DS
Daniel Sullivan — 1940 US Census Record
Model Tree available1940 United States Federal Census · Suffolk-County, Massachusetts
Our Model Tree links this Daniel Sullivan across the 1920, 1930 and 1940 US Censuses in Suffolk-County, Massachusetts (XGBoost, ~Confirmed), with identified parents Michael & Margaret — first a son (b.~1911), then head of a 6-person household.
Age 29
b. ~1911
Male
Son
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Suffolk-County, Massachusetts |
| Surname | Sullivan |
| Given Name | Daniel |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 29 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston |
| 1935 Residence (County) | Suffolk |
| Additional Details | |
| Occupation | Salesman |
| Industry | Wholesale Food |
| Class of Worker | PW |
| Hours Worked | 45 |
| Income (1939) | 88 |
| Highest Grade | No 8 |
| 1935 Residence | Same Place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Salesman |
| Township / Ward | Boston |
| Est. Birth Year | ~1911 |
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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Daniel | Age | Birth yr |
|---|---|---|---|---|
| Marion Sullivan | Daughter | — | 17 | ~1923 |
| Harriet Sullivan | Daughter | — | 22 | ~1918 |
| Margaret Sullivan | Head | — | 62 | ~1878 |
| Carroll Sullivan | Son | — | 39 | ~1901 |
| John Sullivan | Son | — | 36 | ~1904 |
| Daniel Sullivan | Son | — | 29 | ~1911 |
Census Appearances
1920
Suffolk, Massachusetts
Son, age 8
Suffolk, Massachusetts · implied b. ~1912 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Sullivan |
| Given Name | Daniel A. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 8 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Canada |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Suffolk, Massachusetts
Son, age 19
Suffolk, Massachusetts · implied b. ~1911 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Sullivan |
| Given Name | Daniel A |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Canada-English |
| Occupation | Filing Clerk |
| Industry | Edison |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Suffolk-County, Massachusetts
Son, age 29
Suffolk-County, Massachusetts · implied b. ~1911 — 6 household members
| Surname | Sullivan |
| Given Name | Daniel |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 29 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston |
| 1935 Residence (County) | Suffolk |
| Occupation | Salesman |
| Industry | Wholesale Food |
| Class of Worker | PW |
| Hours Worked | 45 |
| Income (1939) | 88 |
| Highest Grade | No 8 |
| 1935 Residence | Same Place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
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 Daniel Sullivan across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Michael Sullivan (~0.92 confidence) and mother Margaret Sullivan (~0.92 confidence) and mother Margaret Sullivan (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Michael Sullivan
b. ~1872
Source father
● Household
· direct · ~0.92
Mother
Margaret Sullivan
b. ~1878
Source mother
● Household
· direct · ~0.92
Mother
Margaret Sullivan
b. ~1878
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Daniel Sullivan
Son · 1940 · age 29 · b. ~1911 · Massachusetts
★ You are viewing this record
Sibling
John Sullivan
Sibling · 1940 · age 36
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Marion Sullivan
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Carroll Sullivan
Sibling · 1940 · age 39
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Harriet Sullivan
Sibling · 1940 · age 22
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
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-t0627-01676-00170)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Edith Cortis | 46 | Wife | — | Massachusetts |
| 2 | Elvin Jr Cortis | 20 | Son | Boiler Room Helper | Massachusetts |
| 3 | Jacqueline Cortis | 17 | Daughter | — | Massachusetts |
| 4 | Isabelle Cortis | 8 | Daughter | — | Massachusetts |
| 5 | Cordelia Chase | 75 | Mother-in-law | — | Massachusetts |
| 6 | John Sweeney | 29 | Head | Electrician Helper | Massachusetts |
| 7 | Mildred Sweeney | 26 | Wife | — | Massachusetts |
| 8 | Rosemary Sweeney | 0 | Infant | — | Massachusetts |
| 9 | Gum Yin Wong | 56 | Head | Laundryman | California |
| 10 | Wing Ben Wong | 17 | Son | — | China |
| 11 | Wing Hong Wong | 16 | Son | — | China |
| 12 | Benjamin Peters | 57 | Head | Caterer | Russia |
| 13 | Leonard Peters | 24 | Son | Personnel | Massachusetts |
| 14 | Sarah R. Adams | 42 | Daughter | Personnel | Massachusetts |
| 15 | Margaret Sullivan | 62 | Head | — | Canada English |
| 16 | Carroll Sullivan | 39 | Son | Purchasing Agent | Massachusetts |
| 17 | John M. Sullivan | 36 | Son | Salesman | Massachusetts |
| 18 | Daniel Sullivan THIS PERSON | 29 | Son | Salesman | Massachusetts |
| 19 | Harriet Sullivan | 22 | Daughter | Waitress | Massachusetts |
| 20 | Marion Sullivan | 17 | Daughter | — | Massachusetts |
| 21 | Mary Colbert | 50 | Head | — | Newfoundland |
| 22 | Edward Colbert | 24 | Son | Checker | Massachusetts |
| 23 | Madeline Colbert | 22 | Daughter | Waitress | Massachusetts |
| 24 | Joseph Colbert | 21 | Son | Maker | Massachusetts |
| 25 | Rita Colbert | 17 | Daughter | — | Massachusetts |
| 26 | Philip Colbert | 40 | Brother-in-law | Captain | Newfoundland |
| 27 | Peter Ryan | 38 | Boarder | Captain | Newfoundland |
| 28 | Bernard Krantzberg | 39 | Head | Owner | Russia |
| 29 | Clara Krantzberg | 28 | Wife | — | Massachusetts |
| 30 | Joel Krantzberg | 6 | Son | — | Massachusetts |
| 31 | May Krantzberg | 4 | Daughter | — | Massachusetts |
| 32 | Myer Kaplan | 38 | Head | Owner | Russia |
| 33 | Mina Kaplan | 37 | Wife | — | Massachusetts |
| 34 | Arthur Kaplan | 4 | Son | — | Massachusetts |
| 35 | Brenda Kaplan | 1 | Daughter | — | Massachusetts |
| 36 | Eugene Courtenay | 57 | Head | Postal Supervisor | Pennsylvania |
| 37 | Ella Courtenay | 57 | Wife | — | Massachusetts |
| 38 | William Hayes | 62 | Head | Supervisor | Massachusetts |
| 39 | Mary Hayes | 61 | Wife | — | Massachusetts |
| 40 | William Charlton | 20 | Nephew | — | Massachusetts |
Pedigree Summary
Daniel + 4 siblings
Gen 1 · 3 parents
~0.92
Max depth 4 (1900–1950 window)
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)