DJ
David Johnson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Rock-Island-County, Illinois
Our Model Tree links this David Johnson across the 1910, 1920, 1930 and 1940 US Censuses in Rock-Island-County, Illinois (XGBoost, ~Confirmed), with identified parents Hannah & Peter — first a head (b.~1900), then head of a 3-person household.
Age 40
b. ~1900
Male
Head
Born: Illinois
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Rock-Island-County, Illinois |
| Surname | Johnson |
| Given Name | David |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 40 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Moline |
| 1935 Residence (County) | Rock Island |
| Additional Details | |
| Occupation | Trucker |
| Industry | mfg farm equipment |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1560 |
| Highest Grade | No 8 |
| 1935 Residence | Illinois |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Trucker |
| Township / Ward | Rock Island City |
| Est. Birth Year | ~1900 |
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 David | Age | Birth yr |
|---|---|---|---|---|
| Beverly Johnson | Daughter | — | 4 | ~1936 |
| David Johnson | Head | — | 40 | ~1900 |
| Lois Johnson | Spouse | — | 33 | ~1907 |
Census Appearances
1910
Rock Island, …
Son, age 10
Rock Island, Illinois · implied b. ~1900 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | David S |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1920
Rock Island, …
Son, age 19
Rock Island, Illinois · implied b. ~1901 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | David S. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | Machine oper. |
| Industry | Iron works |
| 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, …
Son, age 30
Rock Island, Illinois · implied b. ~1900 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | David S |
| 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 | Checking clerk |
| Industry | Tractor plant |
| 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 40
Rock-Island-County, Illinois · implied b. ~1900 — 3 household members
| Surname | Johnson |
| Given Name | David |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 40 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Moline |
| 1935 Residence (County) | Rock Island |
| Occupation | Trucker |
| Industry | mfg farm equipment |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1560 |
| Highest Grade | No 8 |
| 1935 Residence | Illinois |
| 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 David Johnson across 4 US Census years (1910, 1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Hannah Johnson (~0.92 confidence) and father Peter Johnson (~0.92 confidence) and father Peter Johnson (~0.92 confidence) and mother Hannah Johnson (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Hannah Johnson
b. ~1861
Source mother
● Household
· direct · ~0.92
Father
Peter Johnson
b. ~1864
Source father
● Household
· direct · ~0.92
Father
Peter Johnson
b. ~1866
Source father
● Household
· direct · ~0.92
Mother
Hannah Johnson
b. ~1866
Source mother
● Household
· direct · ~0.92
This person
Anchor record
David Johnson
Head · 1940 · age 40 · b. ~1900 · 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-t0627-00877-00352)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Ronald R. Stevens | 2 | Son | — | Illinois |
| 42 | Joyce E. Stevens | 0 | Daughter | — | Illinois |
| 43 | Gus W. Kulhavy | 41 | Head | Paint Sprayer | Iowa |
| 44 | Betty M. Kulhavy | 18 | Wife | — | Iowa |
| 45 | David Johnson THIS PERSON | 40 | Head | Trucker | Illinois |
| 46 | Lois Johnson | 33 | Wife | — | Iowa |
| 47 | Beverly Johnson | 4 | Daughter | — | Illinois |
| 48 | John Jakas | 31 | Head | Roll Hand | Michigan |
| 49 | Marion Jakas | 25 | Wife | — | Illinois |
| 50 | William Jakas | 3 | Son | — | Illinois |
| 51 | Arvid W. Johnson | 34 | Head | Inspector & Checker | Illinois |
| 52 | Millie Johnson | 37 | Wife | — | Illinois |
| 53 | Yvonne Johnson | 11 | Daughter | — | Illinois |
| 54 | Gretchen Johnson | 8 | Daughter | — | Illinois |
| 55 | Elza J. Turner | 37 | Head | Moulder | Kentucky |
| 56 | Cleda Turner | 30 | Wife | Core Cleaner | Illinois |
| 57 | Thomas F. Turner | 43 | Head | Moulder | Kentucky |
| 58 | Florence Turner | 43 | Wife | — | Kentucky |
| 59 | Leo B. Turner | 15 | Son | — | Illinois |
| 60 | Gerald L. Turner | 7 | Son | — | Illinois |
| 61 | Arthur Johnson | 40 | Head | Shipping Clerk | Illinois |
| 62 | Alma Johnson | 37 | Wife | — | Missouri |
| 63 | Jacqueline Johnson | 15 | Daughter | — | Illinois |
| 64 | Shirley Johnson | 14 | Daughter | — | Illinois |
| 65 | Arthur J. Johnson | 8 | Son | — | Illinois |
| 66 | August P. Johnson | 71 | Head | — | Sweden |
| 67 | Emma Johnson | 68 | Wife | — | Sweden |
| 68 | Edwin H. Johnson | 43 | Son | Machinist | Illinois |
| 69 | Harry S. Boot | 50 | Head | Machinist | Iowa |
| 70 | Rose S. Boot | 42 | Wife | — | Iowa |
| 71 | Lucille D. Boot | 23 | Daughter | Shoe Maker | Minnesota |
| 72 | Robert L. Boot | 20 | Son | Printer | Iowa |
| 73 | Fred Metzger | 79 | Father-in-law | — | Switzerland |
| 74 | Albert Morisette | 35 | Head | Machinist | Kansas |
| 75 | Ada Morisette | 35 | Wife | — | Illinois |
| 76 | Marjorie Morisette | 12 | Daughter | — | Minnesota |
| 77 | Marvel Morisette | 10 | Daughter | — | Minnesota |
| 78 | Joan Morisette | 5 | Daughter | — | Minnesota |
| 79 | Leone Bender | 73 | Mother-in-law | — | Belgium |
| 80 | Burt Danes | 50 | Head | Fireman (Locomotive) | Illinois |
Pedigree Summary
David
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 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)