WM
William Mccormick — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Suffolk, Massachusetts
Our Model Tree links this William Mccormick across the 1930 and 1940 US Censuses in Suffolk, Massachusetts (XGBoost, ~Confirmed) — first a son (b.~1914), then head of a 9-person household.
Age 16
b. ~1914
Male
Son
Born: Massachusetts
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Suffolk, Massachusetts |
| Surname | McCormick |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Irish Free State |
| Mother's Birthplace | Irish Free State |
| Additional Details | |
| Occupation | Operator |
| Industry | Wire factory |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Operator |
| Township / Ward | Boston 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.
9 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| John Mccormick | Son | — | 12 | ~1918 |
| George Mccormick | Son | — | 16 | ~1914 |
| James Mccormick | Son | — | 24 | ~1906 |
| Margaret Mccormick | Daughter | — | 14 | ~1916 |
| Mary Mccormick | Daughter | — | 25 | ~1905 |
| William Mccormick | Son | — | 16 | ~1914 |
| Thomas Mccormick | Son | — | 20 | ~1910 |
| Bridget Mccormick | Head | — | 49 | ~1881 |
| Agnes Mccormick | Daughter | — | 10 | ~1920 |
Census Appearances
1930
Suffolk, Massachusetts
Son, age 16
Suffolk, Massachusetts · implied b. ~1914 — 9 household members
| Surname | McCormick |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Irish Free State |
| Mother's Birthplace | Irish Free State |
| Occupation | Operator |
| Industry | Wire factory |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Suffolk-County, Massachusetts
Head, age 27
Suffolk-County, Massachusetts · implied b. ~1913 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McCormack |
| Given Name | William |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston City |
| 1935 Residence (County) | Suffolk |
| Occupation | Plumber |
| Industry | Plumbing |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 800 |
| Highest Grade | Hs 2 |
| 1935 Residence | Same house |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
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 Mccormick across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
William Mccormick
Son · 1930 · age 16 · b. ~1914 · Massachusetts
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Sibling
Agnes Mccormick
Sibling · 1930 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Mccormick
Sibling · 1930 · age 25
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
George Mccormick
Sibling · 1930 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas Mccormick
Sibling · 1930 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Mccormick
Sibling · 1930 · age 24
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Mccormick
Sibling · 1930 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Mccormick
Sibling · 1930 · age 12
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
1930 US Federal Census — Suffolk, Massachusetts
Open full size
1930 US Federal Census — Suffolk, Massachusetts
Page Contents
50 people indexed on this census page (ia:1930:massachusettscensus00reel951:0513)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Joseph Dowgiallo | 49 | Head | Sole Cutter | Poland |
| 2 | Mary Dowgiallo | 44 | Wife-H | — | Poland |
| 3 | Adelaide Dowgiallo | 19 | Daughter | Map Maker | Massachusetts |
| 4 | Teddy Dowgiallo | 17 | Son | — | Massachusetts |
| 5 | Josephine Dowgiallo | 15 | Daughter | — | New Hampshire |
| 6 | Edward Dowgiallo | 14 | Son | — | New Hampshire |
| 7 | Caroline Dowgiallo | 12 | Daughter | — | New Hampshire |
| 8 | Helen Dowgiallo | 10 | Daughter | — | New Hampshire |
| 9 | Patrick Fahey | 44 | Head | Truck Helper | Irish Free State |
| 10 | Ellen Fahey | 39 | Wife-H | — | Irish Free State |
| 11 | Stephen Fahey | 17 | Son | — | Massachusetts |
| 12 | Margaret Fahey | 16 | Daughter | — | Massachusetts |
| 13 | William Fahey | 15 | Son | — | Massachusetts |
| 14 | Patrick Fahey | 12 | Son | — | Massachusetts |
| 15 | James Fahey | 11 | Son | — | Massachusetts |
| 16 | Thomas Fahey | 9 | Son | — | Massachusetts |
| 17 | Catherine Fahey | 8 | Daughter | — | Massachusetts |
| 18 | Ellen Fahey | 4 | Daughter | — | Massachusetts |
| 19 | Bridget Mccormick | 49 | Head | — | Irish Free State |
| 20 | Mary Mccormick | 25 | Daughter | Operator | Massachusetts |
| 21 | James Mccormick | 24 | Son | Chauffeur | Massachusetts |
| 22 | Thomas Mccormick | 20 | Son | Clerk | Massachusetts |
| 23 | George Mccormick | 16 | Son | — | Massachusetts |
| 24 | William Mccormick THIS PERSON | 16 | Son | Operator | Massachusetts |
| 25 | Margaret Mccormick | 14 | Daughter | — | Massachusetts |
| 26 | John Mccormick | 12 | Son | — | Massachusetts |
| 27 | Agnes Mccormick | 10 | Daughter | — | Massachusetts |
| 28 | Andrew Bruyn | 36 | Head | Cashier | France |
| 29 | Margaret Bruyn | 33 | Wife-H | — | Massachusetts |
| 30 | M. Dorothy Bruyn | 13 | Daughter | — | Massachusetts |
| 31 | Andrew Bruyn | 11 | Son | — | Massachusetts |
| 32 | Charles Bruyn | 9 | Son | — | Massachusetts |
| 33 | Robert Bruyn | 8 | Son | — | Massachusetts |
| 34 | Muriel Bruyn | 6 | Daughter | — | Massachusetts |
| 35 | Theodore Bruyn | 4 | Son | — | Massachusetts |
| 36 | John E. Bruyn | 0 | Son | — | Massachusetts |
| 37 | John O'Toole | 40 | Head | General Work | Irish Free State |
| 38 | Sarah O'Toole | 37 | Wife-H | — | Massachusetts |
| 39 | Mary O'Toole | 12 | Daughter | — | Massachusetts |
| 40 | Norah O'Toole | 10 | Daughter | — | Massachusetts |
| 41 | John O'Toole | 8 | Son | — | Massachusetts |
| 42 | Patrick O'Toole | 7 | Son | — | Massachusetts |
| 43 | John F. Joyce | 44 | Head | Foreman | Massachusetts |
| 44 | Mary A. Joyce | 38 | Wife-H | — | Massachusetts |
| 45 | Marion Joyce | 20 | Daughter | — | Massachusetts |
| 46 | Catherine Joyce | 17 | Daughter | — | Massachusetts |
| 47 | Ernest Grimson | 43 | Head | Optician | Massachusetts |
| 48 | Mary Grimson | 44 | Wife-H | — | Massachusetts |
| 49 | Ernest Grimson | 15 | Son | — | Massachusetts |
| 50 | Arthur E. Grimson | 9 | Son | — | Massachusetts |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1930 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)