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Mary May — 1940 US Census Record
Model Tree available1940 United States Federal Census · Big-Stone-County, Minnesota
Our Model Tree links this Mary May across the 1920, 1930 and 1940 US Censuses in Big-Stone-County, Minnesota (XGBoost, ~Confirmed), with identified parents Paul & Mathilda — first a daughter (b.~1915), then head of a 5-person household.
Age 25
b. ~1915
Female
Daughter
Born: Minnesota
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Big-Stone-County, Minnesota |
| Surname | May |
| Given Name | Mary |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Minnesota |
| 1935 Residence (City) | Otrey Township |
| 1935 Residence (County) | Big Stone |
| Additional Details | |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
| Township / Ward | Otrey Township |
| Est. Birth Year | ~1915 |
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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Gertrude May | Daughter | — | 22 | ~1918 |
| Mary May | Daughter | — | 25 | ~1915 |
| Edna May | Daughter | — | 19 | ~1921 |
| Paul May | Head | — | 52 | ~1888 |
| Mathilda May | Spouse | — | 51 | ~1889 |
Census Appearances
1920
Big Stone, …
Daughter, age 5
Big Stone, Minnesota · implied b. ~1915 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | May |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | Minnesota |
| Father's Birthplace | Minnesota |
| Mother's Birthplace | North Dakota |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
1930
Big Stone, …
Daughter, age 15
Big Stone, Minnesota · implied b. ~1915 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | May |
| Given Name | Mary A |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Minnesota |
| Father's Birthplace | Minnesota |
| Mother's Birthplace | North Dakota |
| Can Read/Write | Yes |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
1940
Big-Stone-County, Minnesota
Daughter, age 25
Big-Stone-County, Minnesota · implied b. ~1915 — 5 household members
| Surname | May |
| Given Name | Mary |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Minnesota |
| 1935 Residence (City) | Otrey Township |
| 1935 Residence (County) | Big Stone |
| Highest Grade | Hs 4 |
| 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 May across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Paul May (~0.92 confidence) and mother Mathilda May (~0.92 confidence) and mother Mathilda May (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Paul May
b. ~1888
Source father
● Household
· direct · ~0.92
Mother
Mathilda May
b. ~1889
Source mother
● Household
· direct · ~0.92
Mother
Mathilda May
b. ~1889
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary May
Daughter · 1940 · age 25 · b. ~1915 · Minnesota
★ You are viewing this record
Sibling
Edna May
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Gertrude May
Sibling · 1940 · age 22
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 — Big-Stone-County, Minnesota
Open full size
1940 US Federal Census — Big-Stone-County, Minnesota
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01907-00677)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Loretta Horneman | 10 | daughter | — | Minnesota |
| 2 | Reinhard Horneman | 40 | brother | Farmer | Minnesota |
| 3 | Ervin Gerber | 32 | head | Farmer | Minnesota |
| 4 | Dorothy Gerber | 25 | wife | — | Minnesota |
| 5 | Elaine Gerber | 4 | daughter | — | Minnesota |
| 6 | Verden Gerber | 2 | son | — | Minnesota |
| 7 | Paul May | 52 | head | Farmer | Minnesota |
| 8 | Mathilda May | 51 | wife | — | No. Dakota |
| 9 | Mary May THIS PERSON | 25 | daughter | — | Minnesota |
| 10 | Gertrude May | 22 | daughter | — | Minnesota |
| 11 | Edna May | 19 | daughter | School Teacher | Minnesota |
| 12 | William May | 55 | head | Farmer | Minnesota |
| 13 | Martha May | 45 | wife | — | Minnesota |
| 14 | Johanna May | 83 | mother | — | Germany |
| 15 | William Klepel | 33 | head | Farmer | Minnesota |
| 16 | Martha Klepel | 26 | wife | — | Minnesota |
| 17 | Anita Klepel | 4 | daughter | — | Minnesota |
| 18 | Glen Klepel | 1 | son | — | Minnesota |
| 19 | Roy Viles | 28 | head | Farmer | Minnesota |
| 20 | Laurene Viles | 28 | wife | Housework | No. Dakota |
| 21 | Ruth Viles | 3 | daughter | — | Minnesota |
| 22 | Delores Viles | 2 | daughter | — | Minnesota |
| 23 | Merle Nagle | 35 | head | Farmer | Minnesota |
| 24 | Laverna Nagle | 34 | wife | — | Minnesota |
| 25 | Richard Nagle | 7 | son | — | Minnesota |
| 26 | Marion Wood | 30 | head | Farmer | Minnesota |
| 27 | Muriel Wood | 37 | wife | — | Minnesota |
| 28 | Oscar Lundgren | 51 | head | Farmer | Minnesota |
| 29 | Wayne Lundgren | 24 | son | Farmer | Minnesota |
| 30 | Lewis Lundgren | 23 | son | Farmer | Minnesota |
| 31 | Henry Hovde | 57 | head | Farmer | Wisconsin |
| 32 | Rhoda Hovde | 50 | wife | — | Wisconsin |
| 33 | Alvin Hovde | 21 | son | Farmer | Minnesota |
| 34 | Emil Steffen | 40 | head | Farmer | Minnesota |
| 35 | Selma Steffen | 45 | sister | — | Minnesota |
| 36 | Charles Steffen | 73 | father | — | Germany |
| 37 | Alfred Hovde | 57 | head | Farmer | Wisconsin |
| 38 | Edna Hovde | 49 | wife | — | Wisconsin |
| 39 | Howard Hovde | 13 | son | — | Minnesota |
| 40 | Glen Krier | 25 | step-son | Farmer | Minnesota |
Pedigree Summary
Mary + 2 siblings
Gen 1 · 3 parents
~0.92
Max depth 4 (1900–1950 window)
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)