MA
Mary Armstrong — 1920 US Census Record
Model Tree available1920 United States Federal Census · Middlesex, Massachusetts
Our Model Tree links this Mary Armstrong across the 1920, 1930 and 1940 US Censuses in Middlesex, Massachusetts (XGBoost, ~Confirmed), with identified parents Otto — first a daughter (b.~1883), then head of a 5-person household.
Age 37
b. ~1883
Female
Daughter
Born: Massachusetts
Single
1920 Census Record Details
| Census Year | 1920 |
| Location | Middlesex, Massachusetts |
| Surname | Armstrong |
| Given Name | Mary O. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 37 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Sweden |
| Mother's Birthplace | England |
| Additional Details | |
| Occupation | Seamstress |
| Industry | Tailor shop |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Seamstress |
| Township / Ward | Malden City |
| Est. Birth Year | ~1883 |
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.
5 people recorded at the same address in the 1920 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Armstrong | Daughter | — | 37 | ~1883 |
| Otto Armstrong | Head | — | 63 | ~1857 |
| Otto Pembroke | Other | — | 14 | ~1906 |
| Charles Pembroke | Other | — | 16 | ~1904 |
| Margaret Pembroke | Other | — | 46 | ~1874 |
Census Appearances
1920
Middlesex, Massachusetts
Daughter, age 37
Middlesex, Massachusetts · implied b. ~1883 — 5 household members
| Surname | Armstrong |
| Given Name | Mary O. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 37 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Sweden |
| Mother's Birthplace | England |
| Occupation | Seamstress |
| Industry | Tailor shop |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Middlesex, Massachusetts
Daughter, age 44
Middlesex, Massachusetts · implied b. ~1886 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Armstrong |
| Given Name | May E |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 44 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Sweden |
| Mother's Birthplace | England |
| Occupation | Clerk |
| Industry | Tailor Shop |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Middlesex-County, Massachusetts
Spouse, age 54
Middlesex-County, Massachusetts · implied b. ~1886 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Armstrong |
| Given Name | May O. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 54 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Malden City |
| 1935 Residence (County) | Middlesex |
| Occupation | Clerk |
| Industry | Retail Bakery |
| Class of Worker | PW |
| Income (1939) | 0 |
| Highest Grade | H-4 |
| 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 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Otto Armstrong (~0.92 confidence). The pedigree spans 1 generation with 1 identified ancestor.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Otto Armstrong
b. ~1857
Source father
● Household
· direct · ~0.92
This person
Anchor record
Mary Armstrong
Daughter · 1920 · age 37 · b. ~1883 · Massachusetts
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1920 US Federal Census — Middlesex, Massachusetts
Open full size
1920 US Federal Census — Middlesex, Massachusetts
Page Contents
50 people indexed on this census page (ia:1920:14thcensusofpopu713unit:0473)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Dorothy Mullen | 10 | Daughter | — | Massachusetts |
| 52 | Leo Mullen | 9 | Son | — | Massachusetts |
| 53 | Ruth Mullen | 7 | Daughter | — | Massachusetts |
| 54 | Lester Mullen | 5 | Son | — | Massachusetts |
| 55 | Cohan Ida Mullen | 24 | Sister-in-law | Saleslady | Massachusetts |
| 56 | Arthur Mullen | 3 | Nephew | — | Massachusetts |
| 57 | Barnard F. Doris | 38 | Head | Salesman | Massachusetts |
| 58 | Elizabeth A. Doris | 28 | Wife | — | Massachusetts |
| 59 | Dorothy Doris | 6 | Daughter | — | Massachusetts |
| 60 | Margaret Doris | 4 | Daughter | — | Massachusetts |
| 61 | James Doris | 2 | Son | — | Massachusetts |
| 62 | Silas Urahn | 86 | Head | — | Ireland |
| 63 | John H. Urahn | 46 | Son | Clerk | Massachusetts |
| 64 | Lucy M. Urahn | 26 | Daughter | — | Massachusetts |
| 65 | Barnard Swenson | 42 | Head | Instructor | Sweden |
| 66 | Hannah M. Swenson | 45 | Wife | Furrier | Sweden |
| 67 | Ruth M. Swenson | 22 | Daughter | Clerk | Sweden |
| 68 | John A. M. Swenson | 22 | Son | Patternmaker | Sweden |
| 69 | Victor E. Johnson | 77 | Boarder | — | Massachusetts |
| 70 | Erika E. Johnson | 70 | Boarder | — | Massachusetts |
| 71 | Otto B. Armstrong | 63 | Head | Tailor | Sweden |
| 72 | Mary O. Armstrong THIS PERSON | 37 | Daughter | Seamstress | Massachusetts |
| 73 | Margaret Pembroke | 46 | Housekeeper | Housekeeper | New Jersey |
| 74 | Charles R. Pembroke | 16 | Boarder | Leather | Massachusetts |
| 75 | Otto A. Pembroke | 14 | Boarder | — | Massachusetts |
| 76 | Louis Rudofsky | 52 | Head | Painter | Russia |
| 77 | Annie Rudofsky | 40 | Wife | — | Russia |
| 78 | Elizabeth Rudofsky | 19 | Daughter | Stenographer | Russia |
| 79 | Sadie Rudofsky | 11 | Daughter | — | Massachusetts |
| 80 | Samuel S. Rudofsky | 14 | Son | — | Massachusetts |
| 81 | Edward M. Rudofsky | 2 | Son | — | Massachusetts |
| 82 | Lena Rudofsky | 47 | Sister | Finisher | Russia |
| 83 | Frank Mayer | 32 | Head | Tailor | Russia |
| 84 | Bessie S. Mayer | 31 | Wife | — | Russia |
| 85 | Abraham S. Mayer | 12 | Son | — | Massachusetts |
| 86 | Israel Mayer | 10 | Son | Agent | Massachusetts |
| 87 | Harry Hill | 55 | Head | — | Russia |
| 88 | Idelia Hill | 45 | Wife | Stenographer | Russia |
| 89 | Gertrude S. Hill | 22 | Daughter | Stenographer | Massachusetts |
| 90 | Rose S. Hill | 18 | Daughter | — | Massachusetts |
| 91 | Theodore Hill | 15 | Son | — | Massachusetts |
| 92 | Moses L. Hill | 9 | Son | — | Massachusetts |
| 93 | Morris Hill | 54 | Head | Jobber | Russia |
| 94 | Fannie Hill | 51 | Wife | — | Russia |
| 95 | Minney Hill | 23 | Daughter | Clerk | Massachusetts |
| 96 | Gertie Hill | 21 | Daughter | Clerk (B) | Massachusetts |
| 97 | George Hill | 20 | Son | Agent | Massachusetts |
| 98 | Betsy Hill | 17 | Daughter | — | Massachusetts |
| 99 | William Hill | 14 | Son | — | Massachusetts |
| 100 | Jacob Wishnowsky | 52 | Head | Tailor | Russia |
Pedigree Summary
Mary
Gen 1 · 1 parents
~0.92
Max depth 4 (1900–1950 window)
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1920 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)