JL
John Lennon — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Middlesex-County, Massachusetts
Our Model Tree links this John Lennon across the 1930 and 1940 US Censuses in Middlesex-County, Massachusetts (XGBoost, ~Confirmed) — first a son (b.~1925), then head of a 7-person household.
Age 15
b. ~1925
Male
Son
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, Massachusetts |
| Surname | Lennon |
| Given Name | John F. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Everett City |
| 1935 Residence (County) | Middlesex |
| Additional Details | |
| Industry | 0 |
| Highest Grade | H 1 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | Everett 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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Mary Lennon | Head | — | 43 | ~1897 |
| Herbert Lennon | Son | — | 17 | ~1923 |
| Line Lennon | Son | — | 11 | ~1929 |
| John Lennon | Son | — | 15 | ~1925 |
| Mary Lennon | Daughter | — | 21 | ~1919 |
| Francis Lennon | Son | — | 13 | ~1927 |
| Edward Lennon | Son | — | 20 | ~1920 |
Census Appearances
1930
Middlesex, Massachusetts
Son, age 5
Middlesex, Massachusetts · implied b. ~1925 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Lemmon |
| Given Name | John W |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Veteran | No |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Middlesex-County, Massachusetts
Son, age 15
Middlesex-County, Massachusetts · implied b. ~1925 — 7 household members
| Surname | Lennon |
| Given Name | John F. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Everett City |
| 1935 Residence (County) | Middlesex |
| Industry | 0 |
| Highest Grade | H 1 |
| 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 Lennon across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Lennon
Son · 1940 · age 15 · b. ~1925 · Massachusetts
★ You are viewing this record
Sibling
Herbert Lennon
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Line Lennon
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Edward Lennon
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Lennon
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Francis Lennon
Sibling · 1940 · age 13
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-t0627-01604-00651)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Charles Arinello | 52 | Head | Caretaker | Italy |
| 42 | Nellie A. Arinello | 46 | Wife | — | Massachusetts |
| 43 | Mary Arinello | 21 | Daughter | Factory | Massachusetts |
| 44 | Florence Arinello | 11 | Daughter | — | Massachusetts |
| 45 | Elaine Arinello | 9 | Daughter | — | Massachusetts |
| 46 | Charles Jr. Arinello | 6 | Son | — | Massachusetts |
| 47 | Michael P. Alves | 25 | Head | Musician | Massachusetts |
| 48 | Loretta Alves | 24 | Wife | Book Binder | Massachusetts |
| 49 | Dominic Lepore | 46 | Head | Factory | Italy |
| 50 | Tessa Lepore | 42 | Wife | Finisher | Italy |
| 51 | Clara Lepore | 19 | Daughter | Examiner | Italy |
| 52 | Elmira Lepore | 16 | Daughter | Pinker | Massachusetts |
| 53 | Esther Lepore | 15 | Daughter | — | Massachusetts |
| 54 | Andrew Caprio | 52 | Head | Laborer | Italy |
| 55 | Carmella Caprio | 47 | Wife | — | Massachusetts |
| 56 | Theresa Caprio | 17 | Daughter | — | Massachusetts |
| 57 | William Halwell | 29 | Head | Mechanic | Massachusetts |
| 58 | Ethel Halwell | 28 | Wife | — | Massachusetts |
| 59 | William Jr. Halwell | 4 | Son | — | Massachusetts |
| 60 | Joan Halwell | 2 | Daughter | — | Massachusetts |
| 61 | Mary E. Lennon | 43 | Head | — | Connecticut |
| 62 | Mary A. Lennon | 21 | Daughter | Clerk | Massachusetts |
| 63 | Edward F. Lennon | 20 | Son | Clerk | Massachusetts |
| 64 | Herbert J. Lennon | 17 | Son | — | Massachusetts |
| 65 | John F. Lennon THIS PERSON | 15 | Son | — | Massachusetts |
| 66 | Francis Lennon | 13 | Son | — | Massachusetts |
| 67 | Line Reserved Lennon | 11 | Son | — | Massachusetts |
| 68 | Augustine Fagan | 40 | Head | Fisherman | Canada-English |
| 69 | Mary Fagan | 34 | Wife | — | Canada-English |
| 70 | Richard Fagan | 12 | Son | — | Massachusetts |
| 71 | Marie Fagan | 9 | Daughter | — | Massachusetts |
| 72 | Margaret Fagan | 8 | Daughter | — | Massachusetts |
| 73 | Norma Fagan | 6 | Daughter | — | Massachusetts |
| 74 | James Fagan | 4 | Son | — | Massachusetts |
| 75 | Lawrence Fagan | 3 | Son | — | Massachusetts |
| 76 | Augustine Fagan | 1 | Son | — | Massachusetts |
| 77 | Edward Hewitt | 52 | Head | Laborer | Massachusetts |
| 78 | Margaret A. Hewitt | 46 | Wife | — | Canada-French |
| 79 | Edward Jr. Hewitt | 25 | Son | Gardner | Massachusetts |
| 80 | Lawrence G. Hewitt | 21 | Son | Salesman | 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)