JM
John Mason — 1940 US Census Record
Linked across censuses1940 United States Federal Census · San-Bernardino-County, California
Our Model Tree links this John Mason across the 1920, 1930 and 1940 US Censuses in San-Bernardino-County, California (XGBoost, ~Confirmed) — first a head (b.~1867), then head of a 4-person household.
Age 73
b. ~1867
Male
Head
Born: Ohio
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | San-Bernardino-County, California |
| Surname | Mason |
| Given Name | John P. |
| Relationship to Head | head |
| Sex | M |
| Color / Race | White |
| Age | 73 |
| Marital Status | Married |
| Birthplace | Ohio |
| 1935 Residence (City) | Redlands City |
| 1935 Residence (County) | San Bernardino |
| Additional Details | |
| Occupation | Doctor |
| Industry | Own office |
| Class of Worker | OA |
| Hours Worked | 44 |
| Income (1939) | 478 |
| Highest Grade | C 4 |
| 1935 Residence | Same place |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
| Occupation | Doctor |
| Township / Ward | Redlands City |
| Est. Birth Year | ~1867 |
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 John | Age | Birth yr |
|---|---|---|---|---|
| John Mason | Head | — | 73 | ~1867 |
| Donald Edwards | Other | — | 15 | ~1925 |
| John Hatfield | Son | — | 9 | ~1931 |
| Dorothy Mason | Spouse | — | 54 | ~1886 |
Census Appearances
1920
San Bernardino, …
Head, age 53
San Bernardino, California · implied b. ~1867 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mason |
| Given Name | John P |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 53 |
| Marital Status | Widowed |
| Birthplace | Ohio |
| Father's Birthplace | United States |
| Mother's Birthplace | United States |
| Occupation | Commercial Traveler |
| Industry | Automobile |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Home Owned/Rented | R |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
1930
San Bernardino, …
Head, age 63
San Bernardino, California · implied b. ~1867 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mason |
| Given Name | John P. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 63 |
| Marital Status | Married |
| Birthplace | Ohio |
| Age at First Marriage | 13 |
| Father's Birthplace | Germany |
| Mother's Birthplace | England |
| Occupation | Chiropractor |
| Industry | Own home |
| Class of Worker | OA |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Home Value / Rent | 25000 |
| Radio Set | R |
| Veteran | Yes |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
1940
San-Bernardino-County, California
Head, age 73
San-Bernardino-County, California · implied b. ~1867 — 4 household members
| Surname | Mason |
| Given Name | John P. |
| Relationship to Head | head |
| Sex | M |
| Color / Race | White |
| Age | 73 |
| Marital Status | Married |
| Birthplace | Ohio |
| 1935 Residence (City) | Redlands City |
| 1935 Residence (County) | San Bernardino |
| Occupation | Doctor |
| Industry | Own office |
| Class of Worker | OA |
| Hours Worked | 44 |
| Income (1939) | 478 |
| Highest Grade | C 4 |
| 1935 Residence | Same place |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
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 John Mason across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Mason
Head · 1940 · age 73 · b. ~1867 · 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 — San-Bernardino-County, California
Open full size
1940 US Federal Census — San-Bernardino-County, California
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00291-00384)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Jean Blumenthal | 40 | wife | Housekeeper | Illinois |
| 2 | Janet Blumenthal | 10 | daughter | — | California |
| 3 | Charles Koelsche | 33 | head | Chemistry Teacher | Washington |
| 4 | Lucy P. Koelsche | 31 | wife | — | New Mexico |
| 5 | Betty Jean Koelsche | 5 | daughter | — | Texas |
| 6 | Flora D. Koelsche | 66 | mother | — | Indiana |
| 7 | Raymond Walker | 21 | brother | Salesman | New Mexico |
| 8 | Frank H. Folkins | 55 | head | Physician | Iowa |
| 9 | Mary B. Folkins | 54 | wife | — | Massachusetts |
| 10 | Hugh M. Folkins | 19 | son | — | California |
| 11 | Julia Folkins | 75 | head | — | Illinois |
| 12 | Mary Wadsworth | 77 | head | — | Illinois |
| 13 | Martin Sweeney | 78 | head | Attorney | New York |
| 14 | Anna C. Sweeney | 68 | wife | President Board | Pennsylvania |
| 15 | Jane Macdonald | 40 | daughter | — | New York |
| 16 | Florence Hippen | 35 | housekeeper | Housekeeper | Dakota |
| 17 | James F. Wheat | 69 | head | Realtor | Minnesota |
| 18 | Gertrude Wheat | 64 | wife | — | Indiana |
| 19 | John P. Mason THIS PERSON | 73 | head | Doctor | Ohio |
| 20 | Dorothy Mason | 54 | wife | Doctor Asst. | Michigan |
| 21 | Donald Edwards | 15 | grandson | — | California |
| 22 | John Hatfield | 9 | son | — | California |
| 23 | Donald Stewart | 34 | head | Instructor | Illinois |
| 24 | Louise Stewart | 37 | wife | Sub Teacher | Indiana |
| 25 | Frances Lambers | 65 | mother-in-law | — | Michigan |
| 26 | Lillian Zech | 49 | head | — | Michigan |
| 27 | Marie Osborne | 75 | maid | Maid | No Carolina |
| 28 | Buel Beels | 66 | head | — | Tennessee |
| 29 | Adelia Beels | 39 | daughter | Charge D'Affaires | Illinois |
| 30 | Minerva Beaucamp | 57 | maid | Maid | Arkansas |
| 31 | Lindley Winston | 79 | head | Farmer | Indiana |
| 32 | Gladys Winston | 56 | wife | — | Virginia |
| 33 | Lindley Jr. Winston | 14 | son | — | California |
| 34 | Mary Winston | 10 | daughter | — | California |
| 35 | Margaret Williams | 44 | head | — | Missouri |
| 36 | Elin Williams | 13 | son | — | California |
| 37 | Catherine Galbreath | 37 | niece | — | Wisconsin |
| 38 | Nancy Galbreath | 10 | niece | — | California |
| 39 | Adelia Vonder Hoop | 36 | maid | Maid | Iowa |
| 40 | Frank Mccourtney | 53 | head | — | Cooks English |
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)