MJ
Martin Johnson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Winnebago-County, Illinois
Our Model Tree links this Martin Johnson across the 1920, 1930 and 1940 US Censuses in Winnebago-County, Illinois (XGBoost, ~Confirmed), with identified parents Victor & Ida — first a head (b.~1889), then head of a 3-person household.
Age 51
b. ~1889
Male
Head
Born: Illinois
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Winnebago-County, Illinois |
| Surname | Johnson |
| Given Name | Martin |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 51 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Rockford City |
| 1935 Residence (County) | Winnebago |
| Additional Details | |
| Occupation | Dentist |
| Industry | Private Practice |
| Class of Worker | OA |
| Hours Worked | 40 |
| Income (1939) | 12 |
| Highest Grade | C 4 |
| 1935 Residence | Same Place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Dentist |
| Township / Ward | Rockford City |
| Est. Birth Year | ~1889 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Martin | Age | Birth yr |
|---|---|---|---|---|
| Patrick Johnson | Daughter | — | 11 | ~1929 |
| Martin Johnson | Head | — | 51 | ~1889 |
| Gladys Johnson | Spouse | — | 49 | ~1891 |
Census Appearances
1920
Winnebago, Illinois
Son, age 30
Winnebago, Illinois · implied b. ~1890 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Martin L. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 30 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | Dentist |
| Industry | Office |
| Class of Worker | OA |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Winnebago, Illinois
Head, age 41
Winnebago, Illinois · implied b. ~1889 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Martin E. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 41 |
| Marital Status | Married |
| Birthplace | Illinois |
| Age at First Marriage | 30 |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | Physician |
| Industry | Dentistry |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | $48 |
| Radio Set | R |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Winnebago-County, Illinois
Head, age 51
Winnebago-County, Illinois · implied b. ~1889 — 3 household members
| Surname | Johnson |
| Given Name | Martin |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 51 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Rockford City |
| 1935 Residence (County) | Winnebago |
| Occupation | Dentist |
| Industry | Private Practice |
| Class of Worker | OA |
| Hours Worked | 40 |
| Income (1939) | 12 |
| Highest Grade | C 4 |
| 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 Martin Johnson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Victor Johnson (~0.92 confidence) and mother Ida Johnson (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Victor Johnson
b. ~1859
Source father
● Household
· direct · ~0.92
Mother
Ida Johnson
b. ~1864
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Martin Johnson
Head · 1940 · age 51 · b. ~1889 · 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 — Winnebago-County, Illinois
Open full size
1940 US Federal Census — Winnebago-County, Illinois
Page Contents
37 people indexed on this census page (nara:1940:m-t0627-00915-00058)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Earl Miller | 11 | Son | — | Illinois |
| 42 | Bernard E Bolstoff | 36 | Head | Doctor | Russia |
| 43 | Mary Bolstoff | 32 | Wife | — | Wisconsin |
| 44 | Hannah Nelson | 67 | Head | — | Sweden |
| 45 | Evelyn Swanson | 34 | Daughter | Nurse | Illinois |
| 46 | Vivian Swanson | 32 | Daughter | Teacher | Illinois |
| 47 | Ingrid Seedoff | 35 | Daughter | File Clerk | Illinois |
| 48 | Kathryn Seedoff | 15 | Granddaughter | — | Illinois |
| 49 | David Seedoff | 10 | Grandson | — | Illinois |
| 50 | John Seedoff | 5 | Grandson | — | Illinois |
| 51 | Hilding Anderson | 53 | Head | Secretary Treasurer | Sweden |
| 52 | Florence Anderson | 50 | Wife | — | Illinois |
| 53 | Elizabeth Anderson | 17 | Daughter | — | Illinois |
| 54 | Frank Larson | 50 | Head | Stenographer | Sweden |
| 55 | Edith Larson | 46 | Wife | — | Sweden |
| 56 | Margaret Larson | 22 | Daughter | Owner And Manager | Illinois |
| 57 | Virginia Larson | 17 | Daughter | — | Illinois |
| 58 | Leroy Lantz | 40 | Head | Personnel Manager | Illinois |
| 59 | Mildred Lantz | 35 | Wife | — | Illinois |
| 60 | Frank Lantz | 11 | Son | — | Illinois |
| 61 | Dr Ward P Burdick | 57 | Head | — | Wisconsin |
| 62 | Mae M Burdick | 55 | Wife | — | Iowa |
| 63 | Martin Johnson THIS PERSON | 51 | Head | Dentist | Illinois |
| 64 | Gladys Johnson | 49 | Wife | — | Illinois |
| 65 | Patrick Johnson | 11 | Daughter | — | Illinois |
| 66 | Daniel Simpson | 40 | Head | Cashier | Illinois |
| 67 | Carlyn Simpson | 36 | Wife | — | Illinois |
| 68 | Linell Simpson | 7 | Son | — | Illinois |
| 69 | Carol Simpson | 3 | Daughter | — | Illinois |
| 70 | Amandus Palmer | 44 | Head | Official | Illinois |
| 71 | Marie Palmer | 44 | Wife | — | Illinois |
| 72 | Ralph S Zahm | 39 | Head | Attorney | Illinois |
| 73 | Marion Zahm | 27 | Wife | — | Illinois |
| 74 | Karl Zahm | 3 | Son | — | Illinois |
| 75 | Harry A Webb | 55 | Head | Owner And Manager | New York |
| 76 | Pearl Webb | 54 | Wife | — | Illinois |
| 77 | Helen Webb | 19 | 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 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)