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Cornelius Sullivan — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Norfolk-County, Massachusetts
Our Model Tree links this Cornelius Sullivan across the 1900, 1910, 1920, 1930 and 1940 US Censuses in Norfolk-County, Massachusetts (XGBoost, ~Confirmed) — first a head (b.~1877), then head of a 4-person household.
Age 63
b. ~1877
Male
Head
Born: Ireland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Norfolk-County, Massachusetts |
| Surname | Sullivan |
| Given Name | Cornelius |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 63 |
| Marital Status | Married |
| Birthplace | Ireland |
| 1935 Residence (City) | Weymouth |
| 1935 Residence (County) | Norfolk |
| Naturalization Status | Naturalized |
| Additional Details | |
| Occupation | dockman |
| Industry | Electric Light Co |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1500 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
| Occupation | Dockman |
| Township / Ward | Weymouth |
| Est. Birth Year | ~1877 |
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 |
|---|---|---|---|---|
| Margaret Sullivan | Spouse | — | 63 | ~1877 |
| John Sullivan | Son | — | 30 | ~1910 |
| Cornelius Sullivan | Head | — | 63 | ~1877 |
| Neil Sullivan | Son | — | 32 | ~1908 |
Census Appearances
1900
Suffolk, Massachusetts
Other, age 23
Suffolk, Massachusetts · implied b. ~1877 — 17 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Sullivan |
| Given Name | Cornelius |
| Relationship to Head | Boarder |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Ireland |
| Birth Month | May |
| Birth Year | 1877 |
| Year of Immigration | 1897 |
| Naturalization Status | Alien |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Teamster |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1910
Suffolk, Massachusetts
Other, age 33
Suffolk, Massachusetts · implied b. ~1877 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Sullivan |
| Given Name | Cornelius |
| Relationship to Head | Brother |
| Sex | M |
| Color / Race | White |
| Age | 33 |
| Marital Status | Single |
| Birthplace | Ireland |
| Year of Immigration | 1884 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Teamster |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1920
Suffolk, Massachusetts
Head, age 42
Suffolk, Massachusetts · implied b. ~1878 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Sullivan |
| Given Name | Cornelius |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 42 |
| Marital Status | Married |
| Birthplace | Ireland |
| Naturalization Status | Naturalized |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Laborer |
| Industry | City |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Home Owned/Rented | R |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1930
Suffolk, Massachusetts
Head, age 51
Suffolk, Massachusetts · implied b. ~1879 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Sullivan |
| Given Name | Cornelius |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 51 |
| Marital Status | Married |
| Birthplace | Ireland |
| Naturalization Status | Alien |
| Year of Immigration | 1900 |
| Age at First Marriage | 26 |
| Father's Birthplace | N. Ireland |
| Mother's Birthplace | N. Ireland |
| Occupation | Janitor |
| Industry | Office Bldg |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Home Owned/Rented | O |
| Home Value / Rent | 6500 |
| Radio Set | R |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1940
Norfolk-County, Massachusetts
Head, age 63
Norfolk-County, Massachusetts · implied b. ~1877 — 4 household members
| Surname | Sullivan |
| Given Name | Cornelius |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 63 |
| Marital Status | Married |
| Birthplace | Ireland |
| 1935 Residence (City) | Weymouth |
| 1935 Residence (County) | Norfolk |
| Naturalization Status | Naturalized |
| Occupation | dockman |
| Industry | Electric Light Co |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1500 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
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 5 US Census years (1900, 1910, 1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Cornelius Sullivan
Head · 1940 · age 63 · b. ~1877 · Massachusetts
★ 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 — Norfolk-County, Massachusetts
Open full size
1940 US Federal Census — Norfolk-County, Massachusetts
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01634-00558)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Ellen Allen | 45 | wife | — | Massachusetts |
| 42 | Robert Allen | 25 | son | — | Massachusetts |
| 43 | Robert Allen | 16 | son | — | Massachusetts |
| 44 | Rhoda Allen | 14 | daughter | — | Massachusetts |
| 45 | Daniel Corbett | 72 | Head | — | England |
| 46 | Olive Corbett | 62 | wife | — | England |
| 47 | Eunice Corbett | 41 | daughter | Stitcher | England |
| 48 | Ralph Gourmand | 45 | Head | Boiler Maker | Connecticut |
| 49 | Mabel F Gourmand | 42 | wife | — | New York |
| 50 | Earle S Gourmand | 15 | son | — | Rhode Island |
| 51 | William Bancroft | 36 | Head | Clerk | Massachusetts |
| 52 | Evelyn Bancroft | 36 | wife | — | Maine |
| 53 | Charles Squires | 45 | Head | Electrician | Massachusetts |
| 54 | Helen Squires | 34 | wife | Secretary | Massachusetts |
| 55 | Mabel Smith | 62 | mother in law | — | Massachusetts |
| 56 | Raymond Weeks | 33 | Head | Police Officer | Vermont |
| 57 | Mary Weeks | 33 | wife | — | Massachusetts |
| 58 | Barbara Weeks | 4 | daughter | — | Massachusetts |
| 59 | Marie Basque | 62 | Head | — | France |
| 60 | Louise Basque | 4 | daughter | Fitter | Pennsylvania |
| 61 | B-Car Basque | 55 | brother | Mason | France |
| 62 | Cornelius Sullivan THIS PERSON | 63 | Head | Dockman | Ireland |
| 63 | Margaret Sullivan | 63 | wife | — | Ireland |
| 64 | Neil Sullivan | 32 | son | Meter Reader | Massachusetts |
| 65 | John Sullivan | 30 | son | — | Massachusetts |
| 66 | Roland Belcher | 42 | Head | Machinist | Massachusetts |
| 67 | Martha Belcher | 42 | wife | — | Massachusetts |
| 68 | Robert Saunders | 47 | Head | Mason | Massachusetts |
| 69 | Bertha Saunders | 40 | wife | — | Massachusetts |
| 70 | Dorothy Saunders | 18 | daughter | — | Massachusetts |
| 71 | Bourdoin Smith | 46 | Head | Co-Operator | Massachusetts |
| 72 | Dorothy Smith | 42 | wife | — | Massachusetts |
| 73 | Lillian Rea | 72 | mother in law | — | Massachusetts |
| 74 | Hannah M Smith | 67 | Head | — | Massachusetts |
| 75 | Ralph W Smith | 44 | son | — | Massachusetts |
| 76 | Lydia Helene | 70 | mother | — | Massachusetts |
| 77 | Harold Knight | 36 | Head | Stock Man | Canada |
| 78 | Meta Knight | 35 | wife | — | Canada |
| 79 | Ralph Knight | 15 | son | — | Massachusetts |
| 80 | Margaret Knight | 13 | daughter | — | Massachusetts |
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)