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 1920, 1930 and 1940 US Censuses in Bronx-County, New York (XGBoost, ~Confirmed), with identified parents John & John — first a son (b.~1910), then head of a 4-person household.
Age 30
b. ~1910
Male
Son
Born: New York
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Bronx-County, New York |
| Surname | Sullivan |
| Given Name | Cornelius |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 30 |
| Marital Status | Single |
| Birthplace | New York |
| 1935 Residence (City) | New York City |
| 1935 Residence (County) | Bronx |
| Additional Details | |
| Occupation | Bricklayer |
| Industry | Construction |
| Class of Worker | PW |
| Hours Worked | 14 |
| Income (1939) | 1064 |
| Highest Grade | Hs 4 |
| 1935 Residence | New York |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
| Occupation | Bricklayer |
| Township / Ward | New York City |
| Est. Birth Year | ~1910 |
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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Cornelius | Age | Birth yr |
|---|---|---|---|---|
| Cornelius Sullivan | Son | — | 30 | ~1910 |
| John Sullivan | Son | — | 28 | ~1912 |
| John Sullivan | Head | — | 67 | ~1873 |
| Mary Sullivan | Spouse | — | 69 | ~1871 |
Census Appearances
1920
New York, …
Son, age 10
New York, New York · implied b. ~1910 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Sullivan |
| Given Name | Cornelius |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | New York |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | attends school |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
1930
New York, …
Son, age 20
New York, New York · implied b. ~1910 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Sullivan |
| Given Name | Cornelius |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | New York |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Apprentice |
| Industry | V9X1 |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
1940
Bronx-County, New …
Son, age 30
Bronx-County, New York · implied b. ~1910 — 4 household members
| Surname | Sullivan |
| Given Name | Cornelius |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 30 |
| Marital Status | Single |
| Birthplace | New York |
| 1935 Residence (City) | New York City |
| 1935 Residence (County) | Bronx |
| Occupation | Bricklayer |
| Industry | Construction |
| Class of Worker | PW |
| Hours Worked | 14 |
| Income (1939) | 1064 |
| Highest Grade | Hs 4 |
| 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 3 US Census years (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 father John Sullivan (~0.92 confidence) and mother Mary Sullivan (~0.92 confidence) and mother Mary Sullivan (~0.92 confidence) and mother Mary Sullivan (~0.92 confidence). The pedigree spans 1 generation with 6 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
John Sullivan
b. ~1875
Source father
● Household
· direct · ~0.92
Father
John Sullivan
b. ~1874
Source father
● Household
· direct · ~0.92
Father
John Sullivan
b. ~1873
Source father
● Household
· direct · ~0.92
Mother
Mary Sullivan
b. ~1878
Source mother
● Household
· direct · ~0.92
Mother
Mary Sullivan
b. ~1871
Source mother
● Household
· direct · ~0.92
Mother
Mary Sullivan
b. ~1881
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Cornelius Sullivan
Son · 1940 · age 30 · b. ~1910 · New York
★ You are viewing this record
Sibling
John Sullivan
Sibling · 1940 · age 28
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 — 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-t0627-02466-00928)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Joseph Scott | 26 | Son | Generator Tender | Scotland |
| 42 | Thomas Smith | 48 | Boarder | — | Scotland |
| 43 | John Sullivan | 67 | Head | Marble Setter | Eire |
| 44 | Mary Sullivan | 69 | Wife | — | Eire |
| 45 | Cornelius Sullivan THIS PERSON | 30 | Son | Bricklayer | New York |
| 46 | John Sullivan | 28 | Son | Shipping Clerk | New York |
| 47 | Thomas Koyle | 49 | Head | Laborer | New York |
| 48 | Nora Koyle | 51 | Wife | — | New York |
| 49 | Peter Koyle | 23 | Son | Bookkeeper | New York |
| 50 | Frances Koyle | 21 | Daughter | Typist | New York |
| 51 | Thomas Koyle | 19 | Son | School Boy | New York |
| 52 | Theresa Koyle | 16 | Daughter | — | New York |
| 53 | Thomas Kelly | 42 | Head | Chauffeur | Eire |
| 54 | Hannah Kelly | 40 | Wife | — | Eire |
| 55 | Doris Kelly | 13 | Daughter | — | New York |
| 56 | Anne Kelly | 11 | Daughter | — | New York |
| 57 | Marie Kelly | 7 | Daughter | — | New York |
| 58 | Thomas Kelly | 5 | Son | — | New York |
| 59 | Patricia Kelly | 4 | Daughter | — | New York |
| 60 | Jean Mcclure | 54 | Head | — | Scotland |
| 61 | Richard Mcclure | 30 | Son | Porter | New York |
| 62 | James Mcclure | 27 | Son | Errand Boy | New York |
| 63 | Robert Mctaggart | 32 | Boarder | Bell Boy | Scotland |
| 64 | Charles Habermehl | 49 | Head | Steamfitter | New York |
| 65 | Clara Habermehl | 33 | Wife | — | New York |
| 66 | Evelyn Irwin | 18 | Daughter | New Worker | New York |
| 67 | Marion Irwin | 14 | Daughter | — | New York |
| 68 | Patrick Mallory | 44 | Head | Truck Driver | Eire |
| 69 | Mary Mallory | 44 | Wife | — | Eire |
| 70 | Mary Mallory | 17 | Daughter | — | New York |
| 71 | Helen Mallory | 15 | Daughter | — | New York |
| 72 | Florence Mallory | 13 | Daughter | — | New York |
| 73 | Francis Koyle | 42 | Head | Clerk | New York |
| 74 | Katherine Koyle | 36 | Wife | — | New York |
| 75 | Marilyn Koyle | 11 | Daughter | — | New York |
| 76 | Joseph Mueller | 49 | Head | Salesman | New York |
| 77 | Ruth Mueller | 45 | Wife | — | New York |
| 78 | Richard Mueller | 23 | Son | New Worker | New York |
| 79 | Grace Mueller | 22 | Daughter | Saleslady | New York |
| 80 | Jeremiah Bovany | 46 | Head | Guard | Eire |
Pedigree Summary
Cornelius + 1 sibling
Gen 1 · 6 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)