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Lucy Thomas — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Benson-County, North Dakota
Our Model Tree links this Lucy Thomas across the 1930 and 1940 US Censuses in Benson-County, North Dakota (XGBoost, ~Confirmed) — first a daughter (b.~1922), then head of a 12-person household.
Age 18
b. ~1922
Female
Daughter
Born: North Dakota
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Benson-County, North Dakota |
| Surname | Thomas |
| Given Name | Lucy |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | North Dakota |
| 1935 Residence (City) | East Fork Twp. |
| 1935 Residence (County) | Benson |
| Additional Details | |
| Industry | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | North Dakota |
| Birth Country | United States |
| Birthplace (normalized) | north dakota |
| Township / Ward | East Fork Twp |
| Est. Birth Year | ~1922 |
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.
12 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Lucy | Age | Birth yr |
|---|---|---|---|---|
| Annie Thomas | Daughter | — | 20 | ~1920 |
| Agnes Thomas | Daughter | — | 1 | ~1939 |
| Mike Thomas | Son | — | 14 | ~1926 |
| Dorothy Thomas | Daughter | — | 4 | ~1936 |
| Conrad Thomas | Son | — | 8 | ~1932 |
| Magdalena Thomas | Spouse | — | 42 | ~1898 |
| Leonard Thomas | Son | — | 11 | ~1929 |
| Frank Thomas | Head | — | 46 | ~1894 |
| Lucy Thomas | Daughter | — | 18 | ~1922 |
| Mary Thomas | Daughter | — | 19 | ~1921 |
| Leo Thomas | Son | — | 13 | ~1927 |
| Frank Thomas | Son | — | 17 | ~1923 |
Census Appearances
1930
Benson, North …
Daughter, age 8
Benson, North Dakota · implied b. ~1922 — 11 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thomas |
| Given Name | Lucy |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 8 |
| Marital Status | Single |
| Birthplace | North Dakota |
| Father's Birthplace | North Dakota |
| Mother's Birthplace | Russia |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | North Dakota |
| Birth Country | United States |
| Birthplace (normalized) | north dakota |
1940
Benson-County, North …
Daughter, age 18
Benson-County, North Dakota · implied b. ~1922 — 12 household members
| Surname | Thomas |
| Given Name | Lucy |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | North Dakota |
| 1935 Residence (City) | East Fork Twp. |
| 1935 Residence (County) | Benson |
| Industry | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | North Dakota |
| Birth Country | United States |
| Birthplace (normalized) | north dakota |
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 Lucy Thomas across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Lucy Thomas
Daughter · 1940 · age 18 · b. ~1922 · North Dakota
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Sibling
Leo Thomas
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Agnes Thomas
Sibling · 1940 · age 1
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Frank Thomas
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Dorothy Thomas
Sibling · 1940 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Annie Thomas
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mike Thomas
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Leonard Thomas
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Conrad Thomas
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Thomas
Sibling · 1940 · age 19
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 — Benson-County, North Dakota
Open full size
1940 US Federal Census — Benson-County, North Dakota
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02993-00063)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Mary | 60 | Mother | — | Sweden |
| 42 | Ernest | 21 | Brother | Farmer | North Dakota |
| 43 | Ethel Castet | 34 | Sister | — | North Dakota |
| 44 | Darlene Castet | 9 | Niece | — | North Dakota |
| 45 | Leroy Castet | 5 | Nephew | — | North Dakota |
| 46 | May Pramhus | 30 | Sister | — | North Dakota |
| 47 | Frank C. Thomas | 46 | Head | Farmer | South Dakota |
| 48 | Magdalena Thomas | 42 | Wife | — | Russia |
| 49 | Annie Thomas | 20 | Daughter | — | North Dakota |
| 50 | Mary Thomas | 19 | Daughter | — | North Dakota |
| 51 | Lucy Thomas THIS PERSON | 18 | Daughter | — | North Dakota |
| 52 | Frank Thomas | 17 | Son | Farm Laborer | North Dakota |
| 53 | Mike Thomas | 14 | Son | — | North Dakota |
| 54 | Leo Thomas | 13 | Son | — | North Dakota |
| 55 | Leonard Thomas | 11 | Son | — | North Dakota |
| 56 | Conrad Thomas | 8 | Son | — | North Dakota |
| 57 | Dorothy Thomas | 4 | Daughter | — | North Dakota |
| 58 | Agnes Thomas | 1 | Daughter | — | North Dakota |
| 59 | Alis Doson | 50 | Head | Farmer | Russia |
| 60 | Rosa Doson | 50 | Wife | — | Russia |
| 61 | Andy Doson | 22 | Son | Farm Laborer | North Dakota |
| 62 | Barbara Doson | 21 | Daughter | — | North Dakota |
| 63 | Joe Doson | 18 | Daughter | Farm Laborer | North Dakota |
| 64 | Sebastian Doson | 16 | Son | Farm Laborer | North Dakota |
| 65 | Katie Doson | 14 | Daughter | — | North Dakota |
| 66 | Julia Doson | 12 | Daughter | — | North Dakota |
| 67 | Lena Doson | 12 | Daughter | — | North Dakota |
| 68 | Alois Doson | 11 | Son | — | North Dakota |
| 69 | Lorenz Heilman | 48 | Head | Farmer | North Dakota |
| 70 | Elizabeth Heilman | 41 | Wife | — | North Dakota |
| 71 | Henry Heilman | 21 | Son | Farm Laborer | North Dakota |
| 72 | Lawrence Heilman | 19 | Son | Farm Laborer | North Dakota |
| 73 | Magdalene Heilman | 18 | Daughter | — | North Dakota |
| 74 | Ruth Heilman | 16 | Daughter | — | North Dakota |
| 75 | Irene Ab. Heilman | 14 | Daughter | — | North Dakota |
| 76 | Isabel Heilman | 13 | Daughter | — | North Dakota |
| 77 | Viola Heilman | 11 | Daughter | — | North Dakota |
| 78 | Edwin Heilman | 10 | Son | — | North Dakota |
| 79 | Lillian Heilman | 9 | Daughter | — | North Dakota |
| 80 | Angela Heilman | 7 | Daughter | — | North Dakota |
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)