WM
William Mcgrath — 1940 US Census Record
Model Tree available1940 United States Federal Census · Kings-County, New York
Our Model Tree links this William Mcgrath across the 1920, 1930 and 1940 US Censuses in Kings-County, New York (XGBoost, ~Confirmed), with identified parents Frank & Patrick — first a son (b.~1914), then head of a 7-person household.
Age 26
b. ~1914
Male
Son
Born: New York
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Kings-County, New York |
| Surname | McGrath |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 26 |
| Marital Status | Single |
| Birthplace | New York |
| 1935 Residence (City) | New York City |
| 1935 Residence (County) | Kings |
| Additional Details | |
| Occupation | Porter |
| Industry | Subway |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 750 |
| Highest Grade | 8 |
| 1935 Residence | Same place |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
| Occupation | Porter |
| Township / Ward | New York City |
| Est. Birth Year | ~1914 |
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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| William Mcgrath | Son | — | 26 | ~1914 |
| Joseph Mcgrath | Son | — | 16 | ~1924 |
| Patrick Mcgrath | Son | — | 28 | ~1912 |
| Catherine Mcgrath | Spouse | — | 57 | ~1883 |
| Catherine Mcgrath | Daughter | — | 20 | ~1920 |
| Patrick Mcgrath | Head | — | 68 | ~1872 |
| John Mcgrath | Son | — | 17 | ~1923 |
Census Appearances
1920
Kings, New …
Son, age 5
Kings, New York · implied b. ~1915 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McGrath |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 5 |
| 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 |
1930
Kings, New …
Son, age 16
Kings, New York · implied b. ~1914 — 13 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McGrath |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | New York |
| Father's Birthplace | New York |
| Mother's Birthplace | New York |
| Occupation | Operator |
| Industry | Laundry |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
1940
Kings-County, New …
Son, age 26
Kings-County, New York · implied b. ~1914 — 7 household members
| Surname | McGrath |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 26 |
| Marital Status | Single |
| Birthplace | New York |
| 1935 Residence (City) | New York City |
| 1935 Residence (County) | Kings |
| Occupation | Porter |
| Industry | Subway |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 750 |
| Highest Grade | 8 |
| 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 William Mcgrath across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Frank Mcgrath (~0.92 confidence) and father Patrick Mcgrath (~0.92 confidence) and father William Mcgrath (~0.92 confidence) and mother Catherine Mcgrath (~0.92 confidence) and mother Martha Mcgrath (~0.92 confidence) and mother Sarah Mcgrath (~0.92 confidence). The pedigree spans 1 generation with 6 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Frank Mcgrath
b. ~1880
Source father
● Household
· direct · ~0.92
Father
Patrick Mcgrath
b. ~1872
Source father
● Household
· direct · ~0.92
Father
William Mcgrath
b. ~1880
Source father
● Household
· direct · ~0.92
Mother
Catherine Mcgrath
b. ~1883
Source mother
● Household
· direct · ~0.92
Mother
Martha Mcgrath
b. ~1890
Source mother
● Household
· direct · ~0.92
Mother
Sarah Mcgrath
b. ~1881
Source mother
● Household
· direct · ~0.92
This person
Anchor record
William Mcgrath
Son · 1940 · age 26 · b. ~1914 · New York
★ You are viewing this record
Sibling
John Mcgrath
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Catherine Mcgrath
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Patrick Mcgrath
Sibling · 1940 · age 28
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joseph Mcgrath
Sibling · 1940 · age 16
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-t0627-02568-00870)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Jack Clark | 36 | Head | Truck Driver | New York |
| 42 | Rosie Clark | 41 | Wife | — | New York |
| 43 | Howard Clark | 13 | Son | — | New York |
| 44 | Leonard Clark | 6 | Son | — | New York |
| 45 | Patrick Mcgrath | 68 | Head | Porter | Ireland |
| 46 | Catherine Mcgrath | 57 | Wife | — | Ireland |
| 47 | Patrick Mcgrath | 28 | Son | Truck Driver | New York |
| 48 | William Mcgrath THIS PERSON | 26 | Son | Porter | New York |
| 49 | Catherine Mcgrath | 20 | Daughter | Nurse | New Jersey |
| 50 | John Mcgrath | 17 | Son | New Worker | New York |
| 51 | Joseph Mcgrath | 16 | Son | — | New York |
| 52 | Robert Braemler | 63 | Head | Starter | Germany |
| 53 | Anna Braemler | 63 | Wife | — | New York |
| 54 | John Hettick | 50 | Head | Engineer | New York |
| 55 | Elizabeth Hettick | 46 | Wife | — | New York |
| 56 | John Hettick | 21 | Son | New Worker | New York |
| 57 | Patrick Maloney | 32 | Head | Helper | Ireland |
| 58 | Joan Maloney | 30 | Wife | — | Ireland |
| 59 | Florence Wallington | 63 | Head | — | New York |
| 60 | Earl Wallington | 31 | Son | Clerk | New York |
| 61 | Louise Hofman | 36 | Daughter | Cashier | New York |
| 62 | Joseph Litchfield | 84 | Head | Tailor | Germany |
| 63 | Margaret Litchfield | 51 | Daughter | — | New York |
| 64 | Walter Ferris | 36 | Head | Roofer | New York |
| 65 | Helen Ferris | 35 | Wife | — | New York |
| 66 | Ray Marie Ferris | 14 | Daughter | — | New York |
| 67 | Charles Ferris | 13 | Son | — | New York |
| 68 | Walter Jr Ferris | 6 | Son | — | New York |
| 69 | Nellie Collins | 82 | Grand Mother | — | New York |
| 70 | Michael Duffy | 67 | Head | Watchman | Ireland |
| 71 | Agnes Duffy | 75 | Wife | — | Ireland |
| 72 | Erasmo Esposito | 58 | Head | Dock Worker | Italy |
| 73 | Teresa Esposito | 54 | Wife | — | Italy |
| 74 | Philomena Esposito | 22 | Daughter | Operator | New York |
| 75 | Clara Esposito | 20 | Daughter | Operator | New York |
| 76 | Frank Scotto | 27 | Son in law | Dock Worker | New York |
| 77 | Giuseppi Salamoni | 53 | Cousin | Musician | Italy |
| 78 | Maurizio Leme | 47 | Head | Dock Worker | Italy |
| 79 | Clara Leme | 47 | Wife | — | Italy |
| 80 | Alfred Merolla | 76 | Cousin | Waiter | Italy |
Pedigree Summary
William + 4 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)