FS
Florence Sullivan — 1940 US Census Record
Model Tree available1940 United States Federal Census · Suffolk-County, Massachusetts
Our Model Tree links this Florence Sullivan across the 1920, 1930 and 1940 US Censuses in Suffolk-County, Massachusetts (XGBoost, ~Confirmed), with identified parents Dennis & Patrick — first a daughter (b.~1919), then head of a 6-person household.
Age 21
b. ~1919
Female
Daughter
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Suffolk-County, Massachusetts |
| Surname | Sullivan |
| Given Name | Florence M. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston |
| 1935 Residence (County) | Suffolk |
| Additional Details | |
| Occupation | Typist |
| Industry | Clerk Coal office |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1040 |
| Highest Grade | H 4 |
| 1935 Residence | Same house |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Typist |
| Township / Ward | Boston |
| Est. Birth Year | ~1919 |
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 Florence | Age | Birth yr |
|---|---|---|---|---|
| Alicia Sullivan | Daughter | — | 19 | ~1921 |
| Patrick Sullivan | Head | — | 70 | ~1870 |
| Florence Sullivan | Daughter | — | 21 | ~1919 |
| Catherine Sullivan | Spouse | — | 55 | ~1885 |
| Margaret Sullivan | Daughter | — | 30 | ~1910 |
| Patricia Sullivan | Daughter | — | 24 | ~1916 |
Census Appearances
1920
Suffolk, Massachusetts
Daughter, age 1
Suffolk, Massachusetts · implied b. ~1919 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Sullivan |
| Given Name | Florence |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Suffolk, Massachusetts
Daughter, age 11
Suffolk, Massachusetts · implied b. ~1919 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Sullivan |
| Given Name | Florence |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Suffolk-County, Massachusetts
Daughter, age 21
Suffolk-County, Massachusetts · implied b. ~1919 — 6 household members
| Surname | Sullivan |
| Given Name | Florence M. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston |
| 1935 Residence (County) | Suffolk |
| Occupation | Typist |
| Industry | Clerk Coal office |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1040 |
| Highest Grade | H 4 |
| 1935 Residence | Same house |
| 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 Florence Sullivan across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Dennis Sullivan (~0.92 confidence) and father Patrick Sullivan (~0.92 confidence) and mother Catherine Sullivan (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Dennis Sullivan
b. ~1890
Source father
● Household
· direct · ~0.92
Father
Patrick Sullivan
b. ~1870
Source father
● Household
· direct · ~0.92
Mother
Catherine Sullivan
b. ~1885
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Florence Sullivan
Daughter · 1940 · age 21 · b. ~1919 · Massachusetts
★ You are viewing this record
Sibling
Alicia Sullivan
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Patricia Sullivan
Sibling · 1940 · age 24
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Sullivan
Sibling · 1940 · age 30
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-t0627-01674-00410)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | John Kelley | 9 | Son | — | Massachusetts |
| 42 | Virginia Kelley | 8 | Daughter | — | Massachusetts |
| 43 | Robert Kelley | 6 | Son | — | Massachusetts |
| 44 | Charles Kelley | 1 | Son | — | Massachusetts |
| 45 | Theresa Furlong | 28 | Sisterinlaw | Practical Nurse | Eire |
| 46 | Margaret Byrne | 73 | Head | — | Massachusetts |
| 47 | James T. Byrne | 40 | Son | Second Assessor | Massachusetts |
| 48 | Mary O'Leary | 72 | Sister | — | Massachusetts |
| 49 | Ellen M. Riley | 52 | Head | — | Massachusetts |
| 50 | Mary S. Riley | 18 | Daughter | — | Massachusetts |
| 51 | Mary Pettitt | 82 | Head | — | Massachusetts |
| 52 | George R. Pettitt | 42 | Son | Railway Mail Clerk | Massachusetts |
| 53 | Lillian J. Pettitt | 38 | Daughter | Ledger Clerk | Massachusetts |
| 54 | Patrick J. Sullivan | 70 | Head | — | Maine |
| 55 | Catherine Sullivan | 55 | Wife | — | Massachusetts |
| 56 | Margaret Sullivan | 30 | Daughter | Investigator | Massachusetts |
| 57 | Patricia Sullivan | 24 | Daughter | Stenographer | Massachusetts |
| 58 | Florence M. Sullivan THIS PERSON | 21 | Daughter | Typist | Massachusetts |
| 59 | Alicia P. Sullivan | 19 | Daughter | — | Massachusetts |
| 60 | John Dacey | 35 | Head | Police Officer | Massachusetts |
| 61 | Kathleen Dacey | 28 | Wife | — | Massachusetts |
| 62 | John Dacey | 3 | Son | — | Massachusetts |
| 63 | Patricia Dacey | 2 | Daughter | — | Massachusetts |
| 64 | Edwin G. Ackerman | 77 | Head | — | England |
| 65 | William Kennedy | 29 | Head | Shipper | Massachusetts |
| 66 | Regina Kennedy | 31 | Wife | — | Massachusetts |
| 67 | William Kennedy | 2 | Son | — | Massachusetts |
| 68 | Regina Kennedy | 1 | Daughter | — | Massachusetts |
| 69 | Robert A. O'Brien | 48 | Head | Machinist | Eire |
| 70 | Kathleen O'Brien | 40 | Wife | — | Eire |
| 71 | Louis Riscia | 40 | Head | Laborer | Italy |
| 72 | Louise Riscia | 22 | Wife | — | Italy |
| 73 | Adele Riscia | 4 | Daughter | — | Massachusetts |
| 74 | Elizabeth Mcdonough | 73 | Head | — | Eire |
| 75 | Annie Mcdonough | 62 | Sister | — | Eire |
| 76 | Extra Line | None | — | — | — |
| 77 | John Shea | 40 | Head | Electrician | Massachusetts |
| 78 | Kathleen L. Shea | 29 | Wife | — | Massachusetts |
| 79 | Ann Shea | 1 | Daughter | — | Massachusetts |
| 80 | James J. Lunn | 49 | Head | Lead Worker | Eire |
Pedigree Summary
Florence + 3 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)