RM
Richard Mason — 1940 US Census Record
Model Tree available1940 United States Federal Census · Ventura-County, California
Our Model Tree links this Richard Mason across the 1920, 1930 and 1940 US Censuses in Ventura-County, California (XGBoost, ~Confirmed), with identified parents Edward & Richard — first a son (b.~1917), then head of a 3-person household.
Age 23
b. ~1917
Male
Son
Born: California
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Ventura-County, California |
| Surname | Mason |
| Given Name | Richard H. Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | California |
| 1935 Residence (City) | Township 1 |
| 1935 Residence (County) | Ventura |
| Additional Details | |
| Occupation | Gardener |
| Industry | Private Estate |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 448 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
| Occupation | Gardener |
| Township / Ward | Township 1 |
| Est. Birth Year | ~1917 |
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 Richard | Age | Birth yr |
|---|---|---|---|---|
| Richard Mason | Son | — | 23 | ~1917 |
| Richard Mason | Head | — | 52 | ~1888 |
| Minnie Mason | Spouse | — | 48 | ~1892 |
Census Appearances
1920
Ventura, California
Son, age 4
Ventura, California · implied b. ~1916 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mason |
| Given Name | Richard H. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | England |
| Mother's Birthplace | England |
| Can Read | No |
| Can Write | No |
| Speaks English | Yes |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1930
Ventura, California
Son, age 13
Ventura, California · implied b. ~1917 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mason |
| Given Name | Richard H |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | England |
| Mother's Birthplace | England |
| Can Read/Write | Yes |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1940
Ventura-County, California
Son, age 23
Ventura-County, California · implied b. ~1917 — 3 household members
| Surname | Mason |
| Given Name | Richard H. Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | California |
| 1935 Residence (City) | Township 1 |
| 1935 Residence (County) | Ventura |
| Occupation | Gardener |
| Industry | Private Estate |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 448 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
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 Richard Mason across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Edward Mason (~0.92 confidence) and father Richard Mason (~0.92 confidence) and mother Minnie Mason (~0.92 confidence) and mother Minnie Mason (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Edward Mason
b. ~1889
Source father
● Household
· direct · ~0.92
Father
Richard Mason
b. ~1888
Source father
● Household
· direct · ~0.92
Mother
Minnie Mason
b. ~1892
Source mother
● Household
· direct · ~0.92
Mother
Minnie Mason
b. ~1892
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Richard Mason
Son · 1940 · age 23 · b. ~1917 · California
★ 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 — Ventura-County, California
Open full size
1940 US Federal Census — Ventura-County, California
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00363-00727)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Clara N. Smith | 72 | Head | — | Ohio |
| 42 | Angelina Smith | 93 | Mother | — | Ohio |
| 43 | Lee B. Smith | 57 | Brother | — | Nebraska |
| 44 | Helen A. Myrick | 51 | Head | — | Massachusetts |
| 45 | Placent J. D. Evans | 54 | Head | Rancher | California |
| 46 | Ida Evans | 49 | Wife | — | Tennessee |
| 47 | Mortimer J. Bragg | 50 | Head | Manager | California |
| 48 | Marie Bragg | 45 | Wife | — | California |
| 49 | Sheila Bragg | 12 | Daughter | — | Hawaii |
| 50 | James P. Arellanes | 45 | Head | Gardener | California |
| 51 | Lola Arellanes | 41 | Wife | — | California |
| 52 | Richard J. Arellanes | 4 | Son | — | California |
| 53 | Florence R. Arellanes | 2 | Daughter | — | California |
| 54 | Mack Brown | 52 | Head | Superintendent | Arkansas |
| 55 | Gertrude Brown | 48 | Wife | — | Arkansas |
| 56 | Richard H. Mason | 52 | Head | Chauffeur | England |
| 57 | Minnie V. Mason | 48 | Wife | — | California |
| 58 | Richard H. Jr. Mason THIS PERSON | 23 | Son | Gardener | California |
| 59 | Harry Z. Sinclair | 77 | Head | — | Ohio |
| 60 | Grace B. Sinclair | 72 | Wife | — | Indiana |
| 61 | Maude Mcnealy | 74 | Housekeeper | Housekeeper | Indiana |
| 62 | Richard Richards | 38 | Head | Geologist | California |
| 63 | Zetta Richards | 33 | Wife | — | Massachusetts |
| 64 | Lawrence W. Richards | 5 | Son | — | California |
| 65 | Diane Richards | 3 | Daughter | — | California |
| 66 | Pete Franscioni | 66 | Head | Assistant Foreman | Switzerland |
| 67 | Rosetta Franscioni | 64 | Wife | — | Missouri |
| 68 | Myron Braaten | 33 | Head | Rancher | North Dakota |
| 69 | Radali Braaten | 33 | Wife | — | Montana |
| 70 | Shirley Braaten | 13 | Daughter | — | North Dakota |
| 71 | Alice Braaten | 11 | Daughter | — | North Dakota |
| 72 | Marilyn Braaten | 9 | Daughter | — | California |
| 73 | Keith Braaten | 2 | Son | — | Nevada |
| 74 | Rondall Braaten | 3 | Son | — | California |
| 75 | Cyrus Braaten | 30 | Brother | Repairman | North Dakota |
| 76 | Thoddius Timms | 38 | Head | Superintendent | California |
| 77 | Helen E. Timms | 39 | Wife | — | California |
| 78 | Rowan Harmon | 54 | Head | Manager | Illinois |
| 79 | Mary Harmon | 51 | Wife | — | Michigan |
| 80 | Henry Nagahama | 52 | Cook | Cook | Japan |
Pedigree Summary
Richard
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)