JB
John Brown — 1930 US Census Record
Model Tree available1930 United States Federal Census · Baltimore, Maryland
Our Model Tree links this John Brown across the 1910, 1920 and 1930 US Censuses in Baltimore, Maryland (XGBoost, ~Confirmed), with identified parents John & Winfield — first a son (b.~1909), then head of a 7-person household.
Age 21
b. ~1909
Male
Son
Born: Maryland
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Baltimore, Maryland |
| Surname | Brown |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Additional Details | |
| Occupation | Coal Trimmer |
| Industry | Steamboat |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Occupation | Coal Trimmer |
| Township / Ward | Baltimore City |
| Est. Birth Year | ~1909 |
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.
7 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Martha Brown | Daughter | — | 15 | ~1915 |
| Martha Brown | Daughter | — | 9 | ~1921 |
| Maggie Brown | Daughter | — | 13 | ~1917 |
| Lucille Brown | Daughter | — | 17 | ~1913 |
| John Brown | Head | — | 58 | ~1872 |
| John Brown | Son | — | 21 | ~1909 |
| William Brown | Son | — | 11 | ~1919 |
Census Appearances
1910
Baltimore, Maryland
Other, age 1
Baltimore, Maryland · implied b. ~1909 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Brown |
| Given Name | John |
| Relationship to Head | Boarder |
| Sex | M |
| Color / Race | Black |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1920
Baltimore, Maryland
Son, age 11
Baltimore, Maryland · implied b. ~1909 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Brown |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Occupation | Helper |
| Industry | Bakery |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1930
Baltimore, Maryland
Son, age 21
Baltimore, Maryland · implied b. ~1909 — 7 household members
| Surname | Brown |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Occupation | Coal Trimmer |
| Industry | Steamboat |
| Class of Worker | W |
| Can Read/Write | Yes |
| 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 Brown across 3 US Census years (1910, 1920 and 1930) in Baltimore, Maryland, using XGBoost record linkage. Identified parents: father John Brown (~0.92 confidence) and father Winfield Brown (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
John Brown
b. ~1872
Source father
● Household
· direct · ~0.92
Father
Winfield Brown
b. ~1882
Source father
● Household
· direct · ~0.92
This person
Anchor record
John Brown
Son · 1930 · age 21 · b. ~1909 · Maryland
★ You are viewing this record
Sibling
William Brown
Sibling · 1930 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Martha Brown
Sibling · 1930 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Maggie Brown
Sibling · 1930 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lucille Brown
Sibling · 1930 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Martha Brown
Sibling · 1930 · age 15
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
42 people indexed on this census page (ia:1930:15thcensus850unit:0651)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Emma Free | 12 | — | — | District of Columbia |
| 55 | John Robinson | 52 | Head | Laborer | Virginia |
| 56 | Henry Robinson | 32 | Head | Laborer | Maryland |
| 57 | Mary Robinson | 30 | Wife-H | — | Maryland |
| 58 | Charles Brown | 41 | Head | Laborer | Virginia |
| 59 | Mary Brown | 30 | Wife-H | — | North Carolina |
| 60 | James Brown | 12 | Son | — | Maryland |
| 61 | Cornelius Brown | 10 | Son | — | Maryland |
| 62 | Charlie Brown | 8 | Son | — | Maryland |
| 63 | Eugene Brown | 1 | Son | — | Maryland |
| 64 | Lulu Farrior | 40 | Boarder | Housework | Maryland |
| 65 | John Brown | 58 | Head | — | Virginia |
| 66 | John Brown THIS PERSON | 21 | Son | Coal Trimmer | Maryland |
| 67 | Lucille Brown | 17 | Daughter | Laundress | Maryland |
| 68 | Martha Brown | 15 | Daughter | Housework | North Carolina |
| 69 | Maggie Brown | 13 | Daughter | Servant | Virginia |
| 70 | William Brown | 11 | Son | Laborer | South Carolina |
| 71 | Martha Brown | 9 | Daughter | — | Maryland |
| 72 | Lizzie Williams | 40 | Head | Laborer | Maryland |
| 73 | William Williams | 20 | Son | Laborer | North Carolina |
| 74 | Willie Williams | 18 | Son | Laborer | South Carolina |
| 75 | Mary Williams | 16 | Daughter | — | South Carolina |
| 76 | James Williams | 14 | Son | Painter | North Carolina |
| 77 | Lizzie Williams | 12 | Daughter | — | North Carolina |
| 78 | John Williams | 4 | Son | Laborer | North Carolina |
| 79 | Mary Williams | 3 | Daughter | — | North Carolina |
| 80 | Anthony Ford | 47 | Head | Laborer | North Carolina |
| 81 | Howard Jackson | 26 | Boarder | Laborer | Maryland |
| 82 | Shirley Taylor | 26 | Boarder | Laborer | Virginia |
| 83 | Ida Jackson | 29 | Boarder | Servant | Virginia |
| 84 | Fred Douglas | 42 | Head | Laborer | Florida |
| 85 | Elizabeth Douglas | 37 | Wife-H | — | Maryland |
| 86 | Harold Provitt | 22 | Head | Laborer | Maryland |
| 87 | Minnie Provitt | 32 | Wife-H | — | Maryland |
| 88 | William Thomas | 11 | Step-son | — | Maryland |
| 89 | James King | 30 | Head | Laborer | Virginia |
| 90 | Helen King | 27 | Wife-H | — | Maryland |
| 91 | Hilda Berry | 18 | Sister-in-law | Assorter | Maryland |
| 92 | Henry Jackson | 55 | Boarder | Laborer | Virginia |
| 93 | Joseph Ferebee | 28 | Boarder | Laborer | Virginia |
| 94 | James Cohen | 65 | Head | Tailor | Russia |
| 95 | Samuel Cohen | 16 | Son | Laborer | Maryland |
Pedigree Summary
John + 5 siblings
Gen 1 · 2 parents
~0.92
Max depth 4 (1900–1950 window)
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)