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Helen Hoffman — 1940 US Census Record
Model Tree available1940 United States Federal Census · Black-Hawk-County, Iowa
Our Model Tree links this Helen Hoffman across the 1920, 1930 and 1940 US Censuses in Black-Hawk-County, Iowa (XGBoost, ~Confirmed), with identified parents J & Peter — first a daughter (b.~1914), then head of a 6-person household.
Age 26
b. ~1914
Female
Daughter
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Black-Hawk-County, Iowa |
| Surname | Hoffman |
| Given Name | Helen L. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 26 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | West Waterloo Twp |
| 1935 Residence (County) | Black Hawk |
| Additional Details | |
| Occupation | press operator |
| Industry | Laundry |
| Class of Worker | PW |
| Hours Worked | 50 |
| Income (1939) | 400 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same house |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Press Operator |
| Township / Ward | West Waterloo Twp |
| Est. Birth Year | ~1914 |
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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Helen | Age | Birth yr |
|---|---|---|---|---|
| Genevieve Hoffman | Daughter | — | 22 | ~1918 |
| Lois Hoffman | Daughter | — | 12 | ~1928 |
| Rosalia Hoffman | Spouse | — | 57 | ~1883 |
| Peter Hoffman | Head | — | 56 | ~1884 |
| Helen Hoffman | Daughter | — | 26 | ~1914 |
| Paul Hoffman | Son | — | 20 | ~1920 |
Census Appearances
1920
Black Hawk, …
Daughter, age 5
Black Hawk, Iowa · implied b. ~1915 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hoffman |
| Given Name | Helen |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Black Hawk, …
Daughter, age 15
Black Hawk, Iowa · implied b. ~1915 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hoffman |
| Given Name | Helen M. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Black-Hawk-County, Iowa
Daughter, age 26
Black-Hawk-County, Iowa · implied b. ~1914 — 6 household members
| Surname | Hoffman |
| Given Name | Helen L. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 26 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | West Waterloo Twp |
| 1935 Residence (County) | Black Hawk |
| Occupation | press operator |
| Industry | Laundry |
| Class of Worker | PW |
| Hours Worked | 50 |
| Income (1939) | 400 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same house |
| 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 Helen Hoffman across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father J Hoffman (~0.92 confidence) and father Peter Hoffman (~0.92 confidence) and father Peter Hoffman (~0.92 confidence) and mother Irene Hoffman (~0.92 confidence) and mother Rosalia Hoffman (~0.92 confidence) and mother Rosalie Hoffman (~0.92 confidence). The pedigree spans 1 generation with 6 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
J Hoffman
b. ~1883
Source father
● Household
· direct · ~0.92
Father
Peter Hoffman
b. ~1884
Source father
● Household
· direct · ~0.92
Father
Peter Hoffman
b. ~1884
Source father
● Household
· direct · ~0.92
Mother
Irene Hoffman
b. ~1890
Source mother
● Household
· direct · ~0.92
Mother
Rosalia Hoffman
b. ~1883
Source mother
● Household
· direct · ~0.92
Mother
Rosalie Hoffman
b. ~1890
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Helen Hoffman
Daughter · 1940 · age 26 · b. ~1914 · Iowa
★ You are viewing this record
Sibling
Paul Hoffman
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Genevieve Hoffman
Sibling · 1940 · age 22
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lois Hoffman
Sibling · 1940 · age 12
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 — Black-Hawk-County, Iowa
Open full size
1940 US Federal Census — Black-Hawk-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01139-01480)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Vernon E. Whited | 23 | Son | Butcher | Nebraska |
| 2 | Leslie H. Whited | 20 | Son | Laborer | Iowa |
| 3 | Harold Rone | 31 | Head | Painting | North Dakota |
| 4 | Phyllis Rone | 28 | Wife | — | Iowa |
| 5 | Fred A. Richmond | 30 | Head | Machinist | Oklahoma |
| 6 | William H. Howrey | 71 | Head | Salesman | Iowa |
| 7 | Pansy T. Howrey | 66 | Wife | — | Iowa |
| 8 | Vera M. Moser | 41 | Head | — | Iowa |
| 9 | June L. Moser | 15 | Daughter | — | Iowa |
| 10 | Ewald L. Bast | 25 | Head | Truck Driver | Iowa |
| 11 | Marian Bast | 18 | Wife | — | Iowa |
| 12 | Judy Jean Bast | 0 | Daughter | — | Iowa |
| 13 | Arthur O. Siler | 60 | Head | Farming | Missouri |
| 14 | Mary R. Siler | 58 | Wife | — | Illinois |
| 15 | Leonard L. Siler | 31 | Head | Heat Treater | Missouri |
| 16 | Genevieve E. Siler | 25 | Wife | — | Iowa |
| 17 | Marilyn J. Siler | 3 | Daughter | — | Iowa |
| 18 | Merrill A. Siler | 0 | Daughter | — | Iowa |
| 19 | Peter S. Hoffman | 56 | Head | Farming | Iowa |
| 20 | Rosalia M. Hoffman | 57 | Wife | — | Iowa |
| 21 | Helen L. Hoffman THIS PERSON | 26 | Daughter | Press Operator | Iowa |
| 22 | Genevieve M. Hoffman | 22 | Daughter | Laundress | Iowa |
| 23 | Paul L. Hoffman | 20 | Son | — | Iowa |
| 24 | Lois L. Hoffman | 12 | Daughter | — | Iowa |
| 25 | Harold Jensen | 31 | Head | Farming | Denmark |
| 26 | Edith M. Jensen | 25 | Wife | — | Iowa |
| 27 | Donald E. Jensen | 4 | Son | — | Iowa |
| 28 | Fred Rathbun | 57 | Father-in-law | Farming | Iowa |
| 29 | Ray D. Morley | 26 | Head | Truck Driver | Iowa |
| 30 | Kathrene E. Morley | 23 | Wife | — | Iowa |
| 31 | Fred G. Bolton | 61 | Head | Laborer | Iowa |
| 32 | Elizabeth L. Bolton | 58 | Wife | — | Indiana |
| 33 | Robert P. Zein | 24 | Head | Trucker | Iowa |
| 34 | Velma M. Zein | 23 | Wife | — | Iowa |
| 35 | Joleene M. Zein | 1 | Daughter | — | Iowa |
| 36 | Frank E. Wight | 46 | Head | Janitor | South Dakota |
| 37 | Jean S. Wight | 44 | Wife | — | Indiana |
| 38 | Maurice W. Moltenmion | 27 | Head | Laborer | North Dakota |
| 39 | Elda M. Moltenmion | 26 | Wife | — | Iowa |
| 40 | Clarence Gleaner | 35 | Head | Shipping Clerk | Iowa |
Pedigree Summary
Helen + 3 siblings
Gen 1 · 6 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)