MM
Mary Mcdonald — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Clay-County, Minnesota
Our Model Tree links this Mary Mcdonald across the 1930 and 1940 US Censuses in Clay-County, Minnesota (XGBoost, ~Confirmed) — first a daughter (b.~1929), then head of a 12-person household.
Age 11
b. ~1929
Female
Daughter
Born: Minnesota
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Clay-County, Minnesota |
| Surname | McDonald |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Minnesota |
| 1935 Residence (City) | Hawley village |
| 1935 Residence (County) | Clay |
| Additional Details | |
| Highest Grade | No 6 |
| 1935 Residence | Same place |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
| Township / Ward | Hawley Village |
| Est. Birth Year | ~1929 |
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 Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Mcdonald | Daughter | — | 11 | ~1929 |
| Katherine Mcdonald | Daughter | — | 15 | ~1925 |
| Sara Mcdonald | Daughter | — | ~1940 | |
| Margaret Mcdonald | Daughter | — | 3 | ~1937 |
| Patricia Mcdonald | Daughter | — | 9 | ~1931 |
| Barbara Mcdonald | Daughter | — | 8 | ~1932 |
| John Mcdonald | Head | — | 44 | ~1896 |
| Katherine Hozan | Other | — | 69 | ~1871 |
| Charles Mcdonald | Son | — | 5 | ~1935 |
| George Mcdonald | Son | — | 18 | ~1922 |
| John Mcdonald | Son | — | 17 | ~1923 |
| Katherine Mcdonald | Spouse | — | 42 | ~1898 |
Census Appearances
1930
Clay, Minnesota
Daughter, age 1
Clay, Minnesota · implied b. ~1929 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McDonald |
| Given Name | Mary E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Minnesota |
| Father's Birthplace | Minnesota |
| Mother's Birthplace | Minnesota |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
1940
Clay-County, Minnesota
Daughter, age 11
Clay-County, Minnesota · implied b. ~1929 — 12 household members
| Surname | McDonald |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Minnesota |
| 1935 Residence (City) | Hawley village |
| 1935 Residence (County) | Clay |
| Highest Grade | No 6 |
| 1935 Residence | Same place |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
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 Mcdonald across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Mcdonald
Daughter · 1940 · age 11 · b. ~1929 · Minnesota
★ You are viewing this record
Sibling
George Mcdonald
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Barbara Mcdonald
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Katherine Mcdonald
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Mcdonald
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Mcdonald
Sibling · 1940 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Patricia Mcdonald
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Sara Mcdonald
Sibling · 1940 · age
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Charles Mcdonald
Sibling · 1940 · age 5
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 — Clay-County, Minnesota
Open full size
1940 US Federal Census — Clay-County, Minnesota
Page Contents
38 people indexed on this census page (nara:1940:m-t0627-01914-00264)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Lawrence Peterson | 33 | Head | Star Route | Minnesota |
| 2 | Verna Peterson | 30 | Wife | Housekeeper | Minnesota |
| 3 | Frank Erickson | 80 | Head | — | Sweden |
| 4 | Ella Erickson | 35 | Daughter | Housekeeper | Minnesota |
| 5 | Bennie Hanson | 37 | Head | Laborer | Iowa |
| 6 | Mary Hanson | 30 | Wife | Housekeeper | Kansas |
| 7 | Franklin Hunt | 67 | Head | — | Minnesota |
| 8 | Kathryn Hunt | 65 | Wife | Housekeeper | Minnesota |
| 9 | Olaf Nunn | 48 | Head | Highway Maintainer | Minnesota |
| 10 | Irene Nunn | 37 | Wife | Housekeeper | Minnesota |
| 11 | Betty Lou Nunn | 15 | Daughter | — | Minnesota |
| 12 | Selmer Skjerra | 47 | Head | General Mechanic | Minnesota |
| 13 | Inger Skjerra | 56 | Wife | Housekeeper | Minnesota |
| 14 | Lillie Skjerra | 21 | Daughter | Waitress | Minnesota |
| 15 | Clara Skjerra | 15 | Daughter | — | Minnesota |
| 16 | Josie Skjerra | 14 | Daughter | — | Minnesota |
| 18 | Gothard F. Lyden | 50 | Head | Grocer | Minnesota |
| 19 | Mary Lyden | 49 | Wife | Housekeeper | Norway |
| 20 | Donald Lyden | 22 | Son | Grocer | Montana |
| 21 | Waldo Lyden | 21 | Son | — | Minnesota |
| 22 | Fremont Lyden | 14 | Son | — | Minnesota |
| 23 | John T. Mcdonald | 44 | Head | Highway Maintainer | Minnesota |
| 24 | Katherine Mcdonald | 42 | Wife | Housekeeper | Minnesota |
| 25 | George D. Mcdonald | 18 | Son | — | North Dakota |
| 26 | John C. Mcdonald | 17 | Son | — | Minnesota |
| 27 | Katherine Ann Mcdonald | 15 | Daughter | — | Minnesota |
| 28 | Mary Mcdonald THIS PERSON | 11 | Daughter | — | Minnesota |
| 29 | Patricia Mcdonald | 9 | Daughter | — | Minnesota |
| 30 | Barbara Mcdonald | 8 | Daughter | — | Minnesota |
| 31 | Charles Mcdonald | 5 | Son | — | Minnesota |
| 32 | Margaret B. Mcdonald | 3 | Daughter | — | Minnesota |
| 33 | Sara Lee Mcdonald | 0 | Daughter | — | Minnesota |
| 34 | Katherine Hozan | 69 | Mother-in-law | — | Illinois |
| 35 | John Miland | 55 | Head | General Contractor | Norway |
| 36 | Hulda Miland | 57 | Wife | Housekeeper | Minnesota |
| 38 | Henry O. Krogh | 38 | Head | Labourer | Minnesota |
| 39 | Minnie Krogh | 38 | Wife | Housekeeper | Minnesota |
| 40 | Lorraine Krogh | 10 | Daughter | — | Minnesota |
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)