MK
Mary Kenney — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Middlesex-County, Massachusetts
Our Model Tree links this Mary Kenney across the 1930 and 1940 US Censuses in Middlesex-County, Massachusetts (XGBoost, ~Confirmed) — first a daughter (b.~1925), then head of a 8-person household.
Age 15
b. ~1925
Female
Daughter
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, Massachusetts |
| Surname | Kenney |
| Given Name | Mary F. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Arlington town |
| 1935 Residence (County) | Middlesex |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | Hs 2 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | Arlington Town |
| Est. Birth Year | ~1925 |
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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Kenney | Spouse | — | 46 | ~1894 |
| Anna Kenney | Daughter | — | 18 | ~1922 |
| John Kenney | Son | — | 5 | ~1935 |
| Edward Kenney | Head | — | 56 | ~1884 |
| Christina Kenney | Daughter | — | 13 | ~1927 |
| Margaret Kenney | Daughter | — | 17 | ~1923 |
| Mary Kenney | Daughter | — | 15 | ~1925 |
| Edward Kenney | Son | — | 20 | ~1920 |
Census Appearances
1930
Middlesex, Massachusetts
Daughter, age 5
Middlesex, Massachusetts · implied b. ~1925 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kenney |
| Given Name | Mary F |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Occupation | none |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Middlesex-County, Massachusetts
Daughter, age 15
Middlesex-County, Massachusetts · implied b. ~1925 — 8 household members
| Surname | Kenney |
| Given Name | Mary F. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Arlington town |
| 1935 Residence (County) | Middlesex |
| Income (1939) | 0 |
| Highest Grade | Hs 2 |
| 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 Kenney across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Kenney
Daughter · 1940 · age 15 · b. ~1925 · Massachusetts
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Sibling
Margaret Kenney
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Edward Kenney
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Kenney
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Christina Kenney
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Anna Kenney
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 — Middlesex-County, Massachusetts
Open full size
1940 US Federal Census — Middlesex-County, Massachusetts
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01601-00633)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Archie Russian | 6 | Son | — | Massachusetts |
| 2 | Albia Gosdanian | 64 | Law | — | Armenia |
| 3 | Phillip G. Grewling | 30 | Head | Commercial Artist | Massachusetts |
| 4 | Arline Grewling | 32 | Wife | — | Massachusetts |
| 5 | Judith Grewling | 5 | Daughter | — | Massachusetts |
| 6 | William Grewling | 2 | Son | — | Massachusetts |
| 7 | James Lajeunesse | 45 | Head | Chef | Massachusetts |
| 8 | Helene Lajeunesse | 37 | Wife | — | Canada-French |
| 9 | Edward Lajeunesse | 5 | Son | — | Maine |
| 10 | Arthur Large | 59 | Head | Carpenter | Canada-English |
| 11 | Ethel Large | 55 | Wife | — | Canada-English |
| 12 | Louise Kelley | 26 | Daughter | Stenographer | Massachusetts |
| 13 | Thomas Kelley | 9 | Grandson | — | Massachusetts |
| 14 | James R. Griffiths | 52 | Head | Laborer | Massachusetts |
| 15 | Nora Griffiths | 51 | Wife | — | Massachusetts |
| 16 | Mary Griffiths | 19 | Daughter | Cashier | Massachusetts |
| 17 | Edward Griffiths | 15 | Son | — | Massachusetts |
| 18 | Edward J. Devitt | 28 | Head | Printer | Ohio |
| 19 | Doris Devitt | 25 | Wife | — | Massachusetts |
| 20 | Edward Devitt | 3 | Son | — | Massachusetts |
| 21 | Nancy Jeanne Devitt | 1 | Daughter | — | Massachusetts |
| 22 | M. Clayton Gould | 36 | Head | General Clerk | Massachusetts |
| 23 | L. Ruth Gould | 29 | Wife | — | Massachusetts |
| 24 | Janet Ruth Gould | 5 | Daughter | — | Massachusetts |
| 25 | M. Clayton Jr. Gould | 2 | Son | — | Massachusetts |
| 26 | C. Murray | 75 | Father | — | Massachusetts |
| 27 | Sarah L. Murray | 70 | Mother | — | Massachusetts |
| 28 | Edward Kenney | 56 | Head | Caretaker | Irish Free State |
| 29 | Mary J. Kenney | 46 | Wife | Student Worker | Irish Free State |
| 30 | Edward P. Kenney | 20 | Son | Student Worker | Massachusetts |
| 31 | Anna Kenney | 18 | Daughter | New Worker | Massachusetts |
| 32 | Margaret Kenney | 17 | Daughter | — | Massachusetts |
| 33 | Mary F. Kenney THIS PERSON | 15 | Daughter | — | Massachusetts |
| 34 | Christina Kenney | 13 | Daughter | — | Massachusetts |
| 35 | John J. Kenney | 5 | Son | — | Massachusetts |
| 36 | Charles Potter | 57 | Head | Tire Vulcanizer | Canada-French |
| 37 | Mary A. Potter | 50 | Wife | — | Canada-French |
| 38 | Carl Potter | 25 | Son | Delivery Man | Massachusetts |
| 39 | Charles A. Potter | 21 | Son | Clerk | Massachusetts |
| 40 | Armand Potter | 19 | Son | Delivery Man | 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)