JM
John Mckenna — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Suffolk-County, Massachusetts
Our Model Tree links this John Mckenna across the 1930 and 1940 US Censuses in Suffolk-County, Massachusetts (XGBoost, ~Confirmed) — first a son (b.~1928), then head of a 12-person household.
Age 12
b. ~1928
Male
Son
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Suffolk-County, Massachusetts |
| Surname | McKenna |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston city |
| 1935 Residence (County) | Suffolk |
| Additional Details | |
| Highest Grade | No 4 |
| 1935 Residence | Same house |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | Boston City |
| Est. Birth Year | ~1928 |
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.
12 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Marguerite Mckenna | Daughter | — | 15 | ~1925 |
| Mary Mckenna | Daughter | — | 19 | ~1921 |
| Patrick Mckenna | Head | — | 53 | ~1887 |
| Cornelius Coakley | Other | — | 53 | ~1887 |
| George Sullivan | Other | — | 51 | ~1889 |
| Frank Mckenna | Son | — | 14 | ~1926 |
| Robert Mckenna | Son | — | 16 | ~1924 |
| James Mckenna | Son | — | 18 | ~1922 |
| John Mckenna | Son | — | 12 | ~1928 |
| William Mckenna | Son | — | 5 | ~1935 |
| Thomas Mckenna | Son | — | 5 | ~1935 |
| Catherine Mckenna | Spouse | — | 38 | ~1902 |
Census Appearances
1930
Suffolk, Massachusetts
Son, age 2
Suffolk, Massachusetts · implied b. ~1928 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McKenna |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Age at First Marriage | 2 |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Maine |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Suffolk-County, Massachusetts
Son, age 12
Suffolk-County, Massachusetts · implied b. ~1928 — 12 household members
| Surname | McKenna |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston city |
| 1935 Residence (County) | Suffolk |
| Highest Grade | No 4 |
| 1935 Residence | Same house |
| 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 Mckenna across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Mckenna
Son · 1940 · age 12 · b. ~1928 · Massachusetts
★ You are viewing this record
Sibling
Thomas Mckenna
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Marguerite Mckenna
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Mckenna
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Frank Mckenna
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Mckenna
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Mckenna
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Mckenna
Sibling · 1940 · age 18
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
1940 US Federal Census — Suffolk-County, Massachusetts
Open full size
1940 US Federal Census — Suffolk-County, Massachusetts
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01663-00154)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Herbert B Cassell | 62 | Roomer | Elevator Operator | Massachusetts |
| 2 | Jean Keating | 59 | Roomer | — | Irish Free State |
| 3 | Margaret A O'Donnell | 69 | Head | — | Irish Free State |
| 4 | John Williams | 48 | Son | Florist Shop | Massachusetts |
| 5 | Thomas Williams | 37 | Son | Theater Cleaner | Massachusetts |
| 6 | Margaret Hurley | 34 | Daughter | Waitress | Massachusetts |
| 7 | Margaret Hurley | 14 | Granddaughter | — | Massachusetts |
| 8 | James Hurley | 12 | Grandson | — | Massachusetts |
| 9 | Mary Wall | 72 | Roomer | — | Northern Ireland |
| 10 | Ellen Shea | 53 | Roomer | Cook | Irish Free State |
| 11 | Harry P Norton | 51 | Head | Machinist | England |
| 12 | Maude Norton | 57 | Wife | — | England |
| 13 | Hannah Mccarthy | 62 | Head | Cook | Irish Free State |
| 14 | Florence E George | 57 | Head | File Clerk | New Hampshire |
| 15 | Rose A Peckham | 57 | Head | — | Canada French |
| 16 | Patrick Mckenna | 53 | Head | Laborer | Northern Ireland |
| 17 | Catherine Mckenna | 38 | Wife | — | Irish Free State |
| 18 | Mary C Mckenna | 19 | Daughter | — | Massachusetts |
| 19 | James Mckenna | 18 | Son | Clerk | Massachusetts |
| 20 | Robert Mckenna | 16 | Son | — | Massachusetts |
| 21 | Marguerite Mckenna | 15 | Daughter | — | Massachusetts |
| 22 | Frank Mckenna | 14 | Son | — | Massachusetts |
| 23 | John Mckenna THIS PERSON | 12 | Son | — | Massachusetts |
| 24 | Thomas P Mckenna | 5 | Son | — | Massachusetts |
| 25 | William P Mckenna | 5 | Son | — | Massachusetts |
| 26 | George Sullivan | 51 | Roomer | Clerk | Massachusetts |
| 27 | Cornelius Coakley | 53 | Roomer | Freight Handler | Irish Free State |
| 28 | Ann Humphrey | 61 | Head | — | England |
| 29 | Henry R Low | 70 | Roomer | — | Massachusetts |
| 30 | Elizabeth L O'Brien | 49 | Head | — | Massachusetts |
| 31 | Mary L O'Brien | 15 | Daughter | Clerical | Massachusetts |
| 32 | Eldridge A Benn | 64 | Roomer | — | Canada English |
| 33 | John Kenney | 24 | Roomer | Shipping Clerk | Massachusetts |
| 34 | David L Johnston | 56 | Head | Machinist | Sweden |
| 35 | Agda Johnston | 60 | Wife | — | Sweden |
| 36 | August Johnston | 50 | Brother | Machinist | Sweden |
| 37 | Hazel Green | 45 | Head | — | Massachusetts |
| 38 | Annie Green | 55 | Sister | Blade Packer | Massachusetts |
| 39 | Oscar Green | 52 | Brother | Building Repairs | Massachusetts |
| 40 | Charles Green | 54 | Brother | Helper | Massachusetts |
Related Census Records
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)