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John Mckay — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Hamilton, Ohio
Our Model Tree links this John Mckay across the 1930 and 1940 US Censuses in Hamilton, Ohio (XGBoost, ~Confirmed) — first a son (b.~1915), then head of a 10-person household.
Age 15
b. ~1915
Male
Son
Born: Ohio
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Hamilton, Ohio |
| Surname | McKay |
| Given Name | John H. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Ohio |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Ohio |
| Additional Details | |
| Can Read/Write | Yes |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
| Township / Ward | Cincinnati City |
| 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.
10 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Mary Mckay | Daughter | — | 12 | ~1918 |
| Thomas Mckay | Son | — | 6 | ~1924 |
| Robert Mckay | Son | — | 13 | ~1917 |
| James Mckay | Son | — | 17 | ~1913 |
| Mary Mckay | Other | — | 39 | ~1891 |
| John Mckay | Son | — | 15 | ~1915 |
| George Mckay | Son | — | 3 | ~1927 |
| James Mckay | Head | — | 39 | ~1891 |
| Frances Mckay | Daughter | — | 10 | ~1920 |
| Martha Mckay | Daughter | — | 8 | ~1922 |
Census Appearances
1930
Hamilton, Ohio
Son, age 15
Hamilton, Ohio · implied b. ~1915 — 10 household members
| Surname | McKay |
| Given Name | John H. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Ohio |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Ohio |
| Can Read/Write | Yes |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
1940
Hamilton-County, Ohio
Other, age 25
Hamilton-County, Ohio · implied b. ~1915 — 40 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McCoy |
| Given Name | John |
| Relationship to Head | Attendant |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Married |
| Birthplace | Ohio |
| 1935 Residence (City) | R. |
| 1935 Residence (County) | Clermont |
| Occupation | Attendant |
| Industry | State Hospital |
| Class of Worker | PW |
| Hours Worked | 77 |
| Income (1939) | 580 |
| Highest Grade | H-4 |
| 1935 Residence | Ohio |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
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 Mckay across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Mckay
Son · 1930 · age 15 · b. ~1915 · Ohio
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Sibling
Martha Mckay
Sibling · 1930 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Frances Mckay
Sibling · 1930 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas Mckay
Sibling · 1930 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
George Mckay
Sibling · 1930 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Mckay
Sibling · 1930 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Mckay
Sibling · 1930 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Mckay
Sibling · 1930 · age 12
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 — Hamilton, Ohio
Open full size
1930 US Federal Census — Hamilton, Ohio
Page Contents
50 people indexed on this census page (ia:1930:ohiocensus00reel1813:0731)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | August W. Teppe | 61 | Head | Grocer | Ohio |
| 2 | Josephine R. Teppe | 52 | Wife-H | — | Ohio |
| 3 | Ralph B. Moulton | 34 | Boarder | Carpenter | Illinois |
| 4 | Raymond R. Mills | 51 | Nephew | Truck Driver | Indiana |
| 5 | Nettie Mills | 39 | Niece | — | Ohio |
| 6 | Robert M. Pratts | 50 | Head | Engineer | Indiana |
| 7 | Helen A. Pratts | 49 | Wife-H | — | Iowa |
| 8 | Harry L. Pratts | 24 | Son | Fireman | Ohio |
| 9 | Robert B. Pratts | 21 | Son | Ball Boy | Ohio |
| 10 | James H. Mckay | 39 | Head | Yardmaster | West Virginia |
| 11 | Mary F. Mckay | 39 | Wife-H | — | Ohio |
| 12 | James Jr. Mckay | 17 | Son | Ball Boy | Ohio |
| 13 | John H. Mckay THIS PERSON | 15 | Son | — | Ohio |
| 14 | Robert D. Mckay | 13 | Son | — | Ohio |
| 15 | Mary J. Mckay | 12 | Daughter | — | Ohio |
| 16 | Frances E. Mckay | 10 | Daughter | — | Ohio |
| 17 | Martha J. Mckay | 8 | Daughter | — | Ohio |
| 18 | Thomas E. Mckay | 6 | Son | — | Ohio |
| 19 | George B. Mckay | 3 | Son | — | Ohio |
| 20 | Anna A. Read | 63 | Head-N | — | Ohio |
| 21 | Robert F. Read | 27 | Son | Salesman | Indiana |
| 22 | Alice Dugan | 60 | Sister | Manager | Ohio |
| 23 | Edward N. Hird | 33 | Son-in-law | Salesman | Ohio |
| 24 | Alice A. Hird | 33 | Daughter | — | Ohio |
| 25 | Ruth A. Hird | 5 | Granddaughter | — | Ohio |
| 26 | Leopold Kuenick | 67 | Head | Druggist | Ohio |
| 27 | Sylvia Kuenick | 39 | Wife-H | — | Ohio |
| 28 | Matilda Schuck | 63 | Mother-in-law | — | Ohio |
| 29 | Paul B. Toney | 29 | Head | Fireman | Tennessee |
| 30 | Rose E. Toney | 25 | Wife-H | — | Ohio |
| 31 | Grace B. Toney | 4 | Daughter | — | Ohio |
| 32 | Paul E. Toney | 2 | Son | — | Ohio |
| 33 | Dorothy A. Toney | 1 | Daughter | — | Ohio |
| 34 | Joseph E. Toney | 0 | Son | — | Ohio |
| 35 | William F. Buttman | 54 | Father-in-law | — | Indiana |
| 36 | Ella Buttman | 51 | Mother-in-law | — | Ohio |
| 37 | Stella M. Flannigan | 13 | Adopted Daughter | — | Ohio |
| 38 | Joseph E. Vogt | 21 | Head | Truck Driver | Indiana |
| 39 | Grace M. Vogt | 20 | Wife-H | — | Indiana |
| 40 | Frederick Krebs | 62 | Head | Filling Man | Ohio |
| 41 | Maude Krebs | 54 | Wife-H | — | Indiana |
| 42 | Dorothy B. Krebs | 13 | Daughter | — | Indiana |
| 43 | Arthur G. Kelly | 41 | Head | Salesman | Kentucky |
| 44 | Lucille D. Kelly | 28 | Wife-H | — | Kentucky |
| 45 | Arthur G. Kelly | 10 | Son | — | Ohio |
| 46 | Frances L. Kelly | 13 | Daughter | — | Kentucky |
| 47 | John D. Kelly | 16 | Son | Car Repairer | Kentucky |
| 48 | Eloise Kelly | 18 | Daughter-in-law | — | Kentucky |
| 49 | Henry A. Schaefers | 41 | Head | Blacksmith | Kentucky |
| 50 | Ruth Schaefers | 37 | Wife-H | — | Indiana |
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)