DS
Dorothy Sullivan — 1940 US Census Record
Model Tree available1940 United States Federal Census · Middlesex-County, Massachusetts
Our Model Tree links this Dorothy Sullivan across the 1920, 1930 and 1940 US Censuses in Middlesex-County, Massachusetts (XGBoost, ~Confirmed), with identified parents Francis & Francis — first a spouse (b.~1909), then head of a 4-person household.
Age 31
b. ~1909
Female
Spouse
Born: Massachusetts
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, Massachusetts |
| Surname | Sullivan |
| Given Name | Dorothy D. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 31 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston |
| 1935 Residence (County) | Suffolk |
| Additional Details | |
| Highest Grade | H-3 |
| 1935 Residence | Massachusetts |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | Malden City |
| Est. Birth Year | ~1909 |
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 Dorothy | Age | Birth yr |
|---|---|---|---|---|
| Dorothy Sullivan | Spouse | — | 31 | ~1909 |
| Gerald Sullivan | Son | — | 2 | ~1938 |
| James Sullivan | Son | — | 4 | ~1936 |
| James Sullivan | Head | — | 28 | ~1912 |
Census Appearances
1920
Middlesex, Massachusetts
Daughter, age 11
Middlesex, Massachusetts · implied b. ~1909 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Sullivan |
| Given Name | Dorothy |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Canada |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Middlesex, Massachusetts
Daughter, age 21
Middlesex, Massachusetts · implied b. ~1909 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Sullivan |
| Given Name | Dorothy |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Newfoundland |
| Occupation | Office |
| Industry | Electric Co |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Middlesex-County, Massachusetts
Spouse, age 31
Middlesex-County, Massachusetts · implied b. ~1909 — 4 household members
| Surname | Sullivan |
| Given Name | Dorothy D. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 31 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston |
| 1935 Residence (County) | Suffolk |
| Highest Grade | H-3 |
| 1935 Residence | Massachusetts |
| 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 Dorothy Sullivan across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Francis Sullivan (~0.92 confidence) and father Francis Sullivan (~0.92 confidence) and mother Esther Sullivan (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Francis Sullivan
b. ~1883
Source father
● Household
· direct · ~0.92
Father
Francis Sullivan
b. ~1884
Source father
● Household
· direct · ~0.92
Mother
Esther Sullivan
b. ~1888
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Dorothy Sullivan
Spouse · 1940 · age 31 · b. ~1909 · 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 — Middlesex-County, Massachusetts
Open full size
1940 US Federal Census — Middlesex-County, Massachusetts
Page Contents
38 people indexed on this census page (nara:1940:m-t0627-01609-00315)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | John Dannah | 45 | Head | Machinist | Maine |
| 42 | Gertrude Dannah | 44 | Wife | — | Canada-Eng |
| 43 | Ruth L. Dannah | 20 | Daughter | Stenographer | Massachusetts |
| 44 | John Doyle | 70 | Head | — | Ohio |
| 45 | Mary Doyle | 35 | Daughter | Worker | Massachusetts |
| 46 | William Doyle | 21 | Son | New Worker | Massachusetts |
| 47 | James Doyle | 34 | Son | Salesman | Massachusetts |
| 48 | Mary Doyle | 34 | Daughter-in-law | — | Massachusetts |
| 49 | Mary Doyle | 10 | Granddaughter | — | Massachusetts |
| 50 | Margaret Doyle | 9 | Granddaughter | — | Massachusetts |
| 52 | Walter V. Jr. Kelley | 27 | Head | Grocery Clerk | Massachusetts |
| 53 | Stella F. Kelley | 23 | Wife | — | Massachusetts |
| 54 | Stella F. Kelley | 0 | Daughter | — | Massachusetts |
| 55 | Lucy M. Stirk | 64 | Head | — | Massachusetts |
| 56 | Mildred Cannon | 41 | Daughter | Waitress | Massachusetts |
| 57 | Arthur Cannon | 15 | Son | — | Massachusetts |
| 58 | Arthur Close | 46 | Boarder | Draftsman | Maine |
| 60 | Matthew Crofts | 60 | Head | Helper | Newfoundland |
| 61 | Henrietta Crofts | 58 | Wife | — | Canada-French |
| 62 | Robert Crofts | 36 | Son | — | Massachusetts |
| 63 | James Sullivan | 28 | Head | Shipper | Massachusetts |
| 64 | Dorothy D. Sullivan THIS PERSON | 31 | Wife | — | Massachusetts |
| 65 | James R. Sullivan | 4 | Son | — | Massachusetts |
| 66 | Gerald B. Sullivan | 2 | Son | — | Massachusetts |
| 67 | Paul Kelley | 35 | Head | — | Massachusetts |
| 68 | Mildred Kelley | 39 | Wife | Payroll Clerk | Massachusetts |
| 69 | Giovanni Maccario | 59 | Head | Barber | Italy |
| 70 | Angelina Maccario | 57 | Wife | — | Italy |
| 71 | Charles N. Maccario | 20 | Son | General Worker | Massachusetts |
| 72 | John R. Maccario | 28 | Son | General Worker | Massachusetts |
| 73 | Charles Randall | 43 | Head | Auto Mechanic | Massachusetts |
| 74 | Ruby Randall | 44 | Wife | — | Maine |
| 75 | Edward Randall | 22 | Son | Attendant | Massachusetts |
| 76 | Donald Cole | 42 | Head | Electrician | Massachusetts |
| 77 | Mary Cole | 44 | Wife | — | Massachusetts |
| 78 | Donald Cole | 16 | Son | — | Massachusetts |
| 79 | June Cole | 14 | Daughter | — | Massachusetts |
| 80 | Robert Cole | 13 | Son | — | Massachusetts |
Pedigree Summary
Dorothy
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)