Mary William — 1940 US Census Record

Linked across censuses

1940 United States Federal Census · Baltimore-City-County, Maryland

Our Model Tree links this Mary William across the 1930 and 1940 US Censuses in Baltimore-City-County, Maryland (XGBoost, ~Confirmed) — first a daughter (b.~1890), then head of a 5-person household.

Age 50 b. ~1890 Female Daughter Born: Maryland Married

1940 Census Record Details

Census Year	1940
Location	Baltimore-City-County, Maryland
Surname	William
Given Name	Mary
Relationship to Head	Daughter
Sex	F
Color / Race	Black
Age	50
Marital Status	Married
Birthplace	Maryland
1935 Residence (City)	Baltimore City
1935 Residence (County)	Baltimore City
Additional Details
Occupation	Tailor
Industry	Private res
Class of Worker	PW
Hours Worked	60
Income (1939)	450
Highest Grade	No 8
1935 Residence	Same place
Birth State	Maryland
Birth Country	United States
Birthplace (normalized)	maryland
Occupation	Tailor
Township / Ward	Baltimore City
Est. Birth Year	~1890

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.

5 people recorded at the same address in the 1940 census.

Name	Relation to head	Relative to Mary	Age	Birth yr
Carrie William	Daughter	—	37	~1903
John Brown	Head	—	69	~1871
Annie Brown	Spouse	—	70	~1870
Granville William	Other	—	50	~1890
Mary William	Daughter	—	50	~1890

Census Appearances

1930

Baltimore, Maryland

Head, age 42

Baltimore, Maryland · implied b. ~1888 — 3 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Williams
Given Name	Mary
Relationship to Head	Head
Sex	F
Color / Race	Black
Age	42
Marital Status	Widowed
Birthplace	Maryland
Age at First Marriage	17
Father's Birthplace	Maryland
Mother's Birthplace	Maryland
Occupation	Chef
Industry	Hotel
Class of Worker	W
Can Read/Write	Yes
Home Owned/Rented	R
Home Value / Rent	25
Radio Set	No
Birth State	Maryland
Birth Country	United States
Birthplace (normalized)	maryland

1940

Baltimore-City-County, Maryland

Daughter, age 50

Baltimore-City-County, Maryland · implied b. ~1890 — 5 household members

Surname	William
Given Name	Mary
Relationship to Head	Daughter
Sex	F
Color / Race	Black
Age	50
Marital Status	Married
Birthplace	Maryland
1935 Residence (City)	Baltimore City
1935 Residence (County)	Baltimore City
Occupation	Tailor
Industry	Private res
Class of Worker	PW
Hours Worked	60
Income (1939)	450
Highest Grade	No 8
1935 Residence	Same place
Birth State	Maryland
Birth Country	United States
Birthplace (normalized)	maryland

Model Tree

Linked across censuses

Our Model Tree links Mary William across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.

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This person

Anchor record

Mary William

Daughter · 1940 · age 50 · b. ~1890 · Maryland

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Sibling

Carrie William

Sibling · 1940 · age 37

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

Page Contents

40 people indexed on this census page (nara:1940:m-t0627-01523-00760)

Line	Name	Age	Relation	Occupation	Birthplace
41	John Brown	69	Head	—	Maryland
42	Annie Brown	70	Wife	—	Maryland
43	Mary William THIS PERSON	50	Daughter	Tailor	Maryland
44	Granville William	50	Son-in-law	Laborer	Maryland
45	Carrie William	37	Daughter	Maid	Maryland
46	Joseph Smith	44	Head	Janitor	New Jersey
47	Margaret Smith	45	Wife	Janitress	New Jersey
48	Ruth Hicks	12	Daughter	—	Maryland
49	Raymond Mckinney	33	Head	Cook	North Carolina
50	Ella R. Mckinney	37	Wife	Maid	North Carolina
51	Hazel Robinson	19	Sister	Maid	North Carolina
52	Judneac Norman	35	Head	Stevador	West India
53	Clyde Mcgee	51	Lodger	Stevador	North Carolina
54	Alonzo Hillard	35	Head	Social Worker	Manhattan
55	Celestine Hillard	35	Wife	Teacher	Maryland
56	Harry Jackson	42	Head	Chauffeur	Virginia
57	Reid M. Farrell	34	Head	Maid	Maryland
58	Ralph Brown	45	Lodger	—	Maryland
59	Maggie William	37	Head	Cook	South Carolina
60	Elizabeth William	23	Daughter	Cook	South Carolina
61	Minnie William	19	Daughter	Laborer	Maryland
62	Ethel Brown	27	Sister	Maid	South Carolina
63	Leroy Jr. Brown	12	Son	—	Maryland
64	Myrtle A. Brown	5	Daughter	—	Maryland
65	—	None	—	—	—
66	Beaver Minters	56	Head	—	Maryland
67	Florence Minters	53	Wife	—	Virginia
68	Charles Jones	34	Head	Clerk	Maryland
69	Carrie Jones	38	Wife	Maid	Maryland
70	Daniel Jones	34	Head	Cook	Virginia
71	Bettie Jones	23	Wife	Maid	Maryland
72	Floyd Mills	38	Head	Laborer	Virginia
73	Mary Mills	40	Wife	Maid	Virginia
74	George Harrison	50	Lodger	Waiter	Illinois
75	Thomas Rundall	38	Lodger	Cook	Virginia
76	Janis Rundall	27	Lodger	Clerk	Virginia
77	Clyde Tilly	64	Head	House Keep	Georgia
78	Minnie Tilly	34	Wife	Laborer	Georgia
79	Clifton White	26	Lodger	Laborer	Virginia
80	Freddie Hill	27	Lodger	Painter	Maryland

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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)

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