CS
Cornelius Sullivan — 1940 US Census Record
Model Tree available1940 United States Federal Census · New-York-County, New York
Our Model Tree links this Cornelius Sullivan across the 1920, 1930 and 1940 US Censuses in New-York-County, New York (XGBoost, ~Confirmed), with identified parents Abigail & Margaret — first a son (b.~1912), then head of a 6-person household.
Age 28
b. ~1912
Male
Son
Born: New York
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | New-York-County, New York |
| Surname | Sullivan |
| Given Name | Cornelius |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 28 |
| Marital Status | Single |
| Birthplace | New York |
| 1935 Residence (City) | NY City |
| 1935 Residence (County) | New York |
| Additional Details | |
| Occupation | Clerical |
| Class of Worker | PW |
| Hours Worked | 52 |
| Income (1939) | 0 |
| Highest Grade | S 8 |
| 1935 Residence | Same house |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
| Occupation | Clerical |
| Township / Ward | Ny City |
| Est. Birth Year | ~1912 |
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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Cornelius | Age | Birth yr |
|---|---|---|---|---|
| Gloria Sullivan | Son | — | 34 | ~1906 |
| Abigail Sullivan | Head | — | 62 | ~1878 |
| Margaret Sullivan | Daughter | — | 30 | ~1910 |
| Cornelius Sullivan | Son | — | 28 | ~1912 |
| Joseph Sullivan | Son | — | 23 | ~1917 |
| Abigail Sullivan | Daughter | — | 26 | ~1914 |
Census Appearances
1920
New York, …
Son, age 7
New York, New York · implied b. ~1913 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Sullivan |
| Given Name | Cornelius |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 7 |
| Marital Status | Single |
| Birthplace | New York |
| Father's Birthplace | New York |
| Mother's Birthplace | Ireland |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
1930
New York, …
Son, age 18
New York, New York · implied b. ~1912 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Sullivan |
| Given Name | Cornelius |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | New York |
| Age at First Marriage | 7 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | File Clerk |
| Industry | Electric Co |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
1940
New-York-County, New …
Son, age 28
New-York-County, New York · implied b. ~1912 — 6 household members
| Surname | Sullivan |
| Given Name | Cornelius |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 28 |
| Marital Status | Single |
| Birthplace | New York |
| 1935 Residence (City) | NY City |
| 1935 Residence (County) | New York |
| Occupation | Clerical |
| Class of Worker | PW |
| Hours Worked | 52 |
| Income (1939) | 0 |
| Highest Grade | S 8 |
| 1935 Residence | Same house |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
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 Cornelius Sullivan across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Abigail Sullivan (~0.92 confidence) and mother Margaret Sullivan (~0.92 confidence) and mother Nora Sullivan (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Abigail Sullivan
b. ~1878
Source mother
● Household
· direct · ~0.92
Mother
Margaret Sullivan
b. ~1894
Source mother
● Household
· direct · ~0.92
Mother
Nora Sullivan
b. ~1883
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Cornelius Sullivan
Son · 1940 · age 28 · b. ~1912 · New York
★ You are viewing this record
Sibling
Gloria Sullivan
Sibling · 1940 · age 34
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Abigail Sullivan
Sibling · 1940 · age 26
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Sullivan
Sibling · 1940 · age 30
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joseph Sullivan
Sibling · 1940 · age 23
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 — New-York-County, New York
Open full size
1940 US Federal Census — New-York-County, New York
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02676-00223)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Mary Green | 5 | daughter | — | New York |
| 42 | Joseph Green | 4 | son | — | New York |
| 43 | Anna Brady | 37 | Head | — | New York |
| 44 | Mathilda Brady | 7 | daughter | — | New York |
| 45 | Theodore Brady | 6 | son | — | New York |
| 46 | George Mucha | 31 | Head | Waiter | Germany |
| 47 | Erna Mucha | 29 | Wife | — | Germany |
| 48 | Herbert Mucha | 9 | son | — | New York |
| 49 | Robert Mucha | 6 | son | — | New York |
| 50 | James Smith | 22 | Head | Machinist | New York |
| 51 | Katherine Smith | 23 | Wife | — | New York |
| 52 | Jerome Smith | 0 | son | — | New York |
| 53 | Emily Denker | 59 | Head | — | New York |
| 54 | Grace Atkins | 61 | sister | — | New York |
| 55 | John Dore | 39 | Head | Mechanic | Ireland |
| 56 | Frank Dore | 23 | son | Mechanic | New York |
| 57 | Marie Dore | 19 | daughter | — | New York |
| 58 | John Cowman | 60 | Head | Street Fare Cond | Eire |
| 59 | Helen Cowman | 60 | Wife | — | Eire |
| 60 | Sidney Smith | 73 | Head | Machinist | England |
| 61 | Esther Smith | 67 | Wife | — | New York |
| 62 | Joseph Isaacs | 55 | Head | Messenger | New York |
| 63 | Charles Isaacs | 30 | son | New Worker | New York |
| 64 | Abigail Sullivan | 62 | Head | — | Eire |
| 65 | Gloria Sullivan | 34 | son | Clerical | New York |
| 66 | Margaret Sullivan | 30 | daughter | Steno. | New York |
| 67 | Cornelius Sullivan THIS PERSON | 28 | son | Clerical | New York |
| 68 | Abigail Sullivan | 26 | daughter | Steno. | New York |
| 69 | Joseph Sullivan | 23 | son | Counter Man | New York |
| 70 | Emil Filipp | 52 | Head | Watchman | Roumania |
| 71 | Eugenia Filipp | 47 | Wife | — | Roumania |
| 72 | Emil Filipp | 27 | son | Watchman | Roumania |
| 73 | Leslie Filipp | 25 | son | Fireman | Roumania |
| 74 | George Filipp | 18 | son | New Worker | Roumania |
| 75 | Virginia Codera | 75 | Aunt | Cook | Roumania |
| 76 | Nicholas Kokkinakis | 31 | Head | Helper | Italy |
| 77 | Julia Kokkinakis | 25 | Wife | Bookkeeper | New York |
| 78 | Mary Murtagh | 56 | Head | — | Ireland |
| 79 | James Murtagh | 32 | son | Const. Labor | New York |
| 80 | Nick Scandalis | 45 | Head | Waiter | Greece |
Pedigree Summary
Cornelius + 4 siblings
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)