JM
James Mcgrath — 1940 US Census Record
Model Tree available1940 United States Federal Census · Kings-County, New York
Our Model Tree links this James Mcgrath across the 1920, 1930 and 1940 US Censuses in Kings-County, New York (XGBoost, ~Confirmed), with identified parents James & James — first a son (b.~1917), then head of a 6-person household.
Age 23
b. ~1917
Male
Son
Born: New York
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Kings-County, New York |
| Surname | McGrath |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | New York |
| 1935 Residence (City) | NYC |
| 1935 Residence (County) | Kings |
| Additional Details | |
| Occupation | Plumber's Helper |
| Industry | Building Construction |
| Class of Worker | PW |
| Hours Worked | 45 |
| Income (1939) | 800 |
| Highest Grade | C-2 |
| 1935 Residence | Same place |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
| Occupation | Plumber'S Helper |
| Township / Ward | Nyc |
| 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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to James | Age | Birth yr |
|---|---|---|---|---|
| Virginia Mcgrath | Daughter | — | 17 | ~1923 |
| Margaret Mcgrath | Daughter | — | 16 | ~1924 |
| James Mcgrath | Head | — | 53 | ~1887 |
| James Mcgrath | Son | — | 23 | ~1917 |
| John Mcgrath | Son | — | 20 | ~1920 |
| Sarah Mcgrath | Spouse | — | 49 | ~1891 |
Census Appearances
1920
Kings, New …
Son, age 2
Kings, New York · implied b. ~1918 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McGrath |
| Given Name | James H. |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | New York |
| Father's Birthplace | New York |
| Mother's Birthplace | New York |
| Occupation | none |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
1930
Kings, New …
Son, age 12
Kings, New York · implied b. ~1918 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McGrath |
| Given Name | James H. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | New York |
| Father's Birthplace | New York |
| Mother's Birthplace | New York |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
1940
Kings-County, New …
Son, age 23
Kings-County, New York · implied b. ~1917 — 6 household members
| Surname | McGrath |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | New York |
| 1935 Residence (City) | NYC |
| 1935 Residence (County) | Kings |
| Occupation | Plumber's Helper |
| Industry | Building Construction |
| Class of Worker | PW |
| Hours Worked | 45 |
| Income (1939) | 800 |
| Highest Grade | C-2 |
| 1935 Residence | Same place |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
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: father James Mcgrath (~0.92 confidence) and father James Mcgrath (~0.92 confidence) and father James Mcgrath (~0.92 confidence) and mother Sarah Mcgrath (~0.92 confidence) and mother Isabelle Mcgrath (~0.92 confidence) and mother Mabel Mcgrath (~0.92 confidence). The pedigree spans 1 generation with 6 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
James Mcgrath
b. ~1887
Source father
● Household
· direct · ~0.92
Father
James Mcgrath
b. ~1888
Source father
● Household
· direct · ~0.92
Father
James Mcgrath
b. ~1889
Source father
● Household
· direct · ~0.92
Mother
Sarah Mcgrath
b. ~1891
Source mother
● Household
· direct · ~0.92
Mother
Isabelle Mcgrath
b. ~1892
Source mother
● Household
· direct · ~0.92
Mother
Mabel Mcgrath
b. ~1892
Source mother
● Household
· direct · ~0.92
This person
Anchor record
James Mcgrath
Son · 1940 · age 23 · b. ~1917 · New York
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Sibling
Margaret Mcgrath
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Mcgrath
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Virginia Mcgrath
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 — Kings-County, New York
Open full size
1940 US Federal Census — Kings-County, New York
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02590-00054)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | James Robertson | 57 | Head | Carpenter | Scotland |
| 42 | Elizabeth Ann Robertson | 56 | Wife | — | Scotland |
| 43 | Mona Robertson | 30 | Daughter | Bookkeeper | Scotland |
| 44 | Anna Erreborn | 64 | Head | — | Ireland |
| 45 | Elizabeth Erreborn | 37 | Daughter | Stenographer | New York |
| 46 | John Erreborn | 35 | Son | Clerk | New York |
| 47 | Walter Erreborn | 27 | Son | Auditor | New York |
| 48 | Sylvia Erreborn | 25 | Daughter | Secretary | New York |
| 49 | James Mcgrath | 53 | Head | Plumber | New York |
| 50 | Sarah Mcgrath | 49 | Wife | — | Northumberland |
| 51 | James Mcgrath THIS PERSON | 23 | Son | Plumber'S Helper | New York |
| 52 | John Mcgrath | 20 | Son | Plumber'S Helper | New York |
| 53 | Virginia Mcgrath | 17 | Daughter | — | New York |
| 54 | Margaret Mcgrath | 16 | Daughter | — | New York |
| 55 | Frank Magri | 61 | Head | — | Italy |
| 56 | Amata Magri | 28 | Daughter | Artificial Flower Maker | New York |
| 57 | Amelia Magri | 23 | Daughter | Seamstress | Connecticut |
| 58 | Leonello Magri | 7 | Son | — | New York |
| 59 | Rocco Montesano | 47 | Head | Painter | Italy |
| 60 | Mary Montesano | 45 | Wife | — | Italy |
| 61 | Joseph Montesano | 19 | Son | Dispatcher | New York |
| 62 | Angelina Montesano | 18 | Daughter | — | New York |
| 63 | Rosalie Montesano | 14 | Daughter | — | New York |
| 64 | Marie Montesano | 12 | Daughter | — | New York |
| 65 | David Cotrone | 60 | Head | Shoemaker | Italy |
| 66 | Rose Cotrone | 50 | Wife | — | Italy |
| 67 | Adelle Cotrone | 32 | Son | Chauffeur | New York |
| 68 | Ercole Cotrone | 29 | Son | Chauffeur | New York |
| 69 | Adeline Cotrone | 27 | Daughter | Salesgirl | New York |
| 70 | Julia Cotrone | 22 | Daughter | — | New York |
| 71 | Saverio Cotrone | 20 | Son | Automobile Mechanic | New York |
| 72 | Frank Cascarelli | 57 | Head | Tailor | Italy |
| 73 | Achille Cascarelli | 24 | Son | Chauffeur | New York |
| 74 | Frank Jr. Cascarelli | 21 | Son | Electrician | New York |
| 75 | Angelina Alvino | 70 | Head | — | Italy |
| 76 | Anthony Alvino | 30 | Son | Pharmacist | New York |
| 77 | Anna Alvino | 25 | Daughter | Applique Embroiderer | New York |
| 78 | Rosario Alvino | 45 | Son | Furniture Finisher | Italy |
| 79 | Stanley Kriticosoulos | 29 | Roomer | Counterman | Egypt |
| 80 | Antoinette Kriticosoulos | 25 | Daughter | — | New York |
Related Census Records
Pedigree Summary
James + 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)