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Mary Leahy — 1910 US Census Record
Linked across censuses1910 United States Federal Census · Middlesex, Massachusetts
Our Model Tree links this Mary Leahy across the 1900 and 1910 US Censuses in Middlesex, Massachusetts (XGBoost, ~Confirmed) — first a daughter (b.~1875), then head of a 4-person household.
Age 35
b. ~1875
Female
Daughter
Born: Ireland
Single
1910 Census Record Details
| Census Year | 1910 |
| Location | Middlesex, Massachusetts |
| Surname | Leahy |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 35 |
| Marital Status | Single |
| Birthplace | Ireland |
| Year of Immigration | 1890 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Additional Details | |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
| Township / Ward | Lowell City |
| Est. Birth Year | ~1875 |
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.
4 people recorded at the same address in the 1910 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Susan Carey | Spouse | — | 48 | ~1862 |
| John Carey | Head | — | 47 | ~1863 |
| Mary Leahy | Daughter | — | 35 | ~1875 |
| John Leahy | Other | — | 60 | ~1850 |
Census Appearances
1900
Middlesex, Massachusetts
Other, age 28
Middlesex, Massachusetts · implied b. ~1872 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Leahy |
| Given Name | Mary |
| Relationship to Head | Boarder |
| Sex | F |
| Color / Race | White |
| Age | 27 |
| Marital Status | Single |
| Birthplace | Ireland |
| Birth Month | Oct |
| Birth Year | 1872 |
| Year of Immigration | 1891 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Cartridge Shop |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1910
Middlesex, Massachusetts
Daughter, age 35
Middlesex, Massachusetts · implied b. ~1875 — 4 household members
| Surname | Leahy |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 35 |
| Marital Status | Single |
| Birthplace | Ireland |
| Year of Immigration | 1890 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
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 Mary Leahy across 2 US Census years (1900 and 1910) in Middlesex, Massachusetts, using XGBoost record linkage.
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This person
Anchor record
Mary Leahy
Daughter · 1910 · age 35 · b. ~1875 · Massachusetts
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1910 US Federal Census — Middlesex, Massachusetts
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1910 US Federal Census — Middlesex, Massachusetts
Page Contents
50 people indexed on this census page (ia:1910:13thcensus1910po599unit:0283)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Annie | 35 | Head | Keeper | Ireland |
| 2 | Herbert | 8 | Son | — | Massachusetts |
| 3 | Catherine | 6 | Daughter | — | Massachusetts |
| 4 | Mary | 4 | Daughter | — | Massachusetts |
| 5 | Theresa | 2 | Daughter | — | Massachusetts |
| 6 | John Cannon | 26 | Boarder | English | Connecticut |
| 7 | Jack O'Neil | 26 | Boarder | English | Massachusetts |
| 8 | Lena Donahue | 26 | Boarder | English | Massachusetts |
| 9 | John Leary | 29 | Boarder | English | Massachusetts |
| 10 | Michael Donahue | 30 | Boarder | Laborer | Ireland |
| 11 | Joseph | 38 | Boarder | English | Massachusetts |
| 12 | Mabel | 30 | Boarder | English | Massachusetts |
| 13 | Mabel | 5 | Boarder | — | Massachusetts |
| 14 | Daniel Coakley | 38 | Head | — | Ireland |
| 15 | John Coakley | 14 | Son | English | Massachusetts |
| 16 | Daniel Coakley | 11 | Son | English | Massachusetts |
| 17 | Mary Coakley | 7 | Daughter | — | Massachusetts |
| 18 | John Carey | 47 | Head | Laborer | Ireland |
| 19 | Susan Carey | 48 | Wife | — | Ireland |
| 20 | John Leahy | 60 | Boarder | — | Ireland |
| 21 | Mary Leahy THIS PERSON | 35 | Daughter | — | Ireland |
| 22 | Theodore Belanger | 53 | Head | Laborer | Canada French |
| 23 | Philomena Belanger | 47 | Wife | — | Canada French |
| 24 | Georgiana Belanger | 20 | Daughter | — | Canada French |
| 25 | Victoria Belanger | 16 | Daughter | Weaver | Canada French |
| 26 | Blanche Belanger | 25 | Daughter | Speeder | Canada French |
| 27 | Mary Belanger | 24 | Daughter | Spinner | Canada French |
| 28 | Mary Ann Belanger | 18 | Daughter | Spinner | Canada French |
| 29 | Edward Belanger | 20 | Son | — | Canada French |
| 30 | Sadie Belanger | 12 | Daughter | — | Canada French |
| 31 | Kate Meedan | 34 | Head | — | Ireland |
| 32 | Annie Meedan | 11 | Daughter | English | Massachusetts |
| 33 | John J Meedan | 7 | Son | — | Massachusetts |
| 34 | Helena Meedan | 1 | Daughter | — | Massachusetts |
| 35 | Nora Meedan | 5 | Daughter | — | Massachusetts |
| 36 | Mary Meedan | 32 | Boarder | Inspector | Ireland |
| 37 | Mary Langton | 20 | Boarder | English | Massachusetts |
| 38 | Linda Gibson | 45 | Boarder | — | Ireland |
| 39 | Maurice Donohue | 58 | Boarder | Laborer | Ireland |
| 40 | John Kingsley | 60 | Boarder | — | Ireland |
| 41 | Nellie Wood | 56 | Head | — | Ireland |
| 42 | John Wood | 20 | Son | English | Massachusetts |
| 43 | Mae Wood | 18 | Daughter | English | Massachusetts |
| 44 | Mary Wood | 16 | Daughter | English | Massachusetts |
| 45 | William Hananan | 42 | Boarder | Helper | Ireland |
| 46 | Frank Casey | 36 | Head | Proprietor | England |
| 47 | Mary Casey | 35 | Wife | Housekeeper | Ireland |
| 48 | Annie Casey | 13 | Daughter | English | Massachusetts |
| 49 | Albert J Casey | 3 | Son | — | Massachusetts |
| 50 | Marion O'Donnell | 63 | Boarder | Laborer | Ireland |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1910 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)