DS
Dennis Sullivan — 1920 US Census Record
Model Tree available1920 United States Federal Census · Merrimack, New Hampshire
Our Model Tree links this Dennis Sullivan across the 1900, 1910 and 1920 US Censuses in Merrimack, New Hampshire (XGBoost, ~Confirmed), with identified parents Michael & Michael — first a son (b.~1897), then head of a 11-person household.
Age 23
b. ~1897
Male
Son
Born: New Hampshire
Single
1920 Census Record Details
| Census Year | 1920 |
| Location | Merrimack, New Hampshire |
| Surname | Sullivan |
| Given Name | Dennis T |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | New Hampshire |
| Father's Birthplace | New Hampshire |
| Mother's Birthplace | Ireland |
| Additional Details | |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | New Hampshire |
| Birth Country | United States |
| Birthplace (normalized) | new hampshire |
| Township / Ward | Concord City |
| Est. Birth Year | ~1897 |
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.
11 people recorded at the same address in the 1920 census.
| Name | Relation to head | Relative to Dennis | Age | Birth yr |
|---|---|---|---|---|
| Mary Sullivan | Spouse | — | 43 | ~1877 |
| Catherine Sullivan | Daughter | — | 11 | ~1909 |
| Helen Sullivan | Daughter | — | 10 | ~1910 |
| Mary Sullivan | Daughter | — | 21 | ~1899 |
| Michael Sullivan | Son | — | 6 | ~1914 |
| Dennis Sullivan | Son | — | 23 | ~1897 |
| Michael Sullivan | Head | — | 55 | ~1865 |
| Robert Sullivan | Son | — | 3 | ~1917 |
| Julia Sullivan | Daughter | — | 14 | ~1906 |
| John Sullivan | Son | — | 19 | ~1901 |
| Henry Sullivan | Son | — | 16 | ~1904 |
Census Appearances
1900
Merrimack, New …
Son, age 3
Merrimack, New Hampshire · implied b. ~1897 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Sullivan |
| Given Name | Dennis T. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | New Hampshire |
| Birth Month | Nov |
| Birth Year | 1897 |
| Father's Birthplace | New Hampshire |
| Mother's Birthplace | Ireland |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | New Hampshire |
| Birth Country | United States |
| Birthplace (normalized) | new hampshire |
1910
Merrimack, New …
Son, age 13
Merrimack, New Hampshire · implied b. ~1897 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Sullivan |
| Given Name | Dennis J |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | New Hampshire |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | English |
| Birth State | New Hampshire |
| Birth Country | United States |
| Birthplace (normalized) | new hampshire |
1920
Merrimack, New …
Son, age 23
Merrimack, New Hampshire · implied b. ~1897 — 11 household members
| Surname | Sullivan |
| Given Name | Dennis T |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | New Hampshire |
| Father's Birthplace | New Hampshire |
| Mother's Birthplace | Ireland |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | New Hampshire |
| Birth Country | United States |
| Birthplace (normalized) | new hampshire |
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 Merrimack, New Hampshire, using XGBoost record linkage. Identified parents: father Michael Sullivan (~0.92 confidence) and father Michael Sullivan (~0.92 confidence) and father Michael Sullivan (~0.92 confidence) and mother Mary Sullivan (~0.92 confidence) and mother Mary Sullivan (~0.92 confidence) and mother Minnie Sullivan (~0.92 confidence). The pedigree spans 1 generation with 6 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Michael Sullivan
b. ~1865
Source father
● Household
· direct · ~0.92
Father
Michael Sullivan
b. ~1865
Source father
● Household
· direct · ~0.92
Father
Michael Sullivan
b. ~1864
Source father
● Household
· direct · ~0.92
Mother
Mary Sullivan
b. ~1877
Source mother
● Household
· direct · ~0.92
Mother
Mary Sullivan
b. ~1874
Source mother
● Household
· direct · ~0.92
Mother
Minnie Sullivan
b. ~1874
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Dennis Sullivan
Son · 1920 · age 23 · b. ~1897 · New Hampshire
★ You are viewing this record
Sibling
Michael Sullivan
