ML
Mary Lennon — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Suffolk, Massachusetts
Our Model Tree links this Mary Lennon across the 1930 and 1940 US Censuses in Suffolk, Massachusetts (XGBoost, ~Confirmed) — first a daughter (b.~1909), then head of a 7-person household.
Age 21
b. ~1909
Female
Daughter
Born: Massachusetts
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Suffolk, Massachusetts |
| Surname | Lennon |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Irish Free State |
| Mother's Birthplace | Irish Free State |
| Additional Details | |
| Occupation | Salesgirl |
| Industry | Dry Goods |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Salesgirl |
| Township / Ward | City Of Boston |
| Est. Birth Year | ~1909 |
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 1930 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Josephine Lennon | Daughter | — | 17 | ~1913 |
| John Lennon | Son | — | 29 | ~1901 |
| Edward Lennon | Son | — | 19 | ~1911 |
| Mary Lennon | Daughter | — | 21 | ~1909 |
| William Lennon | Son | — | 27 | ~1903 |
| Catherine Lennon | Head | — | 49 | ~1881 |
| Thomas Lennon | Son | — | 24 | ~1906 |
Census Appearances
1930
Suffolk, Massachusetts
Daughter, age 21
Suffolk, Massachusetts · implied b. ~1909 — 7 household members
| Surname | Lennon |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Irish Free State |
| Mother's Birthplace | Irish Free State |
| Occupation | Salesgirl |
| Industry | Dry Goods |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Suffolk-County, Massachusetts
Spouse, age 32
Suffolk-County, Massachusetts · implied b. ~1908 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Lemon |
| Given Name | Mary E. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 32 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston City |
| 1935 Residence (County) | Suffolk |
| Highest Grade | C-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 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 · 1930 · age 21 · b. ~1909 · Massachusetts
★ You are viewing this record
Sibling
William Lennon
Sibling · 1930 · age 27
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Josephine Lennon
Sibling · 1930 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Lennon
Sibling · 1930 · age 29
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas Lennon
Sibling · 1930 · age 24
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Edward Lennon
Sibling · 1930 · age 19
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
1930 US Federal Census — Suffolk, Massachusetts
Open full size
1930 US Federal Census — Suffolk, Massachusetts
Page Contents
50 people indexed on this census page (ia:1930:massachusettscensus00reel943:0264)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Mary Begley | 59 | Head | None | Irish Free State |
| 2 | Mary E Begley | 30 | Daughter | Bookkeeper | Massachusetts |
| 3 | James L Begley | 29 | Son | Clerk | Massachusetts |
| 4 | Hannah M Begley | 27 | Daughter | Stenographer | Massachusetts |
| 5 | Patrick J Byrne | 35 | Head | Machinist | Massachusetts |
| 6 | Catherine Byrne | 34 | Wife | None | Massachusetts |
| 7 | William Byrne | 8 | Son | None | Massachusetts |
| 8 | George Byrne | 6 | Son | None | Massachusetts |
| 9 | Mary Byrne | 4 | Daughter | None | Massachusetts |
| 10 | Patricia Byrne | 2 | Daughter | None | Massachusetts |
| 11 | Margaret Owen | 56 | Head | None | Wales |
| 12 | David J Owen | 31 | Son | Salesman | Massachusetts |
| 13 | Thomas Owen | 27 | Son | Clerk | Massachusetts |
| 14 | Joseph Owen | 25 | Son | Clerk | Massachusetts |
| 15 | Catherine Owen | 19 | Daughter | Clerk | Massachusetts |
| 16 | Mary Owen | 14 | Daughter | Student | Massachusetts |
| 17 | Patrick Flaherty | 65 | Head | Watchman | Irish Free State |
| 18 | Hannah Flaherty | 61 | Wife | None | Irish Free State |
| 19 | Peter Flaherty | 28 | Son | Teller | Massachusetts |
| 20 | Patrick Flaherty | 25 | Son | Manager | Massachusetts |
| 21 | Robert Flaherty | 22 | Son | Battery Man | Massachusetts |
| 22 | Paul Flaherty | 20 | Son | Electrician Helper | Massachusetts |
| 23 | Elizabeth Costello | 55 | Head | None | Massachusetts |
| 24 | John Costello | 52 | Son | Laborer | California |
| 25 | Coleman Gill | 49 | Head | Clerk | Irish Free State |
| 26 | Abbie Gill | 51 | Sister | None | Massachusetts |
| 27 | Catherine Gill | 43 | Sister | Bookkeeper | Massachusetts |
| 28 | Sanford Burke | 61 | Roomer | Piano Hand | Germany |
| 29 | James Quigley | 47 | Head | Fireman | Massachusetts |
| 30 | Lillian Quigley | 41 | Wife | None | Massachusetts |
| 31 | Henry Quigley | 21 | Son | Helper | Massachusetts |
| 32 | Alice Quigley | 3 | Daughter | None | Massachusetts |
| 33 | Florence Driscoll | 46 | Roomer | Fireman | Massachusetts |
| 34 | Catherine Lennon | 49 | Head | None | Irish Free State |
| 35 | John Lennon | 29 | Son | Chauffeur | Massachusetts |
| 36 | William Lennon | 27 | Son | Mechanic | Massachusetts |
| 37 | Thomas Lennon | 24 | Son | Metal Worker | Massachusetts |
| 38 | Mary Lennon THIS PERSON | 21 | Daughter | Salesgirl | Massachusetts |
| 39 | Edward Lennon | 19 | Son | Chauffeur | Massachusetts |
| 40 | Josephine Lennon | 17 | Daughter | Student | Massachusetts |
| 41 | Daniel Barry | 52 | Head | Laborer | Irish Free State |
| 42 | Margaret Barry | 52 | Wife | None | Irish Free State |
| 43 | Catherine Barry | 18 | Daughter | Salesgirl | Massachusetts |
| 44 | Cecilia Barry | 14 | Daughter | Student | Massachusetts |
| 45 | James Mcgrath | 27 | Head | Electrician | Massachusetts |
| 46 | Mary Mcgrath | 25 | Daughter | Salesgirl | Massachusetts |
| 47 | Thomas Maher | 26 | Head | Compositor | Massachusetts |
| 48 | Margaret Maher | 21 | Wife | Operator | Massachusetts |
| 49 | Sarah Miller | 47 | Head | None | Massachusetts |
| 50 | Catherine Kirby | 8 | Daughter | Student | Massachusetts |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1930 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)