RB
Robert Boyd — 1940 US Census Record
Model Tree available1940 United States Federal Census · Jefferson-County, Colorado
Our Model Tree links this Robert Boyd across the 1920, 1930 and 1940 US Censuses in Jefferson-County, Colorado (XGBoost, ~Confirmed), with identified parents R & Ray — first a son (b.~1918), then head of a 4-person household.
Age 22
b. ~1918
Male
Son
Born: Colorado
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Jefferson-County, Colorado |
| Surname | Boyd |
| Given Name | Robert A |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Colorado |
| 1935 Residence (City) | Arvada Town |
| 1935 Residence (County) | Jefferson |
| Additional Details | |
| Class of Worker | 0 |
| Highest Grade | C 3 |
| 1935 Residence | Same place |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
| Township / Ward | Arvada Town |
| Est. Birth Year | ~1918 |
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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Robert | Age | Birth yr |
|---|---|---|---|---|
| Ray Boyd | Head | — | 51 | ~1889 |
| Robert Boyd | Son | — | 22 | ~1918 |
| Raymond Boyd | Son | — | 15 | ~1925 |
| Alice Boyd | Spouse | — | 50 | ~1890 |
Census Appearances
1920
Adams, Colorado
Son, age 3
Adams, Colorado · implied b. ~1917 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Boyd |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | Colorado |
| Father's Birthplace | Colorado |
| Mother's Birthplace | Colorado |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
1930
Jefferson, Colorado
Son, age 13
Jefferson, Colorado · implied b. ~1917 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Boyd |
| Given Name | Robert G |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Colorado |
| Father's Birthplace | Colorado |
| Mother's Birthplace | Colorado |
| Can Read/Write | Yes |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
1940
Jefferson-County, Colorado
Son, age 22
Jefferson-County, Colorado · implied b. ~1918 — 4 household members
| Surname | Boyd |
| Given Name | Robert A |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Colorado |
| 1935 Residence (City) | Arvada Town |
| 1935 Residence (County) | Jefferson |
| Class of Worker | 0 |
| Highest Grade | C 3 |
| 1935 Residence | Same place |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
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 Boyd across 3 US Census years (1920, 1930 and 1940) in 3 locations, using XGBoost record linkage. Identified parents: father R Boyd (~0.92 confidence) and father Ray Boyd (~0.92 confidence) and mother Alice Boyd (~0.92 confidence) and mother Alice Boyd (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
R Boyd
b. ~1888
Source father
● Household
· direct · ~0.92
Father
Ray Boyd
b. ~1889
Source father
● Household
· direct · ~0.92
Mother
Alice Boyd
b. ~1890
Source mother
● Household
· direct · ~0.92
Mother
Alice Boyd
b. ~1891
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Robert Boyd
Son · 1940 · age 22 · b. ~1918 · Colorado
★ You are viewing this record
Sibling
Raymond Boyd
Sibling · 1940 · age 15
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 — Jefferson-County, Colorado
Open full size
1940 US Federal Census — Jefferson-County, Colorado
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00465-00386)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Betty Jane Lindsey | 12 | Daughter | — | Missouri |
| 42 | Walter Poppert | 48 | Head | Laborer | Nebraska |
| 43 | Nellie Poppert | 45 | Wife | Laundress | Nebraska |
| 44 | Evelyn Poppert | 25 | Daughter | Stenographer | Nebraska |
| 45 | Dale Poppert | 19 | Son | — | Nebraska |
| 46 | Henry R Anderson | 55 | Head | Bookkeeper | Georgia |
| 47 | Fay Anderson | 45 | Wife | Dressmaker | Arkansas |
| 48 | Clifton Anderson | 14 | Son | — | Oklahoma |
| 49 | Albert Richman | 64 | Head | — | Indiana |
| 50 | Naomi Richman | 68 | Wife | — | Indiana |
| 51 | Robert S Scarffe | 55 | Head | Minister | England |
| 52 | Lilac L Scarffe | 43 | Wife | — | Colorado |
| 53 | Robert W Scarffe | 20 | Son | — | Colorado |
| 54 | Albert W Scarffe | 14 | Son | — | Colorado |
| 55 | Leland S Rigg | 50 | Head | Trucking | California |
| 56 | Clara G Rigg | 47 | Wife | — | Colorado |
| 57 | William N Rigg | 21 | Son | Trucking | Colorado |
| 58 | Raymond Riley | 30 | Head | Driver | Wisconsin |
| 59 | Hazel Riley | 27 | Wife | — | Colorado |
| 60 | Rayleen Riley | 6 | Daughter | — | Colorado |
| 61 | Ray Sailer | 44 | Boarder | Laborer | Iowa |
| 62 | Joseph Nokomiezny | 24 | Head | Truck Driver | West Virginia |
| 63 | Josephine Nokomiezny | 19 | Wife | — | Colorado |
| 64 | William A Price | 31 | Head | Purchasing Agent | Illinois |
| 65 | M. Ruth Price | 34 | Wife | — | Indiana |
| 66 | Ruth L Price | 14 | Daughter | — | Indiana |
| 67 | Robert F Price | 11 | Daughter | — | Colorado |
| 68 | Willette A Price | 3 | Daughter | — | Colorado |
| 69 | Ray J Boyd | 51 | Head | Farmer | Colorado |
| 70 | Alice Boyd | 50 | Wife | — | Colorado |
| 71 | Robert A Boyd THIS PERSON | 22 | Son | — | Colorado |
| 72 | Raymond Jr Boyd | 15 | Son | — | Colorado |
| 73 | Patrick Goodwin | 47 | Head | Switchman | Canada-English |
| 74 | Marie Goodwin | 37 | Wife | — | Colorado |
| 75 | Rosemarie Goodwin | 17 | Daughter | — | Colorado |
| 76 | Terrence Goodwin | 7 | Son | — | Colorado |
| 77 | Robert Goodwin | 6 | Son | — | Colorado |
| 78 | Phylabe E Houston | 29 | Head | Teacher | Colorado |
| 79 | Eva Mountain | 60 | Head | Cashier | Indiana |
| 80 | Charles Branaman | 53 | Head | Laborer | Colorado |
Pedigree Summary
Robert + 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)