DS
Dennis Sullivan — 1940 US Census Record
Model Tree available1940 United States Federal Census · Kings-County, New York
Our Model Tree links this Dennis Sullivan across the 1910, 1920, 1930 and 1940 US Censuses in Kings-County, New York (XGBoost, ~Confirmed), with identified parents John & Timothy — first a head (b.~1904), then head of a 3-person household.
Age 36
b. ~1904
Male
Head
Born: New York
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Kings-County, New York |
| Surname | Sullivan |
| Given Name | Dennis |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 36 |
| Marital Status | Married |
| Birthplace | New York |
| 1935 Residence (City) | Brooklyn Borough |
| 1935 Residence (County) | Kings |
| Additional Details | |
| Occupation | Clerk |
| Industry | Electric |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1800 |
| Highest Grade | 8 |
| 1935 Residence | Same House |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
| Occupation | Clerk |
| Township / Ward | Brooklyn Borough |
| Est. Birth Year | ~1904 |
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 Dennis | Age | Birth yr |
|---|---|---|---|---|
| Maude Sullivan | Daughter | — | 11 | ~1929 |
| Dennis Sullivan | Head | — | 36 | ~1904 |
| Maude Sullivan | Spouse | — | 37 | ~1903 |
Census Appearances
1910
New York, …
Son, age 6
New York, New York · implied b. ~1904 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Sullivan |
| Given Name | Dennis |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 6 |
| Marital Status | Single |
| Birthplace | New York |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
1920
Kings, New …
Son, age 16
Kings, New York · implied b. ~1904 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Sullivan |
| Given Name | Dennis |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | New York |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Clerk |
| Industry | Office |
| Class of Worker | W |
| 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
Kings, New …
Head, age 26
Kings, New York · implied b. ~1904 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Sullivan |
| Given Name | Dennis |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 26 |
| Marital Status | Married |
| Birthplace | New York |
| Age at First Marriage | 23 |
| Father's Birthplace | New York |
| Mother's Birthplace | New York |
| Occupation | Clerk |
| Industry | Elect. |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | Un |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
1940
Kings-County, New …
Head, age 36
Kings-County, New York · implied b. ~1904 — 3 household members
| Surname | Sullivan |
| Given Name | Dennis |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 36 |
| Marital Status | Married |
| Birthplace | New York |
| 1935 Residence (City) | Brooklyn Borough |
| 1935 Residence (County) | Kings |
| Occupation | Clerk |
| Industry | Electric |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1800 |
| Highest Grade | 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 Dennis Sullivan across 4 US Census years (1910, 1920, 1930 and 1940) in 3 locations, using XGBoost record linkage. Identified parents: father John Sullivan (~0.92 confidence) and father Timothy Sullivan (~0.92 confidence) and mother Julia Sullivan (~0.92 confidence) and mother Mary Sullivan (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
John Sullivan
b. ~1873
Source father
● Household
· direct · ~0.92
Father
Timothy Sullivan
b. ~1860
Source father
● Household
· direct · ~0.92
Mother
Julia Sullivan
b. ~1873
Source mother
● Household
· direct · ~0.92
Mother
Mary Sullivan
b. ~1862
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Dennis Sullivan
Head · 1940 · age 36 · b. ~1904 · 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 — Kings-County, New York
Open full size
1940 US Federal Census — Kings-County, New York
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02563-00945)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Morris Schiffman | 35 | Son-in-law | Shipping Clerk | Austria |
| 42 | Jeanne Schiffman | 33 | Daughter | — | New Jersey |
| 43 | Sheldon Schiffman | 8 | Grandson | — | New York |
| 44 | Robert O'Hara | 49 | Head | Motorman | Northern Ireland |
| 45 | Catherine O'Hara | 50 | Wife | — | Ireland |
| 46 | Michael O'Hara | 28 | Son | Clerk | New York |
| 47 | James O'Hara | 26 | Son | Laborer | New York |
| 48 | Robert O'Hara | 22 | Son | Clerk | New York |
| 49 | Genevieve O'Hara | 18 | Daughter | Dancer | New York |
| 50 | Gerard O'Hara | 16 | Son | — | New York |
| 51 | Adrienne O'Hara | 11 | Daughter | Dancer | New York |
| 52 | Margaret Bogue | 66 | Head | Housework | New York |
| 53 | Christopher Bogue | 38 | Son | Chauffeur | New York |
| 54 | Anita Luiner | 64 | Sister | Housework | New York |
| 55 | Frank Colwell | 60 | Head | Superintendent | New York |
| 56 | Peter J. Dowd | 59 | Head | Laborer | Eire |
| 57 | Margaret Dowd | 54 | Wife | — | Eire |
| 58 | Mary C. Dowd | 22 | Daughter | Typist | New York |
| 59 | Marcella M. Dowd | 20 | Daughter | Typist | New York |
| 60 | Marcella Lenahan | 74 | Mother-in-law | — | Eire |
| 61 | Patrick Lenahan | 52 | Bro-in-law | Wood Detail | Eire |
| 62 | James Dwyer | 35 | Head | Sand Hog | Massachusetts |
| 63 | Helen M. Dwyer | 32 | Wife | — | Newfoundland |
| 64 | William Buchholz | 53 | Head | Draftsman | New York |
| 65 | Grace Buchholz | 52 | Wife | — | New York |
| 66 | Theresa Kliendienst | 60 | Lodger | — | New York |
| 67 | Marie Fortini | 56 | Head | — | Italy |
| 68 | Bartolo Fortini | 21 | Son | Laborer | New York |
| 69 | Rose F. Fortini | 19 | Daughter | Cleaner | New York |
| 70 | Onofrio P. Fortini | 30 | Son | Shipping Clerk | New York |
| 71 | Frances Fortini | 28 | Son's Wife | — | New York |
| 72 | Marie Fortini | 4 | Granddaughter | — | New York |
| 73 | Francis Colligan | 54 | Head | Court Attendant | New York |
| 74 | Susan Colligan | 48 | Wife | — | New York |
| 75 | John P. Colligan | 20 | Son | Laboratory Assistant | New York |
| 76 | Dennis Sullivan THIS PERSON | 36 | Head | Clerk | New York |
| 77 | Maude Sullivan | 37 | Wife | — | New York |
| 78 | Maude J. Sullivan | 11 | Daughter | — | New York |
| 79 | William O'Brien | 53 | Head | Teacher | New York |
| 80 | Christine O'Brien | 47 | Wife | — | New York |
Pedigree Summary
Dennis
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)