WM
William Mason — 1940 US Census Record
Model Tree available1940 United States Federal Census · St.-Louis-County, Missouri
Our Model Tree links this William Mason across the 1920, 1930 and 1940 US Censuses in St.-Louis-County, Missouri (XGBoost, ~Confirmed), with identified parents Mary & Mary — first a son (b.~1902), then head of a 6-person household.
Age 38
b. ~1902
Male
Son
Born: Tennessee
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | St.-Louis-County, Missouri |
| Surname | Mason |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 38 |
| Marital Status | Married |
| Birthplace | Tennessee |
| 1935 Residence (City) | Kirkwood City |
| 1935 Residence (County) | St. Louis |
| Additional Details | |
| Occupation | Manager |
| Industry | Retail Auto Repair |
| Class of Worker | PW |
| Hours Worked | 54 |
| Income (1939) | 1170 |
| Highest Grade | C 3 |
| 1935 Residence | Same place |
| Birth State | Tennessee |
| Birth Country | United States |
| Birthplace (normalized) | tennessee |
| Occupation | Manager |
| Township / Ward | Kirkwood City |
| Est. Birth Year | ~1902 |
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 William | Age | Birth yr |
|---|---|---|---|---|
| William Mason | Head | — | 66 | ~1874 |
| William Mason | Other | — | 12 | ~1928 |
| Jean Mason | Other | — | 13 | ~1927 |
| Cora Mason | Other | — | 35 | ~1905 |
| William Mason | Son | — | 38 | ~1902 |
| Mary Mason | Spouse | — | 68 | ~1872 |
Census Appearances
1920
St Louis, …
Son, age 18
St Louis, Missouri · implied b. ~1902 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mason |
| Given Name | William C. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Tennessee |
| Father's Birthplace | Tennessee |
| Mother's Birthplace | Tennessee |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Tennessee |
| Birth Country | United States |
| Birthplace (normalized) | tennessee |
1930
St Louis, …
Other, age 28
St Louis, Missouri · implied b. ~1902 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mason |
| Given Name | William |
| Relationship to Head | Son-in-law |
| Sex | M |
| Color / Race | White |
| Age | 28 |
| Marital Status | Married |
| Birthplace | Tennessee |
| Age at First Marriage | 24 |
| Father's Birthplace | Tennessee |
| Mother's Birthplace | Tennessee |
| Occupation | Mechanic |
| Industry | Construction Co |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Tennessee |
| Birth Country | United States |
| Birthplace (normalized) | tennessee |
1940
St.-Louis-County, Missouri
Son, age 38
St.-Louis-County, Missouri · implied b. ~1902 — 6 household members
| Surname | Mason |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 38 |
| Marital Status | Married |
| Birthplace | Tennessee |
| 1935 Residence (City) | Kirkwood City |
| 1935 Residence (County) | St. Louis |
| Occupation | Manager |
| Industry | Retail Auto Repair |
| Class of Worker | PW |
| Hours Worked | 54 |
| Income (1939) | 1170 |
| Highest Grade | C 3 |
| 1935 Residence | Same place |
| Birth State | Tennessee |
| Birth Country | United States |
| Birthplace (normalized) | tennessee |
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 William Mason across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Mary Mason (~0.92 confidence) and mother Mary Mason (~0.92 confidence) and father William Mason (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Mary Mason
b. ~1870
Source mother
● Household
· direct · ~0.92
Mother
Mary Mason
b. ~1872
Source mother
● Household
· direct · ~0.92
Father
William Mason
b. ~1874
Source father
● Household
· direct · ~0.92
This person
Anchor record
William Mason
Son · 1940 · age 38 · b. ~1902 · Missouri
★ 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 — St.-Louis-County, Missouri
Open full size
1940 US Federal Census — St.-Louis-County, Missouri
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02147-00079)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Otis Turner | 68 | Head | Salesman | Illinois |
| 2 | Eva Turner | 61 | Wife | — | Illinois |
| 3 | Marwood Konold | 34 | Head | Salesman | So. Dakota |
| 4 | Mildred Konold | 32 | Wife | — | Missouri |
| 5 | David Konold | 1 | Son | — | Missouri |
| 6 | Earll Peabody | 66 | Head | Special Examiner | Missouri |
| 7 | Jane Peabody | 57 | Wife | — | Wisconsin |
| 8 | Howard Becker | 42 | Head | Copywriter | Missouri |
| 9 | Eugenia Becker | 42 | Wife | Librarian | Missouri |
| 10 | Susan Marsh | 74 | Mother-in-law | — | Indiana |
| 11 | Earl Godbold | 35 | Head | Salesman | Texas |
| 12 | Insy Godbold | 32 | Wife | — | Mississippi |
| 13 | William Godbold | 2 | Son | — | Missouri |
| 14 | Eleanor Adams | 28 | Servant | Servant | Mississippi |
| 15 | John Lehman | 65 | Head | — | Missouri |
| 16 | Anna Lehman | 63 | Sister | — | Missouri |
| 17 | Rose Lehman | 58 | Sister | — | Missouri |
| 18 | Eva Lehman | 52 | Sister | — | Missouri |
| 19 | George Lehman | 47 | Brother | — | Missouri |
| 20 | John Murphy | 50 | Head | Lawyer | Iowa |
| 21 | Anna Murphy | 48 | Wife | — | Iowa |
| 22 | Sam Murphy | 22 | Son | — | Illinois |
| 23 | John Murphy | 20 | Son | — | Iowa |
| 24 | Alice Murphy | 16 | Daughter | — | Iowa |
| 25 | Joe Murphy | 14 | Son | — | Missouri |
| 26 | Robert Murphy | 12 | Son | — | Washington D.C. |
| 27 | William Mason | 66 | Head | Clerk | Tennessee |
| 28 | Mary Mason | 68 | Wife | — | Tennessee |
| 29 | William Mason THIS PERSON | 38 | Son | Manager | Tennessee |
| 30 | Cora Mason | 35 | Daughter-in-law | — | Missouri |
| 31 | Jean Mason | 13 | Grand-daughter | — | Missouri |
| 32 | William Mason | 12 | Grand-son | — | Missouri |
| 33 | Floyd E. Bates | 51 | Head | Chief Engineer | Iowa |
| 34 | Alice C. Bates | 52 | Wife | — | Wisconsin |
| 35 | Robert Bates | 18 | Son | — | Missouri |
| 36 | Alvin Hecker | 38 | Head | Electrical Engineer | Missouri |
| 37 | Virginia Hecker | 40 | Wife | — | Missouri |
| 38 | William Paston | 48 | Head | Salesman | Washington |
| 39 | Irene Paston | 34 | Wife | — | Michigan |
| 40 | Mary Patricia Paston | 15 | Daughter | — | Michigan |
Related Census Records
Pedigree Summary
William
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)