FS
Francis Sullivan — 1940 US Census Record
Model Tree available1940 United States Federal Census · Suffolk-County, Massachusetts
Our Model Tree links this Francis Sullivan across the 1910, 1920, 1930 and 1940 US Censuses in Suffolk-County, Massachusetts (XGBoost, ~Confirmed), with identified parents Ellen & William — first a head (b.~1901), then head of a 4-person household.
Age 39
b. ~1901
Male
Head
Born: Massachusetts
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Suffolk-County, Massachusetts |
| Surname | Sullivan |
| Given Name | Francis F |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 39 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston City |
| 1935 Residence (County) | Suffolk |
| Additional Details | |
| Occupation | Chauffeur |
| Industry | Contractor |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1560 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Chauffeur |
| Township / Ward | Boston City |
| Est. Birth Year | ~1901 |
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 Francis | Age | Birth yr |
|---|---|---|---|---|
| Ann Sullivan | Daughter | — | 6 | ~1934 |
| Margaret Sullivan | Daughter | — | 2 | ~1938 |
| Francis Sullivan | Head | — | 39 | ~1901 |
| Margaret Sullivan | Spouse | — | 30 | ~1910 |
Census Appearances
1910
Suffolk, Massachusetts
Son, age 7
Suffolk, Massachusetts · implied b. ~1903 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Sullivan |
| Given Name | Francis T |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 7 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1920
Suffolk, Massachusetts
Son, age 16
Suffolk, Massachusetts · implied b. ~1904 — 11 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Sullivan |
| Given Name | Francis G |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Maine |
| Occupation | apprentice |
| Industry | automobile |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Suffolk, Massachusetts
Son, age 27
Suffolk, Massachusetts · implied b. ~1903 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Sullivan |
| Given Name | Francis A. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Maine |
| Occupation | Chauffeur |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Suffolk-County, Massachusetts
Head, age 39
Suffolk-County, Massachusetts · implied b. ~1901 — 4 household members
| Surname | Sullivan |
| Given Name | Francis F |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 39 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston City |
| 1935 Residence (County) | Suffolk |
| Occupation | Chauffeur |
| Industry | Contractor |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1560 |
| Highest Grade | H 4 |
| 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 Francis Sullivan across 4 US Census years (1910, 1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Ellen Sullivan (~0.92 confidence) and father William Sullivan (~0.92 confidence) and father William Sullivan (~0.92 confidence) and father Thomas Sullivan (~0.92 confidence) and mother Mary Sullivan (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Ellen Sullivan
b. ~1870
Source mother
● Household
· direct · ~0.92
Father
William Sullivan
b. ~1870
Source father
● Household
· direct · ~0.92
Father
William Sullivan
b. ~1870
Source father
● Household
· direct · ~0.92
Father
Thomas Sullivan
b. ~1875
Source father
● Household
· direct · ~0.92
Mother
Mary Sullivan
b. ~1876
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Francis Sullivan
Head · 1940 · age 39 · b. ~1901 · 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-t0627-01668-00515)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Mary C Reynolds | 22 | Daughter | Operator | Massachusetts |
| 42 | Michael Gavin | 55 | Head | Stationary Engineer | Ireland |
| 43 | Mary Gavin | 55 | Wife | — | Massachusetts |
| 44 | John J Gavin | 25 | Son | Helper Machinist | Massachusetts |
| 45 | Mary M Gavin | 19 | Daughter | — | Massachusetts |
| 46 | Walter H Gavin | 13 | Son | — | Massachusetts |
| 47 | Florence J Sullivan | 59 | Head | Laborer | Massachusetts |
| 48 | Hannah G Sullivan | 59 | Wife | — | Massachusetts |
| 49 | Eleanor R Sullivan | 25 | Daughter | Typist | Massachusetts |
| 50 | John F Sullivan | 24 | Son | Draftsman | Massachusetts |
| 51 | Anna M Sullivan | 21 | Daughter | Stenographer | Massachusetts |
| 52 | Mary W Goldrick | 69 | Head | — | New York |
| 53 | Thomas F Goldrick | 33 | Son | Truck Driver | Massachusetts |
| 54 | James J Goldrick | 32 | Son | Truck Driver | Massachusetts |
| 55 | Daniel J Martinez | 70 | Head | — | Massachusetts |
| 56 | Sarah M Martinez | 61 | Wife | — | Ireland |
| 57 | Josephine Martinez | 36 | Daughter | Stenographer | Massachusetts |
| 58 | Alice C Martinez | 34 | Daughter | Stenographer | Massachusetts |
| 59 | Dennis Sullivan | 67 | Head | — | Free State |
| 60 | Ellen M Sullivan | 67 | Wife | — | Free State |
| 61 | Dennis B Sullivan | 32 | Son | Salesman | Massachusetts |
| 62 | Agnes C Sullivan | 25 | Daughter | Bookkeeper | Massachusetts |
| 63 | James E Duggan | 39 | Lodger | Salesman | Massachusetts |
| 64 | Francis F Sullivan THIS PERSON | 39 | Head | Chauffeur | Massachusetts |
| 65 | Margaret H Sullivan | 30 | Wife | — | Massachusetts |
| 66 | Ann M Sullivan | 6 | Daughter | — | Massachusetts |
| 67 | Margaret Sullivan | 2 | Daughter | — | Massachusetts |
| 68 | John J O'Connell | 37 | Head | Repairman | Ireland |
| 69 | Rita J O'Connell | 35 | Wife | Specialist | Massachusetts |
| 70 | Mary C Riley | 18 | Cousin | — | Massachusetts |
| 71 | Robert F Leahy | 37 | Head | Bricklayer | Massachusetts |
| 72 | Margaret E Leahy | 33 | Wife | — | Massachusetts |
| 73 | Robert J Leahy | 10 | Son | — | Massachusetts |
| 74 | Daniel J Clifford | 26 | Brother in law | Bricklayer | Massachusetts |
| 75 | Edward P Killoran | 41 | Head | Shipper | New York |
| 76 | Bridget M Killoran | 36 | Wife | — | Ireland |
| 77 | Justin M Brooks | 43 | Head | Collector | Massachusetts |
| 78 | Margaret R Brooks | 40 | Wife | — | Massachusetts |
| 79 | Robert M Brooks | 13 | Son | — | Massachusetts |
| 80 | Joseph D Kennington | 44 | Head | Starter | New York |
Related Census Records
Pedigree Summary
Francis
Gen 1 · 5 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)