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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 spouse (b.~1888), then head of a 8-person household.
Age 52
b. ~1888
Female
Spouse
Born: Irish Free State
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Suffolk-County, Massachusetts |
| Surname | Lennon |
| Given Name | Mary A. |
| Relationship to Head | wife |
| Sex | F |
| Color / Race | White |
| Age | 52 |
| Marital Status | Married |
| Birthplace | Irish Free State |
| 1935 Residence (City) | Boston City |
| 1935 Residence (County) | Suffolk |
| Naturalization Status | Naturalized |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birthplace (normalized) | irish free state |
| Township / Ward | Boston City |
| Est. Birth Year | ~1888 |
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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Lennon | Daughter | — | 18 | ~1922 |
| Michael Lennon | Head | — | 54 | ~1886 |
| Mary Lennon | Spouse | — | 52 | ~1888 |
| James Lennon | Son | — | 12 | ~1928 |
| Winifred Lennon | Daughter | — | 28 | ~1912 |
| Theresa Lennon | Daughter | — | 14 | ~1926 |
| Thomas Lennon | Son | — | 19 | ~1921 |
| Joseph Lennon | Son | — | 16 | ~1924 |
Census Appearances
1930
Suffolk, Massachusetts
Other, age 47
Suffolk, Massachusetts · implied b. ~1883 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Lennon |
| Given Name | Mary |
| Relationship to Head | Wife-H |
| Sex | F |
| Color / Race | White |
| Age | 47 |
| Marital Status | Married |
| Birthplace | Irish Free State |
| Naturalization Status | Naturalized |
| Year of Immigration | 1901 |
| Age at First Marriage | 19 |
| Father's Birthplace | Irish Free State |
| Mother's Birthplace | Irish Free State |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Birthplace (normalized) | irish free state |
1940
Suffolk-County, Massachusetts
Spouse, age 52
Suffolk-County, Massachusetts · implied b. ~1888 — 8 household members
| Surname | Lennon |
| Given Name | Mary A. |
| Relationship to Head | wife |
| Sex | F |
| Color / Race | White |
| Age | 52 |
| Marital Status | Married |
| Birthplace | Irish Free State |
| 1935 Residence (City) | Boston City |
| 1935 Residence (County) | Suffolk |
| Naturalization Status | Naturalized |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birthplace (normalized) | irish free state |
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
Spouse · 1940 · age 52 · b. ~1888 · Massachusetts
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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
40 people indexed on this census page (nara:1940:m-t0627-01668-00304)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Margaret S. Chamberlain | 3 | daughter | — | Massachusetts |
| 2 | Joseph A. Jr. Chamberlain | 1 | son | — | Massachusetts |
| 3 | Patrick F. Cronin | 69 | head | — | Irish Free State |
| 4 | Elizabeth M. Cronin | 63 | wife | — | Irish Free State |
| 5 | Marion T. (Al) Cronin | 24 | son | — | Massachusetts |
| 6 | Francis T. Leader | 39 | daughter | Traveling Salesman | Massachusetts |
| 7 | William Leader | 2 | grandson | — | Massachusetts |
| 8 | Henry A. Brawley | 49 | head | Maintenance Man | Massachusetts |
| 9 | Laura Brawley | 48 | wife | — | Massachusetts |
| 10 | Henry A. Brawley | 20 | son | Stationary Engineer | Massachusetts |
| 11 | Roland R. Brawley | 18 | daughter | Switch Board Operator | Massachusetts |
| 12 | George L. Brawley | 10 | son | — | Massachusetts |
| 13 | David Gaffney | 3 | friend | — | Massachusetts |
| 14 | Mary J. Barry | 27 | head | Typist | Massachusetts |
| 15 | Rita C. Barry | 22 | sister | Clerk - Typist | Massachusetts |
| 16 | James J. Barry | 20 | brother | Shipping Clerk | Massachusetts |
| 17 | John (Ab) Barry | 18 | brother | — | Massachusetts |
| 18 | Paul L. Barry | 15 | brother | — | Massachusetts |
| 19 | Edward Woods | 72 | lodger | — | Irish Free State |
| 20 | Margaret Wholey | 78 | head | — | Massachusetts |
| 21 | John F. Wholey | 21 | son | Electrician | Massachusetts |
| 22 | Margaret M. Wholey | 19 | daughter | Senior Typist | Massachusetts |
| 23 | Ann Mccarey | 78 | mother | — | Canada English |
| 24 | Thomas J. Kearns | 34 | lodger | Elevator Operator | Massachusetts |
| 25 | Sarah T. Lamb | 52 | head | — | Massachusetts |
| 26 | John J. Lamb | 59 | brother | Letter Carrier | Massachusetts |
| 27 | William E. Garity | 58 | head | Taxi Agent | Irish Free State |
| 28 | Catherine L. Garity | 58 | wife | — | Massachusetts |
| 29 | Edward J. Garity | 30 | son | Chauffeur | Massachusetts |
| 30 | Marguerite Garity | 24 | daughter | Bookkeeper | Massachusetts |
| 31 | Alice Garity | 19 | daughter | Key Punch Op | Massachusetts |
| 32 | Elizabeth Garity | 16 | daughter | — | Massachusetts |
| 33 | Michael H. Lennon | 54 | head | Boilermaker | Irish Free State |
| 34 | Mary A. Lennon THIS PERSON | 52 | wife | — | Irish Free State |
| 35 | Winifred A. Lennon | 28 | daughter | Filing Clerk | New York |
| 36 | Thomas J. Lennon | 19 | son | Shipping Clerk | Massachusetts |
| 37 | Mary F. Lennon | 18 | daughter | Clerk Shipping | Massachusetts |
| 38 | Joseph M. Lennon | 16 | son | — | Massachusetts |
| 39 | Theresa V. Lennon | 14 | daughter | — | Massachusetts |
| 40 | James F. Lennon | 12 | 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)