RT
Ruth Thomas — 1940 US Census Record
Model Tree available1940 United States Federal Census · Jasper-County, Iowa
Our Model Tree links this Ruth Thomas across the 1920, 1930 and 1940 US Censuses in Jasper-County, Iowa (XGBoost, ~Confirmed), with identified parents David & Dana — first a daughter (b.~1912), then head of a 3-person household.
Age 28
b. ~1912
Female
Daughter
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Jasper-County, Iowa |
| Surname | Thomas |
| Given Name | Ruth |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 28 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Colfax City |
| 1935 Residence (County) | Jasper |
| Additional Details | |
| Occupation | Steno. |
| Industry | Mortgage Corp. |
| Class of Worker | PW |
| Hours Worked | 20 |
| Income (1939) | 236 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Steno. |
| Township / Ward | Colfax City |
| Est. Birth Year | ~1912 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Ruth | Age | Birth yr |
|---|---|---|---|---|
| Ruth Thomas | Daughter | — | 28 | ~1912 |
| Dana Thomas | Head | — | 69 | ~1871 |
| Margaret Thomas | Spouse | — | 65 | ~1875 |
Census Appearances
1920
Jasper, Iowa
Daughter, age 7
Jasper, Iowa · implied b. ~1913 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thomas |
| Given Name | Ruth |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 7 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Speaks English | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Jasper, Iowa
Daughter, age 18
Jasper, Iowa · implied b. ~1912 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thomas |
| Given Name | Ruth |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Wales |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Jasper-County, Iowa
Daughter, age 28
Jasper-County, Iowa · implied b. ~1912 — 3 household members
| Surname | Thomas |
| Given Name | Ruth |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 28 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Colfax City |
| 1935 Residence (County) | Jasper |
| Occupation | Steno. |
| Industry | Mortgage Corp. |
| Class of Worker | PW |
| Hours Worked | 20 |
| Income (1939) | 236 |
| Highest Grade | Hs 4 |
| 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 Ruth Thomas across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father David Thomas (~0.92 confidence) and father Dana Thomas (~0.92 confidence) and mother Margaret Thomas (~0.92 confidence) and father James Thomas (~0.92 confidence) and mother Rosetta Thomas (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
David Thomas
b. ~1871
Source father
● Household
· direct · ~0.92
Father
Dana Thomas
b. ~1871
Source father
● Household
· direct · ~0.92
Mother
Margaret Thomas
b. ~1875
Source mother
● Household
· direct · ~0.92
Father
James Thomas
b. ~1879
Source father
● Household
· direct · ~0.92
Mother
Rosetta Thomas
b. ~1880
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Ruth Thomas
Daughter · 1940 · age 28 · b. ~1912 · 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 — Jasper-County, Iowa
Open full size
1940 US Federal Census — Jasper-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01169-00406)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Annie Eunice Annis | 13 | Daughter | — | Iowa |
| 2 | Joyce Annis | 7 | Daughter | — | Iowa |
| 3 | Herman Harter | 58 | Head | Mechanic | Iowa |
| 4 | Violet R Harter | 22 | Daughter | Stenographer | Iowa |
| 5 | Robert E Harter | 13 | Son | — | Iowa |
| 6 | Frank Willey | 80 | Head | — | England |
| 7 | Sarah Willey | 78 | Wife | — | England |
| 8 | Arthur Vaughan | 29 | Head | Mill-Worker | Iowa |
| 9 | Madeline Vaughan | 29 | Wife | — | Iowa |
| 10 | Joseph Naishitt | 77 | Head | — | England |
| 11 | Maria Naishitt | 72 | Wife | — | England |
| 12 | John Naishitt | 34 | Son | Coal Miner | Iowa |
| 13 | Henry Darrock | 49 | Head | Coal Miner | Scotland |
| 14 | Sarah Darrock | 68 | Wife | — | Wales |
| 15 | Oliver Darrock | 27 | Son | Coal Miner | Iowa |
| 16 | Russell Patterson | 38 | Head | Labor | Iowa |
| 17 | Rosa Patterson | 38 | Wife | — | Oklahoma |
| 18 | Kenneth Patterson | 13 | Son | — | Iowa |
| 19 | Julia Patterson | 12 | Daughter | — | Nebraska |
| 20 | Doris Patterson | 10 | Daughter | — | Nebraska |
| 21 | Raymond Patterson | 8 | Son | — | Nebraska |
| 22 | Lois Patterson | 7 | Daughter | — | Iowa |
| 23 | Jane Patterson | 5 | Daughter | — | Iowa |
| 24 | Donald Patterson | 2 | Son | — | Iowa |
| 25 | Ralph Patterson | 1 | Son | — | Iowa |
| 26 | Loren Broughton | 51 | Head | Labor | Iowa |
| 27 | Herbert V Yorkey | 32 | Head | Operator | Iowa |
| 28 | Virginia L Yorkey | 23 | Wife | — | Iowa |
| 29 | Marla J Yorkey | 1 | Daughter | — | Iowa |
| 30 | Patricia A Yorkey | 0 | Daughter | — | Iowa |
| 31 | Richard Willey | 75 | Head | — | England |
| 32 | Frank Strempel | 29 | Head | Hoisting Engineer | Iowa |
| 33 | Fern Strempel | 24 | Wife | — | Iowa |
| 34 | Dana J Thomas | 69 | Head | — | Iowa |
| 35 | Margaret Thomas | 65 | Wife | — | S. Dakota |
| 36 | Ruth Thomas THIS PERSON | 28 | Daughter | Steno. | Iowa |
| 37 | Clinton D Boyd | 54 | Head | Labor | Iowa |
| 38 | Florence Boyd | 44 | Wife | — | Iowa |
| 39 | Gail D Boyd | 19 | Son | Student Helper | Iowa |
| 40 | John W Arthur | 59 | Head | Painter | Iowa |
Pedigree Summary
Ruth
Gen 1 · 5 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)