MS
Mary Sullivan — 1940 US Census Record
Model Tree available1940 United States Federal Census · Jefferson-County, Kentucky
Our Model Tree links this Mary Sullivan across the 1920, 1930 and 1940 US Censuses in Jefferson-County, Kentucky (XGBoost, ~Confirmed), with identified parents William & Walter — first a daughter (b.~1916), then head of a 5-person household.
Age 24
b. ~1916
Female
Daughter
Born: Kentucky
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Jefferson-County, Kentucky |
| Surname | Sullivan |
| Given Name | Mary S. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | Kentucky |
| 1935 Residence (City) | Louisville City |
| 1935 Residence (County) | Jefferson |
| Additional Details | |
| Occupation | Steno. |
| Industry | Post Office |
| Class of Worker | GW |
| Hours Worked | 40 |
| Income (1939) | 697 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same Place |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
| Occupation | Steno. |
| Township / Ward | Louisville City |
| Est. Birth Year | ~1916 |
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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Eleanor Sullivan | Daughter | — | 17 | ~1923 |
| Mary Sullivan | Daughter | — | 24 | ~1916 |
| William Sullivan | Head | — | 56 | ~1884 |
| William Sullivan | Son | — | 22 | ~1918 |
| Irene Sullivan | Spouse | — | 54 | ~1886 |
Census Appearances
1920
Jefferson, Kentucky
Daughter, age 3
Jefferson, Kentucky · implied b. ~1917 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Sullivan |
| Given Name | Mary |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | Kentucky |
| Father's Birthplace | Kentucky |
| Mother's Birthplace | Kentucky |
| Occupation | none |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
1930
Jefferson, Kentucky
Daughter, age 14
Jefferson, Kentucky · implied b. ~1916 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Sullivan |
| Given Name | Mary S. |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 14 |
| Birthplace | Kentucky |
| Father's Birthplace | Kentucky |
| Mother's Birthplace | Kentucky |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
1940
Jefferson-County, Kentucky
Daughter, age 24
Jefferson-County, Kentucky · implied b. ~1916 — 5 household members
| Surname | Sullivan |
| Given Name | Mary S. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | Kentucky |
| 1935 Residence (City) | Louisville City |
| 1935 Residence (County) | Jefferson |
| Occupation | Steno. |
| Industry | Post Office |
| Class of Worker | GW |
| Hours Worked | 40 |
| Income (1939) | 697 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same Place |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
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 Mary Sullivan across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father William Sullivan (~0.92 confidence) and father Walter Sullivan (~0.92 confidence) and father Willie Sullivan (~0.92 confidence) and mother Nellie Sullivan (~0.92 confidence) and mother Irene Sullivan (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
William Sullivan
b. ~1884
Source father
● Household
· direct · ~0.92
Father
Walter Sullivan
b. ~1890
Source father
● Household
· direct · ~0.92
Father
Willie Sullivan
b. ~1884
Source father
● Household
· direct · ~0.92
Mother
Nellie Sullivan
b. ~1892
Source mother
● Household
· direct · ~0.92
Mother
Irene Sullivan
b. ~1886
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Sullivan
Daughter · 1940 · age 24 · b. ~1916 · Kentucky
★ You are viewing this record
Sibling
Eleanor Sullivan
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Sullivan
Sibling · 1940 · age 22
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 — Jefferson-County, Kentucky
Open full size
1940 US Federal Census — Jefferson-County, Kentucky
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01370-00640)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | William P. Sullivan | 56 | Head | Owner | Kentucky |
| 2 | Irene A. Sullivan | 54 | Wife | — | Kentucky |
| 3 | Mary S. Sullivan THIS PERSON | 24 | Daughter | Steno. | Kentucky |
| 4 | William Jr. Sullivan | 22 | Son | — | Tennessee |
| 5 | Eleanor Sullivan | 17 | Daughter | — | Kentucky |
| 6 | Dennis D. Hagan | 57 | Head | Engineer | Kentucky |
| 7 | Elizabeth Hagan | 57 | Wife | — | Kentucky |
| 8 | Mary O'Brien | 41 | Head | Bookkeeper | Kentucky |
| 9 | Gert Werner | 61 | Aunt | Service Man | Kentucky |
| 10 | Rose Werner | 60 | Niece | — | Kentucky |
| 11 | Jack Murphy | 17 | Lodger | Bookkeeper | California |
| 12 | Francis Murphy | 38 | Lodger | — | Kentucky |
| 13 | Elsie M. Orth | 52 | Aunt | Nurse | Kentucky |
| 14 | William J. Swift | 58 | Head | Engineer | Kentucky |
| 15 | Anna Swift | 58 | Wife | — | Kentucky |
| 16 | George Tomback | 15 | Grandson | — | Kentucky |
| 17 | Billy Tomback | 12 | Grandson | — | Kentucky |
| 18 | Richard Tomback | 12 | Grandson | — | Kentucky |
| 19 | Gwynne C. Bush | 67 | Head | — | Kentucky |
| 20 | Mary Bush | 51 | Wife | — | Kentucky |
| 21 | Joseph T. Cain | 57 | Brother-in-law | Switchman | Kentucky |
| 22 | William Starck | 66 | Head | Conductor | Kentucky |
| 23 | Annie E. Starck | 60 | Wife | — | Kentucky |
| 24 | Annie C. Starck | 25 | Daughter | — | Kentucky |
| 25 | Herman Devers | 28 | Head | Helper | Kentucky |
| 26 | Clara Devers | 27 | Wife | — | Kentucky |
| 27 | Anna Heyna | 65 | Head | — | Germany |
| 28 | Jewell Earl | 29 | Mother-in-law | Laborer | Kentucky |
| 29 | Jewell Earl | 33 | Lodger | Helper | Kentucky |
| 30 | William F. Sanders | 48 | Lodger | Machinist | Indiana |
| 31 | James Bradford | 43 | Lodger | Carman | Tennessee |
| 32 | Flora Notasinger | 29 | Head | — | Kentucky |
| 33 | Edward Montgomery | 25 | Grandson | Scientist | Kentucky |
| 34 | Charles G. Helmrich | 31 | Head | Salesman | Indiana |
| 35 | Minnie Helmrich | 27 | Wife | Operator | Kentucky |
| 36 | Clinton Otey | 35 | Head | Clerk | Kentucky |
| 37 | Ruth Otey | 30 | Wife | — | Kentucky |
| 38 | Robert L. Thomas | 40 | Head | Finisher | Kentucky |
| 39 | Catherine Thomas | 39 | Wife | — | Kentucky |
| 40 | Rosa E. Rautenbush | 64 | Head | — | Kentucky |
Pedigree Summary
Mary + 2 siblings
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)