KS
Katherine Sullivan — 1940 US Census Record
Model Tree available1940 United States Federal Census · Suffolk-County, Massachusetts
Our Model Tree links this Katherine Sullivan across the 1920, 1930 and 1940 US Censuses in Suffolk-County, Massachusetts (XGBoost, ~Confirmed), with identified parents Timothy & William — first a daughter (b.~1911), then head of a 3-person household.
Age 29
b. ~1911
Female
Daughter
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Suffolk-County, Massachusetts |
| Surname | Sullivan |
| Given Name | Katherine |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 29 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston City |
| 1935 Residence (County) | Suffolk |
| Additional Details | |
| Occupation | Clerk |
| Industry | Shoe Store |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 298 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Clerk |
| Township / Ward | Boston City |
| Est. Birth Year | ~1911 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Katherine | Age | Birth yr |
|---|---|---|---|---|
| Katherine Sullivan | Head | — | 51 | ~1889 |
| Katherine Sullivan | Daughter | — | 29 | ~1911 |
| Mary Sullivan | Daughter | — | 31 | ~1909 |
Census Appearances
1920
Suffolk, Massachusetts
Daughter, age 9
Suffolk, Massachusetts · implied b. ~1911 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Sullivan |
| Given Name | Kathleen |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 9 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Occupation | none |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Suffolk, Massachusetts
Daughter, age 19
Suffolk, Massachusetts · implied b. ~1911 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Sullivan |
| Given Name | Katherine A |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Occupation | Clerk |
| Industry | Telephone Co. |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Suffolk-County, Massachusetts
Daughter, age 29
Suffolk-County, Massachusetts · implied b. ~1911 — 3 household members
| Surname | Sullivan |
| Given Name | Katherine |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 29 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston City |
| 1935 Residence (County) | Suffolk |
| Occupation | Clerk |
| Industry | Shoe Store |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 298 |
| 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 Katherine Sullivan across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Timothy Sullivan (~0.92 confidence) and father William Sullivan (~0.92 confidence) and mother Katherine Sullivan (~0.92 confidence) and mother Katherine 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
Father
Timothy Sullivan
b. ~1882
Source father
● Household
· direct · ~0.92
Father
William Sullivan
b. ~1881
Source father
● Household
· direct · ~0.92
Mother
Katherine Sullivan
b. ~1880
Source mother
● Household
· direct · ~0.92
Mother
Katherine Sullivan
b. ~1889
Source mother
● Household
· direct · ~0.92
Mother
Mary Sullivan
b. ~1882
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Katherine Sullivan
Daughter · 1940 · age 29 · b. ~1911 · Massachusetts
★ You are viewing this record
Sibling
Mary Sullivan
Sibling · 1940 · age 31
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-t0627-01669-00766)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | John L. Gale | 56 | Head | Brakeman | Newfoundland |
| 2 | Mary Gale | 58 | Wife | — | Newfoundland |
| 3 | Ann Gale | 16 | Daughter | — | Massachusetts |
| 4 | Lorraine Gale | 19 | Daughter | — | Massachusetts |
| 5 | John P. Bonny | 29 | Head | Shipping Clerk | Massachusetts |
| 6 | Dorothy R. Bonny | 22 | Wife | — | Massachusetts |
| 7 | Lorraine Bonny | 1 | Daughter | — | Massachusetts |
| 8 | Charles F. Machale | 53 | Head | Clerk | Pennsylvania |
| 9 | Grace M. Machale | 51 | Wife | — | Canada |
| 10 | Doris Machale | 25 | Daughter | Hostess | Massachusetts |
| 11 | Paul Machale | 23 | Son | Salesman | Massachusetts |
| 12 | Catherine Dillon | 22 | Head | Typist | Massachusetts |
| 13 | Edith G. Dillon | 45 | Mother | — | Massachusetts |
| 14 | James Dillon | 17 | Son | — | Massachusetts |
| 15 | John Dillon | 9 | Son | — | Massachusetts |
| 16 | Rufus John Dillon | 48 | Brother | — | Massachusetts |
| 17 | Katherine Sullivan | 51 | Head | — | Ireland |
| 18 | Mary E. Sullivan | 31 | Daughter | Typist | Massachusetts |
| 19 | Katherine Sullivan THIS PERSON | 29 | Daughter | Clerk | Massachusetts |
| 20 | Charles E. Rachels | 31 | Head | Salesman | Massachusetts |
| 21 | Antoinette Rachels | 31 | Wife | — | Massachusetts |
| 22 | Charles E. Jr. Rachels | 1 | Son | — | Massachusetts |
| 23 | William Doyle | 27 | Head | — | Massachusetts |
| 24 | Dorothy B. Doyle | 27 | Wife | — | Massachusetts |
| 25 | Claire Doyle | 5 | Daughter | — | Massachusetts |
| 26 | William Jr. Doyle | 2 | Son | — | Massachusetts |
| 27 | Samuel Bragoli | 58 | Head | Supervisor | Italy |
| 28 | Sandra Bragoli | 52 | Wife | — | Italy |
| 29 | Mary Edstrom | 24 | Daughter | — | Massachusetts |
| 30 | Bernard Edstrom | 24 | Son-in-law | Electrician | Massachusetts |
| 31 | Ella E. Mcewan | 72 | Head | — | Canada |
| 32 | Alfred Mcewan | 38 | Son | Plumber | Canada |
| 33 | Ruby J. Mcewan | 35 | Daughter-in-law | — | England |
| 34 | Charles Mcewan | 24 | Son | — | Canada |
| 35 | Marjorie G. Mcewan | 31 | Daughter | Beautician | Canada |
| 36 | Mina G. Mcewan | 46 | Daughter | Adjuster | Canada |
| 37 | Raymond H. Hough | 44 | Head | — | Massachusetts |
| 38 | Louise Hough | 31 | Wife | — | Massachusetts |
| 39 | Helen L. Hough | 16 | Daughter | — | Massachusetts |
| 40 | William C. Hough | 53 | Brother | Operator | Massachusetts |
Pedigree Summary
Katherine + 1 sibling
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)