JW
John Williams — 1940 US Census Record
Model Tree available1940 United States Federal Census · Baltimore-County, Maryland
Our Model Tree links this John Williams across the 1920, 1930 and 1940 US Censuses in Baltimore-County, Maryland (XGBoost, ~Confirmed), with identified parents John & John — first a head (b.~1915), then head of a 3-person household.
Age 25
b. ~1915
Male
Head
Born: Maryland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Baltimore-County, Maryland |
| Surname | Williams |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | Black |
| Age | 25 |
| Marital Status | Married |
| Birthplace | Maryland |
| 1935 Residence (City) | London |
| 1935 Residence (County) | Baltimore |
| Additional Details | |
| Occupation | Laborer |
| Industry | Private house |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1000 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Occupation | Laborer |
| Township / Ward | London |
| Est. Birth Year | ~1915 |
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 John | Age | Birth yr |
|---|---|---|---|---|
| Janice Williams | Daughter | — | 7 | ~1933 |
| John Williams | Head | — | 25 | ~1915 |
| Helen Williams | Spouse | — | 28 | ~1912 |
Census Appearances
1920
Baltimore, Maryland
Son, age 5
Baltimore, Maryland · implied b. ~1915 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Williams |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 5 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Speaks English | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1930
Baltimore, Maryland
Son, age 15
Baltimore, Maryland · implied b. ~1915 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Williams |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Occupation | Laborer |
| Industry | Road Construction |
| Class of Worker | W |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Baltimore-County, Maryland
Head, age 25
Baltimore-County, Maryland · implied b. ~1915 — 3 household members
| Surname | Williams |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | Black |
| Age | 25 |
| Marital Status | Married |
| Birthplace | Maryland |
| 1935 Residence (City) | London |
| 1935 Residence (County) | Baltimore |
| Occupation | Laborer |
| Industry | Private house |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1000 |
| Highest Grade | No 8 |
| 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 John Williams across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father John Williams (~0.92 confidence) and father John Williams (~0.92 confidence) and mother Annie Williams (~0.92 confidence) and mother Sarah Williams (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
John Williams
b. ~1891
Source father
● Household
· direct · ~0.92
Father
John Williams
b. ~1872
Source father
● Household
· direct · ~0.92
Mother
Annie Williams
b. ~1896
Source mother
● Household
· direct · ~0.92
Mother
Sarah Williams
b. ~1875
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Williams
Head · 1940 · age 25 · b. ~1915 · Maryland
★ 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 — Baltimore-County, Maryland
Open full size
1940 US Federal Census — Baltimore-County, Maryland
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01505-00252)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Anna Ayres | 27 | Wife | — | West Virginia |
| 42 | Walter Ayres | 10 | Son | — | Maryland |
| 43 | John David Ayres | 8 | Son | — | Maryland |
| 44 | Mildred Ayres | 6 | Daughter | — | Maryland |
| 45 | Anna May Ayres | 4 | Daughter | — | Maryland |
| 46 | Charles Ayres | 2 | Son | — | Maryland |
| 47 | George Pratt | 50 | Head | Laborer | Maryland |
| 48 | Mary Pratt | 51 | Wife | — | Maryland |
| 49 | Howard Blake | 57 | Head | Laborer | Maryland |
| 50 | Lillie Blake | 58 | Wife | Maid | Maryland |
| 51 | Lillie Gardner | 45 | Lodger | Laundress | Maryland |
| 52 | John Williams THIS PERSON | 25 | Head | Laborer | Maryland |
| 53 | Helen Williams | 28 | Wife | Maid | Maryland |
| 54 | Janice Williams | 7 | Daughter | — | Maryland |
| 55 | Ella Bishop | 52 | Head | — | Maryland |
| 56 | Albert Bishop | 24 | Son | Laborer | Maryland |
| 57 | Joseph Bishop | 14 | Son | — | Maryland |
| 58 | William Bishop | 26 | Son | Chauffeur | Maryland |
| 59 | Susie Bishop | 26 | Daughter-in-law | — | Virginia |
| 60 | John Brown | 35 | Head | Laborer | Maryland |
| 61 | Hattie Brown | 58 | Mother | — | Maryland |
| 62 | John Edward Brown | 12 | Brother | — | Maryland |
| 63 | Mildred Brown | 24 | Sister | Maid | Maryland |
| 64 | Georgia May Brown | 2 | Niece | — | Maryland |
| 65 | Mary Mack | 57 | Head | — | Maryland |
| 66 | Mary Waters | 24 | Niece | Cook | Maryland |
| 67 | Calvin Gardner | 24 | Nephew | Laborer | Maryland |
| 68 | Victoria Gardner | 19 | Niece | — | Virginia |
| 69 | Victoria A. Gardner | 1 | Niece | — | Maryland |
| 70 | Edward Williams | 42 | Head | Cleaning | Maryland |
| 71 | Gladys Williams | 40 | Wife | Laundress | Maryland |
| 72 | James Edward Williams | 21 | Son | — | Maryland |
| 73 | Phylis Williams | 14 | Daughter | — | Maryland |
| 74 | Howard Williams | 12 | Son | — | Maryland |
| 75 | Doris Williams | 10 | Daughter | — | Maryland |
| 76 | Benjamin Berry | 25 | Head | Laborer | Maryland |
| 77 | Catherine Berry | 23 | Wife | Maid | Maryland |
| 78 | Juanita Hill | 17 | Sister-in-law | Servant | Maryland |
| 79 | Margaret Hill | 15 | Sister-in-law | — | Maryland |
| 80 | Chester Anderson | 39 | Head | Truck Driver | Maryland |
Pedigree Summary
John
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)