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William Frederick — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Clayton-County, Iowa
Our Model Tree links this William Frederick across the 1930 and 1940 US Censuses in Clayton-County, Iowa (XGBoost, ~Confirmed) — first a son (b.~1926), then head of a 7-person household.
Age 14
b. ~1926
Male
Son
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Clayton-County, Iowa |
| Surname | Frederick |
| Given Name | William Jr |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Strawberry Point City |
| 1935 Residence (County) | Clayton |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | No 6 |
| 1935 Residence | Same house |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Township / Ward | Strawberry Point City |
| 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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| Raymond Frederick | Son | — | 10 | ~1930 |
| William Frederick | Son | — | 14 | ~1926 |
| Donna Frederick | Daughter | — | 15 | ~1925 |
| William Frederick | Head | — | 48 | ~1892 |
| Emma Frederick | Spouse | — | 45 | ~1895 |
| Gladys Frederick | Daughter | — | 17 | ~1923 |
| Arnold Frederick | Son | — | 12 | ~1928 |
Census Appearances
1930
Clayton, Iowa
Son, age 4
Clayton, Iowa · implied b. ~1926 — 11 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Frederick |
| Given Name | William A. |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Occupation | none |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Clayton-County, Iowa
Son, age 14
Clayton-County, Iowa · implied b. ~1926 — 7 household members
| Surname | Frederick |
| Given Name | William Jr |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Strawberry Point City |
| 1935 Residence (County) | Clayton |
| Income (1939) | 0 |
| Highest Grade | No 6 |
| 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 William Frederick across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
William Frederick
Son · 1940 · age 14 · b. ~1926 · Iowa
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Sibling
Arnold Frederick
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Donna Frederick
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Raymond Frederick
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Gladys Frederick
Sibling · 1940 · age 17
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 — Clayton-County, Iowa
Open full size
1940 US Federal Census — Clayton-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01149-00115)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Kate Hebron | 50 | wife | — | Iowa |
| 2 | Chris Metzger | 67 | Head | Butcher | Iowa |
| 3 | Ella Metzger | 64 | wife | — | Iowa |
| 4 | Emil W Metzger | 19 | son | — | Iowa |
| 5 | Clifford Metzger | 39 | son | Pool Hall Head | Iowa |
| 6 | Donald Thurner | 24 | Head | Gasoline Station Operator | Iowa |
| 7 | Dorothy Thurner | 23 | wife | — | South Dakota |
| 8 | Marian Thurner | 5 | daughter | — | Iowa |
| 9 | Le Verne Dalen | 44 | Head | Truck Driver | Wisconsin |
| 10 | Genevieve Dalen | 43 | wife | — | Iowa |
| 11 | Donna Mae Dalen | 18 | daughter | — | Iowa |
| 12 | Rita Maxine Dalen | 17 | daughter | Teaching | Iowa |
| 13 | Mary Lou Dalen | 12 | daughter | — | Iowa |
| 14 | Vincent J Dalen | 10 | son | — | Iowa |
| 15 | Robert L Dalen | 8 | son | — | Iowa |
| 16 | Pyeo Hall | 72 | wife father | — | Iowa |
| 17 | Margaret Hall | 73 | wife mother | — | Iowa |
| 18 | Bridget Hogan | 74 | lodger | Tailoress | Iowa |
| 19 | Pete Wilhelm | 37 | Head | Farming | Iowa |
| 20 | Donna Wilhelm | 31 | wife | — | Iowa |
| 21 | Dorothy Wilhelm | 10 | daughter | — | Minnesota |
| 22 | Carol Lee Wilhelm | 8 | daughter | — | Missouri |
| 23 | Robert Wilhelm | 5 | son | — | Iowa |
| 24 | Ronald Wilhelm | 2 | son | — | Iowa |
| 25 | Emery Malone | 54 | Head | Day Labor | Iowa |
| 26 | Dolly Malone | 53 | wife | — | Iowa |
| 27 | Bernida Malone | 20 | daughter | — | Iowa |
| 28 | Ernest Kluender | 36 | Head | Oil Truck | Iowa |
| 29 | Helen Kluender | 28 | wife | — | Iowa |
| 30 | James L Kluender | 2 | son | — | Iowa |
| 31 | Laura A Kluender | 1 | daughter | — | Iowa |
| 32 | Harley Hawks | 77 | Head | — | Iowa |
| 33 | William Frederick | 48 | Head | Implement | Iowa |
| 34 | Emma Frederick | 45 | wife | — | Iowa |
| 35 | Gladys Frederick | 17 | daughter | — | Iowa |
| 36 | Donna M Frederick | 15 | daughter | — | Iowa |
| 37 | William Jr Frederick THIS PERSON | 14 | son | — | Iowa |
| 38 | Arnold Frederick | 12 | son | — | Iowa |
| 39 | Raymond Frederick | 10 | son | — | Iowa |
| 40 | Otto H J Fuelner | 50 | Head | Hardware Store | Iowa |
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)