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Mary Mclean — 1940 US Census Record
Model Tree available1940 United States Federal Census · Middlesex-County, Massachusetts
Our Model Tree links this Mary Mclean across the 1920, 1930 and 1940 US Censuses in Middlesex-County, Massachusetts (XGBoost, ~Confirmed), with identified parents Charles & Eva — first a spouse (b.~1909), then head of a 5-person household.
Age 31
b. ~1909
Female
Spouse
Born: Massachusetts
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, Massachusetts |
| Surname | McLean |
| Given Name | Mary A |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 31 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Medford City |
| 1935 Residence (County) | Middlesex |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | Medford City |
| 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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Sheila Mclean | Daughter | — | 3 | ~1937 |
| Patricia Mclean | Daughter | — | ~1940 | |
| Charles Mclean | Head | — | 35 | ~1905 |
| Charles Mclean | Son | — | 5 | ~1935 |
| Mary Mclean | Spouse | — | 31 | ~1909 |
Census Appearances
1920
Middlesex, Massachusetts
Daughter, age 10
Middlesex, Massachusetts · implied b. ~1910 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McLean |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Middlesex, Massachusetts
Daughter, age 20
Middlesex, Massachusetts · implied b. ~1910 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McLean |
| Given Name | Mary E |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Occupation | Housework |
| Industry | Private family |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Middlesex-County, Massachusetts
Spouse, age 31
Middlesex-County, Massachusetts · implied b. ~1909 — 5 household members
| Surname | McLean |
| Given Name | Mary A |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 31 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Medford City |
| 1935 Residence (County) | Middlesex |
| 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 Mclean across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Charles Mclean (~0.92 confidence) and mother Eva Mclean (~0.92 confidence) and father John Mclean (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Charles Mclean
b. ~1883
Source father
● Household
· direct · ~0.92
Mother
Eva Mclean
b. ~1883
Source mother
● Household
· direct · ~0.92
Father
John Mclean
b. ~1887
Source father
● Household
· direct · ~0.92
This person
Anchor record
Mary Mclean
Spouse · 1940 · age 31 · b. ~1909 · Massachusetts
★ You are viewing this record
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-t0627-01612-00251)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Charles D Celeste | 64 | Head | Barber | Italy |
| 2 | Anna E Celeste | 55 | Wife | — | Massachusetts |
| 3 | Charles S Celeste | 23 | Son | Asst Manager | Massachusetts |
| 4 | Anthony R Simeone | 34 | Head | Upstreamer | Italy |
| 5 | Mary V Simeone | 24 | Wife | — | Massachusetts |
| 6 | Robert B Simeone | 4 | Son | — | Rhode Island |
| 7 | Joan M Simeone | 2 | Daughter | — | Massachusetts |
| 8 | Lorraine Louise E Simeone | 23 | Sister | Saleswoman | Massachusetts |
| 9 | Angelo F Piccolo | 47 | Head | Peddler | Massachusetts |
| 10 | Elizabeth L Piccolo | 36 | Wife | — | Massachusetts |
| 11 | Stephen R Piccolo | 15 | Son | — | Massachusetts |
| 12 | Helen C Piccolo | 13 | Daughter | — | Massachusetts |
| 13 | Phillip Tucci | 45 | Head | Peddler | Italy |
| 14 | Lena Tucci | 35 | Wife | — | New York City |
| 15 | Olga Tucci | 12 | Daughter | — | Massachusetts |
| 16 | Albert Tucci | 9 | Son | — | Massachusetts |
| 17 | Richard Tucci | 4 | Son | — | Massachusetts |
| 18 | H Harry West | 53 | Head | Neckwear Maker | Canada |
| 19 | Dorothy E West | 30 | Daughter | Neckwear Maker | Nova Scotia |
| 20 | Joseph Sciascia | 44 | Head | Barber | Italy |
| 21 | Anna Sciascia | 43 | Wife | Stitcher | Italy |
| 22 | Mary Sciascia | 19 | Daughter | Cashier | Massachusetts |
| 23 | Peter Sciascia | 17 | Son | Newsboy | Massachusetts |
| 24 | Anthony Sciascia | 15 | Son | — | Massachusetts |
| 25 | Josephine Sciascia | 10 | Daughter | — | Massachusetts |
| 26 | Charles Mclean | 35 | Head | Foreman | Scotland |
| 27 | Mary A Mclean THIS PERSON | 31 | Wife | — | Massachusetts |
| 28 | Charles L Mclean | 5 | Son | — | Massachusetts |
| 29 | Sheila V Mclean | 3 | Daughter | — | Massachusetts |
| 30 | Patricia A Mclean | 0 | Daughter | — | Massachusetts |
| 31 | Joseph Kingston | 48 | Head | Motorman | Massachusetts |
| 32 | Annie Kingston | 43 | Wife | — | Massachusetts |
| 33 | Joseph A Kingston | 15 | Son | — | Massachusetts |
| 34 | John F Kingston | 12 | Son | — | Massachusetts |
| 35 | Mary E Kingston | 8 | Daughter | — | Massachusetts |
| 36 | Annie T Kingston | 7 | Daughter | — | Massachusetts |
| 37 | Charles H Tuesley | 39 | Head | Messenger | Massachusetts |
| 38 | Ethel A Tuesley | 38 | Wife | — | Vermont |
| 39 | Walter E Tuesley | 28 | Brother-in-law | Clerk | Massachusetts |
| 40 | Elmer A Chase | 35 | Head | Salesman | Massachusetts |
Pedigree Summary
Mary
Gen 1 · 3 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)