WM
William Mason — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Baltimore-County, Maryland
Our Model Tree links this William Mason across the 1920, 1930 and 1940 US Censuses in Baltimore-County, Maryland (XGBoost, ~Confirmed) — first a head (b.~1872), then head of a 7-person household.
Age 68
b. ~1872
Male
Head
Born: Maryland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Baltimore-County, Maryland |
| Surname | Mason |
| Given Name | William |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 68 |
| Marital Status | Married |
| Birthplace | Maryland |
| 1935 Residence (City) | 11 Dist |
| 1935 Residence (County) | Baltimore |
| Additional Details | |
| Occupation | Laborer |
| Class of Worker | PW |
| Hours Worked | 20 |
| Income (1939) | 988 |
| Highest Grade | No 4 |
| 1935 Residence | Same place |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Occupation | Laborer |
| Township / Ward | 11 Dist |
| Est. Birth Year | ~1872 |
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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| Malinda Toodle | Daughter | — | 32 | ~1908 |
| William Mason | Head | — | 68 | ~1872 |
| William Toodle | Other | — | 42 | ~1898 |
| Lester Toodle | Other | — | 4 | ~1936 |
| Thaddeus Mason | Son | — | 28 | ~1912 |
| Parish Mason | Son | — | 24 | ~1916 |
| Lydia Mason | Spouse | — | 68 | ~1872 |
Census Appearances
1920
Baltimore, Maryland
Head, age 45
Baltimore, Maryland · implied b. ~1875 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mason |
| Given Name | William H |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | Black |
| Age | 45 |
| Marital Status | Married |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Occupation | Laborer |
| Industry | Truck Farm |
| Class of Worker | W |
| Speaks English | Yes |
| Home Owned/Rented | R |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1930
Baltimore, Maryland
Head, age 55
Baltimore, Maryland · implied b. ~1875 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mason |
| Given Name | William H |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | Black |
| Age | 55 |
| Marital Status | Married |
| Birthplace | Maryland |
| Age at First Marriage | 20 |
| Father's Birthplace | Virginia |
| Mother's Birthplace | Virginia |
| Occupation | Laborer |
| Industry | Truck Farm |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Home Value / Rent | 500 |
| Veteran | No |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Baltimore-County, Maryland
Head, age 68
Baltimore-County, Maryland · implied b. ~1872 — 7 household members
| Surname | Mason |
| Given Name | William |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 68 |
| Marital Status | Married |
| Birthplace | Maryland |
| 1935 Residence (City) | 11 Dist |
| 1935 Residence (County) | Baltimore |
| Occupation | Laborer |
| Class of Worker | PW |
| Hours Worked | 20 |
| Income (1939) | 988 |
| Highest Grade | No 4 |
| 1935 Residence | Same place |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
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.
Show:
This person
Anchor record
William Mason
Head · 1940 · age 68 · b. ~1872 · Maryland
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Baltimore-County, Maryland
Open full size
1940 US Federal Census — Baltimore-County, Maryland
Page Contents
36 people indexed on this census page (nara:1940:m-t0627-01505-00764)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | J. Henry Ulrich | 52 | Head | Farmer | Maryland |
| 2 | Agnes K. Ulrich | 49 | Wife | Housewife | Maryland |
| 3 | Geo. Mathead Plimies | 52 | Head | Florist | Maryland |
| 4 | Nora Plimies | 50 | Wife | Housewife | Maryland |
| 5 | William Plimies | 25 | Son | Laborer | Maryland |
| 6 | Millard Plimies | 23 | Son | Truck Driver | Maryland |
| 7 | Matilda Plimies | 16 | Daughter | — | Maryland |
| 8 | Geo. M. Jr. Plimies | 15 | Son | — | Maryland |
| 9 | Alma Plimies | 11 | Daughter | — | Maryland |
| 10 | Norma Plimies | 7 | Daughter | — | Maryland |
| 11 | William Cloman | 61 | Laborer | Laborer | Maryland |
| 12 | William Mason THIS PERSON | 68 | Head | Laborer | Maryland |
| 13 | Lydia Mason | 68 | Wife | Housewife | Maryland |
| 14 | Thaddeus Mason | 28 | Son | Laborer | Maryland |
| 15 | Parish Mason | 24 | Son | Laborer | Maryland |
| 16 | Malinda Toodle | 32 | Daughter | Housework | Maryland |
| 17 | William Toodle | 42 | Son-in-law | Laborer | Maryland |
| 18 | Lester Toodle | 4 | Grandson | — | Maryland |
| 19 | Simon Brown | 62 | Head | Laborer | Maryland |
| 20 | Margaret Brown | 48 | Wife | Housewife | Maryland |
| 21 | Margaret Brown | 22 | Daughter | House Work | Maryland |
| 22 | Beatrice Brown | 19 | Daughter | House Work | Maryland |
| 23 | Alice Brown | 17 | Daughter | — | Maryland |
| 24 | Gladys Brown | 15 | Daughter | — | Maryland |
| 25 | Sam Johnson | 58 | Head | Track Laborer | Virginia |
| 26 | Janette Johnson | 64 | Wife | — | Maryland |
| 27 | Caroline Smythe | 18 | Niece | — | Maryland |
| 28 | Lewis Smythe | 5 | Nephew | — | Maryland |
| 29 | Samuel Preston | 30 | Head | Laborer | Maryland |
| 30 | Mabel Preston | 23 | Wife | — | Maryland |
| 31 | Mabel Preston | 5 | Daughter | — | Maryland |
| 32 | Eugene Preston | 7 | Daughter | — | Maryland |
| 33 | Frank Floray | 32 | Boarder | Track Man | Maryland |
| 34 | Harry Kroen | 49 | Head | Housewife | Maryland |
| 35 | Hattie Kroen | 45 | Wife | — | Maryland |
| 36 | Harry Meyers | 16 | Nephew | — | Maryland |
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)