DS
Dennis Sullivan — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Suffolk-County, Massachusetts
Our Model Tree links this Dennis Sullivan across the 1920, 1930 and 1940 US Censuses in Suffolk-County, Massachusetts (XGBoost, ~Confirmed) — first a head (b.~1878), then head of a 5-person household.
Age 62
b. ~1878
Male
Head
Born: Ireland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Suffolk-County, Massachusetts |
| Surname | Sullivan |
| Given Name | Dennis |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 62 |
| Marital Status | Married |
| Birthplace | Ireland |
| 1935 Residence (City) | Boston City |
| 1935 Residence (County) | Suffolk |
| Naturalization Status | Naturalized |
| Additional Details | |
| Occupation | laborer |
| Industry | City of Boston |
| Class of Worker | GW |
| Hours Worked | 44 |
| Income (1939) | 1500 |
| Highest Grade | No 6 |
| 1935 Residence | Same place |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
| Occupation | Laborer |
| Township / Ward | Boston City |
| Est. Birth Year | ~1878 |
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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Dennis | Age | Birth yr |
|---|---|---|---|---|
| Catherine Sullivan | Daughter | — | 24 | ~1916 |
| Dennis Sullivan | Head | — | 62 | ~1878 |
| Ellie Sullivan | Spouse | — | 56 | ~1884 |
| Eleanor Sullivan | Daughter | — | 22 | ~1918 |
| Michael Sullivan | Son | — | 24 | ~1916 |
Census Appearances
1920
Suffolk, Massachusetts
Head, age 41
Suffolk, Massachusetts · implied b. ~1879 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Sullivan |
| Given Name | Dennis |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 41 |
| Marital Status | Married |
| Birthplace | Ireland |
| Year of Immigration | 1903 |
| Naturalization Status | First papers filed |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Boiler Maker |
| Industry | Shop |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Home Owned/Rented | R |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1930
Suffolk, Massachusetts
Head, age 53
Suffolk, Massachusetts · implied b. ~1877 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Sullivan |
| Given Name | Dennis |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 53 |
| Marital Status | Married |
| Birthplace | Ireland |
| Naturalization Status | Naturalized |
| Year of Immigration | 1904 |
| Age at First Marriage | 27 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Builder |
| Industry | Building |
| Class of Worker | OA |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Home Owned/Rented | O |
| Home Value / Rent | 12000 |
| Radio Set | R |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1940
Suffolk-County, Massachusetts
Head, age 62
Suffolk-County, Massachusetts · implied b. ~1878 — 5 household members
| Surname | Sullivan |
| Given Name | Dennis |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 62 |
| Marital Status | Married |
| Birthplace | Ireland |
| 1935 Residence (City) | Boston City |
| 1935 Residence (County) | Suffolk |
| Naturalization Status | Naturalized |
| Occupation | laborer |
| Industry | City of Boston |
| Class of Worker | GW |
| Hours Worked | 44 |
| Income (1939) | 1500 |
| Highest Grade | No 6 |
| 1935 Residence | Same place |
| 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 Dennis Sullivan across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Dennis Sullivan
Head · 1940 · age 62 · b. ~1878 · Massachusetts
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Suffolk-County, Massachusetts
Open full size
1940 US Federal Census — Suffolk-County, Massachusetts
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01678-00558)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Myra Hayes | 21 | daughter | Senior Clerk | Massachusetts |
| 2 | Clarence E. Hayes | 19 | son | Musician | Massachusetts |
| 3 | Barbara L. Hayes | 18 | daughter | — | Massachusetts |
| 4 | Frank Di Marzio | 30 | Head | Machinist | Italy |
| 5 | Margaret Di Marzio | 28 | wife | — | Massachusetts |
| 6 | William Di Marzio | 3 | son | — | Massachusetts |
| 7 | Helen G. Mcdonough | 54 | Head | Supervisor | Massachusetts |
| 8 | Peter J. Mcdonough | 55 | brother | Tinsmith | Massachusetts |
| 9 | Lillian B. Mcdonough | 54 | sister | Housekeeper | Massachusetts |
| 10 | Patience Mcdonough | 45 | sister | — | Massachusetts |
| 11 | Emma Greer | 42 | niece | Secretary | Massachusetts |
| 12 | Dennis Sullivan THIS PERSON | 62 | Head | Laborer | Ireland |
| 13 | Ellie A. Sullivan | 56 | wife | — | Ireland |
| 14 | Michael H. Sullivan | 24 | son | Salesman | Mass. |
| 15 | Eleanor M. Sullivan | 22 | daughter | Secretary | Mass. |
| 16 | Catherine Sullivan | 24 | daughter | — | Mass. |
| 17 | Nellie La France | 56 | Head | — | England |
| 18 | Lillian La France | 25 | daughter | Presser | Connecticut |
| 19 | Raphael Guariglia | 39 | Head | Postman | Massachusetts |
| 20 | Jennie Guariglia | 34 | wife | — | Italy |
| 21 | Fred Guariglia | 13 | son | — | Massachusetts |
| 22 | Anthony Guariglia | 12 | son | — | Massachusetts |
| 23 | Anne Guariglia | 8 | daughter | — | Massachusetts |
| 24 | Robert Guariglia | 6 | son | — | Massachusetts |
| 25 | Thomas Guariglia | 4 | son | — | Massachusetts |
| 26 | John Guariglia | 2 | son | — | Massachusetts |
| 27 | Jeanette Guariglia | 0 | daughter | — | Massachusetts |
| 28 | Annie M. Mcmahon | 80 | Head | — | Ireland |
| 29 | Michael J. Walsh | 46 | Head | Salesmanager | Ireland |
| 30 | Elizabeth Walsh | 44 | wife | — | Massachusetts |
| 31 | Madeline Walsh | 20 | daughter | Bookkeeper | Massachusetts |
| 32 | Virginia Walsh | 15 | daughter | — | Massachusetts |
| 33 | Paul Walsh | 11 | son | — | Massachusetts |
| 34 | Richard Walsh | 5 | son | — | Massachusetts |
| 35 | Patrick Coughlin | 35 | Head | Machinist | Massachusetts |
| 36 | Ruth E. Coughlin | 33 | wife | Sorter | Massachusetts |
| 37 | Ralph D. Coughlin | 2 | son | — | Massachusetts |
| 38 | Ralph D. Tenney | 64 | father | — | New York |
| 39 | Sarah Tenney | 67 | mother | — | Massachusetts |
| 40 | Frederick P. Tenney | 31 | brother | Breaker | Massachusetts |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1940 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)