WC
William Cox — 1940 US Census Record
Model Tree available1940 United States Federal Census · Baltimore-County, Maryland
Our Model Tree links this William Cox across the 1920, 1930 and 1940 US Censuses in Baltimore-County, Maryland (XGBoost, ~Confirmed), with identified parents Margaret & Joseph — first a son (b.~1913), then head of a 4-person household.
Age 27
b. ~1913
Male
Son
Born: Maryland
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Baltimore-County, Maryland |
| Surname | Cox |
| Given Name | William E. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Election District 12 |
| 1935 Residence (County) | Baltimore |
| Additional Details | |
| Occupation | Truck Driver |
| Class of Worker | PW |
| Hours Worked | 50 |
| Income (1939) | 750 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Occupation | Truck Driver |
| Township / Ward | Election District 12 |
| Est. Birth Year | ~1913 |
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 William | Age | Birth yr |
|---|---|---|---|---|
| Olga Moyer | Daughter | — | 26 | ~1914 |
| William Cox | Head | — | 63 | ~1877 |
| William Cox | Son | — | 27 | ~1913 |
| Naomi Cox | Spouse | — | 60 | ~1880 |
Census Appearances
1920
Baltimore, Maryland
Son, age 6
Baltimore, Maryland · implied b. ~1914 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cox |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 6 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Can Read | Yes |
| Can Write | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1930
Baltimore, Maryland
Son, age 16
Baltimore, Maryland · implied b. ~1914 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cox |
| Given Name | William L. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Can Read/Write | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Baltimore-County, Maryland
Son, age 27
Baltimore-County, Maryland · implied b. ~1913 — 4 household members
| Surname | Cox |
| Given Name | William E. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Election District 12 |
| 1935 Residence (County) | Baltimore |
| Occupation | Truck Driver |
| Class of Worker | PW |
| Hours Worked | 50 |
| Income (1939) | 750 |
| Highest Grade | Hs 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 Cox across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Margaret Cox (~0.92 confidence) and father Joseph Cox (~0.92 confidence) and father William Cox (~0.92 confidence) and mother Naomi Cox (~0.92 confidence) and mother Mary Cox (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Margaret Cox
b. ~1867
Source mother
● Household
· direct · ~0.92
Father
Joseph Cox
b. ~1873
Source father
● Household
· direct · ~0.92
Father
William Cox
b. ~1877
Source father
● Household
· direct · ~0.92
Mother
Naomi Cox
b. ~1880
Source mother
● Household
· direct · ~0.92
Mother
Mary Cox
b. ~1883
Source mother
● Household
· direct · ~0.92
This person
Anchor record
William Cox
Son · 1940 · age 27 · b. ~1913 · Maryland
★ You are viewing this record
Sibling
Olga Moyer
Sibling · 1940 · age 26
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-County, Maryland
Open full size
1940 US Federal Census — Baltimore-County, Maryland
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01505-00661)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Anna M. Hilgartner | 37 | Wife | — | Maryland |
| 2 | Jeanne M. Hilgartner | 8 | Daughter | — | Maryland |
| 3 | Beverly Hilgartner | 5 | Daughter | — | Maryland |
| 4 | Paul A. Bussalmasi | 40 | Head | Operator | Maryland |
| 5 | Helen E. Bussalmasi | 40 | Wife | — | Maryland |
| 6 | Karl A. Bussalmasi | 17 | Son | Laborer | Maryland |
| 7 | Philip R. Bussalmasi | 16 | Son | Clerk | Maryland |
| 8 | Alex G. Wolfe | 54 | Head | Laborer | Maryland |
| 9 | Clara R. Wolfe | 51 | Wife | — | Maryland |
| 10 | Glen R. Wolfe | 28 | Son | Gardener | Maryland |
| 11 | Wolfe | 34 | Daughter | Waitress | Maryland |
| 12 | Norman R. Wolfe | 8 | Grandson | — | Maryland |
| 13 | William R. Wolfe | 7 | Grandson | — | Maryland |
| 14 | Betty Ray Wolfe | 6 | Granddaughter | — | Maryland |
| 15 | Alvin Wolfe | 20 | Son | Truck Driver | Maryland |
| 16 | Charles E. Ham | 50 | Head | Operator | Maryland |
| 17 | Mary Ham | 50 | Wife | — | Maryland |
| 18 | Margaret Ham | 22 | Daughter | Office Worker | Maryland |
| 19 | Helen Ham | 18 | Daughter | — | Maryland |
| 20 | Marian Ham | 16 | Daughter | — | Maryland |
| 21 | Charles Ham | 14 | Son | — | Maryland |
| 22 | James Jackson | 83 | Lodger | — | Maryland |
| 23 | Margaret C. Ham | 53 | Head | — | Maryland |
| 24 | John Gross | 75 | Brother | — | Maryland |
| 25 | Carl H. Smith | 41 | Head | Operator | Maryland |
| 26 | William A. Smith | 39 | Brother | Operator | Maryland |
| 27 | William H. Cox | 63 | Head | — | Maryland |
| 28 | Naomi Cox | 60 | Wife | — | Maryland |
| 29 | William E. Cox THIS PERSON | 27 | Son | Truck Driver | Maryland |
| 30 | Olga Moyer | 26 | Daughter | — | Maryland |
| 31 | Joseph C. Milligan | 65 | Head | Operator | Maryland |
| 32 | Elizabeth Milligan | 65 | Wife | — | Maryland |
| 33 | Joseph Jr. Milligan | 24 | Son | Laborer | Maryland |
| 34 | Elizabeth C. Milligan | 21 | Daughter | — | Maryland |
| 35 | Milligan | 15 | Daughter | — | Maryland |
| 36 | Peter J. Milligan | 69 | Brother | — | Maryland |
| 37 | William R. German | 42 | Head | Operator | Maryland |
| 38 | Pauline R. German | 41 | Wife | — | Maryland |
| 39 | Lewis Jackson | 24 | Head | Laborer | Maryland |
| 40 | Laura Jackson | 25 | Wife | — | Maryland |
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)