JL
John Leahy — 1900 US Census Record
Linked across censuses1900 United States Federal Census · Worcester, Massachusetts
Our Model Tree links this John Leahy across the 1900 and 1910 US Censuses in Worcester, Massachusetts (XGBoost, ~Confirmed) — first a head (b.~1862), then head of a 6-person household.
Age 38
b. ~1862
Male
Head
Born: Ireland
Married
1900 Census Record Details
| Census Year | 1900 |
| Location | Worcester, Massachusetts |
| Surname | Leahy |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 37 |
| Marital Status | Married |
| Birthplace | Ireland |
| Birth Month | Nov |
| Birth Year | 1862 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Additional Details | |
| Occupation | Laborer |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
| Occupation | Laborer |
| Township / Ward | Worcester City |
| Est. Birth Year | ~1862 |
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.
6 people recorded at the same address in the 1900 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Daniel Leahy | Son | — | 5 | ~1895 |
| John Leahy | Head | — | 38 | ~1862 |
| Bridget Leahy | Spouse | — | 32 | ~1868 |
| Patrick Leahy | Son | — | 7 | ~1893 |
| John Leahy | Son | — | ~1900 | |
| Michael Leahy | Son | — | 3 | ~1897 |
Census Appearances
1900
Worcester, Massachusetts
Head, age 38
Worcester, Massachusetts · implied b. ~1862 — 6 household members
| Surname | Leahy |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 37 |
| Marital Status | Married |
| Birthplace | Ireland |
| Birth Month | Nov |
| Birth Year | 1862 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Laborer |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1910
Worcester, Massachusetts
Other, age 48
Worcester, Massachusetts · implied b. ~1862 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Leahy |
| Given Name | John |
| Relationship to Head | Cousin |
| Sex | M |
| Color / Race | White |
| Age | 48 |
| Marital Status | Single |
| Birthplace | Ireland |
| Year of Immigration | 1889 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Inspector |
| Industry | Cars R.R. |
| 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 John Leahy across 2 US Census years (1900 and 1910) in Worcester, Massachusetts, using XGBoost record linkage.
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This person
Anchor record
John Leahy
Head · 1900 · age 38 · b. ~1862 · Massachusetts
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1900 US Federal Census — Worcester, Massachusetts
Open full size
1900 US Federal Census — Worcester, Massachusetts
Page Contents
50 people indexed on this census page (ia:1900:12thcensusofpopu697unit:0149)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | John Conroy | 16 | Son | Bell-Boy | Massachusetts |
| 52 | James Conroy | 17 | Son | Laborer | Massachusetts |
| 53 | Matthew Conroy | 14 | Son | At School | Massachusetts |
| 54 | Mary Conroy | 12 | Daughter | At School | Massachusetts |
| 55 | Sarah Conroy | 27 | Daughter | Domestic | Massachusetts |
| 56 | Mary Conroy | 25 | Daughter | Domestic | Massachusetts |
| 57 | Daniel Conroy | 24 | Son | Park Keeper | Massachusetts |
| 58 | John M Vail | 35 | Head | Fruit & Produce Dealer | Vermont |
| 59 | Emma Vail | 33 | Wife | — | Massachusetts |
| 60 | Blanche Vail | 11 | Daughter | At School | Massachusetts |
| 61 | Bertha Vail | 6 | Daughter | At School | Massachusetts |
| 62 | Charles Vail | 5 | Son | At School | Massachusetts |
| 63 | Marietta Vail | 3 | Daughter | — | Massachusetts |
| 64 | Eva Vail | 1 | Daughter | — | Massachusetts |
| 65 | Edward G Vail | 36 | Cousin | Produce Dealer | Vermont |
| 66 | John Gormont | 54 | Head | Laborer | Canada (Fr) |
| 67 | Olivine Gormont | 54 | Wife | — | Canada (Fr) |
| 68 | Theresa Gormont | 28 | Daughter | Saleslady Dry Goods | Massachusetts |
| 69 | Eugene Gormont | 16 | Son | Book-Keeper | Massachusetts |
| 70 | Eugene Gormont | 11 | Son | At School | Massachusetts |
| 71 | Edward Gormont | 8 | Son | At School | Massachusetts |
| 72 | John Callahan | 38 | Head | Laborer | Ireland |
| 73 | Lizzie Callahan | 38 | Wife | — | Ireland |
| 74 | Mary Callahan | 9 | Daughter | At School | Massachusetts |
| 75 | Bessie Callahan | 8 | Daughter | At School | Massachusetts |
| 76 | John Kane | 30 | Boarder | Laborer | Ireland |
| 77 | Martin Kane | 23 | Boarder | Laborer | Ireland |
| 78 | Thomas Mara | 53 | Head | Moulder | Massachusetts |
| 79 | Hannah Mara | 48 | Wife | — | Ireland |
| 80 | Annie Mara | 18 | Daughter | Corset Shop | Massachusetts |
| 81 | Gertie Mara | 16 | Daughter | Corset Shop | Massachusetts |
| 82 | Joseph Mara | 8 | Son | At School | Massachusetts |
| 83 | Mary Shea | 90 | M-in-law | — | Ireland |
| 84 | James Fitzgibbons | 35 | Head | Teamster | Ireland |
| 85 | Bridget Fitzgibbons | 31 | Wife | — | Ireland |
| 86 | Francis Fitzgibbons | 10 | Son | At School | Massachusetts |
| 87 | Edward Fitzgibbons | 8 | Son | At School | Massachusetts |
| 88 | Agnes Fitzgibbons | 7 | Daughter | At School | Massachusetts |
| 89 | Mary Fitzgibbons | 3 | Daughter | — | Massachusetts |
| 90 | Catharine Fitzgibbons | 1 | Daughter | — | Massachusetts |
| 91 | John Leahy THIS PERSON | 37 | Head | Laborer | Ireland |
| 92 | Bridget Leahy | 32 | Wife | Laborer | Ireland |
| 93 | Patrick Leahy | 6 | Son | At School | Massachusetts |
| 94 | Daniel Leahy | 4 | Son | At School | Massachusetts |
| 95 | Michael Leahy | 2 | Son | — | Massachusetts |
| 96 | John Leahy | 0 | Son | — | Massachusetts |
| 97 | Hans Andreasen | 45 | Head | Laborer | Norway |
| 98 | Annie Andreasen | 29 | Daughter | — | Norway |
| 99 | Peter Andreasen | 8 | Son | — | Norway |
| 100 | Eric Andreasen | 2 | Daughter | — | Norway |
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)