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William Nicholson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Knox-County, Indiana
Our Model Tree links this William Nicholson across the 1920, 1930 and 1940 US Censuses in Knox-County, Indiana (XGBoost, ~Confirmed), with identified parents Mary — first a head (b.~1903), then head of a 5-person household.
Age 37
b. ~1903
Male
Head
Born: Indiana
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Knox-County, Indiana |
| Surname | Nicholson |
| Given Name | William |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 37 |
| Marital Status | Married |
| Birthplace | Indiana |
| 1935 Residence (City) | Steen Township |
| 1935 Residence (County) | Knox |
| Additional Details | |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | PW |
| Hours Worked | 72 |
| Income (1939) | 0 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
| Occupation | Farmer |
| Township / Ward | Steen Township |
| Est. Birth Year | ~1903 |
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 William | Age | Birth yr |
|---|---|---|---|---|
| William Nicholson | Head | — | 37 | ~1903 |
| Mary Nicholson | Other | — | 69 | ~1871 |
| Billie Nicholson | Son | — | 9 | ~1931 |
| Mary Nicholson | Daughter | — | 6 | ~1934 |
| Lois Nicholson | Spouse | — | 34 | ~1906 |
Census Appearances
1920
Knox, Indiana
Son, age 17
Knox, Indiana · implied b. ~1903 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Nicholson |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Indiana |
| Father's Birthplace | Indiana |
| Mother's Birthplace | Indiana |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
1930
Knox, Indiana
Head, age 27
Knox, Indiana · implied b. ~1903 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Nicholson |
| Given Name | William C. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Married |
| Birthplace | Indiana |
| Age at First Marriage | 24 |
| Father's Birthplace | Indiana |
| Mother's Birthplace | Indiana |
| Occupation | Farm Laborer |
| Industry | Farm |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
1940
Knox-County, Indiana
Head, age 37
Knox-County, Indiana · implied b. ~1903 — 5 household members
| Surname | Nicholson |
| Given Name | William |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 37 |
| Marital Status | Married |
| Birthplace | Indiana |
| 1935 Residence (City) | Steen Township |
| 1935 Residence (County) | Knox |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | PW |
| Hours Worked | 72 |
| Income (1939) | 0 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
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 Nicholson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Mary Nicholson (~0.92 confidence). The pedigree spans 1 generation with 1 identified ancestor.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Mary Nicholson
b. ~1871
Source mother
● Household
· direct · ~0.92
This person
Anchor record
William Nicholson
Head · 1940 · age 37 · b. ~1903 · Indiana
★ 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 — Knox-County, Indiana
Open full size
1940 US Federal Census — Knox-County, Indiana
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01060-00268)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Alice Baker | 21 | Daughter | Clerk | Indiana |
| 2 | Wilma Baker | 20 | Daughter | — | Indiana |
| 3 | Lois Baker | 17 | Daughter | — | Indiana |
| 4 | Betty Baker | 13 | Daughter | — | Indiana |
| 5 | Sarah Baker | 8 | Daughter | — | Indiana |
| 6 | Leah Padgett | 3 | Granddaughter | — | Indiana |
| 7 | Walter D. Noble | 39 | Head | Farmer | Indiana |
| 8 | Christine Noble | 41 | Wife | — | Indiana |
| 9 | Mary Alice Noble | 14 | Daughter | — | Indiana |
| 10 | Charles N. Noble | 11 | Son | — | Indiana |
| 11 | William Nicholson THIS PERSON | 37 | Head | Farmer | Indiana |
| 12 | Lois Nicholson | 34 | Wife | — | Indiana |
| 13 | Billie Nicholson | 9 | Son | — | Indiana |
| 14 | Mary E. Nicholson | 6 | Daughter | — | Indiana |
| 15 | Mary E. Nicholson | 69 | Mother-in-law | — | Indiana |
| 16 | Louis Hendrickson | 49 | Head | Laborer | Indiana |
| 17 | Carrie Hendrickson | 44 | Wife | — | Indiana |
| 18 | Arthur Hendrickson | 25 | Son | Miner | North Dakota |
| 19 | Richard Hendrickson | 24 | Son | Miner | Indiana |
| 20 | Catherine Hendrickson | 20 | Daughter | — | Indiana |
| 21 | Jane Hendrickson | 14 | Daughter | — | Indiana |
| 22 | Willie Hendrickson | 31 | Brother-in-law | Truck Driver | Indiana |
| 23 | Carl Roark | 31 | Head | Farmer | Indiana |
| 24 | Jessie Roark | 29 | Wife | — | Indiana |
| 25 | Billie Roark | 4 | Son | — | Indiana |
| 26 | Minnie Mclin | 54 | Head | — | Missouri |
| 27 | Arthur Mclin | 32 | Son | Farmer | Indiana |
| 28 | Leona Mclin | 21 | Daughter | — | Indiana |
| 29 | Mary Francis Mclin | 15 | Daughter | — | Indiana |
| 30 | John Mclin | 30 | Son | Farmer | Indiana |
| 31 | Ruth Mclin | 22 | Daughter-in-law | — | Indiana |
| 32 | Harry Dugan | 56 | Head | Distributor | Pennsylvania |
| 33 | Pearl Dugan | 51 | Wife | — | Indiana |
| 34 | George Like | 73 | Head | Farmer | Indiana |
| 35 | Della Like | 66 | Wife | — | Indiana |
| 36 | Harold Like | 22 | Son | Farmer | Illinois |
| 37 | John Watkins | 61 | Head | Farmer | Indiana |
| 38 | Bessie Watkins | 53 | Wife | — | Indiana |
| 39 | Herman Lou Watkins | 23 | Son | Farmer | Indiana |
| 40 | Aline Watkins | 20 | Wife | — | Indiana |
Pedigree Summary
William
Gen 1 · 1 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)