WJ
William Johnson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Baltimore-City-County, Maryland
Our Model Tree links this William Johnson across the 1920, 1930 and 1940 US Censuses in Baltimore-City-County, Maryland (XGBoost, ~Confirmed), with identified parents William & William — first a son (b.~1906), then head of a 3-person household.
Age 34
b. ~1906
Male
Son
Born: Maryland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Baltimore-City-County, Maryland |
| Surname | Johnson |
| Given Name | William Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 34 |
| Marital Status | Married |
| Birthplace | Maryland |
| 1935 Residence (City) | Baltimore City |
| 1935 Residence (County) | Baltimore City |
| Additional Details | |
| Occupation | Teacher |
| Industry | Public High School |
| Class of Worker | GW |
| Hours Worked | 25 |
| Income (1939) | 134 |
| Highest Grade | C 4 |
| 1935 Residence | Same place |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Occupation | Teacher |
| Township / Ward | Baltimore City |
| Est. Birth Year | ~1906 |
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 William | Age | Birth yr |
|---|---|---|---|---|
| Agnes Johnson | Daughter | — | 31 | ~1909 |
| William Johnson | Head | — | 70 | ~1870 |
| William Johnson | Son | — | 34 | ~1906 |
Census Appearances
1920
None, Maryland
Son, age 10
None, Maryland · implied b. ~1910 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | William Jr |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1930
Baltimore, Maryland
Son, age 21
Baltimore, Maryland · implied b. ~1909 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | William Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Occupation | Laborer |
| Industry | Odd Jobs |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Baltimore-City-County, Maryland
Son, age 34
Baltimore-City-County, Maryland · implied b. ~1906 — 3 household members
| Surname | Johnson |
| Given Name | William Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 34 |
| Marital Status | Married |
| Birthplace | Maryland |
| 1935 Residence (City) | Baltimore City |
| 1935 Residence (County) | Baltimore City |
| Occupation | Teacher |
| Industry | Public High School |
| Class of Worker | GW |
| Hours Worked | 25 |
| Income (1939) | 134 |
| Highest Grade | C 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 Johnson across 3 US Census years (1920, 1930 and 1940) in 3 locations, using XGBoost record linkage. Identified parents: father William Johnson (~0.92 confidence) and father William Johnson (~0.92 confidence) and father William Johnson (~0.92 confidence) and mother Mary Johnson (~0.92 confidence) and mother Ida Johnson (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
William Johnson
b. ~1870
Source father
● Household
· direct · ~0.92
Father
William Johnson
b. ~1892
Source father
● Household
· direct · ~0.92
Father
William Johnson
b. ~1878
Source father
● Household
· direct · ~0.92
Mother
Mary Johnson
b. ~1882
Source mother
● Household
· direct · ~0.92
Mother
Ida Johnson
b. ~1890
Source mother
● Household
· direct · ~0.92
This person
Anchor record
William Johnson
Son · 1940 · age 34 · b. ~1906 · Maryland
★ You are viewing this record
Sibling
Agnes Johnson
Sibling · 1940 · age 31
Source co-child of head (derived)
● Co-child · derived · ~0.88
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Baltimore-City-County, Maryland
Open full size
1940 US Federal Census — Baltimore-City-County, Maryland
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01529-00223)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Bertha Finney | 43 | Head | — | Virginia |
| 2 | William Finney | 27 | Son | Stevedore | Virginia |
| 3 | Louise Finney | 25 | Son | Laborer | Virginia |
| 4 | Melvin Mcneal | 32 | Lodger | Cook | South Carolina |
| 5 | Robert Parit | 27 | Lodger | Laborer | South Carolina |
| 6 | Annie Browns | 23 | Lodger | Housework | Virginia |
| 7 | William Johnson | 70 | Head | — | Maryland |
| 8 | William Jr. Johnson THIS PERSON | 34 | Son | Teacher | Maryland |
| 9 | Agnes Johnson | 31 | Daughter | Cashier | Maryland |
| 10 | Elizabeth Sewall | 52 | Head | Housework | Maryland |
| 11 | Agnes Aguilla | 61 | Lodger | Housework | Maryland |
| 12 | Alex Aguilla | 62 | Lodger | — | Virginia |
| 13 | Marion Williams | 58 | Lodger | Maker Comp | Maryland |
| 14 | Thomas Watt | 42 | Head | Laborer | South Carolina |
| 15 | Lucy Watt | 32 | Wife | — | South Carolina |
| 16 | Johnny M. Watt | 15 | Daughter | — | South Carolina |
| 17 | Melvin Watt | 18 | Son | Porter | South Carolina |
| 18 | Lillie Watt | 19 | Daughter in law | Housework | Pennsylvania |
| 19 | George Petty | 30 | Lodger | Porter | South Carolina |
| 20 | James Robinson | 26 | Lodger | Laborer | South Carolina |
| 21 | Percy Lewis | 36 | Head | Laborer | Maryland |
| 22 | Blanche Lewis | 35 | Wife | Housework | Maryland |
| 23 | Jannie Chavis | 57 | Mother in law | — | North Carolina |
| 24 | Thelma Hardy | 8 | Lodger | — | Maryland |
| 25 | Nellie Downs | 39 | Lodger | Maid | Maryland |
| 26 | Mary Gardner | 42 | Head | — | Maryland |
| 27 | Catherine Evins | 5 | Daughter | — | Maryland |
| 28 | James Jr. Evins | 3 | Son | — | Maryland |
| 29 | Audrey Evins | 2 | Daughter | — | Maryland |
| 30 | Wardell Evins | 1 | Son | — | Maryland |
| 31 | James Evins | 40 | Lodger | Laborer | North Carolina |
| 32 | Clara Wilson | 64 | Head | Housework | Virginia |
| 33 | Montel Wilson | 39 | Son | Truck Driver | Virginia |
| 34 | Clara Queen | 15 | Granddaughter | — | Maryland |
| 35 | Samuel Evans | 39 | Head | Laborer | Virginia |
| 36 | Pearl Evans | 37 | Wife | Beautician | Virginia |
| 37 | Roosevelt Evans | 20 | Son | Laborer | Virginia |
| 38 | Doretha Evans | 17 | Daughter | Helper | Virginia |
| 39 | Jasper Evans | 16 | Son | Helper | Virginia |
| 40 | Samuel Evans | 14 | Son | — | Virginia |
Pedigree Summary
William + 1 sibling
Gen 1 · 5 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)