RN
Robert Nichols — 1940 US Census Record
Model Tree available1940 United States Federal Census · Boone-County, Missouri
Our Model Tree links this Robert Nichols across the 1920, 1930 and 1940 US Censuses in Boone-County, Missouri (XGBoost, ~Confirmed), with identified parents J & James — first a son (b.~1914), then head of a 8-person household.
Age 26
b. ~1914
Male
Son
Born: Missouri
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Boone-County, Missouri |
| Surname | Nichols |
| Given Name | Robert L. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 26 |
| Marital Status | Single |
| Birthplace | Missouri |
| 1935 Residence (City) | Cedar Township |
| 1935 Residence (County) | Boone |
| Additional Details | |
| Occupation | Laborer |
| Industry | Rock Wool plant |
| Class of Worker | PW |
| Hours Worked | 42 |
| Income (1939) | 403 |
| Highest Grade | S 8 |
| 1935 Residence | Missouri |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
| Occupation | Laborer |
| Township / Ward | Cedar Township |
| Est. Birth Year | ~1914 |
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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Robert | Age | Birth yr |
|---|---|---|---|---|
| J Nichols | Head | — | 65 | ~1875 |
| Alice Nichols | Spouse | — | 64 | ~1876 |
| Charles Crump | Other | — | 5 | ~1935 |
| Zella Nichols | Daughter | — | 32 | ~1908 |
| James Nichols | Son | — | 21 | ~1919 |
| Robert Nichols | Son | — | 26 | ~1914 |
| Virginia Crump | Other | — | 8 | ~1932 |
| Floy Crump | Daughter | — | 35 | ~1905 |
Census Appearances
1920
Boone, Missouri
Son, age 7
Boone, Missouri · implied b. ~1913 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Nichols |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 7 |
| Marital Status | Single |
| Birthplace | Missouri |
| Father's Birthplace | Missouri |
| Mother's Birthplace | Missouri |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
1930
Boone, Missouri
Son, age 17
Boone, Missouri · implied b. ~1913 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Nichols |
| Given Name | Robert L. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Missouri |
| Father's Birthplace | Missouri |
| Mother's Birthplace | Missouri |
| Can Read/Write | Yes |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
1940
Boone-County, Missouri
Son, age 26
Boone-County, Missouri · implied b. ~1914 — 8 household members
| Surname | Nichols |
| Given Name | Robert L. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 26 |
| Marital Status | Single |
| Birthplace | Missouri |
| 1935 Residence (City) | Cedar Township |
| 1935 Residence (County) | Boone |
| Occupation | Laborer |
| Industry | Rock Wool plant |
| Class of Worker | PW |
| Hours Worked | 42 |
| Income (1939) | 403 |
| Highest Grade | S 8 |
| 1935 Residence | Missouri |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
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 Robert Nichols across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father J Nichols (~0.92 confidence) and father James Nichols (~0.92 confidence) and mother Alice Nichols (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
J Nichols
b. ~1875
Source father
● Household
· direct · ~0.92
Father
James Nichols
b. ~1875
Source father
● Household
· direct · ~0.92
Mother
Alice Nichols
b. ~1877
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Robert Nichols
Son · 1940 · age 26 · b. ~1914 · Missouri
★ You are viewing this record
Sibling
Zella Nichols
Sibling · 1940 · age 32
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Floy Crump
Sibling · 1940 · age 35
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Nichols
Sibling · 1940 · age 21
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, Missouri
Open full size
1940 US Federal Census — Boone-County, Missouri
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02086-00122)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Ma Vanelle Nichols | 14 | Daughter | Homework | Missouri |
| 42 | Betty Ruth Nichols | 13 | Daughter | No | Missouri |
| 43 | Wilby W. Nichols | 9 | Son | No | Missouri |
| 44 | Lloyd C. Purcell | 47 | Head | Farmer | Missouri |
| 45 | Ellen Purcell | 45 | Wife | House Work | Missouri |
| 46 | Roy Purcell | 25 | Son | Laborer | Missouri |
| 47 | Marion Purcell | 17 | Son | Laborer | Missouri |
| 48 | Ellsworth Purcell | 8 | Son | No | Missouri |
| 49 | Marna Lea Purcell | 6 | Daughter | No | Missouri |
| 50 | Joetta Kay Purcell | 3 | Daughter | — | Missouri |
| 51 | J. D. Nichols | 65 | Head | Farmer | Missouri |
| 52 | Alice Nichols | 64 | Wife | House Work | Missouri |
| 53 | Floy E. Crump | 35 | Daughter | House Work | Missouri |
| 54 | Virginia Mae Crump | 8 | Granddaughter | No | Missouri |
| 55 | Charles Ray Crump | 5 | Grandson | No | Missouri |
| 56 | Robert L. Nichols THIS PERSON | 26 | Son | Laborer | Missouri |
| 57 | James M. Nichols | 21 | Son | Laborer | Missouri |
| 58 | Zella M. Nichols | 32 | Daughter | House Work | Missouri |
| 59 | G. F. Sugar | 46 | Head | Laborer | Missouri |
| 60 | Goldie Sugar | 33 | Wife | House Work | Missouri |
| 61 | Mary Margaret Sugar | 16 | Daughter | House Work | Missouri |
| 62 | Raymond Sugar | 12 | Son | No | Missouri |
| 63 | Kathleen Sugar | 4 | Daughter | — | Missouri |
| 64 | Dale Sugar | 1 | Son | — | Missouri |
| 65 | John E. Calvert | 56 | Head | Laborer | Missouri |
| 66 | Brookie M. Calvert | 39 | Wife | House Work | Missouri |
| 67 | Ben Edward Calvert | 20 | Son | Truck Driver | Missouri |
| 68 | John William Calvert | 19 | Son | Laborer | Missouri |
| 69 | Cloid Calvin | 50 | Head | Laborer | Missouri |
| 70 | Chloe Calvin | 37 | Wife | House Work | Missouri |
| 71 | Maggie Lou Calvin | 10 | Daughter | No | Missouri |
| 72 | Elton Hartley Calvin | 8 | Son | No | Missouri |
| 73 | Jimmy Jo Calvin | 3 | Son | — | Missouri |
| 74 | Oakley Nichols | 48 | Head | Farmer | Missouri |
| 75 | Myrtle Nichols | 46 | Wife | House Work | Missouri |
| 76 | Raymond Nichols | 18 | Son | Laborer | Missouri |
| 77 | Mildred Nichols | 12 | Daughter | No | Missouri |
| 78 | Missouri Nichols | 79 | Mother-in-law | No | Missouri |
| 79 | G. R. Perkins | 53 | Head | Farmer | Missouri |
| 80 | Ellen Perkins | 49 | Wife | House Work | Missouri |
Related Census Records
Pedigree Summary
Robert + 3 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)