MJ
Melvin Johnson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Rock-Island-County, Illinois
Our Model Tree links this Melvin Johnson across the 1920, 1930 and 1940 US Censuses in Rock-Island-County, Illinois (XGBoost, ~Confirmed), with identified parents Oscar & Fredrecka — first a head (b.~1899), then head of a 5-person household.
Age 41
b. ~1899
Male
Head
Born: Illinois
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Rock-Island-County, Illinois |
| Surname | Johnson |
| Given Name | Melvin |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 41 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Rock Island City |
| 1935 Residence (County) | Rock Island |
| Additional Details | |
| Occupation | Machinist |
| Industry | Farm Impt Mfg Co |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1300 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Machinist |
| Township / Ward | Rock Island City |
| Est. Birth Year | ~1899 |
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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Melvin | Age | Birth yr |
|---|---|---|---|---|
| Nancy Johnson | Daughter | — | 4 | ~1936 |
| Melvin Johnson | Head | — | 41 | ~1899 |
| Gary Johnson | Son | — | 1 | ~1939 |
| William Johnson | Son | — | 17 | ~1923 |
| Rena Johnson | Spouse | — | 38 | ~1902 |
Census Appearances
1920
Rock Island, …
Son, age 24
Rock Island, Illinois · implied b. ~1896 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Melvin F. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | Bench Work |
| Industry | Government Arsenal |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Swedish |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Rock Island, …
Head, age 33
Rock Island, Illinois · implied b. ~1897 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Melvin S. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 33 |
| Marital Status | Married |
| Birthplace | Illinois |
| Age at First Marriage | 24 |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | Machinist |
| Industry | Tractor Plant |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 30 |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Rock-Island-County, Illinois
Head, age 41
Rock-Island-County, Illinois · implied b. ~1899 — 5 household members
| Surname | Johnson |
| Given Name | Melvin |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 41 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Rock Island City |
| 1935 Residence (County) | Rock Island |
| Occupation | Machinist |
| Industry | Farm Impt Mfg Co |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1300 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| 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 Melvin Johnson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Oscar Johnson (~0.92 confidence) and mother Fredrecka Johnson (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Oscar Johnson
b. ~1858
Source father
● Household
· direct · ~0.92
Mother
Fredrecka Johnson
b. ~1871
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Melvin Johnson
Head · 1940 · age 41 · b. ~1899 · Illinois
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Rock-Island-County, Illinois
Open full size
1940 US Federal Census — Rock-Island-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00876-00339)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Richard A. Miller | 29 | Son | Clerk | Illinois |
| 42 | Allen F. Jr. Miller | 22 | Son | Statistician | Illinois |
| 43 | Robert C. Miller | 20 | Son | Production Dept | Illinois |
| 44 | Margaret Akins | 58 | Head | — | Illinois |
| 45 | Ruth Akins | 43 | Daughter | Musician | Illinois |
| 46 | Ann Ibarra | 21 | Lodger | Waitress | Illinois |
| 47 | Mathilda Lions | 63 | Lodger | Servant | Illinois |
| 48 | Ray Emmerson Lauper | 47 | Lodger | Interior Decorator | Iowa |
| 49 | Sherman Lange | 70 | Head | Track Foreman | Iowa |
| 50 | Anna Lange | 67 | Wife | — | Iowa |
| 51 | Alta Mccartney | 27 | Daughter | Saw Operator | Iowa |
| 52 | Donna Jean Mccartney | 9 | Daughter | — | Iowa |
| 53 | Theodore Mccartney | 7 | Son | — | Iowa |
| 54 | Emma Blakely | 70 | Head | — | Illinois |
| 55 | Charles Johnson | 67 | Head | Carpenter | Sweden |
| 56 | Mary C. Johnson | 69 | Wife | — | Sweden |
| 57 | Alton Batson | 29 | Head | Machinist | Indiana |
| 58 | Beda Batson | 21 | Wife | — | Arkansas |
| 59 | Frederick Batson | 2 | Son | — | Iowa |
| 60 | Melvin Johnson THIS PERSON | 41 | Head | Machinist | Illinois |
| 61 | Rena Johnson | 38 | Wife | — | Illinois |
| 62 | William Johnson | 17 | Son | — | Illinois |
| 63 | Nancy Johnson | 4 | Daughter | — | Illinois |
| 64 | Gary Johnson | 1 | Son | — | Illinois |
| 65 | Paul Mcclanahan | 24 | Head | Stock Clerk | Illinois |
| 66 | Irene Mcclanahan | 21 | Wife | Record Clerk | Ohio |
| 67 | John M. Carney | 50 | Head | Wholesale Salesman | Illinois |
| 68 | Josephine Carney | 42 | Wife | — | Illinois |
| 69 | Helen Carney | 21 | Daughter | Stenographer | Illinois |
| 70 | John P. Carney | 21 | Son | Switch Board Opr | Illinois |
| 71 | Josephine Auld | 84 | Mother | — | Illinois |
| 72 | James S. Fulton | 40 | Head | Retail Salesman | Iowa |
| 73 | Mary Fulton | 34 | Wife | — | Iowa |
| 74 | Sandra Fulton | 5 | Daughter | — | Iowa |
| 75 | Faye Snodgrass | 24 | Lodger | Secretarial Work | Illinois |
| 76 | John Ruch | 49 | Head | Classified Laborer | Minnesota |
| 77 | Georgia Ruch | 47 | Wife | Shipping Clerk | Iowa |
| 78 | Phyllis Ruch | 19 | Daughter | — | Illinois |
| 79 | Betty Jane Ruch | 15 | Daughter | — | Illinois |
| 80 | Philip Bee | 32 | Lodger | Inspector | Illinois |
Pedigree Summary
Melvin
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 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)