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Mary Mckay — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Suffolk, Massachusetts
Our Model Tree links this Mary Mckay across the 1930 and 1940 US Censuses in Suffolk, Massachusetts (XGBoost, ~Confirmed) — first a spouse (b.~1903), then head of a 6-person household.
Age 27
b. ~1903
Female
Spouse
Born: Massachusetts
Married
1930 Census Record Details
| Census Year | 1930 |
| Location | Suffolk, Massachusetts |
| Surname | McKay |
| Given Name | Mary A. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 27 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| Age at First Marriage | 20 |
| Father's Birthplace | Irish Free State |
| Mother's Birthplace | Irish Free State |
| Additional Details | |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | Boston |
| Est. Birth Year | ~1903 |
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.
6 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Louis Mckay | Head | — | 31 | ~1899 |
| Florence Mckay | Daughter | — | 3 | ~1927 |
| Louis Mckay | Son | — | 5 | ~1925 |
| Mary Mckay | Daughter | — | ~1930 | |
| Robert Mckay | Son | — | 4 | ~1926 |
| Mary Mckay | Spouse | — | 27 | ~1903 |
Census Appearances
1930
Suffolk, Massachusetts
Spouse, age 27
Suffolk, Massachusetts · implied b. ~1903 — 6 household members
| Surname | McKay |
| Given Name | Mary A. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 27 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| Age at First Marriage | 20 |
| Father's Birthplace | Irish Free State |
| Mother's Birthplace | Irish Free State |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Suffolk-County, Massachusetts
Other, age 37
Suffolk-County, Massachusetts · implied b. ~1903 — 15 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | MacKay |
| Given Name | Mary |
| Relationship to Head | Lodger |
| Sex | F |
| Color / Race | White |
| Age | 37 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston |
| 1935 Residence (County) | Suffolk |
| Occupation | Proofreader |
| Industry | Library Project |
| Class of Worker | GW |
| Hours Worked | 40 |
| Income (1939) | 950 |
| 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 Mckay across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Mary Mckay
Spouse · 1930 · age 27 · b. ~1903 · Massachusetts
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1930 US Federal Census — Suffolk, Massachusetts
Open full size
1930 US Federal Census — Suffolk, Massachusetts
Page Contents
50 people indexed on this census page (ia:1930:massachusettscensus00reel946:1105)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Edward H. Willey | 46 | Head | Druggist | Connecticut |
| 2 | Agnes K. Willey | 44 | Wife | — | Massachusetts |
| 3 | Elizabeth G. Riley | 48 | Head | — | New York |
| 4 | Gertrude V. Miller | 28 | Daughter | Machine Opr. | Massachusetts |
| 5 | Charles H. Boden | 34 | Boarder | Auto Mechanic | Massachusetts |
| 6 | Louis Rossi | 34 | Head | Shoe Maker | Italy |
| 7 | Nancy Rossi | 28 | Wife | — | Massachusetts |
| 8 | John Rossi | 3 | Son | — | Massachusetts |
| 9 | Mary E. Day | 45 | Head | House Keeping | Massachusetts |
| 10 | David J. Haggerty | 73 | Boarder | Retired | Massachusetts |
| 11 | Patrick Ryan | 32 | Boarder | Janitor | Irish Free State |
| 12 | James Ryan | 30 | Boarder | Fireman | Irish Free State |
| 13 | James F. Donovan | 18 | Boarder | Clerk | Massachusetts |
| 14 | Daniel C. Donovan | 21 | Boarder | Machinist | Massachusetts |
| 15 | Dennis Ward | 26 | Boarder | Laborer | Scotland |
| 16 | Bartholomew Walsh | 28 | Boarder | Laborer | Irish Free State |
| 17 | Mary F. Cunningham | 37 | Head | — | New Hampshire |
| 18 | John F. Cunningham | 11 | Son | — | Massachusetts |
| 19 | Joseph Cunningham | 7 | Son | — | Massachusetts |
| 20 | Veronica Cunningham | 4 | Daughter | — | Massachusetts |
| 21 | Joseph Lavo | 68 | Father | Baker | Germany |
| 22 | Mary H. Lavo | 70 | Mother | — | Irish Free State |
| 23 | John Keller | 43 | Head | Baker | Germany |
| 24 | Mary K. Keller | 39 | Wife | — | Massachusetts |
| 25 | Frederick J. Keller | 20 | Son | Shipper | Massachusetts |
| 26 | Margaret M. Keller | 18 | Daughter | — | Massachusetts |
| 27 | William J. Reilly | 38 | Head | Clerk | Massachusetts |
| 28 | Mary A. Reilly | 37 | Wife | — | Massachusetts |
| 29 | Hyman Krause | 51 | Head | Furniture Dealer | Russia |
| 30 | Fanny Krause | 50 | Wife | — | Russia |
| 31 | Rachel Krause | 25 | Daughter | — | Massachusetts |
| 32 | David Krause | 18 | Son | — | Massachusetts |
| 33 | Henry J. Hain | 62 | Head | Boilermaker | Scotland |
| 34 | Ellen M. Lynch | 27 | Wife | — | Massachusetts |
| 35 | Leo E. Lynch | 7 | Grandson | — | Massachusetts |
| 36 | Sing Ang | 42 | Head | Laundry | China |
| 37 | Louis J. Bodair | 33 | Head | Variety Store | Massachusetts |
| 38 | Marion B. Bodair | 23 | Wife | — | Massachusetts |
| 39 | Louis Jr. Bodair | 1 | Son | — | Massachusetts |
| 40 | Louis Mckay | 31 | Head | Chauffeur | Massachusetts |
| 41 | Mary A. Mckay THIS PERSON | 27 | Wife | — | Massachusetts |
| 42 | Louis Jr. Mckay | 5 | Son | — | Massachusetts |
| 43 | Robert G. Mckay | 4 | Son | — | Massachusetts |
| 44 | Florence T. Mckay | 3 | Daughter | — | Massachusetts |
| 45 | Mary L. Mckay | 0 | Daughter | — | Massachusetts |
| 46 | An. Pivounas | 38 | Head | Machinist Helper | Lithuania |
| 47 | Minnie Pivounas | 34 | Wife | — | Lithuania |
| 48 | Antonia Pivounas | 7 | Daughter | — | Massachusetts |
| 49 | Victor Pivounas | 4 | Son | — | Massachusetts |
| 50 | Joseph R. Duran | 25 | Head | Receiving Clerk | Massachusetts |
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)