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John Keller — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Baltimore-City-County, Maryland
Our Model Tree links this John Keller across the 1930 and 1940 US Censuses in Baltimore-City-County, Maryland (XGBoost, ~Confirmed) — first a son (b.~1922), then head of a 8-person household.
Age 18
b. ~1922
Male
Son
Born: Maryland
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Baltimore-City-County, Maryland |
| Surname | Keller |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Baltimore city |
| 1935 Residence (County) | Baltimore City |
| Additional Details | |
| Occupation | Messenger |
| Industry | Telegraph |
| Class of Worker | PW |
| Hours Worked | 4 |
| Income (1939) | 180 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Occupation | Messenger |
| Township / Ward | Baltimore City |
| Est. Birth Year | ~1922 |
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 |
|---|---|---|---|---|
| Rita Keller | Daughter | — | 20 | ~1920 |
| Eleanor Keller | Daughter | — | 9 | ~1931 |
| Mary Keller | Daughter | — | 7 | ~1933 |
| Joseph Keller | Head | — | 58 | ~1882 |
| Joseph Keller | Son | — | 15 | ~1925 |
| John Keller | Son | — | 18 | ~1922 |
| Raymond Keller | Son | — | 13 | ~1927 |
| Ida Keller | Spouse | — | 47 | ~1893 |
Census Appearances
1930
Baltimore, Maryland
Son, age 8
Baltimore, Maryland · implied b. ~1922 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Keller |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 8 |
| 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 18
Baltimore-City-County, Maryland · implied b. ~1922 — 8 household members
| Surname | Keller |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Baltimore city |
| 1935 Residence (County) | Baltimore City |
| Occupation | Messenger |
| Industry | Telegraph |
| Class of Worker | PW |
| Hours Worked | 4 |
| Income (1939) | 180 |
| 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 Keller across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Keller
Son · 1940 · age 18 · b. ~1922 · Maryland
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Sibling
Joseph Keller
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Keller
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Rita Keller
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Raymond Keller
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Eleanor Keller
Sibling · 1940 · age 9
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-t0627-01511-00595)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Charles Wallace | 3 | Son | — | Virginia |
| 42 | Gene Wallace | 2 | Son | — | Virginia |
| 43 | Edward Wallace | 1 | Son | — | Maryland |
| 44 | Isaac Wallace | 44 | Father | Bus Boy | Virginia |
| 45 | David Kaplan | 60 | Head | Storekeeper | Russia |
| 46 | Joseph Kaplan | 25 | Son | Assistant Clerk | Maryland |
| 47 | Max Fineberg | 50 | Head | Storekeeper | Lithuania |
| 48 | Blanche Fineberg | 44 | Wife | Storekeeper | Lithuania |
| 49 | Russell Hammond | 43 | Head | Laborer | W. Virginia |
| 50 | Alice Hammond | 39 | Wife | — | W. Virginia |
| 51 | Leona Hammond | 17 | Daughter | — | W. Virginia |
| 52 | Maxine Hanna | 19 | Lodger | Nursemaid | W. Virginia |
| 53 | Annie Driscoll | 65 | Head | — | Virginia |
| 54 | Harry Driscoll | 35 | Son | Laborer | Maryland |
| 55 | Donald Driscoll | 26 | Son | Surface | Maryland |
| 56 | Joseph A. Keller | 58 | Head | Bricklayer | Maryland |
| 57 | Ida Keller | 47 | Wife | — | Maryland |
| 58 | Rita Keller | 20 | Daughter | Waitress | Maryland |
| 59 | John Keller THIS PERSON | 18 | Son | Messenger | Maryland |
| 60 | Joseph Keller | 15 | Son | New Worker | Maryland |
| 61 | Raymond Keller | 13 | Son | — | Maryland |
| 62 | Eleanor Keller | 9 | Daughter | — | Maryland |
| 63 | Mary Keller | 7 | Daughter | — | Maryland |
| 64 | Ella Delgado | 52 | Head | Packer | Maryland |
| 65 | John Delgado | 17 | Son | Tailor | Maryland |
| 66 | Dolores Delgado | 12 | Daughter | — | Maryland |
| 67 | Edward Podgurski | 23 | Son-in-law | Tailor | Maryland |
| 68 | Dorothy Podgurski | 23 | Daughter | Waitress | Maryland |
| 69 | Blanche Rosenthal | 34 | Head | Machine Operator | Pennsylvania |
| 70 | John H. Streater | 24 | Head | Porter | S. Carolina |
| 71 | Marie Streater | 22 | Wife | — | S. Carolina |
| 72 | Florence Freeman | 46 | Partner | Housework | S. Carolina |
| 73 | Louise Freeman | 17 | Partner | — | S. Carolina |
| 74 | Hyatt Flowers | 59 | Head | Plumber | Maryland |
| 75 | Emma V. Flowers | 58 | Wife | — | Maryland |
| 76 | Jane Flowers | 25 | Daughter | — | Virginia |
| 77 | Howard Flowers | 30 | Son | Plumber | Maryland |
| 78 | George Ries | 45 | Head | Butcher | Maryland |
| 79 | Mary Ries | 42 | Wife | — | Maryland |
| 80 | Otto Ries | 21 | Son | Laborer | Maryland |
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)