WM
William Mcgrath — 1940 US Census Record
Linked across censuses1940 United States Federal Census · St.-Lawrence-County, New York
Our Model Tree links this William Mcgrath across the 1930 and 1940 US Censuses in St.-Lawrence-County, New York (XGBoost, ~Confirmed) — first a son (b.~1920), then head of a 8-person household.
Age 20
b. ~1920
Male
Son
Born: New York
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | St.-Lawrence-County, New York |
| Surname | McGrath |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | New York |
| 1935 Residence (City) | Massena Village |
| 1935 Residence (County) | St Lawrence |
| Additional Details | |
| Occupation | Helper in Remelt No 2 |
| Industry | Aluminum Plant |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 325 |
| Highest Grade | Hs 3 |
| 1935 Residence | Same House |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
| Occupation | Helper In Remelt No 2 |
| Township / Ward | Massena Village |
| Est. Birth Year | ~1920 |
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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| William Mcgrath | Son | — | 20 | ~1920 |
| Charles Mcgrath | Son | — | 16 | ~1924 |
| Patrick Mcgrath | Son | — | 17 | ~1923 |
| George Mcgrath | Son | — | 19 | ~1921 |
| Lillian Mcgrath | Daughter | — | 4 | ~1936 |
| John Mcgrath | Son | — | 11 | ~1929 |
| Lillian Mcgrath | Spouse | — | 47 | ~1893 |
| Patrick Mcgrath | Head | — | 47 | ~1893 |
Census Appearances
1930
St Lawrence, …
Son, age 10
St Lawrence, New York · implied b. ~1920 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McGrath |
| Given Name | William A |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | New York |
| Father's Birthplace | Canada English |
| Mother's Birthplace | Canada English |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
1940
St.-Lawrence-County, New …
Son, age 20
St.-Lawrence-County, New York · implied b. ~1920 — 8 household members
| Surname | McGrath |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | New York |
| 1935 Residence (City) | Massena Village |
| 1935 Residence (County) | St Lawrence |
| Occupation | Helper in Remelt No 2 |
| Industry | Aluminum Plant |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 325 |
| Highest Grade | Hs 3 |
| 1935 Residence | Same House |
| 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 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
William Mcgrath
Son · 1940 · age 20 · b. ~1920 · New York
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Sibling
John Mcgrath
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Patrick Mcgrath
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lillian Mcgrath
Sibling · 1940 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
George Mcgrath
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Charles 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 — St.-Lawrence-County, New York
Open full size
1940 US Federal Census — St.-Lawrence-County, New York
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02770-00197)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Charles Lucesh | 75 | Uncle | — | New York |
| 42 | William R Bain | 57 | Head | Foreman | Canada |
| 43 | Mary (X) Bain | 57 | Wife | — | Canada |
| 44 | William Mcguire | 55 | Head | Iron Worker | Vermont |
| 45 | Ella (X) Mcguire | 51 | Wife | — | New York |
| 46 | James Mcguire | 25 | Son | Asst To Foreman In Lab. | Vermont |
| 47 | Thomas Mcguire | 24 | Son | Shipper | Vermont |
| 48 | Daniel Mcguire | 20 | Son | Helper-Pot Service | New York |
| 49 | Charles Mcguire | 13 | Son | — | New York |
| 50 | Catherine Bennet | 13 | Niece | — | New York |
| 51 | Emel Cusseau | 37 | Head | Labor In Rolling Mill | Canada |
| 52 | Rose (X) Cusseau | 46 | Wife | — | New York |
| 53 | Roy (X) Sharp | 25 | Head | Taping Iron Rods | New York |
| 54 | Gertrude Sharp | 22 | Wife | — | New York |
| 55 | Charles Clement | 32 | Head | Policeman | Canada |
| 56 | Aurora (X) Clement | 37 | Wife | — | Canada |
| 57 | Irene M Clement | 18 | Daughter | — | New York |
| 58 | Howard E Clement | 16 | Son | — | New York |
| 59 | Charles W Clement | 14 | Son | — | New York |
| 60 | Verna K Clement | 13 | Daughter | — | New York |
| 61 | Shirley W Clement | 9 | Daughter | — | New York |
| 62 | Carroll Alguire | 42 | Head | Mechanic | Canada |
| 63 | Marguerite Alguire | 41 | Wife | — | Canada |
| 64 | Ronald Alguire | 10 | Son | — | New York |
| 65 | Marilyn Alguire | 8 | Daughter | — | New York |
| 66 | Arthur Delly | 38 | Son-in-law | Roll Dept. | Canada |
| 67 | William Mackinnon | 44 | Head | Mechanic In Shop | Canada |
| 68 | Hazel Mackinnon | 30 | Wife | — | Canada |
| 69 | Clarke Mackinnon | 8 | Son | — | New York |
| 70 | Edward Bora | 55 | Head | Pot Liner | New York |
| 71 | Louise (X) Bora | 44 | Wife | — | New York |
| 72 | George Fresno | 32 | Lodger | Remelting | New York |
| 73 | Patrick Mcgrath | 47 | Head | Electrician | Canada |
| 74 | Lillian (X) Mcgrath | 47 | Wife | — | Canada |
| 75 | William Mcgrath THIS PERSON | 20 | Son | Helper In Remelt No 2 | New York |
| 76 | George Mcgrath | 19 | Son | — | New York |
| 77 | Patrick Mcgrath | 17 | Son | — | New York |
| 78 | Charles Mcgrath | 16 | Son | — | New York |
| 79 | Lillian Mcgrath | 4 | Daughter | — | New York |
| 80 | John Mcgrath | 11 | Son | — | New York |
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)