JJ
John Jacobson — 1920 US Census Record
Model Tree available1920 United States Federal Census · Shelby, Iowa
Our Model Tree links this John Jacobson across the 1920, 1930 and 1940 US Censuses in Shelby, Iowa (XGBoost, ~Confirmed), with identified parents William & William — first a son (b.~1912), then head of a 8-person household.
Age 8
b. ~1912
Male
Son
Born: Iowa
Single
1920 Census Record Details
| Census Year | 1920 |
| Location | Shelby, Iowa |
| Surname | Jacobson |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 8 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Denmark |
| Mother's Birthplace | Iowa |
| Additional Details | |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Township / Ward | Center Township |
| 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.
8 people recorded at the same address in the 1920 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Hulda Jacobson | Spouse | — | 31 | ~1889 |
| Mathilda Jacobson | Daughter | — | 2 | ~1918 |
| Gloria Jacobson | Daughter | — | 4 | ~1916 |
| Mary Jacobson | Daughter | — | 6 | ~1914 |
| William Jacobson | Head | — | 31 | ~1889 |
| Irene Jacobson | Daughter | — | ~1920 | |
| John Jacobson | Son | — | 8 | ~1912 |
| Peter Nelson | Other | — | 32 | ~1888 |
Census Appearances
1920
Shelby, Iowa
Son, age 8
Shelby, Iowa · implied b. ~1912 — 8 household members
| Surname | Jacobson |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 8 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Denmark |
| Mother's Birthplace | Iowa |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Shelby, Iowa
Son, age 18
Shelby, Iowa · implied b. ~1912 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Jacobsen |
| Given Name | John J |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Denmark |
| Mother's Birthplace | Iowa |
| Occupation | Laborer |
| Industry | Farm |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Shelby-County, Iowa
Son, age 29
Shelby-County, Iowa · implied b. ~1911 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Jacobsen |
| Given Name | John H |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 29 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Shelby |
| Occupation | Laborer |
| Industry | Farm |
| Class of Worker | PW |
| Hours Worked | 60 |
| Income (1939) | 150 |
| Highest Grade | No 8 |
| 1935 Residence | Iowa |
| 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 John Jacobson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father William Jacobson (~0.92 confidence) and father William Jacobsen (~0.92 confidence) and mother Hulda Jacobson (~0.92 confidence) and mother Matilda Jacobsen (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
William Jacobson
b. ~1889
Source father
● Household
· direct · ~0.92
Father
William Jacobsen
b. ~1889
Source father
● Household
· direct · ~0.92
Mother
Hulda Jacobson
b. ~1889
Source mother
● Household
· direct · ~0.92
Mother
Matilda Jacobsen
b. ~1889
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Jacobson
Son · 1920 · age 8 · b. ~1912 · Iowa
★ You are viewing this record
Sibling
Gloria Jacobson
Sibling · 1920 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mathilda Jacobson
Sibling · 1920 · age 2
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Irene Jacobson
Sibling · 1920 · age
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Jacobson
Sibling · 1920 · age 6
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 — Shelby, Iowa
Open full size
1920 US Federal Census — Shelby, Iowa
Page Contents
50 people indexed on this census page (ia:1920:14thcensusofpopu513unit:0564)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Frances | 17 | Daughter | — | Iowa |
| 2 | Jessie | 32 | Sister | Servant | Iowa |
| 3 | Enoch Ockes | 39 | Head | Farmer | Iowa |
| 4 | Lena Ockes | 36 | Wife | — | Iowa |
| 5 | Harold Ockes | 13 | Son | — | Iowa |
| 6 | Harvey Ockes | 11 | Son | — | Iowa |
| 7 | George Ockes | 7 | Son | — | Iowa |
| 8 | Andrew Denison | 46 | Head | Farmer | Iowa |
| 9 | Charlotte Denison | 43 | Wife | — | Nebraska |
| 10 | Forest Denison | 6 | Son | — | Iowa |
| 11 | Emery Johnson | 41 | Head | Farmer | Wisconsin |
| 12 | Bessie Johnson | 37 | Wife | — | United States |
| 13 | Faye Johnson | 3 | Son | — | Iowa |
| 14 | Bernice Johnson | 0 | Daughter | — | Iowa |
| 15 | Marius Lindberg | 31 | Head | Farmer | Denmark |
| 16 | Elmer Johnson | 38 | Head | Farmer | Iowa |
| 17 | Christine Johnson | 37 | Wife | — | Iowa |
| 18 | Gerald Johnson | 15 | Son | — | Iowa |
| 19 | Melvin Johnson | 13 | Son | — | Iowa |
| 20 | Cecil Johnson | 12 | Daughter | — | Iowa |
| 21 | Elsie Johnson | 10 | Daughter | — | Iowa |
| 22 | Everett Johnson | 6 | Son | — | Iowa |
| 23 | Dale Johnson | 2 | Son | — | Iowa |
| 24 | Thomas Faggins | 30 | Head | Farmer | Kansas |
| 25 | Agnes Faggins | 29 | Wife | — | Kansas |
| 26 | Burrell Faggins | 12 | Son | — | Kansas |
| 27 | Dallas Faggins | 10 | Son | — | Kansas |
| 28 | Duane Faggins | 3 | Son | — | Kansas |
| 29 | Eleonore Faggins | 1 | Daughter | — | Iowa |
| 30 | Katy Anthony | 53 | Head | Farmer | Denmark |
| 31 | Roy Anthony | 12 | Son | — | Iowa |
| 32 | Frank Debord | 47 | Head | Farmer | Illinois |
| 33 | Charlotte Debord | 37 | Wife | — | Iowa |
| 34 | Leiter Debord | 10 | Son | — | Iowa |
| 35 | Carl Carlson | 42 | Head | Farmer | Denmark |
| 36 | Dagmar Carlson | 36 | Wife | — | Wisconsin |
| 37 | Vanilla Carlson | 15 | Daughter | — | Iowa |
| 38 | Arnold Carlson | 13 | Son | — | Iowa |
| 39 | Halvor Carlson | 11 | Son | — | Iowa |
| 40 | Mildred Carlson | 2 | Son | — | Iowa |
| 41 | Thelma Carlson | 0 | Daughter | — | Iowa |
| 42 | William Jacobson | 31 | Head | Farmer | Denmark |
| 43 | Hulda Jacobson | 31 | Wife | — | Iowa |
| 44 | John Jacobson THIS PERSON | 8 | Son | — | Iowa |
| 45 | Mary Jacobson | 6 | Daughter | — | Iowa |
| 46 | Gloria Jacobson | 4 | Daughter | — | Iowa |
| 47 | Mathilda Jacobson | 2 | Daughter | — | Iowa |
| 48 | Irene Jacobson | 0 | Daughter | — | Iowa |
| 49 | Peter Nelson | 32 | Hired Hand | Laborer | Denmark |
| 50 | Orville Heflin | 48 | Head | Farmer | Illinois |
Pedigree Summary
John + 4 siblings
Gen 1 · 4 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)