CS
Cornelius Sullivan — 1940 US Census Record
Model Tree available1940 United States Federal Census · Bronx-County, New York
Our Model Tree links this Cornelius Sullivan across the 1910, 1920, 1930 and 1940 US Censuses in Bronx-County, New York (XGBoost, ~Confirmed), with identified parents John & John — first a head (b.~1908), then head of a 3-person household.
Age 32
b. ~1908
Male
Head
Born: New York
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Bronx-County, New York |
| Surname | Sullivan |
| Given Name | Cornelius |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 32 |
| Marital Status | Married |
| Birthplace | New York |
| 1935 Residence (City) | New York |
| 1935 Residence (County) | Bronx |
| Additional Details | |
| Occupation | Clerk |
| Industry | Insurance Co |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 3600 |
| Highest Grade | H 3 |
| 1935 Residence | New York |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
| Occupation | Clerk |
| Township / Ward | New York |
| Est. Birth Year | ~1908 |
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 Cornelius | Age | Birth yr |
|---|---|---|---|---|
| John Sullivan | Son | — | 4 | ~1936 |
| Marion Sullivan | Spouse | — | 32 | ~1908 |
| Cornelius Sullivan | Head | — | 32 | ~1908 |
Census Appearances
1910
New York, …
Son, age 1
New York, New York · implied b. ~1909 — 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 | 1 |
| Marital Status | Single |
| Birthplace | New York |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | none |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
1920
New York, …
Son, age 12
New York, New York · implied b. ~1908 — 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 | 12 |
| Marital Status | Single |
| Birthplace | New York |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
1930
New York, …
Other, age 22
New York, New York · implied b. ~1908 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Sullivan |
| Given Name | Cornelius |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | New York |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Clerk |
| Industry | Post Office |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
1940
Bronx-County, New …
Head, age 32
Bronx-County, New York · implied b. ~1908 — 3 household members
| Surname | Sullivan |
| Given Name | Cornelius |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 32 |
| Marital Status | Married |
| Birthplace | New York |
| 1935 Residence (City) | New York |
| 1935 Residence (County) | Bronx |
| Occupation | Clerk |
| Industry | Insurance Co |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 3600 |
| Highest Grade | H 3 |
| 1935 Residence | New York |
| 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 4 US Census years (1910, 1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father John Sullivan (~0.92 confidence) and father John Sullivan (~0.92 confidence) and mother Mary Sullivan (~0.92 confidence) and mother Nora Sullivan (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
John Sullivan
b. ~1870
Source father
● Household
· direct · ~0.92
Father
John Sullivan
b. ~1872
Source father
● Household
· direct · ~0.92
Mother
Mary Sullivan
b. ~1880
Source mother
● Household
· direct · ~0.92
Mother
Nora Sullivan
b. ~1870
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Cornelius Sullivan
Head · 1940 · age 32 · b. ~1908 · New York
★ 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 — Bronx-County, New York
Open full size
1940 US Federal Census — Bronx-County, New York
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02495-00904)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Hilda Lomberg | 15 | Daughter | — | Germany |
| 42 | Cornelius Mahoney | 36 | Head | Pressman | New York |
| 43 | Marion Mahoney | 36 | Wife | — | New York |
| 44 | Geraldine Mahoney | 10 | Daughter | — | New York |
| 45 | Mary Doran | 69 | Head | — | Rhode Island |
| 46 | Agnes Doran | 43 | Daughter | Bookkeeper | New York |
| 47 | Marguerite Doran | 41 | Daughter | Secretary | New York |
| 48 | James Doran | 35 | Son | Clerk | New York |
| 49 | Edward F. Ivers | 42 | Head | Mechanic | New York |
| 50 | Ann R. Ivers | 40 | Wife | — | Eire |
| 51 | Frank Galiani | 34 | Head | Supervisor | New Jersey |
| 52 | Anne D. Galiani | 31 | Wife | — | New Jersey |
| 53 | Frank Jr. Galiani | 5 | Son | — | New Jersey |
| 54 | Carolyn Galiani | 1 | Daughter | — | New Jersey |
| 55 | Agnata Johnson | 42 | Head | Bookkeeper | New York |
| 56 | Anna Johnson | 41 | Wife | Bookkeeper | New York |
| 57 | Mary Tracht | 67 | Mother-in-law | — | New York |
| 58 | Charles J. Rundon | 34 | Head | Clerk | Connecticut |
| 59 | Julia Rundon | 31 | Wife | Representative | New York |
| 60 | Charles Rundon | 1 | Son | — | New York |
| 61 | Walter Bensel | 55 | Head | Plumber | New York |
| 62 | Mary Bensel | 50 | Wife | — | New York |
| 63 | Clara Loomis | 74 | Head | — | New York |
| 64 | Katherine Loomis | 51 | Daughter | — | New York |
| 65 | Mary Loomis | 50 | Daughter | Stenog Operator | New York |
| 66 | Margaret Donohue | 50 | Cousin | Clerk | New York |
| 67 | John F. Cummings | 71 | Head | — | New York |
| 68 | Catherine Cummings | 69 | Wife | — | New York |
| 69 | Eleynore Cummings | 34 | Daughter | Teacher | New York |
| 70 | Joseph Clark | 42 | Head | Salesman | New York |
| 71 | Margaret Clark | 40 | Wife | Teacher | New York |
| 72 | Eleynore Clark | 3 | Daughter | — | New York |
| 73 | Fred J. Lacker | 66 | Head | Salesman | Maine |
| 74 | Helene Lacker | 58 | Wife | — | New York |
| 75 | Cornelius Sullivan THIS PERSON | 32 | Head | Clerk | New York |
| 76 | Marion Sullivan | 32 | Wife | — | New York |
| 77 | John Sullivan | 4 | Son | — | New York |
| 78 | Emma E. Mckee | 51 | Head | Clerk | New York |
| 79 | Helen T. Campbell | 58 | Sister | — | New York |
| 80 | William J. Donovan | 44 | Head | Traffic Manager | New York |
Pedigree Summary
Cornelius
Gen 1 · 4 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)