CS
Cornelius Sullivan — 1940 US Census Record
Model Tree available1940 United States Federal Census · Chemung-County, New York
Our Model Tree links this Cornelius Sullivan across the 1920, 1930 and 1940 US Censuses in Chemung-County, New York (XGBoost, ~Confirmed), with identified parents Joseph & Mary — first a head (b.~1901), then head of a 5-person household.
Age 39
b. ~1901
Male
Head
Born: New York
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Chemung-County, New York |
| Surname | Sullivan |
| Given Name | Cornelius |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 39 |
| Marital Status | Married |
| Birthplace | New York |
| 1935 Residence (City) | Elmira |
| 1935 Residence (County) | Chemung |
| Additional Details | |
| Occupation | Postal Clerk |
| Industry | Post Office |
| Class of Worker | GW |
| Hours Worked | 40 |
| Income (1939) | 2100 |
| Highest Grade | No C 1 |
| 1935 Residence | Same House |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
| Occupation | Postal Clerk |
| Township / Ward | Elmira |
| Est. Birth Year | ~1901 |
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 Cornelius | Age | Birth yr |
|---|---|---|---|---|
| Mary Sullivan | Daughter | — | 14 | ~1926 |
| Catherine Sullivan | Spouse | — | 37 | ~1903 |
| Elizabeth Sullivan | Daughter | — | 12 | ~1928 |
| Catherine Sullivan | Daughter | — | 12 | ~1928 |
| Cornelius Sullivan | Head | — | 39 | ~1901 |
Census Appearances
1920
Chemung, New …
Son, age 19
Chemung, New York · implied b. ~1901 — 13 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Sullivan |
| Given Name | Cornelius |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | New York |
| Father's Birthplace | New York |
| Mother's Birthplace | New York |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
1930
Chemung, New …
Head, age 29
Chemung, New York · implied b. ~1901 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Sullivan |
| Given Name | Cornelius |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 29 |
| Marital Status | Married |
| Birthplace | New York |
| Age at First Marriage | 23 |
| Father's Birthplace | New York |
| Mother's Birthplace | New York |
| Occupation | Mail Clerk |
| Industry | Post Office |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Home Value / Rent | 5000 |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
1940
Chemung-County, New …
Head, age 39
Chemung-County, New York · implied b. ~1901 — 5 household members
| Surname | Sullivan |
| Given Name | Cornelius |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 39 |
| Marital Status | Married |
| Birthplace | New York |
| 1935 Residence (City) | Elmira |
| 1935 Residence (County) | Chemung |
| Occupation | Postal Clerk |
| Industry | Post Office |
| Class of Worker | GW |
| Hours Worked | 40 |
| Income (1939) | 2100 |
| Highest Grade | No C 1 |
| 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: father Joseph Sullivan (~0.92 confidence) and mother Mary Sullivan (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Joseph Sullivan
b. ~1873
Source father
● Household
· direct · ~0.92
Mother
Mary Sullivan
b. ~1875
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Cornelius Sullivan
Head · 1940 · age 39 · b. ~1901 · 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 — Chemung-County, New York
Open full size
1940 US Federal Census — Chemung-County, New York
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02514-00317)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Frances Morgan | 9 | Daughter | — | New York |
| 42 | Robert Morgan | 6 | Son | — | New York |
| 43 | Joseph Connolly | 50 | Brother-in-law | Laborer | Penn |
| 44 | Lee H Barrett | 76 | Head | — | Penn |
| 45 | Grace Barrett | 68 | Wife | — | Penn |
| 46 | George Mellen | 64 | Head | Mgr Ice Store | Vermont |
| 47 | Zana Mellen | 63 | Wife | — | Penn |
| 48 | Raymond De Kay | 28 | Lodger | Press Man | New York |
| 49 | Zana De Kay | 24 | Lodger | Assembler | New York |
| 50 | Max A Collum | 59 | Head | Carpenter | Penn |
| 51 | Florence Collum | 51 | Wife | — | Penn |
| 52 | Jean Collum | 17 | Daughter | — | Penn |
| 53 | Lynn D Freeman | 25 | Son-in-law | Salesman | New York |
| 54 | M. Arlene Freeman | 25 | Daughter | — | Penn |
| 55 | Donald Duffie | 25 | Head | Truck Driver | Penn |
| 56 | Beatrice Duffie | 25 | Wife | — | Penn |
| 57 | Gail Duffie | 1 | Daughter | — | Virginia |
| 58 | Wade Heiskell | 39 | Head | Manager Branch Tea Co | W. Virginia |
| 59 | Fay Heiskell | 38 | Wife | — | Virginia |
| 60 | Rosemary Heiskell | 13 | Daughter | — | W. Virginia |
| 61 | Earl Heiskell | 12 | Son | — | W. Virginia |
| 62 | Glenn Heiskell | 10 | Son | — | W. Virginia |
| 63 | Ida Woughter | 43 | Head | Housekeeper | New York |
| 64 | William Woughter | 17 | Son | — | New York |
| 65 | Jack Woughter | 15 | Son | — | New York |
| 66 | Earl C Woughter | 32 | Son | Laborer | New York |
| 67 | Thelma Woughter | 20 | Daughter-in-law | — | New York |
| 68 | Rollie Burdick | 57 | Head | Signalman | Penn |
| 69 | Loretta Burdick | 58 | Wife | — | New York |
| 70 | Duane Burdick | 25 | Son | Signalman | New York |
| 71 | Marjorie Burdick | 25 | Daughter-in-law | — | New York |
| 72 | Charles Ricker | 52 | Lodger | Miller | New York |
| 73 | Bradley Burdick | 3 | Grandson | — | — |
| 74 | Cornelius Sullivan THIS PERSON | 39 | Head | Postal Clerk | New York |
| 75 | Catherine Sullivan | 37 | Wife | — | New York |
| 76 | Mary C. Sullivan | 14 | Daughter | — | New York |
| 77 | Elizabeth J. Sullivan | 12 | Daughter | — | New York |
| 78 | Catherine L. Sullivan | 12 | Daughter | — | New York |
| 79 | C. W. Bishop | 65 | Head | — | New York |
| 80 | Ida B Bishop | 58 | Wife | — | Penn |
Pedigree Summary
Cornelius
Gen 1 · 2 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)