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Harold Nelson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Harold Nelson across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed), with identified parents John & Gustav — first a son (b.~1908), then head of a 5-person household.
Age 32
b. ~1908
Male
Son
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Nelson |
| Given Name | Harold H. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 32 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Occupation | PHOTOGRAPHER |
| Industry | PHOTO SUPPLIES |
| Class of Worker | PW |
| Hours Worked | 49 |
| Income (1939) | 1500 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Photographer |
| Township / Ward | Chicago City |
| Est. Birth Year | ~1908 |
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 Harold | Age | Birth yr |
|---|---|---|---|---|
| John Nelson | Head | — | 71 | ~1869 |
| Edna Nelson | Other | — | 28 | ~1912 |
| Harold Nelson | Son | — | 32 | ~1908 |
| John Nelson | Son | — | 28 | ~1912 |
| Isabelle Nelson | Spouse | — | 70 | ~1870 |
Census Appearances
1920
Cook, Illinois
Son, age 11
Cook, Illinois · implied b. ~1909 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Nelson |
| Given Name | Harold |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Cook, Illinois
Son, age 21
Cook, Illinois · implied b. ~1909 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Nelson |
| Given Name | Harold |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Illinois |
| Age at First Marriage | 21 |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | Stone cutter |
| Industry | Stone Cutting |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | No |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Son, age 32
Cook-County, Illinois · implied b. ~1908 — 5 household members
| Surname | Nelson |
| Given Name | Harold H. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 32 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Occupation | PHOTOGRAPHER |
| Industry | PHOTO SUPPLIES |
| Class of Worker | PW |
| Hours Worked | 49 |
| Income (1939) | 1500 |
| Highest Grade | H 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 Harold Nelson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father John Nelson (~0.92 confidence) and father Gustav Nelson (~0.92 confidence) and mother Isabelle Nelson (~0.92 confidence) and mother Hulda Nelson (~0.92 confidence) and father John Nelson (~0.92 confidence) and mother Ellen Nelson (~0.92 confidence). The pedigree spans 1 generation with 6 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
John Nelson
b. ~1869
Source father
● Household
· direct · ~0.92
Father
Gustav Nelson
b. ~1870
Source father
● Household
· direct · ~0.92
Mother
Isabelle Nelson
b. ~1870
Source mother
● Household
· direct · ~0.92
Mother
Hulda Nelson
b. ~1876
Source mother
● Household
· direct · ~0.92
Father
John Nelson
b. ~1876
Source father
● Household
· direct · ~0.92
Mother
Ellen Nelson
b. ~1877
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Harold Nelson
Son · 1940 · age 32 · b. ~1908 · Illinois
★ You are viewing this record
Sibling
John Nelson
Sibling · 1940 · age 28
Source co-child of head (derived)
● Co-child · derived · ~0.88
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-t0627-01001-00450)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Saul Silberberg | 48 | Head | Dealer In Metal | Poland |
| 42 | Rose Silberberg | 46 | Wife | — | Poland |
| 43 | Richard Silberberg | 5 | Son | — | Illinois |
| 44 | Pearl K. Miskaya | 76 | Mother in law | Housewife | Poland |
| 45 | Max Miskaya | 19 | Nephew | Helper | Illinois |
| 46 | John F. W. Nelson | 71 | Head | Carpenter | Denmark |
| 47 | Isabelle Nelson | 70 | Wife | — | Illinois |
| 48 | Harold H. Nelson THIS PERSON | 32 | Son | Photographer | Illinois |
| 49 | John F. Nelson | 28 | Son | Butcher | Illinois |
| 50 | Edna J. Nelson | 28 | Daughter in law | — | Illinois |
| 51 | Irving M. Nelson | 44 | Head | Commercial Artist | Illinois |
| 52 | Anna M. Nelson | 41 | Wife | — | Wisconsin |
| 53 | Joseph Kusta | 45 | Brother in law | Waiter | Wisconsin |
| 54 | Julius Fontana | 38 | Head | Bartender | Italy |
| 55 | Hugo Giolli | 42 | Partner | Moulder | Italy |
| 56 | Rose Giolli | 42 | Wife of Partner | — | Italy |
| 57 | Lino Giolli | 7 | Son of Partner | — | Illinois |
| 58 | Jennie Fontana | 60 | Mother | Housewife | Italy |
| 59 | John C. Hurley | 61 | Head | Accountant | Delaware |
| 60 | Julia F. Hurley | 54 | Wife | — | Canada English |
| 61 | Marion Hurley | 25 | Daughter | General Office Work | Illinois |
| 62 | Melvin B. Wharton | 60 | Head | Salesman | Louisiana |
| 63 | Ida M. Wharton | 59 | Wife | — | Illinois |
| 64 | Benjamin J. Edelman | 40 | Head | Picture Salesman | Austria |
| 65 | Bessie B. Edelman | 38 | Wife | — | Austria |
| 66 | June R. Edelman | 11 | Daughter | — | Illinois |
| 67 | Phyllis Edelman | 7 | Daughter | — | Illinois |
| 68 | Julius Corn | 68 | Head | Estimator | Austria |
| 69 | Johanna Corn | 61 | Wife | — | Austria |
| 70 | Robert S. Corn | 32 | Son | Office Clerk | Illinois |
| 71 | Oscar Corn | 30 | Son | Reporter | Illinois |
| 72 | Rose Corn | 26 | Daughter | Bookkeeper | Illinois |
| 73 | Axel Swanson | 58 | Head | Carpenter | Sweden |
| 74 | Selma Swanson | 53 | Wife | — | Sweden |
| 75 | Edith M. Swanson | 20 | Daughter | Comptometer Operator | Illinois |
| 76 | John W. Slate | 64 | Head | Minister | Pennsylvania |
| 77 | Lottie V. Slate | 57 | Wife | — | Canada English |
| 78 | Dorothy A. Slate | 26 | Daughter | Gym Teacher | Illinois |
| 79 | Charles Hochleutner | 57 | Head | Printing Carryoff | Germany |
| 80 | Anna Hochleutner | 52 | Wife | — | Illinois |
Pedigree Summary
Harold + 1 sibling
Gen 1 · 6 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)