MJ
Marvin Johnson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Duval-County, Florida
Our Model Tree links this Marvin Johnson across the 1930 and 1940 US Censuses in Duval-County, Florida (XGBoost, ~Confirmed) — first a son (b.~1928), then head of a 10-person household.
Age 12
b. ~1928
Male
Son
Born: Florida
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Duval-County, Florida |
| Surname | Johnson |
| Given Name | Marvin |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Florida |
| 1935 Residence (City) | Precinct 29B |
| Additional Details | |
| Highest Grade | No 4 |
| 1935 Residence | Same house |
| Birth State | Florida |
| Birth Country | United States |
| Birthplace (normalized) | florida |
| Township / Ward | Precinct 29B |
| Est. Birth Year | ~1928 |
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 1940 census.
| Name | Relation to head | Relative to Marvin | Age | Birth yr |
|---|---|---|---|---|
| Grady Johnson | Head | — | 46 | ~1894 |
| Betty Johnson | Daughter | — | 4 | ~1936 |
| John Johnson | Son | — | 14 | ~1926 |
| Elmer Johnson | Son | — | 17 | ~1923 |
| Richard Johnson | Son | — | 6 | ~1934 |
| Elvira Johnson | Daughter | — | 9 | ~1931 |
| Susie Johnson | Spouse | — | 40 | ~1900 |
| Marvin Johnson | Son | — | 12 | ~1928 |
| Charles Johnson | Son | — | 3 | ~1937 |
| Ray Johnson | Daughter | — | 19 | ~1921 |
Census Appearances
1930
Duval, Florida
Son, age 2
Duval, Florida · implied b. ~1928 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Marvin E. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Florida |
| Father's Birthplace | Georgia |
| Mother's Birthplace | Georgia |
| Occupation | none |
| Birth State | Florida |
| Birth Country | United States |
| Birthplace (normalized) | florida |
1940
Duval-County, Florida
Son, age 12
Duval-County, Florida · implied b. ~1928 — 10 household members
| Surname | Johnson |
| Given Name | Marvin |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Florida |
| 1935 Residence (City) | Precinct 29B |
| Highest Grade | No 4 |
| 1935 Residence | Same house |
| Birth State | Florida |
| Birth Country | United States |
| Birthplace (normalized) | florida |
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 Marvin Johnson across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Marvin Johnson
Son · 1940 · age 12 · b. ~1928 · Florida
★ You are viewing this record
Sibling
Richard Johnson
Sibling · 1940 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Elmer Johnson
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Betty Johnson
Sibling · 1940 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Johnson
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ray Johnson
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Charles Johnson
Sibling · 1940 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Elvira Johnson
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 — 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-t0627-00584-00438)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Sylvia Stewart | 3 | Daughter | — | Florida |
| 42 | Carole Stewart | 0 | Daughter | — | Florida |
| 43 | Thaddeus Capps | 32 | Head | Milker | Virginia |
| 44 | Ellen Capps | 25 | Wife | — | Georgia |
| 45 | Lloyd North | 27 | Head | Truck Driver | Georgia |
| 46 | Marguerite North | 27 | Wife | — | Florida |
| 47 | Grady Johnson | 46 | Head | Dairy Foreman | Georgia |
| 48 | Susie Johnson | 40 | Wife | — | Georgia |
| 49 | Ray Johnson | 19 | Daughter | Milker | Georgia |
| 50 | Elmer Johnson | 17 | Son | — | Georgia |
| 51 | John Johnson | 14 | Son | — | Georgia |
| 52 | Marvin Johnson THIS PERSON | 12 | Son | — | Florida |
| 53 | Elvira Johnson | 9 | Daughter | — | Florida |
| 54 | Richard Johnson | 6 | Son | — | Florida |
| 55 | Betty Johnson | 4 | Daughter | — | Florida |
| 56 | Charles Johnson | 3 | Son | — | Florida |
| 57 | Lester Bryant | 49 | Head | Milker | Georgia |
| 58 | Susie Bryant | 48 | Wife | Servant | Georgia |
| 59 | Harry Bryant | 17 | Son | — | Florida |
| 60 | Henry Morton | 52 | Head | Laborer | Alabama |
| 61 | Timothy S. Pope | 27 | Head | Operator | Georgia |
| 62 | Gladys Pope | 39 | Wife | — | Georgia |
| 63 | Lester Branda | 22 | Nephew | Laborer | Georgia |
| 64 | George H. Downing | 27 | Head | Operator | Georgia |
| 65 | Mabell Downing | 22 | Wife | — | Georgia |
| 66 | John R. Downing | 5 | Son | — | Florida |
| 67 | Marvin Sherman | 19 | Lodger | Laborer | Florida |
| 68 | Henry W. Phelps | 42 | Head | Machinist | Florida |
| 69 | Thelma Phelps | 37 | Wife | — | Alabama |
| 70 | Mary F. Phelps | 17 | Daughter | — | Florida |
| 71 | Dorothy Phelps | 14 | Daughter | — | Florida |
| 72 | David Phelps | 12 | Son | — | Florida |
| 73 | Lina K. Blitch | 43 | Head | Superintendent | Tennessee |
| 74 | Annie R. Blitch | 44 | Employee | Assistant Supt. & Matron | Georgia |
| 75 | Cecilia W. Parsons | 57 | Employee | Matron | Florida |
| 76 | Virginia Barden | 10 | Inmate | — | Georgia |
| 77 | Hazel Barker | 16 | Inmate | — | Oklahoma |
| 78 | Christine Barnett | 8 | Inmate | — | Florida |
| 79 | Marie Barton | 15 | Inmate | — | 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)