MJ
Martin Johnson — 1930 US Census Record
Model Tree available1930 United States Federal Census · Rock Island, Illinois
Our Model Tree links this Martin Johnson across the 1920, 1930 and 1940 US Censuses in Rock Island, Illinois (XGBoost, ~Confirmed), with identified parents Emily & Emma — first a son (b.~1895), then head of a 2-person household.
Age 35
b. ~1895
Male
Son
Born: Illinois
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Rock Island, Illinois |
| Surname | Johnson |
| Given Name | Martin |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 35 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Additional Details | |
| Occupation | Laborer |
| Industry | Harness Shop |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Laborer |
| Township / Ward | Moline City |
| Est. Birth Year | ~1895 |
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.
2 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Martin | Age | Birth yr |
|---|---|---|---|---|
| Emily Johnson | Head | — | 78 | ~1852 |
| Martin Johnson | Son | — | 35 | ~1895 |
Census Appearances
1920
Rock Island, …
Son, age 25
Rock Island, Illinois · implied b. ~1895 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Martin W |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | shipper |
| Industry | factory |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Rock Island, …
Son, age 35
Rock Island, Illinois · implied b. ~1895 — 2 household members
| Surname | Johnson |
| Given Name | Martin |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 35 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | Laborer |
| Industry | Harness Shop |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Rock-Island-County, Illinois
Head, age 46
Rock-Island-County, Illinois · implied b. ~1894
●
Primary link
· ~Confirmed · 1 source
XGBoost
| Surname | Johnson |
| Given Name | Marten |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 46 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Moline |
| 1935 Residence (County) | Rock Island |
| Occupation | Laborer |
| Industry | Farm Mach Mfg |
| Class of Worker | PW |
| Hours Worked | 52 |
| Income (1939) | 570 |
| Highest Grade | No 8 |
| 1935 Residence | Same house |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
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 Martin Johnson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Emily Johnson (~0.92 confidence) and mother Emma Johnson (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Emily Johnson
b. ~1852
Source mother
● Household
· direct · ~0.92
Mother
Emma Johnson
b. ~1853
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Martin Johnson
Son · 1930 · age 35 · b. ~1895 · Illinois
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1930 US Federal Census — Rock Island, Illinois
Open full size
1930 US Federal Census — Rock Island, Illinois
Page Contents
50 people indexed on this census page (ia:1930:illinoiscensus00reel552:0705)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Sophia Sohlberg | 24 | Wife-H | — | Illinois |
| 2 | Betty Lou Sohlberg | 2 | Daughter | — | Illinois |
| 3 | Edward Deller | 45 | Head | Assembler | Wisconsin |
| 4 | Catherine Deller | 42 | Wife-H | — | Wisconsin |
| 5 | Clarence Deller | 23 | Son | Apprentice | Wisconsin |
| 6 | Ethel Deller | 20 | Daughter | — | Iowa |
| 7 | Billy G Deller | 3 | Grandson | — | Illinois |
| 8 | Carl Sohlberg | 22 | Head | — | Sweden |
| 9 | Betty Sohlberg | 23 | Wife-H | — | Sweden |
| 10 | Louis Cohns | 67 | Head | Broker | Russia |
| 11 | Rebecca Cohns | 60 | Wife-H | — | Russia |
| 12 | William Richardson | 36 | Head | Watchman | Illinois |
| 13 | Omine Richardson | 31 | Wife-H | — | Illinois |
| 14 | Robert Richardson | 14 | Son | — | Illinois |
| 15 | Lucille Richardson | 11 | Daughter | — | Illinois |
| 16 | William J Richardson | 82 | Father | — | Indiana |
| 17 | Joseph Humble | 61 | Head | Canvassing | Austria |
| 18 | Mary Humble | 58 | Wife-H | — | Free State Ireland |
| 19 | Margaret Humble | 24 | Daughter | Machine Operator | Illinois |
| 20 | Le Roy Humble | 23 | Son | Laborer | Illinois |
| 21 | Helen Humble | 21 | Daughter | Proofreader | Illinois |
| 22 | Thomas Humble | 19 | Son | Machinist Helper | Illinois |
| 23 | Mary Humble | 15 | Daughter | — | Illinois |
| 24 | Roy R Moody | 36 | Head | Salesman | Tennessee |
| 25 | Mary F Moody | 26 | Wife-H | — | Illinois |
| 26 | Hugh S Moody | 10 | Son | — | Illinois |
| 27 | Winifred Moody | 8 | Daughter | — | Illinois |
| 28 | Alfred Chezin | 43 | Head | Coal Miner | Missouri |
| 29 | Mary C Chezin | 27 | Wife-H | Saleslady | Illinois |
| 30 | Pearl G Chezin | 22 | Son | Inspector Helper | Illinois |
| 31 | Isabelle Chezin | 16 | Daughter | — | Kansas |
| 32 | Mary Ruth Chezin | 7 | Daughter | — | Illinois |
| 33 | Clair Root | 24 | Head | Heater | Missouri |
| 34 | E. Till Root | 29 | Wife-H | — | Missouri |
| 35 | Alice J Root | 2 | Daughter | — | Missouri |
| 36 | Duane L Root | 0 | Son | — | Illinois |
| 37 | Emily M Johnson | 78 | Head | — | Sweden |
| 38 | Martin Johnson THIS PERSON | 35 | Son | Laborer | Illinois |
| 39 | Fern Williamson | 35 | Head-H | Proprietor | Missouri |
| 40 | Thura G Anderson | 21 | Lodger | Machinist | Sweden |
| 41 | Gustaf C Sjoblom | 44 | Lodger | Machinist | Sweden |
| 42 | Frederic J Beck | 47 | Lodger | Machinist | Iowa |
| 43 | Frank O Danielson | 20 | Lodger | Laborer | Sweden |
| 44 | A Hjalmar Gustafson | 26 | Lodger | Cabinetmaker | Norway |
| 45 | Archie M Kauffle | 45 | Head | Hunter | Illinois |
| 46 | Belle L Kauffle | 46 | Wife-H | — | Illinois |
| 47 | Vaughn Westerfield | 37 | Head | Purchasing Agent | Illinois |
| 48 | Irene Westerfield | 36 | Wife-H | — | Illinois |
| 49 | Jack M Westerfield | 10 | Son | — | Illinois |
| 50 | Kathryn Westerfield | 8 | Daughter | — | Illinois |
Pedigree Summary
Martin
Gen 1 · 2 parents
~0.92
Max depth 4 (1900–1950 window)
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1930 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)