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John Brown — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Duval-County, Florida
Our Model Tree links this John Brown across the 1910, 1920, 1930 and 1940 US Censuses in Duval-County, Florida (XGBoost, ~Confirmed) — first a head (b.~1889), then head of a 3-person household.
Age 51
b. ~1889
Male
Head
Born: S. Carolina
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Duval-County, Florida |
| Surname | Brown |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | Black |
| Age | 51 |
| Marital Status | Married |
| Birthplace | S. Carolina |
| 1935 Residence (City) | Jacksonville |
| 1935 Residence (County) | Duval |
| Additional Details | |
| Occupation | Laborer |
| Industry | Termine Co |
| Class of Worker | PW |
| Hours Worked | 42 |
| Income (1939) | 988 |
| Highest Grade | 3 |
| 1935 Residence | Same place |
| Birthplace (normalized) | s carolina |
| Occupation | Laborer |
| Township / Ward | Jacksonville |
| Est. Birth Year | ~1889 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| John Brown | Head | — | 51 | ~1889 |
| Johnny Brown | Son | — | 25 | ~1915 |
| Missouri Brown | Spouse | — | 48 | ~1892 |
Census Appearances
1910
Duval, Florida
Head, age 24
Duval, Florida · implied b. ~1886 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Brown |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | Black |
| Age | 24 |
| Marital Status | Married |
| Birthplace | S. Carolina |
| Years Married | 1 |
| Father's Birthplace | S. Carolina |
| Mother's Birthplace | S. Carolina |
| Occupation | Fireman |
| Industry | House |
| Birthplace (normalized) | s carolina |
1920
Duval, Florida
Head, age 33
Duval, Florida · implied b. ~1887 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Brown |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | Black |
| Age | 33 |
| Marital Status | Married |
| Birthplace | S. Carolina |
| Father's Birthplace | S. Carolina |
| Mother's Birthplace | S. Carolina |
| Occupation | Fireman |
| Industry | Steamboat |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Home Owned/Rented | R |
| Birthplace (normalized) | s carolina |
1930
Duval, Florida
Head, age 39
Duval, Florida · implied b. ~1891 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Brown |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | Black |
| Age | 39 |
| Marital Status | Married |
| Birthplace | S. Carolina |
| Father's Birthplace | S. Carolina |
| Mother's Birthplace | S. Carolina |
| Occupation | Baggage Porter |
| Industry | Railway Steam |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 18 |
| Birthplace (normalized) | s carolina |
1940
Duval-County, Florida
Head, age 51
Duval-County, Florida · implied b. ~1889 — 3 household members
| Surname | Brown |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | Black |
| Age | 51 |
| Marital Status | Married |
| Birthplace | S. Carolina |
| 1935 Residence (City) | Jacksonville |
| 1935 Residence (County) | Duval |
| Occupation | Laborer |
| Industry | Termine Co |
| Class of Worker | PW |
| Hours Worked | 42 |
| Income (1939) | 988 |
| Highest Grade | 3 |
| 1935 Residence | Same place |
| Birthplace (normalized) | s carolina |
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 4 US Census years (1910, 1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
John Brown
Head · 1940 · age 51 · b. ~1889 · Florida
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Duval-County, Florida
Open full size
1940 US Federal Census — Duval-County, Florida
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-00625-00397)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Ruth Walker | 41 | Lodger | Maid | Mississippi |
| 2 | Evelyn Palmer | 1 | Daughter | — | Mississippi |
| 3 | Ida Parker | 36 | Head | Maid | Georgia |
| 4 | John Parker | 19 | Son | Watchman | Georgia |
| 5 | Otis Foster | 20 | Brother | Watchman | Georgia |
| 6 | Mattie Bell | 69 | Head | Laundry | Georgia |
| 7 | Tom Weaver | 37 | Head | Driver | Tennessee |
| 8 | Charity Weaver | 28 | Wife | Laundry | Florida |
| 9 | Eugene Thomas | 12 | Son | — | Florida |
| 10 | Ella Foster | 26 | Sister | Maid | Florida |
| 11 | Homer Mcknight | 46 | Head | Maid | S. Carolina |
| 12 | Jinnie Mcknight | 40 | Wife | Laborer | S. Carolina |
| 13 | Jerry Johnson | 36 | Head | Laborer | Georgia |
| 14 | Emma Johnson | 32 | Wife | Wash Clothes | Georgia |
| 15 | John Gattis | 37 | Head | — | Florida |
| 16 | Albert Thomas | 66 | Head | Proprietor | Georgia |
| 17 | Ella Reddick | 53 | Head | — | Florida |
| 18 | Elnora Mcclinton | 20 | Lodger | — | Florida |
| 19 | Charles Mack | 68 | Lodger | — | Georgia |
| 20 | Charlie Mcclinton | 35 | Lodger | Labor | Georgia |
| 21 | Clarence Gadist | 32 | Head | Cook | Georgia |
| 22 | Mae Gadist | 32 | Wife | — | Florida |
| 23 | Ivy Wilson | 13 | Daughter | — | Florida |
| 24 | Emma Mcbubba | 4 | Niece | — | Florida |
| 25 | Lois Mcbubba | 28 | Sister | Maid | Florida |
| 26 | John Butts | 42 | Head | Laborer | Georgia |
| 27 | Hattie Butts | 43 | Wife | — | Florida |
| 28 | Willie Frazier | 55 | Head | — | Georgia |
| 29 | Amanda Bryant | 36 | Daughter | Maid | Florida |
| 30 | Charlie Williams | 25 | Daughter | Maid | Florida |
| 31 | Lou Mcknight | 22 | Daughter | — | Florida |
| 32 | Mary Brown | 17 | Son | — | Florida |
| 33 | Eddie Williams | 5 | Son | — | Florida |
| 34 | Clifford Williams | 3 | Son | — | Florida |
| 35 | John Brown THIS PERSON | 51 | Head | Laborer | S. Carolina |
| 36 | Missouri Brown | 48 | Wife | — | S. Carolina |
| 37 | Johnny Brown | 25 | Son | Wood Cutter | S. Carolina |
| 38 | Annie Hartley | 27 | Head | Maid | S. Carolina |
| 39 | Leroy Hartley | 12 | Son | — | Florida |
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)