RM
Robert Mason — 1940 US Census Record
Model Tree available1940 United States Federal Census · Denver-County, Colorado
Our Model Tree links this Robert Mason across the 1920, 1930 and 1940 US Censuses in Denver-County, Colorado (XGBoost, ~Confirmed), with identified parents Beryl & James — first a son (b.~1913), then head of a 6-person household.
Age 27
b. ~1913
Male
Son
Born: Indiana
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Denver-County, Colorado |
| Surname | Mason |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Single |
| Birthplace | Indiana |
| 1935 Residence (City) | Denver City & County |
| 1935 Residence (County) | Denver |
| Additional Details | |
| Occupation | Salesman |
| Industry | Accounting machines |
| Class of Worker | PW |
| Hours Worked | 72 |
| Income (1939) | 1000 |
| Highest Grade | H-4 |
| 1935 Residence | Same place |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
| Occupation | Salesman |
| Township / Ward | Denver City County |
| Est. Birth Year | ~1913 |
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 Robert | Age | Birth yr |
|---|---|---|---|---|
| Gwyn Hill | Daughter | — | 7 | ~1933 |
| Lillis Hill | Daughter | — | 25 | ~1915 |
| James Mason | Head | — | 60 | ~1880 |
| Hiram Hill | Other | — | 32 | ~1908 |
| Robert Mason | Son | — | 27 | ~1913 |
| Beryl Mason | Spouse | — | 64 | ~1876 |
Census Appearances
1920
Denver, Colorado
Son, age 7
Denver, Colorado · implied b. ~1913 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mason |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 7 |
| Marital Status | Single |
| Birthplace | Indiana |
| Father's Birthplace | North Carolina |
| Mother's Birthplace | Indiana |
| Occupation | none |
| Can Read | Yes |
| Speaks English | Yes |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
1930
Denver, Colorado
Son, age 17
Denver, Colorado · implied b. ~1913 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mason |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Indiana |
| Father's Birthplace | North Carolina |
| Mother's Birthplace | Indiana |
| Can Read/Write | Yes |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
1940
Denver-County, Colorado
Son, age 27
Denver-County, Colorado · implied b. ~1913 — 6 household members
| Surname | Mason |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Single |
| Birthplace | Indiana |
| 1935 Residence (City) | Denver City & County |
| 1935 Residence (County) | Denver |
| Occupation | Salesman |
| Industry | Accounting machines |
| Class of Worker | PW |
| Hours Worked | 72 |
| Income (1939) | 1000 |
| Highest Grade | H-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 Robert Mason across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Beryl Mason (~0.92 confidence) and father James Mason (~0.92 confidence) and father James Mason (~0.92 confidence) and father James Mason (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Beryl Mason
b. ~1877
Source mother
● Household
· direct · ~0.92
Father
James Mason
b. ~1877
Source father
● Household
· direct · ~0.92
Father
James Mason
b. ~1880
Source father
● Household
· direct · ~0.92
Father
James Mason
b. ~1881
Source father
● Household
· direct · ~0.92
This person
Anchor record
Robert Mason
Son · 1940 · age 27 · b. ~1913 · Colorado
★ You are viewing this record
Sibling
Lillis Hill
Sibling · 1940 · age 25
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Gwyn Hill
Sibling · 1940 · age 7
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 — Denver-County, Colorado
Open full size
1940 US Federal Census — Denver-County, Colorado
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00486-00091)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Josephine Sternac | 61 | Head | — | Austria |
| 2 | Antye Sternac | 30 | Daughter | Machinist | Colorado |
| 3 | Mildred Sternac | 31 | Daughter | Power Operator | Idaho |
| 4 | Margaret Gilchrist | 78 | Head | — | New Hampshire |
| 5 | Helen Mattersen | 21 | Lodger | Clerk | Colorado |
| 6 | Eleanor Hayes | 67 | Head | — | Illinois |
| 7 | William Sommers | 59 | Head | Ditch Digger | New York |
| 8 | Dean Moore | 40 | Head | Foreman | Illinois |
| 9 | Breta Moore | 38 | Wife | — | Illinois |
| 10 | Robert Moore | 6 | Son | — | Colorado |
| 11 | Leilla Nixon | 66 | Head | — | Illinois |
| 12 | Fedder Schmidt | 55 | Head | Carpenter | Iowa |
| 13 | Ethel Ann Schmidt | 53 | Wife | — | Iowa |
| 14 | Elizabeth Schmidt | 21 | Daughter | — | Colorado |
| 15 | Herbert Schmidt | 19 | Son | Carpenter | Colorado |
| 16 | Susanna Williams | 75 | Head | — | England |
| 17 | Susan Williams | 39 | Daughter | — | Wales |
| 18 | Augusta Harlacher | 80 | Head | — | Ohio |
| 19 | Anna Williams | 45 | Daughter | Bookkeeper | Kansas |
| 20 | Martin Rule | 64 | Head | — | Kentucky |
| 21 | Catherine Rule | 25 | Daughter | Time Keeper | Kentucky |
| 22 | Sarah Gfeller | 59 | Maid | Housekeeper | Missouri |
| 23 | Melvin Wright | 35 | Head | Bookkeeper | Iowa |
| 24 | Margaret Wright | 26 | Wife | — | Mississippi |
| 25 | Barbara Lee Wright | 3 | Daughter | — | Colorado |
| 26 | Ruth Wendroff | 46 | Head | Clerk | Illinois |
| 27 | Margaret Wendroff | 23 | Daughter | Stenographer | Colorado |
| 28 | Paul Wendroff | 20 | Son | Clerk | Colorado |
| 29 | Patricia Wendroff | 17 | Daughter | — | Colorado |
| 30 | Ruth Ellen Wendroff | 12 | Daughter | — | Colorado |
| 31 | Kate O'Connell | 69 | Mother | — | Illinois |
| 32 | Thomas H. Hertle | 60 | Head | Machinist | Colorado |
| 33 | Flora G. Hertle | 54 | Wife | — | Colorado |
| 34 | Katherine Watkins | 72 | Sister-in-law | — | Wisconsin |
| 35 | James Mason | 60 | Head | Manager | N. Carolina |
| 36 | Beryl Mason | 64 | Wife | — | Indiana |
| 37 | Robert Mason THIS PERSON | 27 | Son | Salesman | Indiana |
| 38 | Hiram Hill | 32 | Son-in-law | Supervisor | Illinois |
| 39 | Lillis Hill | 25 | Daughter | — | Illinois |
| 40 | Gwyn Hill | 7 | Daughter | — | Colorado |
Pedigree Summary
Robert + 2 siblings
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)