TS
Thomas Sullivan — 1940 US Census Record
Model Tree available1940 United States Federal Census · Suffolk-County, Massachusetts
Our Model Tree links this Thomas Sullivan across the 1920, 1930 and 1940 US Censuses in Suffolk-County, Massachusetts (XGBoost, ~Confirmed), with identified parents Margaret — first a son (b.~1895), then head of a 4-person household.
Age 45
b. ~1895
Male
Son
Born: Mass.
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Suffolk-County, Massachusetts |
| Surname | Sullivan |
| Given Name | Thomas |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 45 |
| Marital Status | Single |
| Birthplace | Mass. |
| 1935 Residence (City) | Boston |
| 1935 Residence (County) | Suffolk |
| Additional Details | |
| Occupation | Salesman |
| Industry | Retail Store |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 1200 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | mass |
| Occupation | Salesman |
| Township / Ward | Boston |
| Est. Birth Year | ~1895 |
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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Thomas | Age | Birth yr |
|---|---|---|---|---|
| Margaret Sullivan | Daughter | — | 50 | ~1890 |
| Margaret Sullivan | Head | — | 75 | ~1865 |
| Thomas Sullivan | Son | — | 45 | ~1895 |
| Jeremiah Sullivan | Son | — | 40 | ~1900 |
Census Appearances
1920
Suffolk, Massachusetts
Other, age 24
Suffolk, Massachusetts · implied b. ~1896 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Sullivan |
| Given Name | Thomas |
| Relationship to Head | Lodger |
| Sex | M |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | Mass. |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Orderly |
| Industry | Hospital |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | mass |
1930
Suffolk, Massachusetts
Other, age 34
Suffolk, Massachusetts · implied b. ~1896 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Sullivan |
| Given Name | Thomas |
| Sex | M |
| Color / Race | White |
| Age | 34 |
| Marital Status | Single |
| Birthplace | Mass |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Salesman |
| Industry | Shoe |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | mass |
1940
Suffolk-County, Massachusetts
Son, age 45
Suffolk-County, Massachusetts · implied b. ~1895 — 4 household members
| Surname | Sullivan |
| Given Name | Thomas |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 45 |
| Marital Status | Single |
| Birthplace | Mass. |
| 1935 Residence (City) | Boston |
| 1935 Residence (County) | Suffolk |
| Occupation | Salesman |
| Industry | Retail Store |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 1200 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | mass |
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 Thomas Sullivan across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Margaret Sullivan (~0.92 confidence). The pedigree spans 1 generation with 1 identified ancestor.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Margaret Sullivan
b. ~1865
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Thomas Sullivan
Son · 1940 · age 45 · b. ~1895 · Massachusetts
★ You are viewing this record
Sibling
Margaret Sullivan
Sibling · 1940 · age 50
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Jeremiah Sullivan
Sibling · 1940 · age 40
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-t0627-01676-00494)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Rose Byrne | 36 | Daughter | Clerk | Mass. |
| 42 | Pauline Byrne | 35 | Daughter | Teacher | Mass. |
| 43 | Martha Pringel | 66 | Head | — | New York |
| 44 | Beda Pesteria | 66 | Lodger | — | Sweden |
| 45 | Jennie Carleton | 75 | Lodger | — | Mass. |
| 46 | Margaret Sullivan | 75 | Head | — | Ireland |
| 47 | Margaret Sullivan | 50 | Daughter | Investigating Clerk | Mass. |
| 48 | Thomas Sullivan THIS PERSON | 45 | Son | Salesman | Mass. |
| 49 | Jeremiah Sullivan | 40 | Son | Salesman | Mass. |
| 50 | William Mackie | 57 | Head | Gardener | Ireland |
| 51 | Rosalie Mackie | 24 | Daughter | Office Asst | Ireland |
| 52 | Emily Mackie | 23 | Daughter | Stenographer | Ireland |
| 53 | Frances Mackie | 21 | Daughter | Waitress | Ireland |
| 54 | Kathleen Mackie | 18 | Daughter | 36 | Ireland |
| 55 | Patrick Burns | 73 | Head | Laborer | Ireland |
| 56 | Elizabeth Burns | 68 | Wife | — | England |
| 57 | Andrew Burns | 45 | Son | Driver | Mass. |
| 58 | Elizabeth Burns | 38 | Daughter | — | Mass. |
| 59 | Mary E. Oakes | 49 | Daughter | — | Mass. |
| 60 | Margaret Mahoney | 73 | Head | — | Mass. |
| 61 | Elizabeth Mahoney | 60 | Sister | Cashier | Mass. |
| 62 | Ella Mahoney | 50 | Sister | Bookkeeper | Mass. |
| 63 | Frances Mahoney | 45 | Sister | Bookkeeper | Mass. |
| 64 | Carl F. Gore | 50 | Head | Inspector | Mass. |
| 65 | Vera R. Gore | 43 | Wife | Salesgirl | Mass. |
| 66 | Russell Gore | 15 | Son | — | Mass. |
| 67 | Elizabeth Gore | 13 | Daughter | — | Mass. |
| 68 | Jessie Ramsey | 32 | Lodger | — | Canada-Eng |
| 69 | Ida Richland | 63 | Head | — | Mass. |
| 70 | Ida Richland | 36 | Daughter | Clerk | Mass. |
| 71 | Mary Pope | 86 | Lodger | — | South Carolina |
| 72 | Ida Steeves | 80 | Lodger | — | Canada-Eng |
| 73 | Nellie Steeves | 52 | Lodger | Secretary | Canada-Eng |
| 74 | Michael Quinn | 53 | Head | Foreman | Mass. |
| 75 | Ellen Quinn | 51 | Wife | — | Ireland |
| 76 | Mary Quinn | 17 | Daughter | — | Mass. |
| 77 | Joseph Quinn | 16 | Son | — | Mass. |
| 78 | Margaret Mcmanus | 42 | Lodger | Registered Nurse | Canada-Eng |
| 79 | Harriet Babcock | 53 | Lodger | Seamstress | Mass. |
| 80 | Mary Baker | 71 | Lodger | — | England |
Pedigree Summary
Thomas + 2 siblings
Gen 1 · 1 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)