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Mary Mcdonough — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Madison-County, Illinois
Our Model Tree links this Mary Mcdonough across the 1930 and 1940 US Censuses in Madison-County, Illinois (XGBoost, ~Confirmed) — first a daughter (b.~1929), then head of a 6-person household.
Age 11
b. ~1929
Female
Daughter
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Madison-County, Illinois |
| Surname | McDonough |
| Given Name | Mary Lou |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | South Roxana |
| 1935 Residence (County) | Madison |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | G 5 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | South Roxana |
| 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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Mcdonough | Daughter | — | 11 | ~1929 |
| Francis Mcdonough | Daughter | — | 12 | ~1928 |
| Maxine Mcdonough | Daughter | — | 14 | ~1926 |
| Herbert Mcdonough | Head | — | 34 | ~1906 |
| Herbert Mcdonough | Son | — | 15 | ~1925 |
| Hazel Mcdonough | Spouse | — | 34 | ~1906 |
Census Appearances
1930
Madison, Illinois
Daughter, age 1
Madison, Illinois · implied b. ~1929 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McDonough |
| Given Name | Mary Lou |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Can Read/Write | No |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Madison-County, Illinois
Daughter, age 11
Madison-County, Illinois · implied b. ~1929 — 6 household members
| Surname | McDonough |
| Given Name | Mary Lou |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | South Roxana |
| 1935 Residence (County) | Madison |
| Income (1939) | 0 |
| Highest Grade | G 5 |
| 1935 Residence | Same place |
| 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 Mcdonough across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Mcdonough
Daughter · 1940 · age 11 · b. ~1929 · Illinois
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Sibling
Maxine Mcdonough
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Herbert Mcdonough
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Francis Mcdonough
Sibling · 1940 · age 12
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 — Madison-County, Illinois
Open full size
1940 US Federal Census — Madison-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00848-01021)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | John Spudich | 30 | Head | Pipe Fitter | Illinois |
| 42 | Rena Spudich | 20 | Wife | — | Illinois |
| 43 | Herbert Mcdonough | 34 | Head | Plasterer | Illinois |
| 44 | Hazel Mcdonough | 34 | Wife | — | Illinois |
| 45 | Herbert Mcdonough | 15 | Son | — | Illinois |
| 46 | Maxine Mcdonough | 14 | Daughter | — | Illinois |
| 47 | Francis Mcdonough | 12 | Daughter | — | Illinois |
| 48 | Mary Lou Mcdonough THIS PERSON | 11 | Daughter | — | Illinois |
| 49 | Samuel Jahnke | 37 | Head | Control Clerk | Missouri |
| 50 | Velma Jahnke | 33 | Wife | — | Missouri |
| 51 | Shirley Jahnke | 10 | Daughter | — | Missouri |
| 52 | Henry Tennikait | 43 | Head | Engineer | Illinois |
| 53 | Amelia Tennikait | 38 | Wife | — | Illinois |
| 54 | Garth Tennikait | 16 | Son | — | Illinois |
| 55 | Elaine Tennikait | 14 | Daughter | — | Illinois |
| 56 | Marvin Tennikait | 12 | Son | — | Illinois |
| 57 | Fannie Poag | 63 | Head | — | Illinois |
| 58 | Hugh Poag | 70 | Head | — | Illinois |
| 59 | Vena Poag | 55 | Wife | — | Illinois |
| 60 | Gilbert Poag | 26 | Son | Office Accountant | Illinois |
| 61 | Donald Poag | 18 | Son | — | Illinois |
| 62 | Walter Huebner | 33 | Head | Shipping Clerk | Illinois |
| 63 | Edna Huebner | 30 | Wife | — | Illinois |
| 64 | Dorothy Huebner | 1 | Daughter | — | Illinois |
| 65 | Emma Huebner | 63 | Mother | — | Illinois |
| 66 | Frank Giesike | 41 | Head | Electrician | Missouri |
| 67 | Doris Giesike | 37 | Wife | — | Illinois |
| 68 | Shirley Giesike | 15 | Daughter | — | Illinois |
| 69 | W. Arnold Roseberry | 45 | Head | Engineer | Illinois |
| 70 | Minnie Roseberry | 41 | Wife | — | Illinois |
| 71 | Gordon Roseberry | 20 | Son | Chauffeur | Illinois |
| 72 | Geraldine Roseberry | 16 | Daughter | — | Illinois |
| 73 | Edgar Troppel | 23 | Head | Foreman | Illinois |
| 74 | Virginia Troppel | 22 | Wife | — | Illinois |
| 75 | James Troppel | 0 | Son | — | Illinois |
| 76 | Harry Foster | 42 | Head | Electrician | Missouri |
| 77 | Marie Foster | 27 | Wife | — | Kansas |
| 78 | Harold Gallatin | 31 | Head | Labour | Indiana |
| 79 | Elma Gallatin | 21 | Wife | — | Illinois |
| 80 | Francis Gallatin | 3 | Daughter | — | 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)