DS
Dennis Sullivan — 1900 US Census Record
Linked across censuses1900 United States Federal Census · Middlesex, Massachusetts
Our Model Tree links this Dennis Sullivan across the 1900, 1910 and 1920 US Censuses in Middlesex, Massachusetts (XGBoost, ~Confirmed) — first a head (b.~1831), then head of a 9-person household.
Age 69
b. ~1831
Male
Head
Born: Ireland
Married
1900 Census Record Details
| Census Year | 1900 |
| Location | Middlesex, Massachusetts |
| Surname | Sullivan |
| Given Name | Dennis |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 68 |
| Marital Status | Married |
| Birthplace | Ireland |
| Birth Month | Aug |
| Birth Year | 1831 |
| Year of Immigration | 1855 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Additional Details | |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
| Township / Ward | Lowell City |
| Est. Birth Year | ~1831 |
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 1900 census.
| Name | Relation to head | Relative to Dennis | Age | Birth yr |
|---|---|---|---|---|
| Ella Sullivan | Daughter | — | 28 | ~1872 |
| Mary Sullivan | Spouse | — | 57 | ~1843 |
| Mary Sullivan | Daughter | — | 26 | ~1874 |
| Cornelius Sullivan | Son | — | 34 | ~1866 |
| Dennis Sullivan | Son | — | 27 | ~1873 |
| Katie Sullivan | Daughter | — | 32 | ~1868 |
| Dennis Sullivan | Head | — | 69 | ~1831 |
| Thomas Sullivan | Son | — | 22 | ~1878 |
| Margaret Sullivan | Daughter | — | 20 | ~1880 |
Census Appearances
1900
Middlesex, Massachusetts
Head, age 69
Middlesex, Massachusetts · implied b. ~1831 — 9 household members
| Surname | Sullivan |
| Given Name | Dennis |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 68 |
| Marital Status | Married |
| Birthplace | Ireland |
| Birth Month | Aug |
| Birth Year | 1831 |
| Year of Immigration | 1855 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1910
Middlesex, Massachusetts
Other, age 79
Middlesex, Massachusetts · implied b. ~1831 — 50 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Sullivan |
| Given Name | Dennis |
| Relationship to Head | Inmate |
| Sex | M |
| Color / Race | White |
| Age | 79 |
| Marital Status | Widowed |
| Birthplace | Ireland |
| Year of Immigration | 1878 |
| Naturalization Status | Alien |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | English |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1920
Middlesex, Massachusetts
Other, age 88
Middlesex, Massachusetts · implied b. ~1832 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Sullivan |
| Given Name | Dennis |
| Relationship to Head | Father-in-law |
| Sex | M |
| Color / Race | White |
| Age | 88 |
| Marital Status | Widowed |
| Birthplace | Ireland |
| Year of Immigration | 1851 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Birth Country | Ireland |
| Year of Naturalization | 1857 |
| 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 Dennis Sullivan across 3 US Census years (1900, 1910 and 1920) in Middlesex, Massachusetts, using XGBoost record linkage.
