MD
Mary Dunlap — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Montgomery-County, Illinois
Our Model Tree links this Mary Dunlap across the 1930 and 1940 US Censuses in Montgomery-County, Illinois (XGBoost, ~Confirmed) — first a spouse (b.~1910), then head of a 7-person household.
Age 30
b. ~1910
Female
Spouse
Born: Illinois
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Montgomery-County, Illinois |
| Surname | Dunlap |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 30 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Montgomery |
| Additional Details | |
| Highest Grade | Hs 4 |
| 1935 Residence | Illinois |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Harvel Twp |
| Est. Birth Year | ~1910 |
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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Walter Dunlap | Son | — | 1 | ~1939 |
| Norma Dunlap | Daughter | — | 8 | ~1932 |
| Alice Dunlap | Daughter | — | 10 | ~1930 |
| Walter Dunlap | Head | — | 38 | ~1902 |
| Lowell Dunlap | Son | — | 3 | ~1937 |
| Donald Dunlap | Son | — | 11 | ~1929 |
| Mary Dunlap | Spouse | — | 30 | ~1910 |
Census Appearances
1930
Montgomery, Illinois
Other, age 20
Montgomery, Illinois · implied b. ~1910 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Dunlap |
| Given Name | Mary E. |
| Relationship to Head | Wife-H |
| Sex | F |
| Color / Race | White |
| Age | 20 |
| Marital Status | Married |
| Birthplace | Illinois |
| Father's Birthplace | Austria |
| Mother's Birthplace | Illinois |
| Class of Worker | 18 |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Montgomery-County, Illinois
Spouse, age 30
Montgomery-County, Illinois · implied b. ~1910 — 7 household members
| Surname | Dunlap |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 30 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Montgomery |
| Highest Grade | Hs 4 |
| 1935 Residence | Illinois |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
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 Dunlap across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Dunlap
Spouse · 1940 · age 30 · b. ~1910 · Illinois
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Montgomery-County, Illinois
Open full size
1940 US Federal Census — Montgomery-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00860-00252)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | John Kruger | 63 | Head | Farming | Illinois |
| 2 | Elizabeth Kruger | 57 | Wife | — | Indiana |
| 3 | Pauline Kruger | 27 | Daughter | — | Illinois |
| 4 | Frank Kruger | 22 | Son | — | Illinois |
| 5 | Marie Kruger | 19 | Daughter | — | Illinois |
| 6 | Henry Kruger | 17 | Son | Laborer | Illinois |
| 7 | Rita Kruger | 14 | Daughter | — | Illinois |
| 8 | Wayne Henderson | 28 | Head | Carpenter | Illinois |
| 9 | Ida Henderson | 22 | Wife | — | Missouri |
| 10 | Betty Lou Henderson | 3 | Daughter | — | Illinois |
| 11 | John D. Langem | 71 | Head | Farming | Illinois |
| 12 | Margaret Langem | 71 | Wife | — | Illinois |
| 13 | Frank D. Kruger | 53 | Head | Farming | Illinois |
| 14 | Bessie Kruger | 50 | Wife | — | Oregon |
| 15 | Francis Kruger | 22 | Daughter | — | Illinois |
| 16 | Lawrence Kruger | 20 | Son | Laborer | Illinois |
| 17 | Celestine Kruger | 18 | Daughter | Secretary | Illinois |
| 18 | John Kruger | 14 | Son | — | Illinois |
| 19 | Mary Kruger | 12 | Daughter | — | Illinois |
| 20 | Herbert Kruger | 5 | Son | — | Illinois |
| 21 | James Leonards | 65 | Head | Farming | Illinois |
| 22 | Sarah Leonards | 62 | Wife | — | Illinois |
| 23 | Lyle Leonards | 23 | Son | Laborer | Illinois |
| 24 | Ruth Leonards | 19 | Daughter | Bookkeeper | Illinois |
| 25 | Forrest Fenton | 21 | Head | Laborer | Illinois |
| 26 | Gertrude Fenton | 19 | Wife | — | Tennessee |
| 27 | Patsy Darlene Fenton | 1 | Daughter | — | Illinois |
| 28 | Mary Mcanarney | 66 | Head | Farming | Illinois |
| 29 | Richard Mcanarney | 42 | Son | Farming | Illinois |
| 30 | Le Roy Mcanarney | 38 | Son | Farming | Illinois |
| 31 | Joseph Taylor | 29 | Head | Laborer | Kansas |
| 32 | Irene Taylor | 28 | Daughter | — | Illinois |
| 33 | Walter Dunlap | 38 | Head | Farming | Illinois |
| 34 | Mary Dunlap THIS PERSON | 30 | Wife | — | Illinois |
| 35 | Donald Dunlap | 11 | Son | — | Illinois |
| 36 | Alice Dunlap | 10 | Daughter | — | Illinois |
| 37 | Norma Dunlap | 8 | Daughter | — | Illinois |
| 38 | Lowell Dunlap | 3 | Son | — | Illinois |
| 39 | Walter Dunlap | 1 | Son | — | Illinois |
| 40 | Lee Woffenstette | 41 | Head | Farming | Illinois |
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)