BT
Bertha Thomas — 1940 US Census Record
Model Tree available1940 United States Federal Census · Butler-County, Iowa
Our Model Tree links this Bertha Thomas across the 1920, 1930 and 1940 US Censuses in Butler-County, Iowa (XGBoost, ~Confirmed), with identified parents Margaret — first a daughter (b.~1880), then head of a 2-person household.
Age 60
b. ~1880
Female
Daughter
Born: Kansas
Widowed
1940 Census Record Details
| Census Year | 1940 |
| Location | Butler-County, Iowa |
| Surname | Thomas |
| Given Name | Bertha |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 60 |
| Marital Status | Widowed |
| Birthplace | Kansas |
| 1935 Residence (City) | Greene Town |
| 1935 Residence (County) | Butler |
| Additional Details | |
| Industry | 0 |
| Highest Grade | 6 |
| 1935 Residence | Same house |
| Birth State | Kansas |
| Birth Country | United States |
| Birthplace (normalized) | kansas |
| Township / Ward | Greene Town |
| Est. Birth Year | ~1880 |
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.
2 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Bertha | Age | Birth yr |
|---|---|---|---|---|
| Bertha Thomas | Daughter | — | 60 | ~1880 |
| Margaret Mccracken | Head | — | 84 | ~1856 |
Census Appearances
1920
Butler, Iowa
Spouse, age 39
Butler, Iowa · implied b. ~1881 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thomas |
| Given Name | Bertha |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 39 |
| Marital Status | Married |
| Birthplace | Kansas |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Kansas |
| Birth Country | United States |
| Birthplace (normalized) | kansas |
1930
Butler, Iowa
Spouse, age 50
Butler, Iowa · implied b. ~1880 — 17 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thomas |
| Given Name | Bertha |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 50 |
| Marital Status | Married |
| Birthplace | Kansas |
| Age at First Marriage | 20 |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Can Read/Write | Yes |
| Birth State | Kansas |
| Birth Country | United States |
| Birthplace (normalized) | kansas |
1940
Butler-County, Iowa
Daughter, age 60
Butler-County, Iowa · implied b. ~1880 — 2 household members
| Surname | Thomas |
| Given Name | Bertha |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 60 |
| Marital Status | Widowed |
| Birthplace | Kansas |
| 1935 Residence (City) | Greene Town |
| 1935 Residence (County) | Butler |
| Industry | 0 |
| Highest Grade | 6 |
| 1935 Residence | Same house |
| Birth State | Kansas |
| Birth Country | United States |
| Birthplace (normalized) | kansas |
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 Bertha Thomas across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Margaret Mccracken (~0.92 confidence). The pedigree spans 1 generation with 1 identified ancestor.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Margaret Mccracken
b. ~1856
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Bertha Thomas
Daughter · 1940 · age 60 · b. ~1880 · Iowa
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Butler-County, Iowa
Open full size
1940 US Federal Census — Butler-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01143-00777)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Gene Curtis | 28 | Head | Clerk | Iowa |
| 42 | Ann Curtis | 27 | Wife | — | Iowa |
| 43 | Billy Curtis | 7 | Son | — | Iowa |
| 44 | Dawn Dice | 16 | Lodger | — | Iowa |
| 45 | Lois Anderson | 22 | Lodger | Waitress | Minnesota |
| 46 | William Dotter | 36 | Head | Carpenter | Iowa |
| 47 | Leola Dotter | 27 | Wife | — | Iowa |
| 48 | Patricia Dotter | 7 | Daughter | — | Iowa |
| 49 | Donald Dotter | 4 | Son | — | Iowa |
| 50 | Thomas Huff | 74 | Head | — | Ohio |
| 51 | Jane Huff | 69 | Wife | — | Michigan |
| 52 | Leo Inderwiller | 42 | Head | Clerk | Iowa |
| 53 | Bessie Inderwiller | 34 | Wife | — | Iowa |
| 54 | Richard Inderwiller | 15 | Son | — | Iowa |
| 55 | Kate Bellows | 55 | Head | — | Iowa |
| 56 | Wendell Bellows | 25 | Son | Laborer | Iowa |
| 57 | Max Bellows | 20 | Son | Janitor | Iowa |
| 58 | Helen Bellows | 18 | Daughter | — | Iowa |
| 59 | Beoletta Bellows | 16 | Daughter | — | Iowa |
| 60 | Margaret Mccracken | 84 | Head | — | Pennsylvania |
| 61 | Bertha Thomas THIS PERSON | 60 | Daughter | — | Kansas |
| 62 | Robert Durand | 38 | Head | 5 | Iowa |
| 63 | Rose Durand | 28 | Wife | Waitress | Iowa |
| 64 | Ossie Durand | 9 | Daughter | — | Iowa |
| 65 | Darlene Durand | 8 | Daughter | — | Iowa |
| 66 | Layne Durand | 7 | Son | — | Iowa |
| 67 | Elizabeth Shiller | 70 | Head | — | Iowa |
| 68 | Archie Raymond | 46 | Head | Laborer | Minnesota |
| 69 | Cora Raymond | 41 | Wife | — | Iowa |
| 70 | Eileen Raymond | 16 | Daughter | — | Iowa |
| 71 | Walter Raymond | 14 | Son | — | Iowa |
| 72 | Alice Raymond | 13 | Daughter | — | Iowa |
| 73 | Betty Raymond | 11 | Daughter | — | Iowa |
| 74 | Minnie Stock | 40 | Lodger | — | Minnesota |
| 75 | Elmer Stock | 14 | Lodger | — | Iowa |
| 76 | Ivan Stock | 8 | Lodger | — | Iowa |
| 77 | Florence Woodling | 53 | Head | — | Iowa |
| 78 | Pat Daily | 26 | Lodger | — | Iowa |
| 79 | Fred Diehl | 85 | Head | — | Germany |
| 80 | Arthur Sullivan | 72 | Head | Expressman | Missouri |
Related Census Records
Pedigree Summary
Bertha
Gen 1 · 1 parents
~0.92
Max depth 4 (1900–1950 window)
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)