ES
Elizabeth Sullivan — 1940 US Census Record
Model Tree available1940 United States Federal Census · New-Castle-County, Delaware
Our Model Tree links this Elizabeth Sullivan across the 1920, 1930 and 1940 US Censuses in New-Castle-County, Delaware (XGBoost, ~Confirmed), with identified parents Nora & Nora — first a daughter (b.~1916), then head of a 2-person household.
Age 24
b. ~1916
Female
Daughter
Born: Delaware
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | New-Castle-County, Delaware |
| Surname | Sullivan |
| Given Name | Elizabeth |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | Delaware |
| 1935 Residence (City) | Wilmington City |
| 1935 Residence (County) | New Castle |
| Additional Details | |
| Occupation | Stenographer |
| Industry | Electric Co |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 700 |
| Highest Grade | C 2 |
| 1935 Residence | Same House |
| Birth State | Delaware |
| Birth Country | United States |
| Birthplace (normalized) | delaware |
| Occupation | Stenographer |
| Township / Ward | Wilmington 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.
2 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Elizabeth | Age | Birth yr |
|---|---|---|---|---|
| Elizabeth Sullivan | Daughter | — | 24 | ~1916 |
| Matthew Sullivan | Head | — | 48 | ~1892 |
Census Appearances
1920
New Castle, …
Daughter, age 3
New Castle, Delaware · implied b. ~1917 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Sullivan |
| Given Name | Elizabeth |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | Delaware |
| Father's Birthplace | Delaware |
| Mother's Birthplace | Pennsylvania |
| Birth State | Delaware |
| Birth Country | United States |
| Birthplace (normalized) | delaware |
1930
New Castle, …
Daughter, age 14
New Castle, Delaware · implied b. ~1916 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Sullivan |
| Given Name | Elizabeth |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Delaware |
| Father's Birthplace | Delaware |
| Mother's Birthplace | Penna |
| Can Read/Write | Yes |
| Birth State | Delaware |
| Birth Country | United States |
| Birthplace (normalized) | delaware |
1940
New-Castle-County, Delaware
Daughter, age 24
New-Castle-County, Delaware · implied b. ~1916 — 2 household members
| Surname | Sullivan |
| Given Name | Elizabeth |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | Delaware |
| 1935 Residence (City) | Wilmington City |
| 1935 Residence (County) | New Castle |
| Occupation | Stenographer |
| Industry | Electric Co |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 700 |
| Highest Grade | C 2 |
| 1935 Residence | Same House |
| Birth State | Delaware |
| Birth Country | United States |
| Birthplace (normalized) | delaware |
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 Elizabeth Sullivan across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Nora Sullivan (~0.84 confidence) and mother Nora Sullivan (~0.84 confidence) and mother Margaret Sullivan (~0.92 confidence) and father Matthew Sullivan (~0.92 confidence). The pedigree spans 2 generations with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.88
Mother
Nora Sullivan
b. ~1851
Source father>mother
● Household
· direct · ~0.84
Mother
Nora Sullivan
b. ~1860
Source father>mother
● Household
· direct · ~0.84
Mother
Margaret Sullivan
b. ~1889
Source mother
● Household
· direct · ~0.92
Father
Matthew Sullivan
b. ~1891
Source father
● Household
· direct · ~0.92
This person
Anchor record
Elizabeth Sullivan
Daughter · 1940 · age 24 · b. ~1916 · Delaware
★ 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 — New-Castle-County, Delaware
Open full size
1940 US Federal Census — New-Castle-County, Delaware
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00552-00049)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Harry Thompson | 46 | Head | Brakeman | Delaware |
| 2 | Ethel Thompson | 48 | Wife | — | Delaware |
| 3 | Ethel C Thompson | 23 | Daughter | Saleslady | Delaware |
| 4 | Edna A Thompson | 20 | Daughter | Waitress | Delaware |
| 5 | Clifford Smith | 42 | Head | Musician | Delaware |
| 6 | Mary Smith | 30 | Wife | — | Delaware |
| 7 | Joan Smith | 10 | Daughter | — | Delaware |
| 8 | Vera Haynes | 26 | Sister-in-law | Waitress | Delaware |
| 9 | Bryan Nickerson | 41 | Head | Butcher | Maryland |
| 10 | Alice Nickerson | 41 | Wife | — | Delaware |
| 11 | Bryan Jr Nickerson | 16 | Son | — | Delaware |
| 12 | Mary Stacher | 65 | Head | — | Delaware |
| 13 | Marjorie Stacher | 40 | Daughter | Inspector | Delaware |
| 14 | Reginald H Fooks | 50 | Lodger | Bricklayer | Canada |
| 15 | Elvira Di Stana | 40 | Head | — | Italy |
| 16 | Rose M Di Stana | 17 | Daughter | New Worker | Delaware |
| 17 | Mary Di Stana | 16 | Daughter | — | Delaware |
| 18 | Matilda Di Stana | 13 | Daughter | — | Delaware |
| 19 | Joseph P Donovan | 46 | Head | Plumber | Delaware |
| 20 | Marie C Donovan | 49 | Wife | — | Delaware |
| 21 | Joseph P Jr Donovan | 17 | Son | — | Delaware |
| 22 | Lillian Montgomery | 29 | Head | — | Delaware |
| 23 | Thomas E Montgomery | 15 | Son | — | Delaware |
| 24 | Edward J Jr Hayden | 35 | Head | Carpenter | Delaware |
| 25 | Edward J Hayden | 60 | Father | — | Delaware |
| 26 | Catherine Maurer | 31 | Housekeeper | — | Illinois |
| 27 | Henry Maurer | 32 | Housekeeper Husband | Foundry Man | Maryland |
| 28 | Beverly Maurer | 9 | Housekeeper Daughter | — | Maryland |
| 29 | Warren Maurer | 3 | Housekeeper Son | — | Maryland |
| 30 | Donald Maurer | 1 | Housekeeper Son | — | Delaware |
| 31 | Elwood Johnson | 23 | Lodger | Orderly | Delaware |
| 32 | Margaret Johnson | 19 | Lodger Wife | — | New Jersey |
| 33 | Lucy Episcopo | 36 | Head | — | Italy |
| 34 | Joseph Episcopo | 17 | Son | New Worker | Delaware |
| 35 | Carlina Episcopo | 14 | Daughter | — | Delaware |
| 36 | Albert Episcopo | 12 | Son | — | Delaware |
| 37 | Grace Episcopo | 9 | Daughter | — | Delaware |
| 38 | Elaine Episcopo | 4 | Daughter | — | Delaware |
| 39 | Matthew Sullivan | 48 | Head | Proprietor | Delaware |
| 40 | Elizabeth Sullivan THIS PERSON | 24 | Daughter | Stenographer | Delaware |
Pedigree Summary
Elizabeth
Gen 1 · 2 parents
~0.92
Gen 2 · 2 grandparents
~0.84
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)