CP
Clarence Peterson — 1920 US Census Record
Model Tree available1920 United States Federal Census · Black Hawk, Iowa
Our Model Tree links this Clarence Peterson across the 1920, 1930 and 1940 US Censuses in Black Hawk, Iowa (XGBoost, ~Confirmed), with identified parents Adolph & John — first a son (b.~1916), then head of a 9-person household.
Age 4
b. ~1916
Male
Son
Born: Iowa
Single
1920 Census Record Details
| Census Year | 1920 |
| Location | Black Hawk, Iowa |
| Surname | Peterson |
| Given Name | Clarence |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Additional Details | |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Township / Ward | Lincoln Township |
| Est. Birth Year | ~1916 |
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.
9 people recorded at the same address in the 1920 census.
| Name | Relation to head | Relative to Clarence | Age | Birth yr |
|---|---|---|---|---|
| Hazel Peterson | Daughter | — | 7 | ~1913 |
| Clarence Peterson | Son | — | 4 | ~1916 |
| Lizzie Peterson | Daughter | — | 10 | ~1910 |
| John Peterson | Head | — | 42 | ~1878 |
| Bertha Peterson | Spouse | — | 32 | ~1888 |
| Lizzie Sell | Other | — | 20 | ~1900 |
| Leona Peterson | Daughter | — | 8 | ~1912 |
| Laverne Peterson | Daughter | — | 1 | ~1919 |
| Lenora Peterson | Daughter | — | 3 | ~1917 |
Census Appearances
1920
Black Hawk, …
Son, age 4
Black Hawk, Iowa · implied b. ~1916 — 9 household members
| Surname | Peterson |
| Given Name | Clarence |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 4 |
| 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, …
Son, age 15
Black Hawk, Iowa · implied b. ~1915 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Petersen |
| Given Name | Clarence |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Occupation | none |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Black-Hawk-County, Iowa
Head, age 25
Black-Hawk-County, Iowa · implied b. ~1915 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Petersen |
| Given Name | Clarence |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Lincoln Twp |
| 1935 Residence (County) | Blackhawk |
| Occupation | farm operator |
| Industry | farm |
| Class of Worker | E |
| Hours Worked | 84 |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 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 Clarence Peterson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Adolph Petersen (~0.92 confidence) and father John Peterson (~0.92 confidence) and mother Bertha Peterson (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Adolph Petersen
b. ~1877
Source father
● Household
· direct · ~0.92
Father
John Peterson
b. ~1878
Source father
● Household
· direct · ~0.92
Mother
Bertha Peterson
b. ~1888
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Clarence Peterson
Son · 1920 · age 4 · b. ~1916 · Iowa
★ You are viewing this record
Sibling
Laverne Peterson
Sibling · 1920 · age 1
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lizzie Peterson
Sibling · 1920 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lenora Peterson
Sibling · 1920 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Hazel Peterson
Sibling · 1920 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Leona Peterson
Sibling · 1920 · age 8
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
1920 US Federal Census — Black Hawk, Iowa
Open full size
1920 US Federal Census — Black Hawk, Iowa
Page Contents
50 people indexed on this census page (ia:1920:14thcensusofpopu478unit:0293)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Ross Lowell | 4 | Son | — | Iowa |
| 52 | Marion Lowell | 1 | Daughter | — | Iowa |
| 53 | James Kubik | 28 | Head | Farmer | Iowa |
| 54 | Inez Kubik | 20 | Wife | — | Iowa |
| 55 | Joe Dornsky | 36 | Hired man | Laborer | Bohemia |
| 56 | John F. Peterson | 42 | Head | Farmer | Iowa |
| 57 | Bertha Peterson | 32 | Wife | — | Iowa |
| 58 | Lizzie Peterson | 10 | Daughter | — | Iowa |
| 59 | Leona Peterson | 8 | Daughter | — | Iowa |
| 60 | Hazel Peterson | 7 | Daughter | — | Iowa |
| 61 | Clarence Peterson THIS PERSON | 4 | Son | — | Iowa |
| 62 | Lenora Peterson | 3 | Daughter | — | Iowa |
| 63 | Laverne Peterson | 1 | Daughter | — | Iowa |
| 64 | Lizzie Sell | 20 | Servant | Servant | Iowa |
| 65 | Severin Danielson | 32 | Head | Farmer | Denmark |
| 66 | Dorthy Danielson | 27 | Wife | — | Iowa |
| 67 | Ava Danielson | 1 | Daughter | — | Iowa |
| 68 | Nels C. Jacobsen | 65 | Boarder | — | Denmark |
| 69 | Fred Stueas | 24 | Head | Farmer | Wisconsin |
| 70 | Clara Stueas | 50 | Mother | — | Illinois |
| 71 | Mildred Stueas | 15 | Sister | — | Iowa |
| 72 | Guy Ferguson | 17 | Hired man | Laborer | Kentucky |
| 73 | Toby Getson | 29 | Head | Farmer | Denmark |
| 74 | Martine Getson | 21 | Wife | — | Denmark |
| 75 | Marion Getson | 1 | Daughter | — | Iowa |
| 76 | Jacob Jacobsen | 33 | Boarder | Farmer | Denmark |
| 77 | James Kubik | 32 | Head | Farmer | Iowa |
| 78 | Gracie Kubik | 31 | Wife | — | Iowa |
| 79 | Lillian Kubik | 6 | Daughter | — | Iowa |
| 80 | Lester Kubik | 3 | Son | — | Iowa |
| 81 | Helen Kubik | 1 | Daughter | — | Iowa |
| 82 | Amal Dedie | 17 | Hired man | Laborer | Bohemia |
| 83 | James H. Myres | 29 | Head | Farmer | Iowa |
| 84 | Lillie Myres | 25 | Wife | — | Kansas |
| 85 | Lalliga Myres | 4 | Daughter | — | Iowa |
| 86 | Dorthy Myres | 0 | Daughter | — | Iowa |
| 87 | Andrew Christoffersen | 40 | Head | Farmer | Denmark |
| 88 | Julia Christoffersen | 29 | Wife | — | Denmark |
| 89 | Helen Christoffersen | 8 | Daughter | — | Iowa |
| 90 | Charles Christoffersen | 6 | Son | — | Iowa |
| 91 | Jennie Christoffersen | 4 | Daughter | — | Iowa |
| 92 | George Svendsen | 36 | Head | Laborer | Denmark |
| 93 | Christine Svendsen | 26 | Wife | — | Denmark |
| 94 | Annie Svendsen | 0 | Daughter | — | Iowa |
| 95 | Edna Svendsen | 2 | Daughter | — | Iowa |
| 96 | Luther J. Whited | 50 | Head | Farmer | Ohio |
| 97 | Ethel Whited | 26 | Daughter | — | Ohio |
| 98 | Hugh Whited | 22 | Son | Laborer | Ohio |
| 99 | Walter Whited | 20 | Son | Laborer | Ohio |
| 100 | Luther Jr. Whited | 17 | Son | Laborer | Ohio |
Related Census Records
Pedigree Summary
Clarence + 5 siblings
Gen 1 · 3 parents
~0.92
Max depth 4 (1900–1950 window)
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1920 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)