
| 77 | Robert Smith | 17 | Son | C.C.C. | New Jersey |
| 78 | Doris Smith | 15 | Daughter | — | New Jersey |
| 79 | Marion Smith | 13 | Daughter | — | New Jersey |
| 80 | David Smith | 12 | Son | — | New Jersey |
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)