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This person
Anchor record
Dennis Sullivan
Head · 1900 · age 69 · b. ~1831 · 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 — Middlesex, Massachusetts
Open full size
1900 US Federal Census — Middlesex, Massachusetts
Page Contents
50 people indexed on this census page (ia:1900:12thcensusofpopu660unit:0427)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | William E. Harriman | 25 | Son | Supt. (Manufacturing) | Massachusetts |
| 52 | Ira M. Harriman | 23 | Daughter | Weaver | Massachusetts |
| 53 | Sarah H. Mitchler | 52 | Boarder | House Keeper | Canada (Eng) |
| 54 | Ethel M. Harris | 0 | Daughter | At School | Massachusetts |
| 55 | Fanny Hull | 27 | Boarder | Stitcher (Hosiery) | New York |
| 56 | Mabel A. Chase | 19 | Boarder | Drilling (Corp) | Connecticut |
| 57 | Celia Glass | 26 | Boarder | Table Maker | Maine |
| 58 | Harry Sandilands | 24 | Head | Cook | Massachusetts |
| 59 | Sarah Sandilands | 22 | Wife | Laundress | Massachusetts |
| 60 | James F. Mclaughlan | 31 | Boarder | Baker (Dry Plate) | Massachusetts |
| 61 | James E. Mckeon | 33 | Head | Salesman | Ireland |
| 62 | Hannah E. Mckeon | 25 | Wife | — | Massachusetts |
| 63 | Mary Mckeon | 2 | Daughter | — | Massachusetts |
| 64 | Dennis Sullivan THIS PERSON | 68 | Head | — | Ireland |
| 65 | Mary Sullivan | 56 | Wife | — | Ireland |
| 66 | Cornelius F. Sullivan | 33 | Son | Spinner (Wool) | Massachusetts |
| 67 | Katie F. Sullivan | 32 | Daughter | Sewing At Home | Massachusetts |
| 68 | Ella L. Sullivan | 27 | Daughter | House Work | Massachusetts |
| 69 | Dennis F. Sullivan | 27 | Son | Pressman (Print) | Massachusetts |
| 70 | Mary Sullivan | 26 | Daughter | Transferer (Hosiery) | Massachusetts |
| 71 | Thomas J. Sullivan | 21 | Son | Pharmacist | Massachusetts |
| 72 | Margaret E. Sullivan | 19 | Daughter | Inspector (Hosiery) | Massachusetts |
| 73 | Mary E. Chatney | 47 | Head | Dress Maker | Vermont |
| 74 | Rosabelle K. Chatney | 24 | Daughter | — | Canada |
| 75 | Adela Godfrey | 23 | Boarder | Operative (Bleachery) | New Hampshire |
| 76 | William C. O'Neil | 45 | Head | Machinist | Vermont |
| 77 | Elmina C. O'Neil | 40 | Wife | — | New York |
| 78 | Charles F. O'Neil | 18 | Son | Machinist | Massachusetts |
| 79 | Catherine M. O'Neil | 16 | Daughter | Tally Girl (Hosiery) | Massachusetts |
| 80 | George R. O'Neil | 11 | Son | At School | Massachusetts |
| 81 | Helen M. O'Neil | 8 | Daughter | At School | Massachusetts |
| 82 | Owen C. O'Neil | 5 | Son | — | Massachusetts |
| 83 | James Mcclodden | 40 | Head | Carpenter | Scotland |
| 84 | Annie Mcclodden | 37 | Wife | — | New Brunswick |
| 85 | Mary Mcclodden | 16 | Daughter | Spinner (Wool) | New Brunswick |
| 86 | William Mcclodden | 14 | Son | At School | New Brunswick |
| 87 | Nellie Mcclodden | 12 | Daughter | At School | New Brunswick |
| 88 | James C. Mcclodden | 11 | Son | At School | Massachusetts |
| 89 | Thomas Mcclodden | 9 | Son | — | Massachusetts |
| 90 | David Mcclodden | 7 | Son | — | Massachusetts |
| 91 | Agnes Mcclodden | 4 | Daughter | — | Massachusetts |
| 92 | Sarah A. Clements | 48 | Head | — | Massachusetts |
| 93 | Susan R. Clements | 27 | Daughter | Transferer (Hosiery) | Massachusetts |
| 94 | Robert J. Clements | 24 | Son | Clerk (Belt Mill) | Massachusetts |
| 95 | Frederick Clements | 22 | Son | Printer (Cotton Mill) | Massachusetts |
| 96 | Sarah Clements | 18 | Daughter | Inspector (Wool Mill) | Massachusetts |
| 97 | Charlotte Clements | 17 | Daughter | Dressmaker | Massachusetts |
| 98 | George B. Clements | 13 | Son | At School | Massachusetts |
| 99 | Ruth W. Clements | 9 | Daughter | — | Massachusetts |
| 100 | William Kelley | 26 | Head | Blacksmith (Z.M.C.) | New Brunswick |
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)