MD
Mary Dennis — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Calhoun-County, Michigan
Our Model Tree links this Mary Dennis across the 1930 and 1940 US Censuses in Calhoun-County, Michigan (XGBoost, ~Confirmed) — first a spouse (b.~1903), then head of a 8-person household.
Age 37
b. ~1903
Female
Spouse
Born: Michigan
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Calhoun-County, Michigan |
| Surname | Dennis |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 37 |
| Marital Status | Married |
| Birthplace | Michigan |
| 1935 Residence (City) | Battle Creek City |
| 1935 Residence (County) | Calhoun |
| Additional Details | |
| Highest Grade | No 7 |
| 1935 Residence | Michigan |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
| Township / Ward | Battle Creek City |
| Est. Birth Year | ~1903 |
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 |
|---|---|---|---|---|
| Leo Dennis | Head | — | 41 | ~1899 |
| Mary Dennis | Spouse | — | 37 | ~1903 |
| Mary Dennis | Daughter | — | 17 | ~1923 |
| Leo Dennis | Son | — | 12 | ~1928 |
| Vera Dennis | Daughter | — | 16 | ~1924 |
| John Dennis | Son | — | 3 | ~1937 |
| Martha Dennis | Daughter | — | 5 | ~1935 |
| Betty Dennis | Daughter | — | 14 | ~1926 |
Census Appearances
1930
Calhoun, Michigan
Other, age 27
Calhoun, Michigan · implied b. ~1903 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Dennis |
| Given Name | Mary |
| Relationship to Head | Wife-H |
| Sex | F |
| Color / Race | White |
| Age | 27 |
| Marital Status | Married |
| Birthplace | Michigan |
| Age at First Marriage | 18 |
| Father's Birthplace | Michigan |
| Mother's Birthplace | Michigan |
| Can Read/Write | Yes |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
1940
Calhoun-County, Michigan
Spouse, age 37
Calhoun-County, Michigan · implied b. ~1903 — 8 household members
| Surname | Dennis |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 37 |
| Marital Status | Married |
| Birthplace | Michigan |
| 1935 Residence (City) | Battle Creek City |
| 1935 Residence (County) | Calhoun |
| Highest Grade | No 7 |
| 1935 Residence | Michigan |
| 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 Dennis across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Dennis
Spouse · 1940 · age 37 · b. ~1903 · Michigan
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Calhoun-County, Michigan
Open full size
1940 US Federal Census — Calhoun-County, Michigan
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01736-00272)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Jesse Garner | 44 | Head | Janitor | Tennessee |
| 42 | Clara Garner | 34 | Wife | Homemaker | Indiana |
| 43 | Harry Isaacson | 46 | Head | Salesman | Pennsylvania |
| 44 | Irene Isaacson | 47 | Wife | — | Michigan |
| 45 | Howard Morris | 41 | Lodger | Machine Operator | Michigan |
| 46 | Dorothy Zirick | 25 | Lodger | Waitress | Michigan |
| 47 | Marjorie Purnell | 31 | Lodger | Saleslady | Michigan |
| 48 | Jesse Rainbow | 44 | Head | Moulder | Michigan |
| 49 | Helen Rainbow | 33 | Wife | — | Michigan |
| 50 | Arthur Johnson | 25 | Head | Clerk | Illinois |
| 51 | Luella Derryberry | 32 | Head | Waitress | Tennessee |
| 52 | William Thompson | 36 | Head | Feeder | Michigan |
| 53 | Alma Thompson | 25 | Wife | — | Michigan |
| 54 | June Harris | 25 | Head | — | Michigan |
| 55 | Janet Harris | 15 | Partner | — | Michigan |
| 56 | Leo Dennis | 41 | Head | Installer | Wisconsin |
| 57 | Mary Dennis THIS PERSON | 37 | Wife | — | Michigan |
| 58 | Mary Dennis | 17 | Daughter | — | Michigan |
| 59 | Vera Dennis | 16 | Daughter | — | Michigan |
| 60 | Betty Dennis | 14 | Daughter | — | Michigan |
| 61 | Leo Dennis | 12 | Son | — | Michigan |
| 62 | Martha Dennis | 5 | Daughter | — | Michigan |
| 63 | John Dennis | 3 | Son | — | Michigan |
| 64 | Ruth Davis | 30 | Head | Feeder | Indiana |
| 65 | Barbara Davis | 12 | Daughter | — | Michigan |
| 66 | Richard Davis | 11 | Son | — | Michigan |
| 67 | Hazel Jones | 48 | Lodger | — | Michigan |
| 68 | Everett Jones | 23 | Lodger | Attendant | Michigan |
| 69 | Joseph Buckner | 25 | Head | Winch Operator | Michigan |
| 70 | Eva Buckner | 22 | Wife | Homemaker | Michigan |
| 71 | Anna Cooper | 65 | Head | — | Ohio |
| 72 | Ruby Cooper | 49 | Daughter | Seamstress | Ohio |
| 73 | Dwight Evitts | 26 | Head | Laborer | Michigan |
| 74 | Ruth Evitts | 24 | Wife | — | Michigan |
| 75 | Dwight Evitts | 1 | Son | — | Michigan |
| 76 | Benjamin Brewster | 36 | Head | Cook | Michigan |
| 77 | Gertrude Brewster | 37 | Wife | Waitress | Michigan |
| 78 | John Brewster | 15 | Son | — | Michigan |
| 79 | Phoebe-Mae Brewster | 13 | Daughter | — | Michigan |
| 80 | Barbara Brewster | 11 | 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)