MJ
Mary John — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Todd-County, Minnesota
Our Model Tree links this Mary John across the 1930 and 1940 US Censuses in Todd-County, Minnesota (XGBoost, ~Confirmed) — first a daughter (b.~1929), then head of a 8-person household.
Age 11
b. ~1929
Female
Daughter
Born: Minnesota
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Todd-County, Minnesota |
| Surname | John |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Minnesota |
| 1935 Residence (City) | Hartford Township |
| 1935 Residence (County) | Todd |
| Additional Details | |
| Highest Grade | No 5 |
| 1935 Residence | Same place |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
| Township / Ward | Hartford Township |
| 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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| William John | Son | — | 18 | ~1922 |
| Methody John | Son | — | 17 | ~1923 |
| Anthony John | Son | — | 8 | ~1932 |
| Peter John | Head | — | 45 | ~1895 |
| Mary John | Daughter | — | 11 | ~1929 |
| Bernice John | Daughter | — | 14 | ~1926 |
| Joseph John | Son | — | 12 | ~1928 |
| Francis John | Spouse | — | 40 | ~1900 |
Census Appearances
1930
Todd, Minnesota
Daughter, age 1
Todd, Minnesota · implied b. ~1929 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | John |
| Given Name | Mary |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Minnesota |
| Father's Birthplace | Minnesota |
| Mother's Birthplace | Minnesota |
| Occupation | none |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
1940
Todd-County, Minnesota
Daughter, age 11
Todd-County, Minnesota · implied b. ~1929 — 8 household members
| Surname | John |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Minnesota |
| 1935 Residence (City) | Hartford Township |
| 1935 Residence (County) | Todd |
| Highest Grade | No 5 |
| 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 John across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary John
Daughter · 1940 · age 11 · b. ~1929 · Minnesota
★ You are viewing this record
Sibling
Joseph John
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Anthony John
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Bernice John
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William John
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Methody John
Sibling · 1940 · age 17
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 — Todd-County, Minnesota
Open full size
1940 US Federal Census — Todd-County, Minnesota
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01964-00330)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Edward Theffoath | 49 | Head | Farmer | Minnesota |
| 42 | Katherine Theffoath | 47 | Wife | — | Minnesota |
| 43 | Julene Theffoath | 13 | Daughter | — | Minnesota |
| 44 | Frederick Theffoath | 11 | Son | — | Minnesota |
| 45 | Eva Ann Theffoath | 9 | Daughter | — | Minnesota |
| 46 | Margaret Grayne | 52 | Head | — | Minnesota |
| 47 | Thomas Grayne | 29 | Son | Laborer | Minnesota |
| 48 | Patricia Grayne | 20 | Daughter | — | Minnesota |
| 49 | Leo Grayne | 18 | Son | Laborer | Minnesota |
| 50 | Leo Bonaire | 39 | Head | Farmer | Minnesota |
| 51 | Gertrude Bonaire | 33 | Wife | — | Minnesota |
| 52 | Richard Bonaire | 9 | Son | — | Minnesota |
| 53 | Joseph Bonaire | 8 | Son | — | Minnesota |
| 54 | Lucile Bonaire | 0 | Daughter | — | Minnesota |
| 55 | Thenay Infield | 39 | Head | Farmer | Minnesota |
| 56 | Mary Infield | 34 | Wife | — | Minnesota |
| 57 | Lorraine Infield | 9 | Daughter | — | Minnesota |
| 58 | Eugene Infield | 7 | Son | — | Minnesota |
| 59 | Margie Infield | 3 | Daughter | — | Minnesota |
| 60 | George Infield | 1 | Son | — | Minnesota |
| 61 | Peter John | 45 | Head | Farmer | Minnesota |
| 62 | Francis John | 40 | Wife | — | Minnesota |
| 63 | William John | 18 | Son | Laborer | Minnesota |
| 64 | Methody John | 17 | Son | Laborer | Minnesota |
| 65 | Bernice John | 14 | Daughter | — | Minnesota |
| 66 | Joseph John | 12 | Son | — | Minnesota |
| 67 | Mary John THIS PERSON | 11 | Daughter | — | Minnesota |
| 68 | Anthony John | 8 | Son | — | Minnesota |
| 69 | Henry Fordley | 79 | Head | — | Wisconsin |
| 70 | Minnie Fordley | 52 | Wife | Farmer | Minnesota |
| 71 | Tony Teratella | 34 | Head | Farmer | Minnesota |
| 72 | Leonarda Teratella | 28 | Wife | — | Minnesota |
| 73 | Mary Matzek | 60 | Head | — | Germany |
| 74 | Isadore Distel | 24 | Head | Farmer | Minnesota |
| 75 | Frank Sommerer | 53 | Head | Farmer | Minnesota |
| 76 | Mary Sommerer | 41 | Wife | — | Minnesota |
| 77 | Jerome Sommerer | 16 | Son | Laborer | Minnesota |
| 78 | Roland Sommerer | 14 | Son | — | Minnesota |
| 79 | Frank Sommerer | 12 | Son | — | Minnesota |
| 80 | Rosina Sommerer | 8 | Daughter | — | Minnesota |
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)