JH
John Harper — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Duval-County, Florida
Our Model Tree links this John Harper across the 1930 and 1940 US Censuses in Duval-County, Florida (XGBoost, ~Confirmed) — first a son (b.~1929), then head of a 10-person household.
Age 11
b. ~1929
Male
Son
Born: Florida
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Duval-County, Florida |
| Surname | Harper |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Florida |
| 1935 Residence (City) | Some Place |
| 1935 Residence (County) | Some Place |
| Additional Details | |
| Highest Grade | No 6 |
| 1935 Residence | Some Place |
| Birth State | Florida |
| Birth Country | United States |
| Birthplace (normalized) | florida |
| Township / Ward | Jacksonville |
| Est. Birth Year | ~1929 |
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 John | Age | Birth yr |
|---|---|---|---|---|
| Willie Harper | Daughter | — | 13 | ~1927 |
| Angeline Harper | Daughter | — | 8 | ~1932 |
| Helen Harper | Daughter | — | 14 | ~1926 |
| Geneva Harper | Daughter | — | 5 | ~1935 |
| Elizabeth Harper | Daughter | — | 10 | ~1930 |
| Retha Harper | Daughter | — | 17 | ~1923 |
| Charles Harper | Head | — | 38 | ~1902 |
| Charles Harper | Son | — | 16 | ~1924 |
| John Harper | Son | — | 11 | ~1929 |
| Hattie Harper | Spouse | — | 35 | ~1905 |
Census Appearances
1930
Duval, Florida
Son, age 2
Duval, Florida · implied b. ~1928 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Harper |
| Given Name | John F |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Florida |
| Father's Birthplace | Florida |
| Mother's Birthplace | Florida |
| Birth State | Florida |
| Birth Country | United States |
| Birthplace (normalized) | florida |
1940
Duval-County, Florida
Son, age 11
Duval-County, Florida · implied b. ~1929 — 10 household members
| Surname | Harper |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Florida |
| 1935 Residence (City) | Some Place |
| 1935 Residence (County) | Some Place |
| Highest Grade | No 6 |
| 1935 Residence | Some Place |
| 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 John Harper across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Harper
Son · 1940 · age 11 · b. ~1929 · Florida
★ You are viewing this record
Sibling
Charles Harper
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Elizabeth Harper
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Helen Harper
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Willie Harper
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Geneva Harper
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Angeline Harper
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Retha Harper
Sibling · 1940 · age 17
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
40 people indexed on this census page (nara:1940:m-t0627-00624-00879)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Theodore Graham | 5 | Son | — | Florida |
| 42 | Earl Alston | 40 | Head | Teacher | South Carolina |
| 43 | Tolbert Jackson | 22 | Ad Son | Teacher | Florida |
| 44 | Jeremiah Alston | 68 | Father | — | South Carolina |
| 45 | Elzie Hawkins | 45 | Head | Common Laborer | Georgia |
| 46 | Estella Hawkins | 44 | Wife | — | Georgia |
| 47 | Henry Hawkins | 15 | Son | — | Georgia |
| 48 | Rubin Walker | 71 | Head | — | Georgia |
| 49 | Sarah Walker | 70 | Wife | Laundress | Georgia |
| 50 | Ruby Benthome | 22 | Daughter | Teacher | Florida |
| 51 | Howell Whitehurst | 19 | Ad Grandson | — | Florida |
| 52 | C. Conant Carter | 52 | Head | Elevator Operator | Florida |
| 53 | Rachel Carter | 44 | Wife | — | Georgia |
| 54 | Earl Carter | 11 | Son | — | Florida |
| 55 | Rosalie Carter | 13 | Daughter | — | North Carolina |
| 56 | Mattie Jackson | 33 | Head | — | South Carolina |
| 57 | Ola Robert | 31 | Daughter | Housekeeper | South Carolina |
| 58 | Margaret Robert | 14 | Daughter | — | New Jersey |
| 59 | Willie Robert | 12 | Grand-son | — | Florida |
| 60 | Jason Robert | 9 | Grand-son | — | Florida |
| 61 | Charles Harper | 38 | Head | Truck Driver | Florida |
| 62 | Hattie Harper | 35 | Wife | — | Florida |
| 63 | Retha Mae Harper | 17 | Daughter | — | Florida |
| 64 | Charles Jr. Harper | 16 | Son | Delivery Boy | Florida |
| 65 | Helen Harper | 14 | Daughter | — | Florida |
| 66 | Willie Mae Harper | 13 | Daughter | — | Florida |
| 67 | John Harper THIS PERSON | 11 | Son | — | Florida |
| 68 | Elizabeth Harper | 10 | Daughter | — | Florida |
| 69 | Angeline Harper | 8 | Daughter | — | Florida |
| 70 | Geneva Harper | 5 | Daughter | — | Florida |
| 71 | Jacob Smith | 38 | Head | Painter | Alabama |
| 72 | Annie Smith | 32 | Wife | Maid | Alabama |
| 73 | Edgar Smith | 12 | Son | — | Alabama |
| 74 | Curtis Smith | 11 | Son | — | Alabama |
| 75 | William Smith | 10 | Son | — | Alabama |
| 76 | Franklin Smith | 7 | Son | — | Alabama |
| 77 | Mose Alexander | 34 | Brother-in-law | Painter | Alabama |
| 78 | Lenore Alexander | 24 | Sister-in-law | — | Alabama |
| 79 | Mose Jr. Alexander | 7 | Nephew | — | Alabama |
| 80 | Betty Alexander | 6 | Neice | — | Alabama |
Related Census Records
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)