WM
William Mccarthy — 1900 US Census Record
Linked across censuses1900 United States Federal Census · Middlesex, Massachusetts
Our Model Tree links this William Mccarthy across the 1900 and 1910 US Censuses in Middlesex, Massachusetts (XGBoost, ~Confirmed) — first a son (b.~1888), then head of a 9-person household.
Age 12
b. ~1888
Male
Son
Born: Massachusetts
Single
1900 Census Record Details
| Census Year | 1900 |
| Location | Middlesex, Massachusetts |
| Surname | McCarthy |
| Given Name | William H. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Birth Month | Dec |
| Birth Year | 1888 |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Additional Details | |
| Occupation | At School |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | At School |
| Township / Ward | Malden City |
| Est. Birth Year | ~1888 |
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 1900 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| Mabel Mccarthy | Daughter | — | 8 | ~1892 |
| Lara Mccarthy | Daughter | — | 5 | ~1895 |
| Marion Mccarthy | Daughter | — | 3 | ~1897 |
| William Mccarthy | Head | — | 33 | ~1867 |
| Warren Mccarthy | Son | — | 1 | ~1899 |
| William Mccarthy | Son | — | 12 | ~1888 |
| Rupert Mccarthy | Son | — | 11 | ~1889 |
| Lloyd Mccarthy | Son | — | 6 | ~1894 |
| Lucie Mccarthy | Spouse | — | 32 | ~1868 |
Census Appearances
1900
Middlesex, Massachusetts
Son, age 12
Middlesex, Massachusetts · implied b. ~1888 — 9 household members
| Surname | McCarthy |
| Given Name | William H. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Birth Month | Dec |
| Birth Year | 1888 |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Occupation | At School |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1910
Middlesex, Massachusetts
Son, age 21
Middlesex, Massachusetts · implied b. ~1889 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mc Carthy |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | English |
| 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 (1900 and 1910) in Middlesex, Massachusetts, using XGBoost record linkage.
Show:
This person
Anchor record
William Mccarthy
Son · 1900 · age 12 · b. ~1888 · Massachusetts
★ You are viewing this record
Sibling
Rupert Mccarthy
Sibling · 1900 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mabel Mccarthy
Sibling · 1900 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lloyd Mccarthy
Sibling · 1900 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Warren Mccarthy
Sibling · 1900 · age 1
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lara Mccarthy
Sibling · 1900 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Marion Mccarthy
Sibling · 1900 · age 3
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
1900 US Federal Census — Middlesex, Massachusetts
Open full size
1900 US Federal Census — Middlesex, Massachusetts
Page Contents
50 people indexed on this census page (ia:1900:12thcensusofpopu662unit:0541)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Spaulding | 0 | Daughter | — | Massachusetts |
| 2 | Harry Reese | 59 | Head | Clerk | Maine |
| 3 | Ella R. Reese | 53 | Wife | — | Pennsylvania |
| 4 | James Augustus | 67 | Head | Machinist | England |
| 5 | Emma A. Augustus | 65 | Wife | — | England |
| 6 | William J. Augustus | 42 | Son | Book Keeper | Maryland |
| 7 | George Augustus | 38 | Son | Machinist | Massachusetts |
| 8 | Elizabeth A. Augustus | 33 | Daughter | — | Massachusetts |
| 9 | Lucy E. Robbins | 57 | Head | — | Maine |
| 10 | Mary H. Robbins | 31 | Daughter | Book Keeper | Massachusetts |
| 11 | Margaret Fowler | 59 | Head | — | Maine |
| 12 | Jennie O. L. Fowler | 31 | Daughter | Book Keeper | Massachusetts |
| 13 | William H. Farquhar | 31 | Boarder | Travelling Salesman | Scotland |
| 14 | Josephine W. Laskey | 46 | Head | Painter Shop | Maryland |
| 15 | Ellie Laskey | 39 | Wife | Dressmaker | Ireland |
| 16 | Edward Laskey | 15 | Son | At School | Massachusetts |
| 17 | Adelaide Laskey | 9 | Daughter | At School | Massachusetts |
| 18 | Annie Fisher | 18 | Boarder | — | Canada |
| 19 | William A. Mccarthy | 32 | Head | Motorman St. Rr | Massachusetts |
| 20 | Lucie Mccarthy | 31 | Wife | — | Massachusetts |
| 21 | William H. Mccarthy THIS PERSON | 11 | Son | At School | Massachusetts |
| 22 | Rupert E. Mccarthy | 10 | Son | At School | Massachusetts |
| 23 | Mabel A. Mccarthy | 7 | Daughter | At School | Massachusetts |
| 24 | Lloyd L. Mccarthy | 5 | Son | At School | Massachusetts |
| 25 | Lara E. Mccarthy | 5 | Daughter | At School | Massachusetts |
| 26 | Marion Mccarthy | 3 | Daughter | — | Massachusetts |
| 27 | Warren Mccarthy | 1 | Son | — | Massachusetts |
| 28 | William T. Blair | 60 | Head | Whitener | Virginia |
| 29 | Georgeanna Blair | 54 | Wife | — | Connecticut |
| 30 | Edward T. Blair | 27 | Son | Clerk | Massachusetts |
| 31 | Walter Blair | 23 | Son | Janitor | Massachusetts |
| 32 | William H. Fowler | 57 | Head | Cook | Virginia |
| 33 | Matilda J. Fowler | 50 | Wife | — | Canada |
| 34 | Annabell Bell | 8 | Boarder | — | Massachusetts |
| 35 | Lillian Green | 6 | Boarder | — | Massachusetts |
| 36 | Mamie Green | 4 | Boarder | — | Massachusetts |
| 37 | Frank S. Mallory | 29 | Head | Coachman | North Carolina |
| 38 | Mary H. Mallory | 35 | Wife | — | New Hampshire |
| 39 | Luciana Mallory | 6 | Daughter | — | New Hampshire |
| 40 | Frank H. Lee | 38 | Boarder | Clerk | Massachusetts |
| 41 | Frank H. Lee | 13 | Boarder | At School | Massachusetts |
| 42 | Robert W. Moran | 52 | Head | Engineer Stationary | Canada |
| 43 | Margaret Moran | 42 | Wife | — | Canada |
| 44 | Annie E. Brown | 34 | Boarder | Vest Maker | Canada |
| 45 | Edward T. Rowley | 70 | Head | Real Estate | Maine |
| 46 | Laura Rowley | 68 | Wife | — | Maine |
| 47 | Maria Rowley | 40 | Daughter | — | Maine |
| 48 | Martin H. Hathaway | 48 | Head | Milk Dealer | England |
| 49 | Mary H. Hathaway | 37 | Wife | — | England |
| 50 | Richard V. Hathaway | 17 | Son | — | England |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1900 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)