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John Dennis — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Middlesex-County, Massachusetts
Our Model Tree links this John Dennis across the 1930 and 1940 US Censuses in Middlesex-County, Massachusetts (XGBoost, ~Confirmed) — first a son (b.~1925), then head of a 9-person household.
Age 15
b. ~1925
Male
Son
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, Massachusetts |
| Surname | Dennis |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Somerville City |
| 1935 Residence (County) | Middlesex |
| Additional Details | |
| Class of Worker | 0 |
| Hours Worked | 0 |
| Income (1939) | 0 |
| Highest Grade | Hs 2 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | Somerville City |
| Est. Birth Year | ~1925 |
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.
9 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Nellie Dennis | Spouse | — | 44 | ~1896 |
| Joseph Dennis | Head | — | 47 | ~1893 |
| Helen Dennis | Daughter | — | 8 | ~1932 |
| Walter Dennis | Son | — | 18 | ~1922 |
| William Dennis | Son | — | 10 | ~1930 |
| John Dennis | Son | — | 15 | ~1925 |
| Daniel Dennis | Son | — | 12 | ~1928 |
| Joseph Dennis | Son | — | 18 | ~1922 |
| Mary Dennis | Daughter | — | 19 | ~1921 |
Census Appearances
1930
Middlesex, Massachusetts
Son, age 5
Middlesex, Massachusetts · implied b. ~1925 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Dennis |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Age at First Marriage | No |
| Father's Birthplace | Irish Free State |
| Mother's Birthplace | Irish Free State |
| Can Read/Write | No |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Middlesex-County, Massachusetts
Son, age 15
Middlesex-County, Massachusetts · implied b. ~1925 — 9 household members
| Surname | Dennis |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Somerville City |
| 1935 Residence (County) | Middlesex |
| Class of Worker | 0 |
| Hours Worked | 0 |
| Income (1939) | 0 |
| Highest Grade | Hs 2 |
| 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 John Dennis across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Dennis
Son · 1940 · age 15 · b. ~1925 · Massachusetts
★ You are viewing this record
Sibling
Helen Dennis
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Dennis
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Dennis
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Walter Dennis
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Daniel Dennis
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joseph Dennis
Sibling · 1940 · age 18
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
40 people indexed on this census page (nara:1940:m-t0627-01702-00061)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | William Cowan | 18 | Son | — | Massachusetts |
| 2 | Doris Cowan | 16 | Daughter | — | Massachusetts |
| 3 | Ida Smith | 64 | Mother-in-law | — | Massachusetts |
| 4 | Daniel Malland | 41 | Head | Labourer | Massachusetts |
| 5 | Elizabeth Malland | 42 | Wife | — | Massachusetts |
| 6 | Daniel Malland | 21 | Son | Truck Driver | Massachusetts |
| 7 | Ethel Malland | 20 | Daughter | — | Massachusetts |
| 8 | John Malland | 18 | Son | — | Massachusetts |
| 9 | Doris Malland | 13 | Daughter | — | Massachusetts |
| 10 | Joseph Davideo | 46 | Head | Salesman | Italy |
| 11 | Amelia Davideo | 42 | Wife | — | Italy |
| 12 | Albert Davideo | 13 | Son | — | Massachusetts |
| 13 | Ida Davideo | 11 | Daughter | — | Massachusetts |
| 14 | Fred Davideo | 8 | Son | — | Massachusetts |
| 15 | Uvanta Davideo | 5 | Daughter | — | Massachusetts |
| 16 | Joseph Davideo | 1 | Son | — | Massachusetts |
| 17 | Ralph Welch | 55 | Head | Wood Cutter | Massachusetts |
| 18 | Nellie Welch | 49 | Wife | — | Vermont |
| 19 | Ralph Welch | 26 | Son | Printer | New Hampshire |
| 20 | Helen Welch | 15 | Daughter | — | Massachusetts |
| 21 | Joseph Cary | 30 | Head | Clerk | Massachusetts |
| 22 | Helen Cary | 26 | Wife | — | Massachusetts |
| 23 | Barbara Cary | 2 | Daughter | — | Massachusetts |
| 24 | Joseph Dennis | 47 | Head | Carpenter | Eire |
| 25 | Nellie Dennis | 44 | Wife | — | Eire |
| 26 | Mary Dennis | 19 | Daughter | — | Massachusetts |
| 27 | Walter Dennis | 18 | Son | — | Massachusetts |
| 28 | Joseph Dennis | 18 | Son | — | Massachusetts |
| 29 | John Dennis THIS PERSON | 15 | Son | — | Massachusetts |
| 30 | Daniel Dennis | 12 | Son | — | Massachusetts |
| 31 | William Dennis | 10 | Son | — | Massachusetts |
| 32 | Helen Dennis | 8 | Daughter | — | Massachusetts |
| 33 | James Lombardo | 54 | Head | Bootblack | Italy |
| 34 | Flora Lombardo | 57 | Wife | — | Holland |
| 35 | John Lombardo | 17 | Son | — | Germany |
| 36 | Bessie Lombardo | 15 | Son | — | Massachusetts |
| 37 | Percy Redmond | 36 | Head | Truck Driver | Massachusetts |
| 38 | Lois Redmond | 35 | Wife | — | Massachusetts |
| 39 | Everett Redmond | 10 | Son | — | Massachusetts |
| 40 | Virginia Redmond | 8 | 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)