RS
Robert Sullivan — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Middlesex-County, Massachusetts
Our Model Tree links this Robert Sullivan across the 1930 and 1940 US Censuses in Middlesex-County, Massachusetts (XGBoost, ~Confirmed) — first a son (b.~1928), then head of a 13-person household.
Age 12
b. ~1928
Male
Son
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, Massachusetts |
| Surname | Sullivan |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Malden City |
| 1935 Residence (County) | Middlesex |
| Additional Details | |
| Highest Grade | No 5 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | Malden City |
| Est. Birth Year | ~1928 |
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.
13 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Robert | Age | Birth yr |
|---|---|---|---|---|
| Dorothy Sullivan | Daughter | — | 10 | ~1930 |
| Ruth Sullivan | Daughter | — | ~1940 | |
| Bernice Sullivan | Daughter | — | 3 | ~1937 |
| Mary Sullivan | Daughter | — | 8 | ~1932 |
| Mildred Sullivan | Daughter | — | 5 | ~1935 |
| Francis Sullivan | Head | — | 37 | ~1903 |
| William Sullivan | Son | — | 13 | ~1927 |
| James Sullivan | Son | — | 15 | ~1925 |
| Francis Sullivan | Son | — | 9 | ~1931 |
| Philip Sullivan | Son | — | 4 | ~1936 |
| Robert Sullivan | Son | — | 12 | ~1928 |
| John Sullivan | Son | — | 16 | ~1924 |
| Dorothy Sullivan | Spouse | — | 37 | ~1903 |
Census Appearances
1930
Middlesex, Massachusetts
Son, age 2
Middlesex, Massachusetts · implied b. ~1928 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Sullivan |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Rhode Island |
| Occupation | none |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Middlesex-County, Massachusetts
Son, age 12
Middlesex-County, Massachusetts · implied b. ~1928 — 13 household members
| Surname | Sullivan |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Malden City |
| 1935 Residence (County) | Middlesex |
| Highest Grade | No 5 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
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 Robert Sullivan across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Robert Sullivan
Son · 1940 · age 12 · b. ~1928 · Massachusetts
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Sibling
William Sullivan
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ruth Sullivan
Sibling · 1940 · age
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Sullivan
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Bernice Sullivan
Sibling · 1940 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Francis Sullivan
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Dorothy Sullivan
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Sullivan
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Sullivan
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mildred Sullivan
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Philip Sullivan
Sibling · 1940 · age 4
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 — Middlesex-County, Massachusetts
Open full size
1940 US Federal Census — Middlesex-County, Massachusetts
Page Contents
38 people indexed on this census page (nara:1940:m-t0627-01609-00557)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Marie K. Wahl | 29 | Daughter | Cashier | Massachusetts |
| 42 | Rita Wahl | 25 | Daughter | Manager | Massachusetts |
| 43 | Gerard Wahl | 21 | Son | — | Massachusetts |
| 44 | John F. O'Brien | 29 | Head | Bus Driver | Massachusetts |
| 45 | Dorothy O'Brien | 27 | Wife | — | Massachusetts |
| 46 | James O'Brien | 1 | Son | — | Massachusetts |
| 47 | Richard O'Neil | 27 | Brother-in-law | Operator Street Car | Massachusetts |
| 48 | Rita O'Neil | 24 | Sister-in-law | — | Massachusetts |
| 49 | Evelyn O'Neil | 5 | Niece | — | Massachusetts |
| 50 | Harry H. Pillman | 43 | Head | Laborer | Massachusetts |
| 51 | Constance Pillman | 47 | Wife | — | Canada-English |
| 52 | Harry H. Pillman | 22 | Son | Repair Man | Massachusetts |
| 53 | Pearl Pillman | 20 | Daughter | Clerk | Massachusetts |
| 54 | Ruth Pillman | 19 | Daughter | — | Massachusetts |
| 55 | Stanley Pillman | 17 | Son | — | Massachusetts |
| 56 | Francis L. Sullivan | 37 | Head | Salesman | Massachusetts |
| 57 | Dorothy Sullivan | 37 | Wife | — | Massachusetts |
| 58 | John Sullivan | 16 | Son | — | Massachusetts |
| 59 | James Sullivan | 15 | Son | — | Massachusetts |
| 60 | William Sullivan | 13 | Son | — | Massachusetts |
| 61 | Dorothy E. Sullivan | 10 | Daughter | — | Massachusetts |
| 62 | Robert Sullivan THIS PERSON | 12 | Son | — | Massachusetts |
| 63 | Mary Sullivan | 8 | Daughter | — | Massachusetts |
| 64 | Francis L. Jr. Sullivan | 9 | Son | — | Massachusetts |
| 65 | Mildred H. Sullivan | 5 | Daughter | — | Massachusetts |
| 66 | Philip Sullivan | 4 | Son | — | Massachusetts |
| 67 | Bernice Sullivan | 3 | Daughter | — | Massachusetts |
| 68 | Ruth E. Sullivan | 0 | Daughter | — | Massachusetts |
| 71 | Stephen J. Plancovitch | 58 | Head | Blacksmith | Canada-English |
| 72 | Anna Plancovitch | 58 | Wife | — | Canada-English |
| 73 | Richard Kane | 57 | Head | Laborer | Irish Free State |
| 74 | Catherine Kane | 62 | Wife | — | Irish Free State |
| 75 | John De Angelo | 41 | Head | Dental Technician | New York |
| 76 | Louise De Angelo | 40 | Wife | — | Massachusetts |
| 77 | Marie Lombardi | 17 | Niece | — | Massachusetts |
| 78 | Charles Horton | 49 | Head | Shoe-Maker | Massachusetts |
| 79 | Bessie Horton | 52 | Wife | Shoe-Stitcher | Massachusetts |
| 80 | Warren E. Barr | 26 | Head | Machine Operator | Massachusetts |
Related Census Records
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)