EN
Elmer Nelson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Elmer Nelson across the 1910, 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed), with identified parents John & John — first a head (b.~1897), then head of a 5-person household.
Age 43
b. ~1897
Male
Head
Born: Illinois
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Nelson |
| Given Name | Elmer |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 43 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Village of Thornton |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Occupation | Truck Driver |
| Industry | Wholesale Bakery |
| Class of Worker | PW |
| Hours Worked | 60 |
| Income (1939) | 920 |
| Highest Grade | H-2 |
| 1935 Residence | Same Place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Truck Driver |
| Township / Ward | Village Of Thornton |
| Est. Birth Year | ~1897 |
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 Elmer | Age | Birth yr |
|---|---|---|---|---|
| Lillian Nelson | Spouse | — | 43 | ~1897 |
| Wayne Nelson | Son | — | 10 | ~1930 |
| Burton Nelson | Son | — | 14 | ~1926 |
| Elmer Nelson | Head | — | 43 | ~1897 |
| Fred Lange | Other | — | 75 | ~1865 |
Census Appearances
1910
Cook, Illinois
Son, age 12
Cook, Illinois · implied b. ~1898 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Nelson |
| Given Name | Elmer |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | English |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1920
Cook, Illinois
Son, age 22
Cook, Illinois · implied b. ~1898 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Nelson |
| Given Name | Elmer |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | Polisher |
| Industry | Case 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
Cook, Illinois
Head, age 32
Cook, Illinois · implied b. ~1898 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Nelson |
| Given Name | Elmer |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 32 |
| Marital Status | Married |
| Birthplace | Illinois |
| Age at First Marriage | 20 |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | Butcher |
| Industry | Meat Market |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Home Value / Rent | 3500 |
| Radio Set | R |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Head, age 43
Cook-County, Illinois · implied b. ~1897 — 5 household members
| Surname | Nelson |
| Given Name | Elmer |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 43 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Village of Thornton |
| 1935 Residence (County) | Cook |
| Occupation | Truck Driver |
| Industry | Wholesale Bakery |
| Class of Worker | PW |
| Hours Worked | 60 |
| Income (1939) | 920 |
| Highest Grade | H-2 |
| 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 Elmer Nelson across 4 US Census years (1910, 1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father John Nelson (~0.92 confidence) and father John Nelson (~0.92 confidence) and mother Matilda Nelson (~0.92 confidence) and mother Matilda Nelson (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
John Nelson
b. ~1857
Source father
● Household
· direct · ~0.92
Father
John Nelson
b. ~1858
Source father
● Household
· direct · ~0.92
Mother
Matilda Nelson
b. ~1871
Source mother
● Household
· direct · ~0.92
Mother
Matilda Nelson
b. ~1872
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Elmer Nelson
Head · 1940 · age 43 · b. ~1897 · 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 — Cook-County, Illinois
Open full size
1940 US Federal Census — Cook-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00789-00636)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Joan Bruggemann | 16 | Daughter | — | Illinois |
| 42 | Dennis Bruggemann | 9 | Son | — | Illinois |
| 43 | Nola Lee Bruggemann | 5 | Daughter | — | Illinois |
| 44 | Elmer Nelson THIS PERSON | 43 | Head | Truck Driver | Illinois |
| 45 | Lillian Nelson | 43 | Wife | — | Illinois |
| 46 | Burton Nelson | 14 | Son | — | Illinois |
| 47 | Wayne Nelson | 10 | Son | — | Illinois |
| 48 | Fred P. Lange | 75 | Lodger | — | Illinois |
| 49 | Louis Mendelsohn | 52 | Head | Electric Crane Operator | Illinois |
| 50 | Lydia Mendelsohn | 46 | Wife | — | Illinois |
| 51 | Hazel Mendelsohn | 21 | Daughter | Draftsman | Illinois |
| 52 | Earl Mendelsohn | 16 | Son | — | Illinois |
| 53 | Betty Jane Mendelsohn | 13 | Daughter | — | Illinois |
| 54 | Martin Bruggemann | 64 | Head | Building Contractor | Illinois |
| 55 | Jane Bruggemann | 58 | Wife | — | Illinois |
| 56 | Edwin Bruggemann | 33 | Son | Carpenter Helper | Illinois |
| 57 | George Wolff | 27 | Son-in-law | Handyman | Illinois |
| 58 | Esther Wolff | 26 | Daughter | — | Illinois |
| 59 | Lawrence Wolff | 4 | Son | — | Illinois |
| 60 | Gerald Wolff | 4 | Grandson | — | Illinois |
| 61 | Henry R. Hecht | 33 | Head | Machine Operator | Illinois |
| 62 | Emma Hecht | 33 | Wife | — | Illinois |
| 63 | Patricia Hecht | 3 | Daughter | — | Indiana |
| 64 | Harold Lang | 25 | Head | Bookkeeper | Illinois |
| 65 | Madeline Lang | 25 | Wife | — | Illinois |
| 66 | John Lang | 55 | Head | Crater | Illinois |
| 67 | Martha Lang | 55 | Wife | — | Germany |
| 68 | Erwin Lang | 21 | Son | Bundler | Illinois |
| 69 | Enumeration April 4Th | None | — | — | — |
| 70 | Otto H. Wietz | 58 | Head | Assembler | Indiana |
| 71 | Hulda Wietz | 57 | Wife | — | Illinois |
| 72 | Herbert Bruggemann | 41 | Head | Stationary Engineer | Illinois |
| 73 | Viola B. Bruggemann | 41 | Wife | — | Illinois |
| 74 | Laverne H. Bruggemann | 21 | Daughter | Mechanic | Illinois |
| 75 | Eugene C. Bruggemann | 19 | Son | Inspector | Illinois |
| 76 | Martin S. Hormann | 29 | Head | Laborer | Illinois |
| 77 | Ermine Hormann | 27 | Wife | — | Illinois |
| 78 | Lilly L. Hormann | 9 | Daughter | — | Illinois |
| 79 | Mary Ann Hormann | 7 | Daughter | — | Illinois |
| 80 | Howard Hormann | 2 | Son | — | Illinois |
Pedigree Summary
Elmer
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)