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Mary Lennon — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Suffolk-County, Massachusetts
Our Model Tree links this Mary Lennon across the 1930 and 1940 US Censuses in Suffolk-County, Massachusetts (XGBoost, ~Confirmed) — first a daughter (b.~1926), then head of a 9-person household.
Age 14
b. ~1926
Female
Daughter
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Suffolk-County, Massachusetts |
| Surname | Lennon |
| Given Name | Mary E |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston City |
| 1935 Residence (County) | Suffolk |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | 8 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | Boston City |
| Est. Birth Year | ~1926 |
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 Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Lennon | Daughter | — | 14 | ~1926 |
| Alfred Lennon | Son | — | 16 | ~1924 |
| Thomas Lennon | Son | — | 8 | ~1932 |
| Robert Lennon | Son | — | 11 | ~1929 |
| William Lennon | Son | — | 6 | ~1934 |
| John Lennon | Son | — | 18 | ~1922 |
| Mary Lennon | Spouse | — | 41 | ~1899 |
| John Lennon | Head | — | 44 | ~1896 |
| Richard Lennon | Son | — | 3 | ~1937 |
Census Appearances
1930
Suffolk, Massachusetts
Daughter, age 4
Suffolk, Massachusetts · implied b. ~1926 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Lennon |
| Given Name | Mary |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Italy |
| Mother's Birthplace | Italy |
| Occupation | none |
| Can Read/Write | No |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Suffolk-County, Massachusetts
Daughter, age 14
Suffolk-County, Massachusetts · implied b. ~1926 — 9 household members
| Surname | Lennon |
| Given Name | Mary E |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston City |
| 1935 Residence (County) | Suffolk |
| Income (1939) | 0 |
| Highest Grade | 8 |
| 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 Mary Lennon across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Lennon
Daughter · 1940 · age 14 · b. ~1926 · Massachusetts
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Sibling
John Lennon
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Richard Lennon
Sibling · 1940 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Lennon
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Alfred Lennon
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas Lennon
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Lennon
Sibling · 1940 · age 6
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 — Suffolk-County, Massachusetts
Open full size
1940 US Federal Census — Suffolk-County, Massachusetts
Page Contents
38 people indexed on this census page (nara:1940:m-t0627-01672-00066)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Frank Scully | 64 | Head | Mail Clerk | Massachusetts |
| 42 | Annie G Scully | 63 | Wife | — | Canada English |
| 43 | Russell A Scully | 33 | Son | Librarian | Massachusetts |
| 44 | Howard C Scully | 31 | Son | Insurance Clerk | Massachusetts |
| 45 | George W Scully | 27 | Son | Salesman | Massachusetts |
| 46 | Dorothy Scully | 22 | Daughter | Stenographer | Massachusetts |
| 47 | Waldo L Jones | 69 | Head | Plumber | Massachusetts |
| 48 | Jennie L Jones | 71 | Wife | — | Maine |
| 49 | John J Vickers | 53 | Head | Technician | Canada English |
| 50 | Dorothy M Vickers | 49 | Wife | — | Canada English |
| 51 | Edith M Vickers | 22 | Daughter | — | New York |
| 52 | John W Vickers | 19 | Son | — | Massachusetts |
| 53 | James J Vickers | 15 | Son | — | Massachusetts |
| 54 | Gerald F Vickers | 12 | Son | — | Massachusetts |
| 55 | Valdemar Peterson | 33 | Cousin | Fisherman | Iceland |
| 56 | Valdemar Peterson | 35 | Cousin | — | Massachusetts |
| 57 | John J Lennon | 44 | Head | Painter Decorator | Massachusetts |
| 58 | Mary D Lennon | 41 | Wife | — | Massachusetts |
| 59 | John J Jr Lennon | 18 | Son | — | Massachusetts |
| 60 | Alfred Lennon | 16 | Son | — | Massachusetts |
| 61 | Mary E Lennon THIS PERSON | 14 | Daughter | — | Massachusetts |
| 62 | Robert O Lennon | 11 | Son | — | Massachusetts |
| 63 | Thomas F Lennon | 8 | Son | — | Massachusetts |
| 64 | William X Lennon | 6 | Son | — | Massachusetts |
| 65 | Richard Lennon | 3 | Son | — | Massachusetts |
| 66 | William J Kelly | 62 | Head | Insurance Agent | Massachusetts |
| 67 | Mildred A Kelly | 54 | Wife | — | Canada English |
| 68 | Mildred A Kelly | 24 | Daughter | — | Massachusetts |
| 69 | Barbara Kelly | 15 | Daughter | — | Massachusetts |
| 70 | Dennis J Manning | 71 | Head | Shipper | Massachusetts |
| 71 | Mary E Manning | 71 | Wife | — | Massachusetts |
| 72 | Alice G Manning | 46 | Daughter | School Teacher | Massachusetts |
| 73 | Alfred J Namery | 57 | Head | Florist | New Hampshire |
| 74 | Emilie E Namery | 58 | Wife | — | Massachusetts |
| 75 | George E Gallagher | 25 | Head | — | Maine |
| 76 | Catherine S Gallagher | 60 | Wife | — | Canada English |
| 77 | Bernard J Gallagher | 34 | Son | Accountant | Massachusetts |
| 78 | Clifton J Fillman | 62 | Boarder | Printer | Canada English |
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)