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Mary Mckenna — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Ionia-County, Michigan
Our Model Tree links this Mary Mckenna across the 1930 and 1940 US Censuses in Ionia-County, Michigan (XGBoost, ~Confirmed) — first a daughter (b.~1925), then head of a 10-person household.
Age 15
b. ~1925
Female
Daughter
Born: Michigan
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Ionia-County, Michigan |
| Surname | McKenna |
| Given Name | Mary J. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Michigan |
| 1935 Residence (City) | Ionia |
| Additional Details | |
| Class of Worker | 0 |
| Highest Grade | S 8 |
| 1935 Residence | Same place |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
| Township / Ward | Hubbardston Village |
| 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.
10 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Mckenna | Daughter | — | 15 | ~1925 |
| Katherine Mckenna | Daughter | — | 6 | ~1934 |
| George Mckenna | Head | — | 49 | ~1891 |
| Loris Mckenna | Son | — | 12 | ~1928 |
| Gerald Mckenna | Son | — | 8 | ~1932 |
| Patrick Mckenna | Son | — | 17 | ~1923 |
| Walter Mckenna | Son | — | 21 | ~1919 |
| Eugene Mckenna | Son | — | 13 | ~1927 |
| Bernard Mckenna | Son | — | 9 | ~1931 |
| Margaret Mckenna | Spouse | — | 43 | ~1897 |
Census Appearances
1930
Montcalm, Michigan
Daughter, age 5
Montcalm, Michigan · implied b. ~1925 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McKenna |
| Given Name | Mary J |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | Michigan |
| Father's Birthplace | Michigan |
| Mother's Birthplace | Michigan |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
1940
Ionia-County, Michigan
Daughter, age 15
Ionia-County, Michigan · implied b. ~1925 — 10 household members
| Surname | McKenna |
| Given Name | Mary J. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Michigan |
| 1935 Residence (City) | Ionia |
| Class of Worker | 0 |
| Highest Grade | S 8 |
| 1935 Residence | Same place |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
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 Mckenna across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Mckenna
Daughter · 1940 · age 15 · b. ~1925 · Michigan
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Sibling
Walter Mckenna
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Eugene Mckenna
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Patrick Mckenna
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Katherine Mckenna
Sibling · 1940 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Loris Mckenna
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Gerald Mckenna
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Bernard Mckenna
Sibling · 1940 · age 9
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 — Ionia-County, Michigan
Open full size
1940 US Federal Census — Ionia-County, Michigan
Page Contents
38 people indexed on this census page (nara:1940:m-t0627-01764-00718)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | James Edwards | 15 | Lodger | House Keeper | Michigan |
| 42 | — | None | — | — | — |
| 43 | Loretta O'Grady | 35 | Head | Book Keeper | Illinois |
| 44 | Kenneth O'Grady | 13 | Son | — | Illinois |
| 45 | Clifford O'Grady | 11 | Son | — | Illinois |
| 47 | West C. Warner | 63 | Head | Paper Hanger | Michigan |
| 48 | Hulda C. Warner | 57 | Wife | — | Michigan |
| 49 | Margaret Proctor | 56 | Head | Keeping House | Canada-English |
| 50 | Leighton Proctor | 17 | Son | New Worker | Michigan |
| 51 | Marshall Cranson | 83 | Head | — | Michigan |
| 52 | May Sharp | 84 | Head | — | New York |
| 53 | Cylina Williams | 61 | Daughter | — | Michigan |
| 54 | George Williams | 57 | Son-in-law | — | Michigan |
| 55 | Dolores Thundotte | 11 | Great Grand Daughter | — | Michigan |
| 56 | Charles M. Fowler | 56 | Head | — | Michigan |
| 57 | Anna Fowler | 49 | Wife | — | Pennsylvania |
| 58 | Betty Ann Fowler | 7 | Daughter | — | Michigan |
| 60 | Melvina Henn | 88 | Head | — | Michigan |
| 61 | Edwin Steel | 67 | Head | — | Michigan |
| 62 | Abbie Steel | 61 | Wife | — | Michigan |
| 63 | Clara Stoddard | 78 | Head | — | Michigan |
| 64 | Loretta D. Stoddard | 76 | Wife | — | Michigan |
| 65 | Anthony Datema | 46 | Head | Truck Driver | Holland |
| 66 | Eva Datema | 33 | Wife | — | Michigan |
| 67 | Robert Datema | 12 | Son | — | Michigan |
| 68 | Elmer Haight | 76 | Head | — | Michigan |
| 69 | Ed H. Loberne | 71 | Head | Auctioneer | Michigan |
| 70 | Jessie Loberne | 66 | Wife | — | Michigan |
| 71 | George Mckenna | 49 | Head | Farm Labor | Michigan |
| 72 | Margaret Mckenna | 43 | Wife | — | Michigan |
| 73 | Walter Mckenna | 21 | Son | New Worker | Michigan |
| 74 | Patrick Mckenna | 17 | Son | Farm Labor | Michigan |
| 75 | Mary J. Mckenna THIS PERSON | 15 | Daughter | — | Michigan |
| 76 | Eugene Mckenna | 13 | Son | — | Michigan |
| 77 | Loris M. Mckenna | 12 | Son | — | Michigan |
| 78 | Bernard A. Mckenna | 9 | Son | — | Michigan |
| 79 | Gerald Mckenna | 8 | Son | — | Michigan |
| 80 | Katherine B. Mckenna | 6 | Daughter | — | Michigan |
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)