WM
William Mccarthy — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Suffolk, Massachusetts
Our Model Tree links this William Mccarthy across the 1930 and 1940 US Censuses in Suffolk, Massachusetts (XGBoost, ~Confirmed) — first a son (b.~1917), then head of a 12-person household.
Age 13
b. ~1917
Male
Son
Born: Massachusetts
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Suffolk, Massachusetts |
| Surname | McCarthy |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Rhode Island |
| Mother's Birthplace | Irish Free State |
| Additional Details | |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | Boston 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.
12 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| Mary Mccarthy | Daughter | — | 5 | ~1925 |
| Catherine Mccarthy | Daughter | — | 14 | ~1916 |
| Bernadine Mccarthy | Daughter | — | 7 | ~1923 |
| Thomas Mccarthy | Head | — | 39 | ~1891 |
| Honor Mccarthy | Other | — | 40 | ~1890 |
| Joseph Daley | Other | — | 25 | ~1905 |
| Stephen Mccarthy | Other | — | 34 | ~1896 |
| John Mccarthy | Other | — | 27 | ~1903 |
| Thomas Mccarthy | Son | — | 15 | ~1915 |
| William Mccarthy | Son | — | 13 | ~1917 |
| John Mccarthy | Son | — | 9 | ~1921 |
| Bernard Mccarthy | Son | — | 10 | ~1920 |
Census Appearances
1930
Suffolk, Massachusetts
Son, age 13
Suffolk, Massachusetts · implied b. ~1917 — 12 household members
| Surname | McCarthy |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Rhode Island |
| Mother's Birthplace | Irish Free State |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
Son, age 23
Suffolk-County, Massachusetts · implied b. ~1917 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McCarty |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston City |
| 1935 Residence (County) | Suffolk |
| Occupation | Shipper |
| Industry | Rubber Co |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1154 |
| Highest Grade | H 3 |
| 1935 Residence | Same place |
| 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 Mccarthy across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
William Mccarthy
Son · 1930 · age 13 · b. ~1917 · Massachusetts
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Sibling
Mary Mccarthy
Sibling · 1930 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas Mccarthy
Sibling · 1930 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Mccarthy
Sibling · 1930 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Catherine Mccarthy
Sibling · 1930 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Bernadine Mccarthy
Sibling · 1930 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Bernard Mccarthy
Sibling · 1930 · age 10
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
48 people indexed on this census page (ia:1930:massachusettscensus00reel959:0326)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Elizabeth Wardala | 27 | Wife-H | — | Massachusetts |
| 2 | Joseph J. Callaghan | 46 | Head | Cashier | Massachusetts |
| 3 | Mary Callaghan | 46 | Wife-H | Foreman Printer | Canada-English |
| 4 | Marguerite E. Callaghan | 19 | Daughter | None | Massachusetts |
| 5 | Violet Moore | 27 | Boarder | Artist | Canada-English |
| 6 | Robert Heidley | 43 | Head | Salesman | Massachusetts |
| 7 | Annie Heidley | 44 | Wife-H | None | Massachusetts |
| 8 | Ruth Heidley | 14 | Daughter | None | Massachusetts |
| 9 | Robert Heidley | 13 | Son | None | Massachusetts |
| 10 | John J. Keenan | 50 | Head | Golf Instructor | Irish Free State |
| 11 | Elizabeth Keenan | 49 | Wife-H | None | Massachusetts |
| 12 | Katherine Keenan | 22 | Daughter | Clerk | Rhode Island |
| 13 | Margaret B. Thomas | 58 | Head-H | None | Canada-English |
| 14 | Mary Thomas | 23 | Daughter | Waitress | Maine |
| 15 | Florence Thomas | 22 | Daughter | Hairdresser | Massachusetts |
| 16 | Theresa Thomas | 19 | Daughter | Waitress | Massachusetts |
| 17 | Margaret Thomas | 16 | Daughter | None | Massachusetts |
| 18 | Alice Thomas | 12 | Daughter | None | Massachusetts |
| 19 | John Noonan | 57 | Head | Sub-Foreman | Irish Free State |
| 20 | Mary J. Noonan | 48 | Wife-H | None | Irish Free State |
| 21 | Stanley Laird | 46 | Head | Worker | Poland |
| 22 | Julia Laird | 44 | Wife-H | None | Poland |
| 23 | Charles Laird | 21 | Son | Sailor | Massachusetts |
| 24 | John Laird | 19 | Son | Clerk | Massachusetts |
| 25 | Walter Laird | 6 | Son | None | Massachusetts |
| 26 | Stanley Laird | 9 | Son | None | Massachusetts |
| 27 | Thomas B. Mccarthy | 39 | Head | Trainmaster | Rhode Island |
| 28 | Honor Mccarthy | 40 | Wife-H | None | Irish Free State |
| 29 | Thomas Mccarthy | 15 | Son | None | Massachusetts |
| 30 | Catherine Mccarthy | 14 | Daughter | None | Massachusetts |
| 31 | William Mccarthy THIS PERSON | 13 | Son | None | Massachusetts |
| 32 | Bernard Mccarthy | 10 | Son | None | Massachusetts |
| 33 | John Mccarthy | 9 | Son | None | Massachusetts |
| 34 | Bernadine Mccarthy | 7 | Daughter | None | Massachusetts |
| 35 | Mary Mccarthy | 5 | Daughter | None | Massachusetts |
| 36 | John Mccarthy | 27 | Brother | Expressman | Massachusetts |
| 37 | Stephen Mccarthy | 34 | Brother | None | Massachusetts |
| 38 | Joseph Daley | 25 | Boarder | Laborer | Irish Free State |
| 39 | Charles J. Crowley | 57 | Head | Manager | Irish Free State |
| 40 | Mary A. Crowley | 46 | Wife-H | None | Massachusetts |
| 41 | Charles Crowley | 20 | Son | None | Massachusetts |
| 42 | Jeremiah Crowley | 18 | Son | None | Massachusetts |
| 43 | Anne Crowley | 17 | Daughter | None | Massachusetts |
| 44 | William Crowley | 15 | Son | None | Massachusetts |
| 45 | Paul Crowley | 9 | Son | None | Massachusetts |
| 46 | Mary Sullivan | 22 | Servant | Servant | Irish Free State |
| 47 | Charles O'Donnell | 39 | Head | Druggist | New Hampshire |
| 48 | Helen O'Donnell | 30 | Wife-H | None | Massachusetts |
Related Census Records
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)