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Joseph Cox — 1940 US Census Record

Linked across censuses

1940 United States Federal Census · Duval-County, Florida

Our Model Tree links this Joseph Cox across the 1930 and 1940 US Censuses in Duval-County, Florida (XGBoost, ~Confirmed) — first a son (b.~1923), then head of a 8-person household.

Age 17 b. ~1923 Male Son Born: Florida Single

1940 Census Record Details

Census Year1940
LocationDuval-County, Florida
SurnameCox
Given NameJoseph
Relationship to HeadSon
SexM
Color / RaceBlack
Age17
Marital StatusSingle
BirthplaceFlorida
1935 Residence (City)Jacksonville
1935 Residence (County)Duval
Additional Details
OccupationDelivery Boy
IndustryRetail Grocery Store
Class of WorkerPW
Hours Worked52
Income (1939)432
Highest GradeNo 5
1935 ResidenceSame place
Birth StateFlorida
Birth CountryUnited States
Birthplace (normalized)florida
OccupationDelivery Boy
Township / WardJacksonville
Est. Birth Year~1923

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.

8 people recorded at the same address in the 1940 census.

Name Relation to head Relative to Joseph Age Birth yr
Eula Cox Spouse — 37 ~1903
Florence Cox Daughter — 1 ~1939
Mary Cox Daughter — 14 ~1926
Isaac Cox Head — 47 ~1893
Louise Cox Daughter — 10 ~1930
Joseph Cox Son — 17 ~1923
Althea Cox Daughter — 7 ~1933
Hillard Cox Son — 20 ~1920

Census Appearances

1930
Duval, Florida
Son, age 6
Duval, Florida · implied b. ~1924 — 6 household members
●  Primary link · ~Confirmed · 2 sources
XGBoost Household
Surname Cox
Given Name Joseph
Relationship to Head Son
Sex M
Color / Race Black
Age 6
Marital Status Single
Birthplace Florida
Father's Birthplace South Carolina
Mother's Birthplace Georgia
Birth State Florida
Birth Country United States
Birthplace (normalized) florida
1940
Duval-County, Florida
Son, age 17
Duval-County, Florida · implied b. ~1923 — 8 household members
Surname Cox
Given Name Joseph
Relationship to Head Son
Sex M
Color / Race Black
Age 17
Marital Status Single
Birthplace Florida
1935 Residence (City) Jacksonville
1935 Residence (County) Duval
Occupation Delivery Boy
Industry Retail Grocery Store
Class of Worker PW
Hours Worked 52
Income (1939) 432
Highest Grade No 5
1935 Residence Same 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.
Linked across censuses
Our Model Tree links Joseph Cox across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Joseph Cox
Son · 1940 · age 17 · b. ~1923 · Florida
★ You are viewing this record
Sibling
Althea Cox
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Florence Cox
Sibling · 1940 · age 1
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Hillard Cox
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Cox
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Louise Cox
Sibling · 1940 · age 10
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

Page Contents

39 people indexed on this census page (nara:1940:m-t0627-00626-00682)

Line Name Age Relation Occupation Birthplace
1 Nathan Brunson 17 Son Truck Driver Florida
2 Alford Ford 26 Son in law Yard Man Florida
3 Letha Ford 22 Daughter Maid Florida
4 Ruth Ford 6 Grand daughter — Florida
5 Roosevelt Ford 4 Grand son — Florida
6 Eddie Ford 2 Grand son — Florida
7 Flossie Person 40 Sister Laundress Florida
8 Lilly Walker 22 Neice Maid Florida
9 Pearlee Ragin 17 Neice — Florida
10 Willie Lee Ragin 9 Nephew — Florida
11 Will D Clevdon 27 Head Pole Cutter Georgia
12 Rosalee Clevdon 27 Wife — Georgia
13 Junior Clevdon 4 Son — Georgia
14 Ellawe Clevdon 1 Daughter — Georgia
15 Burnell Gibbs 30 Head Machine Operator Florida
16 Bernard Hampton 12 Son — Florida
17 Doris Wright 9 Daughter — Florida
18 Louis Hampton 2 Son — Florida
19 Maggie Low 59 Aunt — Florida
20 Lelia Clark 40 Head — Georgia
21 Isaac Cox 47 Head Laborer S Carolina
22 Eula Cox 37 Wife — Georgia
23 Hillard Cox 20 Son Barrel Roller Florida
24 Joseph Cox THIS PERSON 17 Son Delivery Boy Florida
25 Mary Cox 14 Daughter — Florida
26 Louise Cox 10 Daughter — Florida
27 Althea Cox 7 Daughter — Florida
28 Florence Cox 1 Daughter — Florida
29 Fred L Paul 35 Head Collector Florida
30 Mary Paul 70 Mother — Florida
31 Nathadial Paul 27 Son — Florida
32 Jerry Tennerson 38 Head Watchman Georgia
33 Anabelle Tennerson 15 Wife — Georgia
34 Anie M Tennerson 3 Daughter — Florida
35 Davy H Tennerson 12 Daughter — Florida
36 Frank V Cook 49 Head Grocery Store Operator Florida
37 Hildur Cook 45 Wife — Kansas
38 Frances Cook 21 Daughter Office Clerk Kansas
39 Lavise Cook 18 Daughter — Texas

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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)

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