JC
John Clarke — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Baltimore, Maryland
Our Model Tree links this John Clarke across the 1930 and 1940 US Censuses in Baltimore, Maryland (XGBoost, ~Confirmed) — first a son (b.~1911), then head of a 10-person household.
Age 19
b. ~1911
Male
Son
Born: Maryland
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Baltimore, Maryland |
| Surname | Clarke |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Additional Details | |
| Can Read/Write | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Township / Ward | Baltimore City |
| Est. Birth Year | ~1911 |
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.
10 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Dolores Clarke | Daughter | — | 4 | ~1926 |
| Joan Clarke | Daughter | — | 6 | ~1924 |
| Helen Clarke | Daughter | — | 13 | ~1917 |
| James Clarke | Head | — | 43 | ~1887 |
| James Clarke | Son | — | 16 | ~1914 |
| George Clarke | Son | — | 21 | ~1909 |
| Catherine Clarke | Daughter | — | 2 | ~1928 |
| Marie Clarke | Other | — | 41 | ~1889 |
| Marie Clarke | Daughter | — | 10 | ~1920 |
| John Clarke | Son | — | 19 | ~1911 |
Census Appearances
1930
Baltimore, Maryland
Son, age 19
Baltimore, Maryland · implied b. ~1911 — 10 household members
| Surname | Clarke |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 19 |
| 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-City-County, Maryland
Head, age 30
Baltimore-City-County, Maryland · implied b. ~1910 — 15 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Clark |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 30 |
| Marital Status | Married |
| Birthplace | Maryland |
| 1935 Residence (City) | Baltimore City |
| 1935 Residence (County) | Baltimore City |
| Class of Worker | No |
| 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 Clarke across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Clarke
Son · 1930 · age 19 · b. ~1911 · Maryland
★ You are viewing this record
Sibling
Joan Clarke
Sibling · 1930 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Dolores Clarke
Sibling · 1930 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
George Clarke
Sibling · 1930 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Helen Clarke
Sibling · 1930 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Clarke
Sibling · 1930 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Marie Clarke
Sibling · 1930 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Catherine Clarke
Sibling · 1930 · age 2
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
1930 US Federal Census — Baltimore, Maryland
Open full size
1930 US Federal Census — Baltimore, Maryland
Page Contents
50 people indexed on this census page (ia:1930:15thcensus852unit:0256)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Mary Dvorak | 21 | Daughter | — | Maryland |
| 52 | James A. Clarke | 43 | Head | Machinist | Maryland |
| 53 | Marie Clarke | 41 | Wife-H | — | Maryland |
| 54 | George Clarke | 21 | Son | — | Maryland |
| 55 | John Clarke THIS PERSON | 19 | Son | — | Maryland |
| 56 | James Jr. Clarke | 16 | Son | — | Maryland |
| 57 | Helen Clarke | 13 | Daughter | — | Maryland |
| 58 | Marie B. Clarke | 10 | Daughter | — | Maryland |
| 59 | Joan Clarke | 6 | Daughter | — | Maryland |
| 60 | Dolores Clarke | 4 | Daughter | — | Maryland |
| 61 | Catherine Clarke | 2 | Daughter | — | Maryland |
| 62 | John C. Keefe | 34 | Head | — | Maryland |
| 63 | Mary Keefe | 31 | Wife-H | — | Maryland |
| 64 | Marie Keefe | 9 | Daughter | — | Maryland |
| 65 | Ellen Keefe | 1 | Daughter | — | Maryland |
| 66 | Arthur Babel | 30 | Head | Painter | Maryland |
| 67 | Viola Babel | 27 | Wife-H | — | Maryland |
| 68 | Alfred Babel | 8 | Son | — | Maryland |
| 69 | Francis Babel | 6 | Daughter | — | Maryland |
| 70 | Viola Babel | 4 | Daughter | — | Maryland |
| 71 | Audrey Babel | 2 | Daughter | — | Maryland |
| 72 | Bernadine Babel | 0 | Daughter | — | Maryland |
| 73 | George W. Smith | 39 | Head | Driver | Maryland |
| 74 | Mary C. Smith | 39 | Wife-H | Dressmaker | Maryland |
| 75 | Catherine Smith | 22 | Daughter | Saleslady | Maryland |
| 76 | James Smith | 19 | Son | Printer | Maryland |
| 77 | Melvin Smith | 14 | Son | — | Maryland |
| 78 | Gordon Smith | 11 | Son | — | Maryland |
| 79 | William Smith | 6 | Son | — | Maryland |
| 80 | Doris Smith | 4 | Daughter | — | Maryland |
| 81 | Philip J. Smith | 60 | Head | — | Maryland |
| 82 | Etta J. Smith | 51 | Wife-H | — | Maryland |
| 83 | Philip Jr. Smith | 25 | Son | — | Maryland |
| 84 | James Smith | 22 | Son | — | Maryland |
| 85 | Dorothy Smith | 14 | Daughter | — | Maryland |
| 86 | Ruth Smith | 12 | Daughter | — | Maryland |
| 87 | Karl Smith | 13 | Son | — | Maryland |
| 88 | Elmer Fugate | 36 | Head | Plumber | Maryland |
| 89 | Catherine Fugate | 13 | Daughter | — | Maryland |
| 90 | Anna Fugate | 9 | Daughter | — | Maryland |
| 91 | Vernon Fugate | 7 | Son | — | Maryland |
| 92 | Evelyn Fugate | 6 | Daughter | — | Maryland |
| 93 | Howard Fugate | 3 | Son | — | Maryland |
| 94 | Lorraine Fugate | 2 | Daughter | — | Maryland |
| 95 | Vacant | None | — | — | — |
| 96 | Vacant | None | — | — | — |
| 97 | Vacant | None | — | — | — |
| 98 | John Kunkel | 48 | Head | Cutter | Maryland |
| 99 | Anna Kunkel | 13 | Daughter | — | Maryland |
| 100 | Oliver Freburger | 70 | Head | — | Maryland |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1930 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)