WN
William Nelson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Boone-County, Iowa
Our Model Tree links this William Nelson across the 1920, 1930 and 1940 US Censuses in Boone-County, Iowa (XGBoost, ~Confirmed), with identified parents Charles & Nels — first a son (b.~1907), then head of a 3-person household.
Age 33
b. ~1907
Male
Son
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Boone-County, Iowa |
| Surname | Nelson |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 33 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Marcy Twp. |
| 1935 Residence (County) | Boone |
| Additional Details | |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | OA |
| Hours Worked | 60 |
| Income (1939) | 0 |
| Highest Grade | 8 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Farmer |
| Township / Ward | Marcy Twp |
| Est. Birth Year | ~1907 |
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 William | Age | Birth yr |
|---|---|---|---|---|
| Fern Nelson | Daughter | — | 27 | ~1913 |
| Nels Nelson | Head | — | 56 | ~1884 |
| William Nelson | Son | — | 33 | ~1907 |
Census Appearances
Son, age 12
Boone, Iowa · implied b. ~1908 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Nelson |
| Given Name | Willie |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Iowa |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Boone, Iowa
Son, age 23
Boone, Iowa · implied b. ~1907 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Nelson |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Iowa |
| Occupation | Farm Laborer |
| Industry | Gen Farm |
| Class of Worker | VVVV |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Boone-County, Iowa
Son, age 33
Boone-County, Iowa · implied b. ~1907 — 3 household members
| Surname | Nelson |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 33 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Marcy Twp. |
| 1935 Residence (County) | Boone |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | OA |
| Hours Worked | 60 |
| Income (1939) | 0 |
| Highest Grade | 8 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
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 William Nelson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Charles Nelson (~0.92 confidence) and father Nels Nelson (~0.92 confidence) and mother Cecilia Nelson (~0.92 confidence) and mother Callie Nelson (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Charles Nelson
b. ~1873
Source father
● Household
· direct · ~0.92
Father
Nels Nelson
b. ~1884
Source father
● Household
· direct · ~0.92
Mother
Cecilia Nelson
b. ~1883
Source mother
● Household
· direct · ~0.92
Mother
Callie Nelson
b. ~1882
Source mother
● Household
· direct · ~0.92
This person
Anchor record
William Nelson
Son · 1940 · age 33 · b. ~1907 · Iowa
★ You are viewing this record
Sibling
Fern Nelson
Sibling · 1940 · age 27
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 — Boone-County, Iowa
Open full size
1940 US Federal Census — Boone-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01141-00752)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Helen Lovelace | 48 | Wife | — | Iowa |
| 42 | Raymond Lovelace | 16 | Son | — | Iowa |
| 43 | Allan Lovelace | 14 | Son | — | Iowa |
| 44 | Gloria G. Lafferty | 53 | Head | Farmer | Iowa |
| 45 | Myrtle Lafferty | 51 | Wife | — | Iowa |
| 46 | Mollie Lafferty | 21 | Daughter | — | Iowa |
| 47 | Ray M. Swanson | 53 | Head | Farmer | Iowa |
| 48 | Ida Swanson | 53 | Wife | — | Iowa |
| 49 | Raymond Swanson | 27 | Son | Laborer | Iowa |
| 50 | Raymond Campbell | 32 | Head | Farmer | Iowa |
| 51 | Lallaine Campbell | 29 | Wife | — | Iowa |
| 52 | Edwin B. Erain | 50 | Head | Farmer | Illinois |
| 53 | Florence Erain | 42 | Wife | — | Missouri |
| 54 | Hazel Erain | 14 | Daughter | — | Missouri |
| 55 | Dolly Erain | 13 | Daughter | — | Missouri |
| 56 | C. J. Tavellion | 64 | Head | Farmer | Iowa |
| 57 | Maynard Chance | 30 | Son-in-law | Farm Dept. | Iowa |
| 58 | Zella Chance | 32 | Daughter | — | Iowa |
| 59 | John Chance | 5 | Grandson | — | Iowa |
| 60 | Nels O. Nelson | 56 | Head | — | Iowa |
| 61 | William Nelson THIS PERSON | 33 | Son | Farmer | Iowa |
| 62 | Fern Nelson | 27 | Daughter | — | Iowa |
| 63 | Henry Rood | 63 | Head | Farmer | Iowa |
| 64 | Vesta Rood | 50 | Sister | — | Iowa |
| 65 | Ray Arney | 39 | Hired man | Laborer | Nebraska |
| 66 | Clifford Lieske | 33 | Head | Carpenter | Iowa |
| 67 | Bernice Lieske | 29 | Wife | — | Iowa |
| 68 | Ronald Lieske | 9 | Son | — | Iowa |
| 69 | Norman Lieske | 6 | Son | — | Iowa |
| 70 | Myron Lieske | 4 | Son | — | Iowa |
| 71 | Ray Crovin | 41 | Head | Farmer | Illinois |
| 72 | Edith Crovin | 40 | Wife | — | Missouri |
| 73 | Daniel Crovin | 7 | Son | — | Iowa |
| 74 | Ida Crovin | 79 | Mother | — | Indiana |
| 75 | Floyd Roby | 30 | Head | Farmer | Iowa |
| 76 | Bernice Roby | 30 | Wife | — | Iowa |
| 77 | August Kettom | 57 | Head | Farmer | Iowa |
| 78 | Vernon Simpson | 26 | Hired man | Laborer | Iowa |
| 79 | B. P. Nystrom | 58 | Head | Farmer | Iowa |
| 80 | Anna Nystrom | 49 | Wife | — | Iowa |
Related Census Records
Pedigree Summary
William + 1 sibling
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)