DS
Dorothy Sullivan — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Brule-County, South Dakota
Our Model Tree links this Dorothy Sullivan across the 1930 and 1940 US Censuses in Brule-County, South Dakota (XGBoost, ~Confirmed) — first a daughter (b.~1926), then head of a 8-person household.
Age 14
b. ~1926
Female
Daughter
Born: South Dakota
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Brule-County, South Dakota |
| Surname | Sullivan |
| Given Name | Dorothy |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | South Dakota |
| 1935 Residence (City) | Willow Lake Twp |
| 1935 Residence (County) | Brule |
| Additional Details | |
| Occupation | 0 |
| Industry | 0 |
| Class of Worker | 0 |
| Income (1939) | 0 |
| Highest Grade | Hs 1 |
| 1935 Residence | Same place |
| Birth State | South Dakota |
| Birth Country | United States |
| Birthplace (normalized) | south dakota |
| Occupation | 0 |
| Township / Ward | Willow Lake Twp |
| Est. Birth Year | ~1926 |
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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Dorothy | Age | Birth yr |
|---|---|---|---|---|
| Loretta Sullivan | Daughter | — | 12 | ~1928 |
| Dorothy Sullivan | Daughter | — | 14 | ~1926 |
| Raymond Sullivan | Son | — | 16 | ~1924 |
| Clumbus Sullivan | Head | — | 43 | ~1897 |
| Agnes Sullivan | Daughter | — | 10 | ~1930 |
| Josephine Sullivan | Spouse | — | 50 | ~1890 |
| Joe Sullivan | Son | — | 21 | ~1919 |
| Lucille Sullivan | Daughter | — | 11 | ~1929 |
Census Appearances
1930
Brule, South …
Daughter, age 5
Brule, South Dakota · implied b. ~1925 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Sullivan |
| Given Name | Dorothy |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | South Dakota |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Birth State | South Dakota |
| Birth Country | United States |
| Birthplace (normalized) | south dakota |
1940
Brule-County, South …
Daughter, age 14
Brule-County, South Dakota · implied b. ~1926 — 8 household members
| Surname | Sullivan |
| Given Name | Dorothy |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | South Dakota |
| 1935 Residence (City) | Willow Lake Twp |
| 1935 Residence (County) | Brule |
| Occupation | 0 |
| Industry | 0 |
| Class of Worker | 0 |
| Income (1939) | 0 |
| Highest Grade | Hs 1 |
| 1935 Residence | Same place |
| Birth State | South Dakota |
| Birth Country | United States |
| Birthplace (normalized) | south dakota |
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 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Dorothy Sullivan
Daughter · 1940 · age 14 · b. ~1926 · South Dakota
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Sibling
Lucille Sullivan
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Raymond Sullivan
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Loretta Sullivan
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joe Sullivan
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Agnes Sullivan
Sibling · 1940 · age 10
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 — Brule-County, South Dakota
Open full size
1940 US Federal Census — Brule-County, South Dakota
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03849-01144)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Minnie Thomsen | 20 | daughter | Teacher | South Dakota |
| 2 | Cecil Thomsen | 32 | Head | Farmer | Kansas |
| 3 | Leola Thomsen | 33 | Wife | 0 | Iowa |
| 4 | Velva Thomsen | 8 | daughter | — | South Dakota |
| 5 | Vivian Thomsen | 6 | daughter | — | South Dakota |
| 6 | Donald Thomsen | 3 | son | — | South Dakota |
| 7 | Elaine Thomsen | 1 | daughter | — | South Dakota |
| 8 | Clifford Hanson | 20 | Head | Farmer | South Dakota |
| 9 | Clumbus Sullivan | 43 | Head | Farmer | Iowa |
| 10 | Josephine Sullivan | 50 | Wife | 0 | Iowa |
| 11 | Joe Sullivan | 21 | son | Farmer | South Dakota |
| 12 | Raymond Sullivan | 16 | son | Farmer | South Dakota |
| 13 | Dorothy Sullivan THIS PERSON | 14 | daughter | 0 | South Dakota |
| 14 | Loretta Sullivan | 12 | daughter | — | South Dakota |
| 15 | Lucille Sullivan | 11 | daughter | — | South Dakota |
| 16 | Agnes Sullivan | 10 | daughter | — | South Dakota |
| 17 | Edward Darmort | 33 | Head | Farmer | South Dakota |
| 18 | Ila Darmort | 31 | Wife | 0 | South Dakota |
| 19 | Lee Darmort | 0 | son | — | South Dakota |
| 20 | Lafus Evenson | 49 | Head | Farmer | Denmark |
| 21 | Anna Evenson | 47 | Wife | 0 | Denmark |
| 22 | John Herman | 68 | Head | Farmer | Illinois |
| 23 | Sara Herman | 66 | Wife | 0 | Iowa |
| 24 | Henry Mordick | 55 | Lodger | Farmer | Germany |
| 25 | Frank Haloubek | 30 | Head | Farmer | South Dakota |
| 26 | Grace Haloubek | 25 | Wife | 0 | South Dakota |
| 27 | Patricia Haloubek | 4 | daughter | — | South Dakota |
| 28 | Lydia Harrington | 43 | Head | Farmer | South Dakota |
| 29 | Lon Mahalic | 21 | Nephew | Farmer | South Dakota |
| 30 | William May | 44 | Head | Farmer | Iowa |
| 31 | William Sr May | 82 | Father | 0 | Germany |
| 32 | Harold Holeman | 38 | Head | Farmer | Iowa |
| 33 | Lillian Holeman | 32 | Wife | 0 | Iowa |
| 34 | William Range | 66 | Lodger | Farmer | Iowa |
| 35 | Warren Cummins | 53 | Head | Farmer | South Dakota |
| 36 | Nora Cummins | 48 | Wife | 0 | Iowa |
| 37 | Mellum Cummins | 24 | son | Farmer | South Dakota |
| 38 | Clarence Salach | 33 | Head | Farmer | South Dakota |
| 39 | Laura Salach | 21 | Wife | 0 | South Dakota |
| 40 | Betty Salach | 3 | daughter | — | South Dakota |
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)