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John Dennis — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Essex-County, Massachusetts
Our Model Tree links this John Dennis across the 1930 and 1940 US Censuses in Essex-County, Massachusetts (XGBoost, ~Confirmed) — first a son (b.~1917), then head of a 7-person household.
Age 23
b. ~1917
Male
Son
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Essex-County, Massachusetts |
| Surname | Dennis |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Lynn City |
| 1935 Residence (County) | Essex |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | No 6 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | Lynn City |
| Est. Birth Year | ~1917 |
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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Joseph Dennis | Son | — | 25 | ~1915 |
| Joseph Dennis | Head | — | 60 | ~1880 |
| Olive Fenton | Other | — | 18 | ~1922 |
| Mary Dennis | Spouse | — | 60 | ~1880 |
| Thomas Murphy | Other | — | 62 | ~1878 |
| Olive Dennis | Daughter | — | 27 | ~1913 |
| John Dennis | Son | — | 23 | ~1917 |
Census Appearances
1930
Essex, Massachusetts
Other, age 12
Essex, Massachusetts · implied b. ~1918 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Denis |
| Given Name | John |
| Relationship to Head | Nephew |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Canada French |
| Mother's Birthplace | Massachusetts |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Essex-County, Massachusetts
Son, age 23
Essex-County, Massachusetts · implied b. ~1917 — 7 household members
| Surname | Dennis |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Lynn City |
| 1935 Residence (County) | Essex |
| Income (1939) | 0 |
| Highest Grade | No 6 |
| 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 23 · b. ~1917 · Massachusetts
★ You are viewing this record
Sibling
Joseph Dennis
Sibling · 1940 · age 25
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Olive Dennis
Sibling · 1940 · age 27
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 — Essex-County, Massachusetts
Open full size
1940 US Federal Census — Essex-County, Massachusetts
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01696-00507)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Lucile Morin | 68 | Daughter | Housekeeper | Massachusetts |
| 2 | Alfred Morin | 15 | Son | — | Massachusetts |
| 3 | Napoleon Morin | 52 | Son | Sweeper | New Hampshire |
| 4 | Albert Thibodeau | 15 | Lodger | — | Massachusetts |
| 5 | Hattie Holden | 80 | Head | — | New Hampshire |
| 6 | Ethel Hall | 48 | Daughter | — | Massachusetts |
| 7 | Eleanor Hall | 21 | Daughter | Office Clerk | Massachusetts |
| 8 | Dorothy Hall | 17 | Daughter | — | Massachusetts |
| 9 | William H. Clark | 82 | Head | — | Scotland |
| 10 | Caroline Gives | 59 | Housekeeper | Housekeeper | Massachusetts |
| 11 | Joseph Dennis | 60 | Head | Die Setter | Massachusetts |
| 12 | Mary Dennis | 60 | Wife | — | Massachusetts |
| 13 | Joseph Dennis | 25 | Son | Clerk | Massachusetts |
| 14 | Olive M. Dennis | 27 | Daughter | Nurse | Massachusetts |
| 15 | John Dennis THIS PERSON | 23 | Son | — | Massachusetts |
| 16 | Thomas Murphy | 62 | Brother-in-law | — | Massachusetts |
| 17 | Olive E. Fenton | 18 | Niece | — | Massachusetts |
| 18 | Bernard Kerran | 69 | Head | — | Massachusetts |
| 19 | Bridget M. Kerran | 69 | Wife | — | Ireland |
| 20 | Wilfred Laheger | 78 | Head | — | Canada-French |
| 21 | Delma Laheger | 74 | Wife | — | Canada-French |
| 22 | Joseph F. Mcenery | 68 | Head | Stock Clerk | Massachusetts |
| 23 | Mary F. Mcenery | 68 | Wife | — | Massachusetts |
| 24 | Lillian Lewis | 69 | Head | — | New York |
| 25 | Walter Lewis | 72 | Son | Truck Driver | New York |
| 26 | Rosalie Cormier | 70 | Head | — | Canada-French |
| 27 | Louise Cormier | 43 | Daughter | — | Massachusetts |
| 28 | Daniel L. Cox | 52 | Head | Painter | Ohio |
| 29 | Mary A. Cox | 54 | Wife | — | Ohio |
| 30 | Philip Comeau | 57 | Head | Laborer | Canada-French |
| 31 | Caroline Comeau | 55 | Wife | — | Canada-French |
| 32 | Moses B. Clarke | 70 | Head | Pharmacist | Massachusetts |
| 33 | Lydia Clarke | 68 | Wife | — | Massachusetts |
| 34 | Helen L. Clarke | 39 | Daughter | Printer | Massachusetts |
| 35 | Barbara L. Clarke | 20 | Grand-daughter | Asst. Dietician | Massachusetts |
| 36 | Frank Clarke | 18 | Son | — | Massachusetts |
| 37 | Arlene Clarke | 9 | Daughter | — | Massachusetts |
| 38 | Earl Riley | 30 | Head | Bench Worker | Massachusetts |
| 39 | Florence Riley | 26 | Wife | — | Massachusetts |
| 40 | Earl Jr. Riley | 6 | Son | — | 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)