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Harold Nelson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Latah-County, Idaho
Our Model Tree links this Harold Nelson across the 1920, 1930 and 1940 US Censuses in Latah-County, Idaho (XGBoost, ~Confirmed), with identified parents A & Lydia — first a son (b.~1919), then head of a 6-person household.
Age 21
b. ~1919
Male
Son
Born: Idaho
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Latah-County, Idaho |
| Surname | Nelson |
| Given Name | Harold |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Idaho |
| 1935 Residence (City) | Moscow City |
| 1935 Residence (County) | Latah |
| Additional Details | |
| Occupation | Laborer |
| Industry | Lumber Co |
| Class of Worker | PW |
| Income (1939) | 300 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Idaho |
| Birth Country | United States |
| Birthplace (normalized) | idaho |
| Occupation | Laborer |
| Township / Ward | Moscow City |
| Est. Birth Year | ~1919 |
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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Harold | Age | Birth yr |
|---|---|---|---|---|
| Kathryn Nelson | Daughter | — | 17 | ~1923 |
| Irene Nelson | Daughter | — | 29 | ~1911 |
| Lucille Nelson | Daughter | — | 26 | ~1914 |
| Lydia Nelson | Head | — | 58 | ~1882 |
| Harold Nelson | Son | — | 21 | ~1919 |
| Everett Nelson | Son | — | 24 | ~1916 |
Census Appearances
1920
Latah, Idaho
Son, age 1
Latah, Idaho · implied b. ~1919 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Nelson |
| Given Name | Harold |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Idaho |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Wisconsin |
| Birth State | Idaho |
| Birth Country | United States |
| Birthplace (normalized) | idaho |
1930
Latah, Idaho
Son, age 11
Latah, Idaho · implied b. ~1919 — 7 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 | Idaho |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Wisconsin |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Idaho |
| Birth Country | United States |
| Birthplace (normalized) | idaho |
1940
Latah-County, Idaho
Son, age 21
Latah-County, Idaho · implied b. ~1919 — 6 household members
| Surname | Nelson |
| Given Name | Harold |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Idaho |
| 1935 Residence (City) | Moscow City |
| 1935 Residence (County) | Latah |
| Occupation | Laborer |
| Industry | Lumber Co |
| Class of Worker | PW |
| Income (1939) | 300 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Idaho |
| Birth Country | United States |
| Birthplace (normalized) | idaho |
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 A Nelson (~0.92 confidence) and mother Lydia Nelson (~0.92 confidence) and mother Lydia Nelson (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
A Nelson
b. ~1856
Source father
● Household
· direct · ~0.92
Mother
Lydia Nelson
b. ~1861
Source mother
● Household
· direct · ~0.92
Mother
Lydia Nelson
b. ~1882
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Harold Nelson
Son · 1940 · age 21 · b. ~1919 · Idaho
★ You are viewing this record
Sibling
Irene Nelson
Sibling · 1940 · age 29
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lucille Nelson
Sibling · 1940 · age 26
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Everett Nelson
Sibling · 1940 · age 24
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Kathryn Nelson
Sibling · 1940 · age 17
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 — Latah-County, Idaho
Open full size
1940 US Federal Census — Latah-County, Idaho
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00749-00222)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Frank Slater | 68 | Head | Retired | Germany |
| 2 | Louise Slater | 52 | Wife | — | Minnesota |
| 3 | Charlie R. Alwin | 44 | Head | Laborer | Washington |
| 4 | Charlie G. Alwin | 12 | Son | — | Idaho |
| 5 | Leon Sodorff | 25 | Head | Laborer | Idaho |
| 6 | Zelva Sodorff | 24 | Wife | — | Washington |
| 7 | Charlotte Sodorff | 3 | Daughter | — | Idaho |
| 8 | Barbara Sodorff | 1 | Daughter | — | Idaho |
| 9 | Charles Haberman | 68 | Head | Retired | Iowa |
| 10 | Mary Haberman | 68 | Wife | — | New York |
| 11 | Henry Brennan | 43 | Head | Janitor | Iowa |
| 12 | Clara Brennan | 40 | Wife | — | Idaho |
| 13 | Gordon Brennan | 19 | Son | Janitor | Idaho |
| 14 | Muriel Brennan | 17 | Daughter | — | Idaho |
| 15 | Jo Ann Brennan | 10 | Daughter | — | Idaho |
| 16 | Frank Norton | 81 | Head | Retired | Ohio |
| 17 | Freda Norton | 45 | Wife | — | Minnesota |
| 18 | Joseph Norton | 31 | Son | Teacher | Montana |
| 19 | Francis Norton | 27 | Son | Teacher | Montana |
| 20 | Lydia C. B. Nelson | 58 | Head | — | Wisconsin |
| 21 | Irene Nelson | 29 | Daughter | Clerk | Idaho |
| 22 | Lucille Nelson | 26 | Daughter | Clerk | Idaho |
| 23 | Everett Nelson | 24 | Son | Laborer | Idaho |
| 24 | Harold Nelson THIS PERSON | 21 | Son | Laborer | Idaho |
| 25 | Kathryn Nelson | 17 | Daughter | — | Idaho |
| 26 | Hilding A. Bjorklund | 53 | Head | Merchant | Massachusetts |
| 27 | Minnie Bjorklund | 52 | Wife | — | Minnesota |
| 28 | Alice Bjorklund | 25 | Daughter | Teacher | Idaho |
| 29 | Richard Bjorklund | 20 | Son | Clerk | Idaho |
| 30 | Robert Bjorklund | 8 | Son | — | Idaho |
| 31 | John A. Anderson | 79 | Head | Retired | Sweden |
| 32 | Ella S. Anderson | 77 | Wife | — | Sweden |
| 33 | Nels Bjorklund | 80 | Head | Retired | Sweden |
| 34 | Albertina Bjorklund | 74 | Wife | — | Sweden |
| 35 | Petra Foss | 62 | Head | — | Minnesota |
| 36 | Christina Kriesien | 48 | Head | — | Idaho |
| 37 | Walter Kriesien | 21 | Son | Laborer | Idaho |
| 38 | Laverne Kriesien | 19 | Daughter | — | Idaho |
| 39 | Edgar Kriesien | 17 | Son | Usher | Idaho |
| 40 | Otto Mortensen | 50 | Lodger | Maintenance | Denmark |
Pedigree Summary
Harold + 4 siblings
Gen 1 · 3 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)