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Helen Mcdonald — 1940 US Census Record
Model Tree available1940 United States Federal Census · Middlesex-County, Massachusetts
Our Model Tree links this Helen Mcdonald across the 1910, 1920, 1930 and 1940 US Censuses in Middlesex-County, Massachusetts (XGBoost, ~Confirmed), with identified parents Hugh & Hugh — first a daughter (b.~1899), then head of a 5-person household.
Age 41
b. ~1899
Female
Daughter
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, Massachusetts |
| Surname | McDonald |
| Given Name | Helen |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 41 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Woburn city |
| 1935 Residence (County) | Middlesex |
| Additional Details | |
| Occupation | Stenographer |
| Industry | Insurance |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1400 |
| Highest Grade | H-4 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Stenographer |
| Township / Ward | Woburn City |
| Est. Birth Year | ~1899 |
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 1940 census.
| Name | Relation to head | Relative to Helen | Age | Birth yr |
|---|---|---|---|---|
| Margaret Mcdonald | Head | — | 71 | ~1869 |
| Isabelle Mcdonald | Daughter | — | 42 | ~1898 |
| Mary Mcdonald | Daughter | — | 32 | ~1908 |
| Francis Mcdonald | Son | — | 37 | ~1903 |
| Helen Mcdonald | Daughter | — | 41 | ~1899 |
Census Appearances
1910
Middlesex, Massachusetts
Daughter, age 11
Middlesex, Massachusetts · implied b. ~1899 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McDonald |
| Given Name | Helen |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Canada English |
| Mother's Birthplace | Ireland |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | English |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1920
Middlesex, Massachusetts
Daughter, age 20
Middlesex, Massachusetts · implied b. ~1900 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McDonald |
| Given Name | Helen |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Nova Scotia |
| Mother's Birthplace | Ireland |
| Occupation | Stenographer |
| Industry | Lumber Yard |
| 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 30
Middlesex, Massachusetts · implied b. ~1900 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | MacDonald |
| Given Name | Helen M |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 30 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Nova Scotia |
| Mother's Birthplace | Irish Free State |
| Occupation | Bookkeeper |
| Industry | Insurance |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Middlesex-County, Massachusetts
Daughter, age 41
Middlesex-County, Massachusetts · implied b. ~1899 — 5 household members
| Surname | McDonald |
| Given Name | Helen |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 41 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Woburn city |
| 1935 Residence (County) | Middlesex |
| Occupation | Stenographer |
| Industry | Insurance |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1400 |
| 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 Helen Mcdonald across 4 US Census years (1910, 1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Hugh Macdonald (~0.92 confidence) and father Hugh Mcdonald (~0.92 confidence) and father Joseph Mcdonald (~0.92 confidence) and mother Margaret Mcdonald (~0.92 confidence) and mother Margaret Macdonald (~0.92 confidence) and mother Margaret Mcdonald (~0.92 confidence) and mother Margaret Mcdonald (~0.92 confidence). The pedigree spans 1 generation with 7 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Hugh Macdonald
b. ~1865
Source father
● Household
· direct · ~0.92
Father
Hugh Mcdonald
b. ~1867
Source father
● Household
· direct · ~0.92
Father
Joseph Mcdonald
b. ~1865
Source father
● Household
· direct · ~0.92
Mother
Margaret Mcdonald
b. ~1869
Source mother
● Household
· direct · ~0.92
Mother
Margaret Macdonald
b. ~1869
Source mother
● Household
· direct · ~0.92
Mother
Margaret Mcdonald
b. ~1872
Source mother
● Household
· direct · ~0.92
Mother
Margaret Mcdonald
b. ~1869
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Helen Mcdonald
Daughter · 1940 · age 41 · b. ~1899 · Massachusetts
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Sibling
Isabelle Mcdonald
Sibling · 1940 · age 42
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Mcdonald
Sibling · 1940 · age 32
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Francis Mcdonald
Sibling · 1940 · age 37
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 — Middlesex-County, Massachusetts
Open full size
1940 US Federal Census — Middlesex-County, Massachusetts
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01622-00594)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Margaret Mcdonald | 71 | Head | — | Ireland |
| 2 | Isabelle Mcdonald | 42 | Daughter | Secretary | Massachusetts |
| 3 | Helen Mcdonald THIS PERSON | 41 | Daughter | Stenographer | Massachusetts |
| 4 | Francis Mcdonald | 37 | Son | Clerk | Massachusetts |
| 5 | Mary Mcdonald | 32 | Daughter | Secretary | Massachusetts |
| 6 | John Mcdonald | 35 | Head | Vegetable Dealer | Massachusetts |
| 7 | Rose Mcdonald | 37 | Wife | — | Massachusetts |
| 8 | John Jr. Mcdonald | 6 | Son | — | Massachusetts |
| 9 | Patrick Lulton | 42 | Head | Manager | Ireland |
| 10 | Mary A. Lulton | 36 | Wife | — | Ireland |
| 11 | Phyllis Lulton | 12 | Daughter | — | Massachusetts |
| 12 | Dorothy Lulton | 11 | Daughter | — | Massachusetts |
| 13 | Francis Lulton | 9 | Son | — | Massachusetts |
| 14 | Mary Chase | 19 | Housekeeper | Housekeeper | Massachusetts |
| 15 | Frank Hardy | 56 | Head | Machinist | Massachusetts |
| 16 | Ethel Hardy | 46 | Wife | — | Massachusetts |
| 17 | Ethel J. Hardy | 21 | Daughter | — | Massachusetts |
| 18 | Patrick Hardy | 18 | Daughter | — | Massachusetts |
| 19 | Frank Hardy | 17 | Son | — | Massachusetts |
| 20 | Robert Hardy | 6 | Son | — | Massachusetts |
| 21 | George Tabet | 29 | Head | Clerk | Massachusetts |
| 22 | Flora Tabet | 27 | Wife | — | Rhode Island |
| 23 | Caroline Tabet | 0 | Daughter | — | Massachusetts |
| 24 | Thomas Flaherty | 65 | Head | Watchman | Eire |
| 25 | Catherine Flaherty | 61 | Wife | — | Ireland |
| 26 | Mildred Flaherty | 31 | Daughter | Stenographer | Massachusetts |
| 27 | Ira Pratt | 67 | Head | Carpenter | Maine |
| 28 | Mary Pratt | 64 | Wife | — | Maine |
| 29 | George Berger | 37 | Head | Salesman | Massachusetts |
| 30 | Pauline Berger | 37 | Wife | — | New Hampshire |
| 31 | Patricia Berger | 13 | Daughter | — | New Hampshire |
| 32 | Elizabeth Berger | 8 | Daughter | — | New Hampshire |
| 33 | Susan Mcdonough | 57 | Head | — | Massachusetts |
| 34 | Eleanor Mcdonough | 29 | Daughter | Stenographer | Massachusetts |
| 35 | Susan J. Mcdonough | 22 | Daughter | Clerk | Massachusetts |
| 36 | John O'Connor | 27 | Head | Staker | Massachusetts |
| 37 | Anna E. O'Connor | 23 | Wife | — | Massachusetts |
| 38 | John O'Connor | 7 | Son | — | Massachusetts |
| 39 | Charles O'Connor | 5 | Son | — | Massachusetts |
| 40 | Catherine O'Connor | 4 | Daughter | — | Massachusetts |
Pedigree Summary
Helen + 3 siblings
Gen 1 · 7 parents
~0.92
Max depth 4 (1900–1950 window)
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)