JL
John Leonard — 1910 US Census Record
Linked across censuses1910 United States Federal Census · Middlesex, Massachusetts
Our Model Tree links this John Leonard across the 1900, 1910 and 1920 US Censuses in Middlesex, Massachusetts (XGBoost, ~Confirmed) — first a head (b.~1860), then head of a 7-person household.
Age 50
b. ~1860
Male
Head
Born: Ireland
Married
1910 Census Record Details
| Census Year | 1910 |
| Location | Middlesex, Massachusetts |
| Surname | Leonard |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 50 |
| Marital Status | Married |
| Birthplace | Ireland |
| Years Married | 25 |
| Year of Immigration | 1870 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Additional Details | |
| Occupation | Laborer |
| Industry | City |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
| Occupation | Laborer |
| Township / Ward | Lowell City |
| Est. Birth Year | ~1860 |
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.
7 people recorded at the same address in the 1910 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Annie Leonard | Daughter | — | 16 | ~1894 |
| Mary Leonard | Daughter | — | 22 | ~1888 |
| John Leonard | Head | — | 50 | ~1860 |
| James Leonard | Son | — | 18 | ~1892 |
| John Leonard | Son | — | 24 | ~1886 |
| Thomas Leonard | Son | — | 20 | ~1890 |
| Mary Leonard | Spouse | — | 48 | ~1862 |
Census Appearances
1900
Middlesex, Massachusetts
Head, age 39
Middlesex, Massachusetts · implied b. ~1861 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Leonard |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 39 |
| Marital Status | Married |
| Birthplace | Ireland |
| Birth Month | May |
| Birth Year | 1861 |
| Year of Immigration | 1870 |
| Naturalization Status | First papers filed |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Foreman |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1910
Middlesex, Massachusetts
Head, age 50
Middlesex, Massachusetts · implied b. ~1860 — 7 household members
| Surname | Leonard |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 50 |
| Marital Status | Married |
| Birthplace | Ireland |
| Years Married | 25 |
| Year of Immigration | 1870 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Laborer |
| Industry | City |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1920
Middlesex, Massachusetts
Other, age 60
Middlesex, Massachusetts · implied b. ~1860 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Leonard |
| Given Name | John |
| Relationship to Head | Brother-in-law |
| Sex | M |
| Color / Race | White |
| Age | 60 |
| Marital Status | Single |
| Birthplace | Ireland |
| Year of Immigration | 1871 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Laborer |
| Industry | Gas Co. |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Birth Country | Ireland |
| Year of Naturalization | 1878 |
| 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 Leonard across 3 US Census years (1900, 1910 and 1920) in Middlesex, Massachusetts, using XGBoost record linkage.
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This person
Anchor record
John Leonard
Head · 1910 · age 50 · b. ~1860 · 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
Open full size
1910 US Federal Census — Middlesex, Massachusetts
Page Contents
50 people indexed on this census page (ia:1910:13thcensus1910po601unit:0146)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | William Leonard | 30 | Head | — | Massachusetts |
| 52 | Mary Leonard | 28 | Wife | None | Massachusetts |
| 53 | William Leonard | 5 | Son | — | Massachusetts |
| 54 | John Leonard | 3 | Son | — | Massachusetts |
| 55 | Andrew Leonard | 0 | Son | — | Massachusetts |
| 56 | Andrew R. Leonard | 27 | Head | Laborer | Massachusetts |
| 57 | Mary Leonard | 21 | Wife | — | Massachusetts |
| 58 | John Leonard THIS PERSON | 50 | Head | Laborer | Ireland |
| 59 | Mary Leonard | 48 | Wife | None | Ireland |
| 60 | John Leonard | 24 | Son | Laborer | Massachusetts |
| 61 | Mary Leonard | 22 | Daughter | None | Massachusetts |
| 62 | Thomas Leonard | 20 | Son | None | Massachusetts |
| 63 | James Leonard | 18 | Son | None | Massachusetts |
| 64 | Annie Leonard | 16 | Daughter | None | Massachusetts |
| 65 | Mary Kelly | 52 | Head | None | Ireland |
| 66 | James Kelly | 17 | Son | None | Massachusetts |
| 67 | Mary Kelly | 15 | Daughter | None | Massachusetts |
| 68 | John Kelly | 14 | Son | None | Massachusetts |
| 69 | Thomas Kelly | 12 | Son | None | Massachusetts |
| 70 | Clement Anderson | 51 | Head | Tailor | Germany |
| 71 | Annie Anderson | 51 | Wife | None | Massachusetts |
| 72 | Ellen Flannery | 68 | Mother-in-law | None | Ireland |
| 73 | Annie Flannery | 28 | Sister-in-law | Operative | Massachusetts |
| 74 | Benjamin T. Cofee | 20 | Head | None | Massachusetts |
| 75 | Elizabeth Cofee | 18 | Wife | None | Massachusetts |
| 76 | James Pratt | 32 | Head | Teamster | Massachusetts |
| 77 | Mary Pratt | 31 | Sister | None | Massachusetts |
| 78 | Margaret Mcquade | 51 | Head | None | Ireland |
| 79 | James Mcquade | 58 | Brother | None | Ireland |
| 80 | John J. Mcquade | 44 | Head | Tower Man | New York |
| 81 | Margaret Mcquade | 43 | Wife | None | Ireland |
| 82 | Charles Mcquade | 14 | Son | None | Massachusetts |
| 83 | Esther Mcquade | 12 | Daughter | None | Massachusetts |
| 84 | Margaret Mcquade | 7 | Daughter | None | Massachusetts |
| 85 | Frank Mcquade | 6 | Son | None | Massachusetts |
| 86 | James Mcquade | 4 | Son | None | Massachusetts |
| 87 | James Mcquade | 52 | Head | Shoemaker | Ireland |
| 88 | Caroline Mcquade | 48 | Wife | None | Ireland |
| 89 | Henry Mcquade | 22 | Son | None | Massachusetts |
| 90 | Alice Mcquade | 20 | Daughter | None | Massachusetts |
| 91 | Rose Mcquade | 15 | Daughter | None | Massachusetts |
| 92 | William Mcquade | 13 | Son | None | Massachusetts |
| 93 | Bertha Mcquade | 11 | Daughter | None | Massachusetts |
| 94 | Abbie Cofee | 47 | Head | None | Massachusetts |
| 95 | William F. Cofee | 22 | Son | Teamster | Massachusetts |
| 96 | Thomas E. Cofee | 21 | Son | Mason | Massachusetts |
| 97 | Abel M. Cofee | 15 | Daughter | None | Massachusetts |
| 98 | Catherine Cofee | 12 | Daughter | None | Massachusetts |
| 99 | Augustus Cook | 55 | Head | None | England |
| 100 | Louisa Cook | 52 | Wife | None | England |
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)