MA
Mary Armstrong — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Suffolk-County, Massachusetts
Our Model Tree links this Mary Armstrong across the 1930 and 1940 US Censuses in Suffolk-County, Massachusetts (XGBoost, ~Confirmed) — first a daughter (b.~1929), then head of a 10-person household.
Age 11
b. ~1929
Female
Daughter
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Suffolk-County, Massachusetts |
| Surname | Armstrong |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston City |
| 1935 Residence (County) | Suffolk |
| Additional Details | |
| Highest Grade | No 3 |
| 1935 Residence | Same Place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | Boston City |
| Est. Birth Year | ~1929 |
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.
10 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Winifred Armstrong | Daughter | — | 4 | ~1936 |
| Mary Armstrong | Daughter | — | 11 | ~1929 |
| Patricia Armstrong | Daughter | — | 7 | ~1933 |
| Jannette Armstrong | Daughter | — | 2 | ~1938 |
| Margaret Armstrong | Daughter | — | 10 | ~1930 |
| Francis Armstrong | Daughter | — | 3 | ~1937 |
| Gladys Armstrong | Daughter | — | 1 | ~1939 |
| William Armstrong | Head | — | 36 | ~1904 |
| William Armstrong | Son | — | 6 | ~1934 |
| Elsie Armstrong | Spouse | — | 35 | ~1905 |
Census Appearances
1930
Suffolk, Massachusetts
Daughter, age 1
Suffolk, Massachusetts · implied b. ~1929 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Armstrong |
| Given Name | Margaret A. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Suffolk-County, Massachusetts
Daughter, age 11
Suffolk-County, Massachusetts · implied b. ~1929 — 10 household members
| Surname | Armstrong |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston City |
| 1935 Residence (County) | Suffolk |
| Highest Grade | No 3 |
| 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 Armstrong across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Armstrong
Daughter · 1940 · age 11 · b. ~1929 · Massachusetts
★ You are viewing this record
Sibling
Patricia Armstrong
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Francis Armstrong
Sibling · 1940 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Armstrong
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Jannette Armstrong
Sibling · 1940 · age 2
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Gladys Armstrong
Sibling · 1940 · age 1
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Winifred Armstrong
Sibling · 1940 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Armstrong
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
40 people indexed on this census page (nara:1940:m-t0627-01657-00747)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Frank Farrell | 24 | Lodger | Truck Driver | Massachusetts |
| 42 | James Jr Mcmurray | 10 | Lodger | Ground Hand | Massachusetts |
| 43 | Elizabeth Doyle | 57 | Lodger | Cook | Newfoundland |
| 44 | George Clouter | 70 | Lodger | — | Newfoundland |
| 45 | Vincent Bruns | 26 | Lodger | Truck Driver | Massachusetts |
| 46 | Madine Bruns | 26 | Wife | Waitress | Massachusetts |
| 47 | Vincent Ruggerio | 40 | Lodger | Laborer | Italy |
| 48 | Fred Luggere | 30 | Lodger | Seaman | Massachusetts |
| 49 | Joseph S Cann | 59 | Head | Steward | Canada |
| 50 | Sarah A Cann | 60 | Wife | — | Canada |
| 51 | Jessie C Cann | 27 | Son | Electrical Engineer | Massachusetts |
| 52 | Vincenzo Visconte | 69 | Head | — | Italy |
| 53 | Mary Visconte | 82 | Wife | — | Italy |
| 54 | James J Cleary | 55 | Head | Janitor Helper | Massachusetts |
| 55 | Sadie Cleary | 65 | Wife | — | Canada |
| 56 | Helen Drizzell | 52 | Head | — | Massachusetts |
| 57 | Robert D Drizzell | 16 | Son | — | Massachusetts |
| 58 | William Armstrong | 36 | Head | Fisherman | Newfoundland |
| 59 | Elsie Armstrong | 35 | Wife | — | Newfoundland |
| 60 | Mary Armstrong THIS PERSON | 11 | Daughter | — | Massachusetts |
| 61 | Margaret Armstrong | 10 | Daughter | — | Massachusetts |
| 62 | Patricia Armstrong | 7 | Daughter | — | Massachusetts |
| 63 | William Jr Armstrong | 6 | Son | — | Massachusetts |
| 64 | Winifred Armstrong | 4 | Daughter | — | Massachusetts |
| 65 | Francis Armstrong | 3 | Daughter | — | Massachusetts |
| 66 | Jannette Armstrong | 2 | Daughter | — | Massachusetts |
| 67 | Gladys Armstrong | 1 | Daughter | — | Massachusetts |
| 68 | Margaret Dunbar | 32 | Head | — | Maine |
| 69 | Barbara Dunbar | 15 | Daughter | — | Massachusetts |
| 70 | Agnes Dunbar | 14 | Daughter | — | Massachusetts |
| 71 | Lawrence Dunbar | 8 | Son | — | Massachusetts |
| 72 | Helen Dunbar | 5 | Daughter | — | Massachusetts |
| 73 | Suretta Frank Dunbar | 2 | Son | — | Massachusetts |
| 74 | William J Whitton | 68 | Head | Watchman | Massachusetts |
| 75 | Minnie L Whitton | 70 | Wife | — | Canada |
| 76 | Alfred J Whitton | 45 | Son | Watchman | Massachusetts |
| 77 | Frederick W Doucette | 49 | Head | Janitor | Canada |
| 78 | Bertha L Doucette | 29 | Wife | — | Newfoundland |
| 79 | Frederick M Jr Doucette | 23 | Son | Attendant | Massachusetts |
| 80 | Mary Doucette | 20 | Daughter | Buffer | 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)