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Gertrude Miller — 1940 US Census Record
Model Tree available1940 United States Federal Census · Johnson-County, Iowa
Our Model Tree links this Gertrude Miller across the 1920, 1930 and 1940 US Censuses in Johnson-County, Iowa (XGBoost, ~Confirmed), with identified parents John & John — first a daughter (b.~1915), then head of a 3-person household.
Age 25
b. ~1915
Female
Daughter
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Johnson-County, Iowa |
| Surname | Miller |
| Given Name | Gertrude |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Iowa City |
| 1935 Residence (County) | Johnson |
| Additional Details | |
| Occupation | operator |
| Industry | telephone |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 420 |
| Highest Grade | No 2 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Operator |
| Township / Ward | Iowa City |
| Est. Birth Year | ~1915 |
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 Gertrude | Age | Birth yr |
|---|---|---|---|---|
| Gertrude Miller | Daughter | — | 25 | ~1915 |
| John Miller | Head | — | 73 | ~1867 |
| Theresa Miller | Spouse | — | 64 | ~1876 |
Census Appearances
1920
Johnson, Iowa
Daughter, age 6
Johnson, Iowa · implied b. ~1914 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Miller |
| Given Name | Gertrude |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 6 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Indiana |
| Mother's Birthplace | Pennsylvania |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Johnson, Iowa
Daughter, age 16
Johnson, Iowa · implied b. ~1914 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Miller |
| Given Name | Gertrude |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Indiana |
| Mother's Birthplace | Pennsylvania |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Johnson-County, Iowa
Daughter, age 25
Johnson-County, Iowa · implied b. ~1915 — 3 household members
| Surname | Miller |
| Given Name | Gertrude |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Iowa City |
| 1935 Residence (County) | Johnson |
| Occupation | operator |
| Industry | telephone |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 420 |
| Highest Grade | No 2 |
| 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 Gertrude Miller across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father John Miller (~0.92 confidence) and father John Miller (~0.92 confidence) and father John Miller (~0.92 confidence) and mother Tressie Miller (~0.92 confidence) and mother Theresa Miller (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
John Miller
b. ~1867
Source father
● Household
· direct · ~0.92
Father
John Miller
b. ~1867
Source father
● Household
· direct · ~0.92
Father
John Miller
b. ~1867
Source father
● Household
· direct · ~0.92
Mother
Tressie Miller
b. ~1876
Source mother
● Household
· direct · ~0.92
Mother
Theresa Miller
b. ~1876
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Gertrude Miller
Daughter · 1940 · age 25 · b. ~1915 · 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 — Johnson-County, Iowa
Open full size
1940 US Federal Census — Johnson-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01171-00351)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Stephen Kaefer | 12 | Son | — | Iowa |
| 2 | Robert Osburn | 25 | Head | Secretary | Indiana |
| 3 | Ruth Osburn | 22 | Wife | Secretary | New York |
| 4 | Betty Dickens | 41 | Head | Housework | Iowa |
| 5 | Richard Dickens | 16 | Son | — | Iowa |
| 6 | Alvina Dickens | 12 | Daughter | — | Iowa |
| 7 | Elizabeth Kane | 76 | Head | — | Iowa |
| 8 | Vina Tompkins | 64 | Head | Real Estate | Iowa |
| 9 | Laura Ansel | 68 | Sister | — | Iowa |
| 10 | Edith Harmel | 64 | Sister | — | Iowa |
| 11 | Frances Kadlec | 49 | Head | Pantry Cook | Iowa |
| 12 | Mary Kadlec | 20 | Daughter | Operator | Iowa |
| 13 | Edward Kadlec | 18 | Son | Salesman | Iowa |
| 14 | Raymond Kadlec | 15 | Son | — | Iowa |
| 15 | Barbara Kadlec | 13 | Daughter | — | Iowa |
| 16 | Glenn Kennedy | 25 | Head | Wholesale | Iowa |
| 17 | Frankie Kennedy | 20 | Wife | — | South Dakota |
| 18 | Nancy Kennedy | 0 | Daughter | — | Iowa |
| 19 | Charles Danber | 29 | Head | Butcher | Iowa |
| 20 | Velma Danber | 33 | Wife | — | Iowa |
| 21 | Homer Green | 32 | Head | Meat Cutter | Indiana |
| 22 | Celia Green | 49 | Wife | — | Illinois |
| 23 | Wilma Mott | 25 | Head | Operator | Iowa |
| 24 | John Miller | 73 | Head | — | Indiana |
| 25 | Theresa Miller | 64 | Wife | — | Pennsylvania |
| 26 | Gertrude Miller THIS PERSON | 25 | Daughter | Operator | Iowa |
| 27 | Frank Thomann | 75 | Head | — | Iowa |
| 28 | Harvey Thomann | 39 | Son | Barber | Iowa |
| 29 | Lucille Thomann | 32 | Daughter | — | Iowa |
| 30 | Emma Ahrens | 68 | Head | — | Iowa |
| 31 | Howard Keely | 33 | Head | — | Iowa |
| 32 | Opal Keely | 25 | Wife | — | Iowa |
| 33 | Jack Keely | 54 | Father | — | Iowa |
| 34 | Lenore Keely | 52 | Mother | Laundress | Illinois |
| 35 | Lawrence Yenauch | 43 | Lodger | Machinist | Iowa |
| 36 | Veronica Hansen | 38 | Head | — | Iowa |
| 37 | Elizabeth Hansen | 70 | Mother | — | Iowa |
| 38 | Mary Moriarty | 79 | Aunt | — | Iowa |
| 39 | Rose Schmidt | 50 | Head | — | Iowa |
| 40 | Nell Schmidt | 51 | Sister | — | Iowa |
Pedigree Summary
Gertrude
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)