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 John & Nellie — first a head (b.~1893), then head of a 6-person household.
Age 47
b. ~1893
Male
Head
Born: Ireland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Suffolk-County, Massachusetts |
| Surname | Sullivan |
| Given Name | Daniel |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 47 |
| Marital Status | Married |
| Birthplace | Ireland |
| 1935 Residence (City) | Boston City |
| 1935 Residence (County) | Suffolk |
| Naturalization Status | Naturalized |
| Additional Details | |
| Occupation | Laborer |
| Industry | Rail Road |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 900 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
| Occupation | Laborer |
| Township / Ward | Boston City |
| Est. Birth Year | ~1893 |
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 |
|---|---|---|---|---|
| Helen Sullivan | Daughter | — | 15 | ~1925 |
| Marie Sullivan | Daughter | — | 16 | ~1924 |
| Daniel Sullivan | Head | — | 47 | ~1893 |
| James Sullivan | Son | — | 10 | ~1930 |
| John Sullivan | Son | — | 13 | ~1927 |
| Mary Sullivan | Spouse | — | 40 | ~1900 |
Census Appearances
1920
Suffolk, Massachusetts
Son, age 26
Suffolk, Massachusetts · implied b. ~1894 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Sullivan |
| Given Name | Daniel |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 26 |
| Marital Status | Single |
| Birthplace | Ireland |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Fireman |
| Industry | Fire Dept. |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1930
Suffolk, Massachusetts
Head, age 38
Suffolk, Massachusetts · implied b. ~1892 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Sullivan |
| Given Name | Dan |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 38 |
| Marital Status | Married |
| Birthplace | Ireland |
| Naturalization Status | First papers filed |
| Year of Immigration | 1919 |
| Age at First Marriage | 24 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Porter |
| Industry | Insurance Co |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Home Owned/Rented | O |
| Home Value / Rent | 8000 |
| Radio Set | R |
| Veteran | No |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1940
Suffolk-County, Massachusetts
Head, age 47
Suffolk-County, Massachusetts · implied b. ~1893 — 6 household members
| Surname | Sullivan |
| Given Name | Daniel |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 47 |
| Marital Status | Married |
| Birthplace | Ireland |
| 1935 Residence (City) | Boston City |
| 1935 Residence (County) | Suffolk |
| Naturalization Status | Naturalized |
| Occupation | Laborer |
| Industry | Rail Road |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 900 |
| Highest Grade | No 8 |
| 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 Daniel Sullivan across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father John Sullivan (~0.92 confidence) and mother Nellie Sullivan (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
John Sullivan
b. ~1863
Source father
● Household
· direct · ~0.92
Mother
Nellie Sullivan
b. ~1868
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Daniel Sullivan
Head · 1940 · age 47 · b. ~1893 · Massachusetts
★ You are viewing this record
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-t0627-01669-00469)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Margaret Grant | 16 | Daughter | — | Massachusetts |
| 42 | Doris Baton | 13 | Daughter | — | Massachusetts |
| 43 | Lillian Conner | 41 | Head | No No No No H | Massachusetts |
| 44 | Joseph Conner | 16 | Son | No No No No S | Massachusetts |
| 45 | Robert Conner | 15 | Son | — | Massachusetts |
| 46 | William Conner | 11 | Son | — | Massachusetts |
| 47 | Martin Clinton | 59 | Head | Shoe Worker | Massachusetts |
| 48 | Sadie Clinton | 55 | Wife | No No No No H | Canada |
| 49 | Francis Clinton | 24 | Son | Machinist | Massachusetts |
| 50 | Michael Duffin | 47 | Head | Brass Molder | Ireland |
| 51 | Mary A Duffin | 45 | Wife | No No No No H | Ireland |
| 52 | Margaret Duffin | 19 | Daughter | Houseworker | Massachusetts |
| 53 | Francis Duffin | 17 | Son | No No No No S | Massachusetts |
| 54 | Kathyleen Duffin | 14 | Daughter | No No No No S | Massachusetts |
| 55 | Thomas Duffin | 12 | Son | — | Massachusetts |
| 56 | Christine Duffin | 10 | Daughter | — | Massachusetts |
| 57 | John Diggins | 25 | Head | Police Officer | Ireland |
| 58 | Joan Diggins | 30 | Wife | No No No No H | Ireland |
| 59 | John Diggins | 4 | Son | — | Massachusetts |
| 60 | Kevin J Diggins | 2 | Son | — | Massachusetts |
| 61 | Pete Mcdonald | 36 | Head | Warehouseman | Canada |
| 62 | Irene Mcdonald | 35 | Wife | — | Canada |
| 63 | Dorothy Mcdonald | 12 | Daughter | — | Massachusetts |
| 64 | Allan Mcdonald | 10 | Son | — | Massachusetts |
| 65 | Hilda Mcdonald | 7 | Daughter | — | Massachusetts |
| 66 | John Mcdonald | 5 | Son | — | Massachusetts |
| 67 | Eugene Mcdonald | 3 | Son | — | Massachusetts |
| 68 | Dennis Sweeney | 31 | Head | Oiler | Ireland |
| 69 | Helen Sweeney | 32 | Wife | No No No No H | Ireland |
| 70 | Anna Sweeney | 11 | Daughter | — | Massachusetts |
| 71 | Mary Sweeney | 10 | Daughter | — | Massachusetts |
| 72 | Catherine Sweeney | 8 | Daughter | — | Massachusetts |
| 73 | Theresa Sweeney | 6 | Daughter | — | Massachusetts |
| 74 | Helen Sweeney | 4 | Daughter | — | Massachusetts |
| 75 | Daniel Sullivan THIS PERSON | 47 | Head | Laborer | Ireland |
| 76 | Mary Sullivan | 40 | Wife | No No No No H | Ireland |
| 77 | Marie Sullivan | 16 | Daughter | No No No No S | Massachusetts |
| 78 | Helen Sullivan | 15 | Daughter | — | Massachusetts |
| 79 | John Sullivan | 13 | Son | — | Massachusetts |
| 80 | James Sullivan | 10 | Son | — | Massachusetts |
Pedigree Summary
Daniel
Gen 1 · 2 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)