BT
Betty Thomas — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Marion-County, Iowa
Our Model Tree links this Betty Thomas across the 1930 and 1940 US Censuses in Marion-County, Iowa (XGBoost, ~Confirmed) — first a daughter (b.~1926), then head of a 10-person household.
Age 14
b. ~1926
Female
Daughter
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Marion-County, Iowa |
| Surname | Thomas |
| Given Name | Betty |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Melcher Town |
| 1935 Residence (County) | Marion |
| Additional Details | |
| Highest Grade | 5 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Township / Ward | Melcher Town |
| Est. Birth Year | ~1926 |
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 Betty | Age | Birth yr |
|---|---|---|---|---|
| Neil Thomas | Son | — | 9 | ~1931 |
| Pearl Thomas | Spouse | — | 40 | ~1900 |
| Helen Thomas | Daughter | — | 4 | ~1936 |
| Betty Thomas | Daughter | — | 14 | ~1926 |
| Arthur Thomas | Son | — | 7 | ~1933 |
| Freddie Thomas | Son | — | 8 | ~1932 |
| Raymond Thomas | Son | — | 12 | ~1928 |
| Dorothy Thomas | Daughter | — | 15 | ~1925 |
| William Thomas | Son | — | 13 | ~1927 |
| Dwight Thomas | Head | — | 40 | ~1900 |
Census Appearances
1930
Marion, Iowa
Daughter, age 4
Marion, Iowa · implied b. ~1926 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thomas |
| Given Name | Betty J. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Marion-County, Iowa
Daughter, age 14
Marion-County, Iowa · implied b. ~1926 — 10 household members
| Surname | Thomas |
| Given Name | Betty |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Melcher Town |
| 1935 Residence (County) | Marion |
| Highest Grade | 5 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
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 Betty Thomas across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Betty Thomas
Daughter · 1940 · age 14 · b. ~1926 · Iowa
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Sibling
Neil Thomas
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Arthur Thomas
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Raymond Thomas
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Freddie Thomas
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Helen Thomas
Sibling · 1940 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Thomas
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Dorothy Thomas
Sibling · 1940 · age 15
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 — Marion-County, Iowa
Open full size
1940 US Federal Census — Marion-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01181-00089)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Nora Cross | 43 | Wife | Bookkeeper | Iowa |
| 42 | Homer Cross | 43 | Head | Manager | Iowa |
| 43 | Frances Cross | 38 | Wife | — | Iowa |
| 44 | Silas Smith | 41 | Head | — | Iowa |
| 45 | Bessie Smith | 42 | Wife | — | Iowa |
| 46 | Bernice Smith | 17 | Daughter | New Worker | Iowa |
| 47 | Darlene Smith | 16 | Daughter | — | Iowa |
| 48 | Harold Thompson | 53 | Head | Machinist | Iowa |
| 49 | Margaret Thompson | 50 | Wife | — | Iowa |
| 50 | Mary Huffman | 59 | Cousin | — | Pennsylvania |
| 51 | Lewis Galeazzi | 35 | Head | Town Marshall | Iowa |
| 52 | Hazel Galeazzi | 33 | Wife | — | Iowa |
| 53 | Richard Galeazzi | 13 | Son | — | Iowa |
| 54 | Preston Hiatt | 28 | Head | Trucker | Wyoming |
| 55 | Bonnie Hiatt | 24 | Wife | — | Iowa |
| 56 | Charles Hiatt | 3 | Son | — | Iowa |
| 57 | John Dunlap | 66 | Head | Druggist | Iowa |
| 58 | Emma Mcarthur | 67 | Sister | — | Iowa |
| 59 | Myrtle Mcarthur | 39 | Niece | — | Iowa |
| 60 | Albert H. Nichelson | 73 | Head | — | Missouri |
| 61 | Floyd Nichelson | 46 | Son | Common Laborer | Missouri |
| 62 | Bessie Nichelson | 45 | Daughter-in-law | — | Missouri |
| 63 | Jesse L. Strump | 54 | Head | Janitor | Iowa |
| 64 | Bertha E. Strump | 44 | Wife | — | Iowa |
| 65 | Jesse C. Strump | 28 | Son | Gold Miner | Iowa |
| 66 | Dwight Thomas | 40 | Head | Trucker | Iowa |
| 67 | Pearl Thomas | 40 | Wife | — | Iowa |
| 68 | Dorothy Thomas | 15 | Daughter | — | Iowa |
| 69 | Betty Thomas THIS PERSON | 14 | Daughter | — | Iowa |
| 70 | William Thomas | 13 | Son | — | Iowa |
| 71 | Raymond Thomas | 12 | Son | — | Iowa |
| 72 | Neil Thomas | 9 | Son | — | Iowa |
| 73 | Freddie Thomas | 8 | Son | — | Iowa |
| 74 | Arthur Thomas | 7 | Son | — | Iowa |
| 75 | Helen Thomas | 4 | Daughter | — | Iowa |
| 76 | Jennie Rodgers | 59 | Head | Partner | Belgium |
| 77 | Letitia Robertson | 68 | Head | — | Missouri |
| 78 | Herbert Robertson | 27 | Son | Farm-Hand | Missouri |
| 79 | Harvey Robertson | 29 | Son | Clerk | Missouri |
| 80 | Maxine Robertson | 20 | Daughter-in-law | — | Iowa |
Related Census Records
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)