JM
John Mackey — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Middlesex, Massachusetts
Our Model Tree links this John Mackey across the 1930 and 1940 US Censuses in Middlesex, Massachusetts (XGBoost, ~Confirmed) — first a son (b.~1912), then head of a 9-person household.
Age 18
b. ~1912
Male
Son
Born: Massachusetts
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Middlesex, Massachusetts |
| Surname | Mackey |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Vermont |
| Mother's Birthplace | Massachusetts |
| Additional Details | |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | Newton City |
| Est. Birth Year | ~1912 |
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 John | Age | Birth yr |
|---|---|---|---|---|
| Francis Mackey | Son | — | 10 | ~1920 |
| Kathleen Mackey | Daughter | — | 4 | ~1926 |
| Mary Mackey | Daughter | — | 12 | ~1918 |
| Jeremiah Mackey | Head | — | 58 | ~1872 |
| John Mackey | Son | — | 18 | ~1912 |
| Anne Mackey | Daughter | — | 7 | ~1923 |
| Margaret Mackey | Daughter | — | 14 | ~1916 |
| Thomas Mackey | Son | — | 16 | ~1914 |
| Margaret Mackey | Other | — | 45 | ~1885 |
Census Appearances
1930
Middlesex, Massachusetts
Son, age 18
Middlesex, Massachusetts · implied b. ~1912 — 9 household members
| Surname | Mackey |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Vermont |
| Mother's Birthplace | Massachusetts |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Middlesex-County, Massachusetts
Head, age 29
Middlesex-County, Massachusetts · implied b. ~1911 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | MacKay |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 29 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Medford City |
| 1935 Residence (County) | Middlesex |
| Occupation | Mechanic |
| Industry | Street Railway |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1550 |
| Highest Grade | Hs 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 John Mackey across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Mackey
Son · 1930 · age 18 · b. ~1912 · Massachusetts
★ You are viewing this record
Sibling
Thomas Mackey
Sibling · 1930 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Kathleen Mackey
Sibling · 1930 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Mackey
Sibling · 1930 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Francis Mackey
Sibling · 1930 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Mackey
Sibling · 1930 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Anne Mackey
Sibling · 1930 · age 7
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:massachusettscensus00reel927:0017)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Irene P Bird | 20 | Servant | Nursemaid | Maine |
| 2 | Patrick J Maloney | 38 | Head | Manager | Newfoundland |
| 3 | Irene E Maloney | 31 | Wife-H | — | Massachusetts |
| 4 | Mae E Almgren | 50 | Head-H | — | Massachusetts |
| 5 | Robert Whitman | 16 | Boarder | — | Florida |
| 6 | Hattie E Lewis | 34 | Head | President | Maine |
| 7 | Marion Lewis | 29 | Wife-H | — | New York |
| 8 | Peter Lewis | 4 | Son | — | New York |
| 9 | Suzanne Lewis | 2 | Daughter | — | New York |
| 10 | Florence Mcdonald | 22 | Servant | Cook | Canada English |
| 11 | Marie Rivor | 25 | Servant | Nursemaid | France |
| 12 | Herbert S Malvey | 49 | Head | Manager | Massachusetts |
| 13 | Mary S Malvey | 44 | Wife-H | — | Massachusetts |
| 14 | Gertrude Brandon | 29 | Servant | Servant | Massachusetts |
| 15 | Joseph Brandon | 40 | Boarder | Brakeman | Massachusetts |
| 16 | Leo Mayer | 37 | Head | Manufacturer | New Hampshire |
| 17 | Helen Mayer | 30 | Wife | — | Massachusetts |
| 18 | Bertha Mayer | 4 | Daughter | — | Massachusetts |
| 19 | Frances M Mayer | 1 | Daughter | — | Massachusetts |
| 20 | Leo Robt Mayer | 1 | Son | — | Massachusetts |
| 21 | Ellen Driscoll | 20 | Servant | Servant | Irish Free State |
| 22 | Hazel Petrie | 27 | Servant | Nursemaid | Canada English |
| 23 | William J Hillsons | 53 | Head | Purchasing Agent | Pennsylvania |
| 24 | Jessie B Hillsons | 48 | Wife-H | — | Pennsylvania |
| 25 | Robert A Hillsons | 16 | Son | — | Pennsylvania |
| 26 | Charles Pounds | 51 | Head | Longshoreman | Rhode Island |
| 27 | Elsie E Pounds | 31 | Wife-H | — | New York |
| 28 | Ellane Pounds | 4 | Daughter | — | Massachusetts |
| 29 | Mary C Fredbraten | 36 | Servant | Servant | Canada English |
| 30 | Jeremiah J Mackey | 58 | Head | Treasurer | Vermont |
| 31 | Margaret A Mackey | 45 | Wife-H | — | Massachusetts |
| 32 | John Mackey THIS PERSON | 18 | Son | — | Massachusetts |
| 33 | Thomas Mackey | 16 | Son | — | Massachusetts |
| 34 | Margaret Mackey | 14 | Daughter | — | Massachusetts |
| 35 | Mary Mackey | 12 | Daughter | — | Massachusetts |
| 36 | Francis Mackey | 10 | Son | — | Massachusetts |
| 37 | Anne M Mackey | 7 | Daughter | — | Massachusetts |
| 38 | Kathleen Mackey | 4 | Daughter | — | Massachusetts |
| 39 | Herbert L Gallows | 32 | Head | Service Manager | England |
| 40 | Mabel M Gallows | 36 | Wife-H | — | Pennsylvania |
| 41 | Lucetta Gallows | 13 | Daughter | — | Michigan |
| 42 | John Gallows | 9 | Son | — | Ohio |
| 43 | Alden Gallows | 3 | Son | — | Massachusetts |
| 44 | Henry G Brehms | 36 | Head | Proprietor | Germany |
| 45 | Edna Brehms | 27 | Wife-H | Assistant | Rhode Island |
| 46 | Charles Horley | 35 | Head | Accountant | Texas |
| 47 | Mabel V Horley | 23 | Wife-H | — | Illinois |
| 48 | Allan Horley | 4 | Son | — | Texas |
| 49 | Virginia Horley | 16 | Sister | — | Massachusetts |
| 50 | Alexander Kevorkian | 56 | Head | Owner | Armenia |
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)