JH
John Healy — 1900 US Census Record
Linked across censuses1900 United States Federal Census · Middlesex, Massachusetts
Our Model Tree links this John Healy across the 1900 and 1910 US Censuses in Middlesex, Massachusetts (XGBoost, ~Confirmed) — first a son (b.~1889), then head of a 10-person household.
Age 11
b. ~1889
Male
Son
Born: Massachusetts
Single
1900 Census Record Details
| Census Year | 1900 |
| Location | Middlesex, Massachusetts |
| Surname | Healy |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Birth Month | June |
| Birth Year | 1889 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| 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 | Waltham Mass |
| Est. Birth Year | ~1889 |
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.
10 people recorded at the same address in the 1900 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Katherine Healy | Daughter | — | 2 | ~1898 |
| Mary Healy | Daughter | — | 15 | ~1885 |
| Annie Healy | Daughter | — | 7 | ~1893 |
| Margaret Healy | Daughter | — | 9 | ~1891 |
| Nora Healy | Daughter | — | 12 | ~1888 |
| Patrick Healy | Head | — | 43 | ~1857 |
| John Healy | Son | — | 11 | ~1889 |
| Thomas Healy | Son | — | 8 | ~1892 |
| William Healy | Son | — | 4 | ~1896 |
| Annie Healy | Spouse | — | 41 | ~1859 |
Census Appearances
1900
Middlesex, Massachusetts
Son, age 11
Middlesex, Massachusetts · implied b. ~1889 — 10 household members
| Surname | Healy |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Birth Month | June |
| Birth Year | 1889 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | At School |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
Son, age 20
Middlesex, Massachusetts · implied b. ~1890 — 12 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Healey |
| Given Name | John |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | bookkeeper |
| Industry | foundry |
| 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 John Healy across 2 US Census years (1900 and 1910) in Middlesex, Massachusetts, using XGBoost record linkage.
Show:
This person
Anchor record
John Healy
Son · 1900 · age 11 · b. ~1889 · Massachusetts
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Sibling
Katherine Healy
Sibling · 1900 · age 2
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas Healy
Sibling · 1900 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Healy
Sibling · 1900 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Nora Healy
Sibling · 1900 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Healy
Sibling · 1900 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Healy
Sibling · 1900 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Annie Healy
Sibling · 1900 · age 7
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:1900:12thcensusofpopu667unit:0256)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | John Rader | 55 | Head | Teamster | Ireland |
| 2 | Bridget Rader | 46 | Wife | — | Ireland |
| 3 | Thomas Rader | 34 | Brother | — | Ireland |
| 4 | Katherine Whalen | 35 | Head | Washerwoman | Ireland |
| 5 | John Whalen | 16 | Son | Insurance Agent | Massachusetts |
| 6 | Ralph Whalen | 16 | Son | Back-Boy Mill | Massachusetts |
| 7 | Patrick Healy | 43 | Head | Teamster | Ireland |
| 8 | Annie Healy | 40 | Wife | — | Ireland |
| 9 | Mary Healy | 14 | Daughter | At School | Massachusetts |
| 10 | Nora Healy | 12 | Daughter | At School | Massachusetts |
| 11 | John Healy THIS PERSON | 10 | Son | At School | Massachusetts |
| 12 | Margaret Healy | 9 | Daughter | At School | Massachusetts |
| 13 | Thomas Healy | 7 | Son | At School | Massachusetts |
| 14 | Annie Healy | 6 | Daughter | At School | Massachusetts |
| 15 | William Healy | 3 | Son | — | Massachusetts |
| 16 | Katherine Healy | 1 | Daughter | — | Massachusetts |
| 17 | William Morgan | 61 | Head | Retired | Ireland |
| 18 | Sarah Morgan | 55 | Wife | — | Ireland |
| 19 | Thomas Morgan | 29 | Son | Paper Editor | Massachusetts |
| 20 | Ellen Morgan | 21 | Daughter | Milliner | Massachusetts |
| 21 | Amelia Sanderson | 46 | Sister | Hosiery Mender | Massachusetts |
| 22 | John Burke | 28 | Head | Coachman | Ireland |
| 23 | Mary Burke | 26 | Wife | — | Ireland |
| 24 | Harold Burke | 0 | Son | — | Massachusetts |
| 25 | Patrick Mooney | 56 | Head | Livery Stable | Ireland |
| 26 | Katherine Mooney | 54 | Wife | — | Ireland |
| 27 | John Mooney | 30 | Son | Undertaker | Massachusetts |
| 28 | William Mooney | 24 | Son | Livery Stable | Massachusetts |
| 29 | Caroline Bridget | 79 | Head | — | Massachusetts |
| 30 | Martin Walsh | 50 | Head | Laborer | Ireland |
| 31 | Mary Walsh | 60 | Wife | — | Ireland |
| 32 | Ella Walsh | 23 | Daughter | House Keeper | Rhode Island |
| 33 | Mrs P Mccarthy | 60 | Head | — | Ireland |
| 34 | Bridget Leonard | 54 | Head | House Keeper | Ireland |
| 35 | Katherine Leonard | 39 | Daughter | Watch Factory | England |
| 36 | Winnifred Leonard | 27 | Daughter | Watch Factory | England |
| 37 | Annie Leonard | 18 | Daughter | — | Massachusetts |
| 38 | Julia Leonard | 23 | Daughter | Watch Factory | Massachusetts |
| 39 | Winnifred Marnion | 11 | Granddaughter | At School | Massachusetts |
| 40 | Nolan Shay | 42 | Head | Laborer | Ireland |
| 41 | Mary Shay | 40 | Wife | — | Ireland |
| 42 | Delia Shay | 14 | Daughter | — | Massachusetts |
| 43 | Katherine Shay | 12 | Son | At School | Massachusetts |
| 44 | Christine Shay | 11 | Daughter | At School | Massachusetts |
| 45 | Mary Shay | 8 | Daughter | At School | Massachusetts |
| 46 | John Shay | 7 | Son | At School | Massachusetts |
| 47 | Frank Shay | 6 | Son | At School | Massachusetts |
| 48 | Alice Shay | 5 | Daughter | — | Massachusetts |
| 49 | Thomas Shay | 3 | Son | — | Massachusetts |
| 50 | Rosanna Shay | 1 | Daughter | — | Massachusetts |
Related Census Records
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)