JM
James Mcgrath — 1940 US Census Record
Model Tree available1940 United States Federal Census · Hudson-County, New Jersey
Our Model Tree links this James Mcgrath across the 1920, 1930 and 1940 US Censuses in Hudson-County, New Jersey (XGBoost, ~Confirmed), with identified parents Nora & Mary — first a son (b.~1917), then head of a 5-person household.
Age 23
b. ~1917
Male
Son
Born: New Jersey
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Hudson-County, New Jersey |
| Surname | McGrath |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | New Jersey |
| 1935 Residence (City) | Jersey City |
| 1935 Residence (County) | Hudson |
| Additional Details | |
| Occupation | Plumbers Helper |
| Industry | Plumber |
| Class of Worker | PW |
| Hours Worked | 3 |
| Income (1939) | 54 |
| Highest Grade | H 2 |
| 1935 Residence | Same place |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
| Occupation | Plumbers Helper |
| Township / Ward | Jersey City |
| Est. Birth Year | ~1917 |
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 James | Age | Birth yr |
|---|---|---|---|---|
| Margaret Mcgrath | Daughter | — | 25 | ~1915 |
| Mary Mcgrath | Daughter | — | 27 | ~1913 |
| Nora Mcgrath | Head | — | 58 | ~1882 |
| Terrence Mcgrath | Son | — | 22 | ~1918 |
| James Mcgrath | Son | — | 23 | ~1917 |
Census Appearances
1920
Hudson, New …
Son, age 2
Hudson, New Jersey · implied b. ~1918 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McGrath |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | New Jersey |
| Father's Birthplace | New Jersey |
| Mother's Birthplace | New Jersey |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
1930
Hudson, New …
Son, age 13
Hudson, New Jersey · implied b. ~1917 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McGrath |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| 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
Hudson-County, New …
Son, age 23
Hudson-County, New Jersey · implied b. ~1917 — 5 household members
| Surname | McGrath |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | New Jersey |
| 1935 Residence (City) | Jersey City |
| 1935 Residence (County) | Hudson |
| Occupation | Plumbers Helper |
| Industry | Plumber |
| Class of Worker | PW |
| Hours Worked | 3 |
| Income (1939) | 54 |
| Highest Grade | H 2 |
| 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 James Mcgrath across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Nora Mcgrath (~0.92 confidence) and mother Mary Mcgrath (~0.92 confidence) and father James Mcgrath (~0.92 confidence) and father James Mcgrath (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Nora Mcgrath
b. ~1882
Source mother
● Household
· direct · ~0.92
Mother
Mary Mcgrath
b. ~1896
Source mother
● Household
· direct · ~0.92
Father
James Mcgrath
b. ~1897
Source father
● Household
· direct · ~0.92
Father
James Mcgrath
b. ~1897
Source father
● Household
· direct · ~0.92
This person
Anchor record
James Mcgrath
Son · 1940 · age 23 · b. ~1917 · New Jersey
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Sibling
Margaret Mcgrath
Sibling · 1940 · age 25
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Mcgrath
Sibling · 1940 · age 27
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Terrence Mcgrath
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 — 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-t0627-02409-00644)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Thomas Goldrick | 75 | Father | — | Eire |
| 42 | Nora Mcgrath | 58 | Head | — | Eire |
| 43 | Mary Mcgrath | 27 | Daughter | Typist | New Jersey |
| 44 | Margaret Mcgrath | 25 | Daughter | Steno. | New Jersey |
| 45 | James Mcgrath THIS PERSON | 23 | Son | Plumbers Helper | New Jersey |
| 46 | Terrence Mcgrath | 22 | Son | Machinist | New Jersey |
| 47 | John Mcgrath | 26 | Head | Bldg. Insp. | New Jersey |
| 48 | Genevieve Mcgrath | 27 | Wife | — | New York |
| 49 | John Mcgrath | 2 | Son | — | New Jersey |
| 50 | Patricia Mcgrath | 0 | Daughter | — | New Jersey |
| 51 | Robert Stevenson | 35 | Head | Cooper | Washington DC |
| 52 | Mary Stevenson | 35 | Wife | — | New York |
| 53 | Agnes Stevenson | 14 | Daughter | — | New Jersey |
| 54 | Margaret Stevenson | 12 | Daughter | — | New Jersey |
| 55 | Catherine Atchison | 39 | Head | — | New York |
| 56 | William Atchison | 18 | Son | New Worker | New Jersey |
| 57 | Catherine Atchison | 15 | Daughter | — | New Jersey |
| 58 | Joseph Atchison | 13 | Son | — | New Jersey |
| 59 | Mary Atchison | 11 | Daughter | — | New Jersey |
| 60 | Dorothy Atchison | 8 | Daughter | — | New Jersey |
| 61 | Alex Wasilewski | 56 | Head | Repair Man | Poland |
| 62 | Enelia Wasilewski | 48 | Wife | — | Poland |
| 63 | Stephanie Wasilewski | 25 | Daughter | Typist | New Jersey |
| 64 | Alfred Wasilewski | 18 | Son | — | New Jersey |
| 65 | Vincent Wasilewski | 16 | Son | — | New Jersey |
| 66 | Peter Wasilewski | 21 | Son | Laborer | New Jersey |
| 67 | Henry Main | 74 | Head | — | New Jersey |
| 68 | Susan Main | 68 | Wife | — | New Jersey |
| 69 | Isabel Parsons | 79 | Head | — | Newfoundland |
| 70 | Elizabeth Parsons | 71 | Wife | — | English Canada |
| 71 | Harold Parsons | 43 | Son | — | English Canada |
| 72 | Walter Parsons | 39 | Son | Carpenter | English Canada |
| 73 | Frank Parsons | 37 | Son | Brick Layer | English Canada |
| 74 | Myrtle Parsons | 36 | Daughter | — | Montreal |
| 75 | Clarence Parsons | 33 | Son | Plumbers Helper | New Jersey |
| 76 | George Parsons | 31 | Son | Bookkeeper | New Jersey |
| 77 | Herbert Parsons | 28 | Son | Printers Helper | New Jersey |
| 78 | Frank Smith | 62 | Head | Realtor | New Jersey |
| 79 | Elizabeth Smith | 60 | Wife | — | English Canada |
| 80 | Frank Smith | 22 | Son | Realtor | New Jersey |
Pedigree Summary
James + 3 siblings
Gen 1 · 4 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)