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John William — 1940 US Census Record

Linked across censuses

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

Our Model Tree links this John William across the 1930 and 1940 US Censuses in Baltimore-City-County, Maryland (XGBoost, ~Confirmed) — first a son (b.~1927), then head of a 8-person household.

Age 13 b. ~1927 Male Son Born: Maryland Single

1940 Census Record Details

Census Year1940
LocationBaltimore-City-County, Maryland
SurnameWilliam
Given NameJohn
Relationship to HeadSon
SexM
Color / RaceBlack
Age13
Marital StatusSingle
BirthplaceMaryland
1935 Residence (City)Baltimore City
1935 Residence (County)Baltimore City
Additional Details
Highest GradeNo 3
1935 ResidenceSame place
Birth StateMaryland
Birth CountryUnited States
Birthplace (normalized)maryland
Township / WardBaltimore City
Est. Birth Year~1927

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.

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

Name Relation to head Relative to John Age Birth yr
Sarah William Head — 39 ~1901
Norman William Son — 18 ~1922
John William Son — 13 ~1927
Charles William Other — 6 ~1934
Geraldine William Daughter — 9 ~1931
Ida William Daughter — 11 ~1929
Ethel William Daughter — 25 ~1915
Gilbert William Son — 20 ~1920

Census Appearances

1930
Baltimore, Maryland
Other, age 4
Baltimore, Maryland · implied b. ~1926 — 9 household members
●  Primary link · ~Confirmed · 2 sources
XGBoost Household
Surname Whalen
Given Name John
Relationship to Head Grandson
Sex M
Color / Race Black
Age 4
Marital Status Single
Birthplace Maryland
Father's Birthplace Maryland
Mother's Birthplace Maryland
Birth State Maryland
Birth Country United States
Birthplace (normalized) maryland
1940
Baltimore-City-County, Maryland
Son, age 13
Baltimore-City-County, Maryland · implied b. ~1927 — 8 household members
Surname William
Given Name John
Relationship to Head Son
Sex M
Color / Race Black
Age 13
Marital Status Single
Birthplace Maryland
1935 Residence (City) Baltimore City
1935 Residence (County) Baltimore City
Highest Grade No 3
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.
Linked across censuses
Our Model Tree links John William across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John William
Son · 1940 · age 13 · b. ~1927 · Maryland
★ You are viewing this record
Sibling
Gilbert William
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ida William
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Geraldine William
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ethel William
Sibling · 1940 · age 25
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Norman William
Sibling · 1940 · age 18
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-t0627-01512-00571)

Line Name Age Relation Occupation Birthplace
1 Bessie Berman 63 Wife 5 Russia
2 Max Kessler 57 Boarder Presser Russia
3 Emory Ed Howard 72 Head — Maryland
4 John L Porter 40 Lodger Branchman S. Carolina
5 Mary Smith 39 Lodger — N. Carolina
6 Althea Jennings 29 Head — Virginia
7 May Jennings 6 Daughter — Maryland
8 Jean Jennings 3 Daughter — Maryland
9 John O. Wabby 29 Lodger Truck Helper Virginia
10 Grace Wabby 28 Lodger Maid Virginia
11 Sarah William 39 Head Seamstress Virginia
12 Ethel William 25 Daughter — Virginia
13 Gilbert William 20 Son Cleaner Virginia
14 Norman William 18 Son — Virginia
15 John William THIS PERSON 13 Son — Maryland
16 Ida M William 11 Daughter — Maryland
17 Geraldine William 9 Daughter — Maryland
18 Charles William 6 Grandson — Maryland
19 Robert Powell 28 Head Chauffeur N. Carolina
20 Effie Powell 25 Wife — Maryland
21 Charles Cotton 21 Head Wheel Barrow Man Pennsylvania
22 Irene Cotton 23 Wife — Maryland
23 Marian Cotton 3 Daughter — Maryland
24 Emma Cotton 2 Daughter — Maryland
25 Charles Jr Cotton 0 Son — Maryland
26 Norman Owen 32 Head Branchman Virginia
27 John Handy 32 Partner Sweeper Maryland
28 Maggie Johnson 59 Head — Maryland
29 Harry William Johnson 13 Grandson — Maryland
30 Walter L Johnson 11 Grandson — Maryland
31 Cecil Johnson 10 Grandson — Maryland
32 Elmer January 35 Head — Maryland
33 Sophie January 38 Wife — Maryland
34 John January 13 Son — Maryland
35 Marie January 12 Daughter — Maryland
36 Elizabeth January 10 Daughter — Maryland
37 John Langston 36 Head Chauffeur Virginia
38 Della Pickson 38 Lodger Millie Maryland
39 Frank Frier 38 Lodger Foundry Virginia
40 Samuel Richards 38 Head Trucker N. Carolina

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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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