Sibling · 1920 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Sullivan
Sibling · 1920 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Catherine Sullivan
Sibling · 1920 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Sullivan
Sibling · 1920 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Henry Sullivan
Sibling · 1920 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Sullivan
Sibling · 1920 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Helen Sullivan
Sibling · 1920 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Julia Sullivan
Sibling · 1920 · age 14
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
1920 US Federal Census — Merrimack, New Hampshire
Open full size
1920 US Federal Census — Merrimack, New Hampshire
Page Contents
50 people indexed on this census page (ia:1920:14thcensusofpopu1013unit:0404)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Michael J Sullivan | 55 | Head | — | New Hampshire |
| 2 | Mary G Sullivan | 43 | Wife | — | Ireland |
| 3 | Dennis T Sullivan THIS PERSON | 23 | Son | — | New Hampshire |
| 4 | Mary E Sullivan | 21 | Daughter | Stenographer | New Hampshire |
| 5 | John B Sullivan | 19 | Son | Draughtsman | New Hampshire |
| 6 | Henry F Sullivan | 16 | Son | — | New Hampshire |
| 7 | Julia R Sullivan | 14 | Daughter | — | New Hampshire |
| 8 | Catherine J Sullivan | 11 | Daughter | — | New Hampshire |
| 9 | Helen L Sullivan | 10 | Daughter | — | New Hampshire |
| 10 | Michael Jr Sullivan | 6 | Son | — | New Hampshire |
| 11 | Robert P Sullivan | 3 | Son | — | New Hampshire |
| 12 | Arthur A Corriveau | 47 | Head | Carpenter | New Hampshire |
| 13 | Amanda A Corriveau | 36 | Wife | — | Canada |
| 14 | Irene E Corriveau | 7 | Daughter | — | New Hampshire |
| 15 | Bertha G Corriveau | 5 | Daughter | — | New Hampshire |
| 16 | Florence I Corriveau | 2 | Daughter | — | New Hampshire |
| 17 | Clarence P Corriveau | 1 | Son | — | New Hampshire |
| 18 | Felix Valley | 44 | Head | Machinist | Canada |
| 19 | Josephine Valley | 46 | Wife | — | Canada |
| 20 | Philip Valley | 18 | Son | — | New Hampshire |
| 21 | Oscar Landry | 27 | Head | Boilermaker | Canada |
| 22 | Angeline Landry | 27 | Wife | — | Canada |
| 23 | Gabrielle Landry | 1 | Daughter | — | New Hampshire |
| 24 | James J Berryman | 27 | Head | Boilermaker | New Hampshire |
| 25 | Bertha M Berryman | 31 | Wife | — | New Hampshire |
| 26 | Dorothy M Berryman | 6 | Daughter | — | New Hampshire |
| 27 | Thomas J Berryman | 4 | Son | — | New Hampshire |
| 28 | Frank P Leahy | 37 | Head | Painter | New Hampshire |
| 29 | Bridget Leahy | 68 | Wife | — | Ireland |
| 30 | Arthur Leahy | 30 | Son | — | New Hampshire |
| 31 | Thomas J Pender | 21 | Brother-in-law | — | Ireland |
| 32 | David M Berryman | 38 | Head | Moulder | England |
| 33 | Clara G Berryman | 41 | Wife | — | New Hampshire |
| 34 | William D Berryman | 30 | Son | Salesman | New Hampshire |
| 35 | Catherine Berryman | 20 | Daughter | — | New Hampshire |
| 36 | Mary J Berryman | 14 | Daughter | — | New Hampshire |
| 37 | Margaret U Berryman | 11 | Daughter | — | New Hampshire |
| 38 | Ellen E Page | 24 | Daughter | Waitress | New Hampshire |
| 39 | Loren B Page | 3 | Grandson | — | New Hampshire |
| 40 | William R Page | 1 | Grandson | — | New Hampshire |
| 41 | Harriet Sargent | 77 | Head | — | Massachusetts |
| 42 | Edward C Sargent | 61 | Son | Janitor | New Hampshire |
| 43 | John Mccanley | 53 | Head | Machinist | Canada |
| 44 | Kate Mccanley | 53 | Wife | — | New Hampshire |
| 45 | Marion E Mccanley | 21 | Daughter | Cashier | New Hampshire |
| 46 | Sidney S Upham | 78 | Head | Blacksmith | New Hampshire |
| 47 | Angeline A Upham | 78 | Wife | — | New Hampshire |
| 48 | Sidney S Morgan | 46 | Daughter | Saleslady | New Hampshire |
| 49 | Ruth G Morgan | 20 | Granddaughter | Stenographer | New Hampshire |
| 50 | Martin Geary | 54 | Head | Carpenter | Canada |
Related Census Records
Pedigree Summary
Dennis + 8 siblings
Gen 1 · 6 parents
~0.92
Max depth 4 (1900–1950 window)
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1920 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)