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Mary Mclean — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Middlesex, Massachusetts
Our Model Tree links this Mary Mclean across the 1930 and 1940 US Censuses in Middlesex, Massachusetts (XGBoost, ~Confirmed) — first a daughter (b.~1915), then head of a 9-person household.
Age 15
b. ~1915
Female
Daughter
Born: Massachusetts
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Middlesex, Massachusetts |
| Surname | McLean |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Nova Scotia |
| Mother's Birthplace | Nova Scotia |
| Additional Details | |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | Belmont Town |
| Est. Birth Year | ~1915 |
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.
9 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Catherine Mclean | Daughter | — | 12 | ~1918 |
| Margaret Mclean | Daughter | — | 14 | ~1916 |
| Mary Mclean | Daughter | — | 15 | ~1915 |
| Esther Mclean | Daughter | — | 10 | ~1920 |
| Nathaniel Mclean | Head | — | 42 | ~1888 |
| Patrick Mclean | Son | — | 6 | ~1924 |
| Matthew Mclean | Son | — | 8 | ~1922 |
| John Mclean | Son | — | 4 | ~1926 |
| Eileen Mclean | Spouse | — | 42 | ~1888 |
Census Appearances
1930
Middlesex, Massachusetts
Daughter, age 15
Middlesex, Massachusetts · implied b. ~1915 — 9 household members
| Surname | McLean |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Nova Scotia |
| Mother's Birthplace | Nova Scotia |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Middlesex-County, Massachusetts
Daughter, age 27
Middlesex-County, Massachusetts · implied b. ~1913 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | MacLean |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 27 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Malden city |
| 1935 Residence (County) | Middlesex |
| Occupation | Stenographer |
| Industry | News paper |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1300 |
| 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 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Mclean
Daughter · 1930 · age 15 · b. ~1915 · Massachusetts
★ You are viewing this record
Sibling
Patrick Mclean
Sibling · 1930 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Mclean
Sibling · 1930 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Mclean
Sibling · 1930 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Catherine Mclean
Sibling · 1930 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Matthew Mclean
Sibling · 1930 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Esther Mclean
Sibling · 1930 · age 10
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 — Middlesex, Massachusetts
Open full size
1930 US Federal Census — Middlesex, Massachusetts
Page Contents
50 people indexed on this census page (ia:1930:massachusettscensus00reel914:0868)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Arthur Hatfield | 16 | Son | None | Massachusetts |
| 2 | Helen Hatfield | 13 | Daughter | None | Massachusetts |
| 3 | Eleanor Hatfield | 11 | Daughter | None | Massachusetts |
| 4 | Richard Hatfield | 10 | Son | None | Massachusetts |
| 5 | Charles Knight | 25 | Head | Carpenter | Massachusetts |
| 6 | Irene Knight | 23 | Wife | None | Massachusetts |
| 7 | Robert Knight | 1 | Son | None | Massachusetts |
| 8 | Nathaniel Mclean | 42 | Head | Motorman | Nova Scotia |
| 9 | Eileen Mclean | 42 | Wife | None | Nova Scotia |
| 10 | Mary Mclean THIS PERSON | 15 | Daughter | None | Massachusetts |
| 11 | Margaret Mclean | 14 | Daughter | None | Massachusetts |
| 12 | Catherine Mclean | 12 | Daughter | None | Massachusetts |
| 13 | Esther Mclean | 10 | Daughter | None | Massachusetts |
| 14 | Matthew Mclean | 8 | Son | None | Massachusetts |
| 15 | Patrick Mclean | 6 | Son | None | Massachusetts |
| 16 | John Mclean | 4 | Son | None | Massachusetts |
| 17 | Marion Snell | 39 | Head | Inspector | Poland |
| 18 | Alice Snell | 8 | Son | None | Ohio |
| 19 | Minnie Snell | 31 | Boarder | Bookkeeper | Connecticut |
| 20 | Charles Kaprielian | 47 | Head | Tailor | Armenia |
| 21 | Mary Kaprielian | 46 | Wife | None | Armenia |
| 22 | Isabelle Kaprielian | 19 | Daughter | None | Massachusetts |
| 23 | Charles Kaprielian | 16 | Son | None | Massachusetts |
| 24 | Pauline Amadoni | 53 | Head | Editor | Armenia |
| 25 | Takouhi Amadoni | 43 | Wife | Dressmaker | Armenia |
| 26 | Anthony Ryan | 40 | Head | Shipper | Ireland |
| 27 | Winifred Ryan | 37 | Wife | None | Massachusetts |
| 28 | Mary Ryan | 11 | Daughter | None | Massachusetts |
| 29 | Pearl Ryan | 9 | Daughter | None | Massachusetts |
| 30 | Lois Ryan | 7 | Daughter | None | Massachusetts |
| 31 | Louise Ryan | 5 | Daughter | None | Massachusetts |
| 32 | Mary E Looney | 56 | Head | None | Canada English |
| 33 | Joseph J Looney | 21 | Son | Chauffeur | Massachusetts |
| 34 | Mary J Looney | 25 | Daughter | Laborer | Massachusetts |
| 35 | Timothy Looney | 75 | Brother | Blacksmith | Canada English |
| 36 | Francis Lane | 46 | Head | Carpenter | England |
| 37 | Emma Lane | 49 | Wife | None | England |
| 38 | George Lane | 70 | Father | None | England |
| 39 | John M Stewart | 40 | Head | Carpenter | Scotland |
| 40 | Jessie Stewart | 40 | Wife | None | Scotland |
| 41 | John M Stewart | 8 | Son | None | Massachusetts |
| 42 | Philip Dunn | 40 | Head | Clerk | Massachusetts |
| 43 | Alice B Dunn | 31 | Wife | None | Maine |
| 44 | Alice Dunn | 14 | Daughter | None | Massachusetts |
| 45 | Ruth Dunn | 11 | Daughter | None | Massachusetts |
| 46 | Phyllis Dunn | 8 | Daughter | None | Massachusetts |
| 47 | Albert Allen | 38 | Head | Mechanic | Massachusetts |
| 48 | Mary E Allen | 37 | Wife | None | Massachusetts |
| 49 | William Allen | 15 | Son | None | Massachusetts |
| 50 | Charles Allen | 5 | Son | None | Massachusetts |
Related Census Records
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)