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Mary Lucas — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Todd-County, Minnesota
Our Model Tree links this Mary Lucas across the 1930 and 1940 US Censuses in Todd-County, Minnesota (XGBoost, ~Confirmed) — first a daughter (b.~1929), then head of a 10-person household.
Age 11
b. ~1929
Female
Daughter
Born: Minnesota
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Todd-County, Minnesota |
| Surname | Lucas |
| Given Name | Mary Lou |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Minnesota |
| 1935 Residence (City) | R. |
| 1935 Residence (County) | Todd |
| Additional Details | |
| Highest Grade | No 4 |
| 1935 Residence | Minnesota |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
| Township / Ward | Browerville Village |
| 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.
10 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Lucas | Daughter | — | 11 | ~1929 |
| Pauline Lucas | Daughter | — | 5 | ~1935 |
| Philis Lucas | Daughter | — | 12 | ~1928 |
| Eli Lucas | Head | — | 35 | ~1905 |
| Eli Lucas | Son | — | 3 | ~1937 |
| Clatson Lucas | Son | — | 7 | ~1933 |
| Mildred Lucas | Son | — | 9 | ~1931 |
| Romaine Lucas | Son | — | ~1940 | |
| Sylvester Lucas | Son | — | 2 | ~1938 |
| Pauline Lucas | Spouse | — | 30 | ~1910 |
Census Appearances
1930
Todd, Minnesota
Daughter, age 3
Todd, Minnesota · implied b. ~1927 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Lucas |
| Given Name | Mary L. |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | Minnesota |
| Father's Birthplace | Minnesota |
| Mother's Birthplace | Minnesota |
| Occupation | none |
| Can Read/Write | No |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
1940
Todd-County, Minnesota
Daughter, age 11
Todd-County, Minnesota · implied b. ~1929 — 10 household members
| Surname | Lucas |
| Given Name | Mary Lou |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Minnesota |
| 1935 Residence (City) | R. |
| 1935 Residence (County) | Todd |
| Highest Grade | No 4 |
| 1935 Residence | Minnesota |
| 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 Lucas across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Lucas
Daughter · 1940 · age 11 · b. ~1929 · Minnesota
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Sibling
Eli Lucas
Sibling · 1940 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Clatson Lucas
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mildred Lucas
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Romaine Lucas
Sibling · 1940 · age
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Philis Lucas
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Sylvester Lucas
Sibling · 1940 · age 2
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Pauline Lucas
Sibling · 1940 · age 5
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-t0627-01964-00098)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Eli Lucas | 35 | Head | Janitor | Minnesota |
| 42 | Pauline Lucas | 30 | Wife | — | Minnesota |
| 43 | Philis Lucas | 12 | Daughter | — | Minnesota |
| 44 | Mary Lou Lucas THIS PERSON | 11 | Daughter | — | Minnesota |
| 45 | Mildred Lucas | 9 | Son | — | Minnesota |
| 46 | Clatson Lucas | 7 | Son | — | Minnesota |
| 47 | Pauline Ann Lucas | 5 | Daughter | — | Minnesota |
| 48 | Eli Jr. Lucas | 3 | Son | — | Minnesota |
| 49 | Sylvester Lucas | 2 | Son | — | Minnesota |
| 50 | Romaine Lucas | 0 | Son | — | Minnesota |
| 51 | Charley Smaleck | 65 | Head | — | Minnesota |
| 52 | Julia Gigan | 73 | Lodger | — | Germany |
| 53 | Barney Gorne | 23 | Head | Salesman | Minnesota |
| 54 | Mabel Gorne | 33 | Wife | — | Ohio |
| 55 | Dona Joan Gorne | 3 | Daughter | — | Minnesota |
| 56 | Harry Tolga | 40 | Head | Carpenter | Minnesota |
| 57 | Gertrude Tolga | 39 | Wife | — | Minnesota |
| 58 | Jerome Tolga | 11 | Son | — | Minnesota |
| 59 | Joan Tolga | 8 | Daughter | — | Minnesota |
| 60 | Dennis Tolga | 7 | Son | — | Minnesota |
| 61 | Peter Plotnik | 36 | Head | Proprietor | Minnesota |
| 62 | Emily Plotnik | 32 | Wife | — | Minnesota |
| 63 | Aris Rose Plotnik | 8 | Daughter | — | Minnesota |
| 64 | Kenneth Plotnik | 5 | Son | — | Minnesota |
| 65 | Rodney Plotnik | 1 | Son | — | Minnesota |
| 66 | George Heid | 27 | Head | Salesman | Minnesota |
| 67 | Agnes Heid | 26 | Wife | — | Minnesota |
| 68 | Charles Heid | 2 | Son | — | Minnesota |
| 69 | Pauline Gaida | 77 | Head | — | Germany |
| 70 | Katherine Lucas | 78 | Head | — | Germany |
| 71 | Anton Viersgalla | 64 | Head | Farm | Germany |
| 72 | Francis Viersgalla | 56 | Wife | — | Germany |
| 73 | Lawrence A. Viersgalla | 17 | Son | — | Minnesota |
| 74 | Joseph Viersgalla | 14 | Son | — | Minnesota |
| 75 | Delores Viersgalla | 11 | Daughter | — | Minnesota |
| 76 | Christian Geisen | 33 | Head | Superintendent | Minnesota |
| 77 | Evelyn Geisen | 35 | Wife | — | Minnesota |
| 78 | Madeleine Geisen | 6 | Daughter | — | Minnesota |
| 79 | Diana Geisen | 4 | Daughter | — | Minnesota |
| 80 | James Geisen | 2 | Son | — | Minnesota |
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)