JC
John Cassidy — 1910 US Census Record
Linked across censuses1910 United States Federal Census · Middlesex, Massachusetts
Our Model Tree links this John Cassidy across the 1900 and 1910 US Censuses in Middlesex, Massachusetts (XGBoost, ~Confirmed) — first a head (b.~1866), then head of a 9-person household.
Age 44
b. ~1866
Male
Head
Born: Ireland
Married
1910 Census Record Details
| Census Year | 1910 |
| Location | Middlesex, Massachusetts |
| Surname | Cassidy |
| Given Name | John F |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 44 |
| Marital Status | Married |
| Birthplace | Ireland |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Additional Details | |
| Occupation | Laborer |
| Industry | General |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
| Occupation | Laborer |
| Township / Ward | Lowell |
| Est. Birth Year | ~1866 |
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 1910 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| John Cassidy | Head | — | 44 | ~1866 |
| Edward Cassidy | Son | — | 1 | ~1909 |
| Harold Cassidy | Son | — | 14 | ~1896 |
| John Cassidy | Son | — | 10 | ~1900 |
| Maurice Cassidy | Son | — | 15 | ~1895 |
| Frank Cassidy | Son | — | 12 | ~1898 |
| Robert Cassidy | Son | — | 5 | ~1905 |
| James Cassidy | Son | — | 7 | ~1903 |
| Edna Cassidy | Spouse | — | 35 | ~1875 |
Census Appearances
1900
Middlesex, Massachusetts
Head, age 36
Middlesex, Massachusetts · implied b. ~1864 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cassidy |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 35 |
| Marital Status | Married |
| Birthplace | Ireland |
| Birth Month | July |
| Birth Year | 1864 |
| Year of Immigration | 1891 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Day Laborer |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1910
Middlesex, Massachusetts
Head, age 44
Middlesex, Massachusetts · implied b. ~1866 — 9 household members
| Surname | Cassidy |
| Given Name | John F |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 44 |
| Marital Status | Married |
| Birthplace | Ireland |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Laborer |
| Industry | General |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| 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 Cassidy across 2 US Census years (1900 and 1910) in Middlesex, Massachusetts, using XGBoost record linkage.
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This person
Anchor record
John Cassidy
Head · 1910 · age 44 · b. ~1866 · 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:1910:13thcensus1910po607unit:0498)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | James Manning | 40 | Head | Laborer | England |
| 2 | Michael Manning | 42 | Brother | Laborer | England |
| 3 | John Manning | 50 | Brother | Laborer | England |
| 4 | Mary Manning | 40 | Sister | — | England |
| 5 | Annie Manning | 38 | Sister | — | England |
| 6 | Annie Cassidy | 75 | Head | — | Ireland |
| 7 | Mary Cassidy | 45 | Daughter | — | Ireland |
| 8 | John F Cassidy THIS PERSON | 44 | Head | Laborer | Ireland |
| 9 | Edna M Cassidy | 35 | Wife | — | Massachusetts |
| 10 | Maurice Cassidy | 15 | Son | — | Massachusetts |
| 11 | Harold Cassidy | 14 | Son | — | Massachusetts |
| 12 | Frank Cassidy | 12 | Son | — | Massachusetts |
| 13 | John P Cassidy | 10 | Son | — | Massachusetts |
| 14 | James Cassidy | 7 | Son | — | Massachusetts |
| 15 | Robert Cassidy | 5 | Son | — | Massachusetts |
| 16 | Edward Cassidy | 1 | Son | — | Massachusetts |
| 17 | Michael O'Brien | 28 | Head | Laborer | Ireland |
| 18 | Margaret O'Brien | 24 | Wife | — | Ireland |
| 19 | Vincent O'Brien | 2 | Son | — | Massachusetts |
| 20 | Mary O'Brien | 1 | Daughter | — | Massachusetts |
| 21 | William July | 10 | Step-son | — | Massachusetts |
| 22 | Margaret July | 8 | Step-daughter | — | Massachusetts |
| 23 | Mary July | 6 | Step-daughter | — | Massachusetts |
| 24 | Mary Scanlon | 65 | Boarder | — | Ireland |
| 25 | Amos A Greenough | 47 | Head | Laborer | Canada |
| 26 | Rosa Greenough | 44 | Wife | — | Canada |
| 27 | Anna Greenough | 21 | Daughter | — | Canada |
| 28 | Emerson Greenough | 19 | Son | Laborer | Canada |
| 29 | Arthur Greenough | 16 | Son | Laborer | Canada |
| 30 | Mabel Greenough | 12 | Daughter | — | Massachusetts |
| 31 | Florence Greenough | 10 | Daughter | — | Massachusetts |
| 32 | Esther Greenough | 3 | Daughter | — | Massachusetts |
| 33 | John Clark | 37 | Head | Laborer | Ireland |
| 34 | Mary Clark | 31 | Wife | — | Ireland |
| 35 | Nelson Clark | 4 | Son | — | Massachusetts |
| 36 | Ethel Clark | 1 | Daughter | — | Massachusetts |
| 37 | Anna Tankers | 52 | Head | — | Ireland |
| 38 | John Tankers | 27 | Son | Laborer | Massachusetts |
| 39 | Joseph Tankers | 21 | Son | Laborer | Massachusetts |
| 40 | Maria Tankers | 16 | Daughter | — | Massachusetts |
| 41 | Hilda Tankers | 14 | Daughter | — | Massachusetts |
| 42 | Frederick Nelson | 54 | Boarder | Laborer | Sweden |
| 43 | Amos E Potter | 52 | Head | Laborer | Maine |
| 44 | Theodosia Potter | 35 | Wife | — | Canada |
| 45 | Bertha Potter | 5 | Daughter | — | Massachusetts |
| 46 | Wallace Potter | 4 | Son | — | Massachusetts |
| 47 | George Potter | 1 | Son | — | Massachusetts |
| 48 | Theodore Crooks | 50 | Head | Laborer | England |
| 49 | Sarah Crooks | 37 | Wife | — | Ireland |
| 50 | Frank Crooks | 9 | Son | — | Massachusetts |
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)