Isaac Thomas — 1940 US Census Record

Linked across censuses

1940 United States Federal Census · Duval-County, Florida

Our Model Tree links this Isaac Thomas across the 1920, 1930 and 1940 US Censuses in Duval-County, Florida (XGBoost, ~Confirmed) — first a head (b.~1898), then head of a 4-person household.

Age 42 b. ~1898 Male Head Born: Georgia Married

1940 Census Record Details

Census Year	1940
Location	Duval-County, Florida
Surname	Thomas
Given Name	Isaac F.
Relationship to Head	Head
Sex	M
Color / Race	White
Age	42
Marital Status	Married
Birthplace	Georgia
1935 Residence (City)	Jacksonville
1935 Residence (County)	Duval
Additional Details
Occupation	Bus Driver
Industry	Motor Transit
Class of Worker	PW
Hours Worked	54
Income (1939)	1680
Highest Grade	No 8
1935 Residence	Same Place
Birth State	Georgia
Birth Country	United States
Birthplace (normalized)	georgia
Occupation	Bus Driver
Township / Ward	Jacksonville
Est. Birth Year	~1898

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.

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

Name	Relation to head	Relative to Isaac	Age	Birth yr
Martha Thomas	Daughter	—	18	~1922
Isaac Thomas	Head	—	42	~1898
Henry Thomas	Son	—	2	~1938
Cora Thomas	Spouse	—	40	~1900

Census Appearances

1920

Duval, Florida

Head, age 25

Duval, Florida · implied b. ~1895 — 8 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Thomas
Given Name	Isaac
Relationship to Head	Head
Sex	M
Color / Race	Black
Age	25
Marital Status	Married
Birthplace	Georgia
Father's Birthplace	Georgia
Mother's Birthplace	Georgia
Occupation	Machinist Helper
Industry	Railroad Co
Class of Worker	W
Home Owned/Rented	R
Birth State	Georgia
Birth Country	United States
Birthplace (normalized)	georgia

1930

Duval, Florida

Head, age 33

Duval, Florida · implied b. ~1897 — 2 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Thomas
Given Name	Isaac
Relationship to Head	Head
Sex	M
Color / Race	Black
Age	33
Marital Status	Married
Birthplace	Georgia
Age at First Marriage	27
Father's Birthplace	Georgia
Mother's Birthplace	Georgia
Occupation	Truck Driver
Industry	At home
Class of Worker	W
Can Read/Write	Yes
Home Owned/Rented	R
Home Value / Rent	16.00
Birth State	Georgia
Birth Country	United States
Birthplace (normalized)	georgia

1940

Duval-County, Florida

Head, age 42

Duval-County, Florida · implied b. ~1898 — 4 household members

Surname	Thomas
Given Name	Isaac F.
Relationship to Head	Head
Sex	M
Color / Race	White
Age	42
Marital Status	Married
Birthplace	Georgia
1935 Residence (City)	Jacksonville
1935 Residence (County)	Duval
Occupation	Bus Driver
Industry	Motor Transit
Class of Worker	PW
Hours Worked	54
Income (1939)	1680
Highest Grade	No 8
1935 Residence	Same Place
Birth State	Georgia
Birth Country	United States
Birthplace (normalized)	georgia

Model Tree

Linked across censuses

Our Model Tree links Isaac Thomas across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.

Show:

This person

Anchor record

Isaac Thomas

Head · 1940 · age 42 · b. ~1898 · Florida

★ You are viewing this record

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-t0627-00627-00036)

Line	Name	Age	Relation	Occupation	Birthplace
1	Laura Merrick	59	Wife	—	Indiana
2	Harold O. Merrick	30	Son	Operator	Illinois
3	Ellis Eilenfield	35	Head	Bus Driver	Florida
4	Sue Eilenfield	28	Wife	—	Alabama
5	Betty Sue Eilenfield	10	Daughter	—	Ohio
6	Ellis Jr. Eilenfield	9	Son	—	Florida
7	Barbara Ann Eilenfield	6	Daughter	—	Florida
8	Isaac F. Thomas THIS PERSON	42	Head	Bus Driver	Georgia
9	Cora L. Thomas	40	Wife	—	Georgia
10	Martha C. Thomas	18	Daughter	—	Georgia
11	Henry B. Thomas	2	Son	—	Florida
12	Quinton Ford	55	Head	Painter	Tennessee
13	Trixie Ford	54	Wife	—	Alabama
14	Brooks Griffin	39	Head	Bus Driver	Florida
15	Frances Griffin	32	Wife	—	Florida
16	Bernice Griffin	15	Daughter	—	Florida
17	William Griffin	6	Son	—	Florida
19	Harold Haskell	36	Head	Teacher	Massachusetts
20	Gwendolyn Haskell	33	Wife	—	Florida
21	Harold Jr. Haskell	5	Son	—	Florida
22	W. R. De More	55	Head	Clerk	Georgia
23	Henry T. Webb	32	Head	Sandwich Business	Florida
24	Adella Webb	31	Wife	—	Florida
25	Mary Jane Webb	7	Daughter	—	Florida
26	Henry T. Jr. Webb	3	Son	—	Florida
27	Joseph C. Ponder	32	Head	Cable Repairman	Georgia
28	Clara M. Ponder	25	Wife	—	Georgia
29	Peggy Ann Ponder	4	Daughter	—	Georgia
30	Martha Ponder	3	Daughter	—	Florida
31	Larry Ponder	1	Son	—	Florida
32	Lena Ponder	27	Sister	Clerk	Georgia
33	Louise Ponder	25	Sister	Operator	Georgia
34	Kathleen Ponder	21	Sister	Cashier	Georgia
35	Raleigh Allen	25	Head	Make-Up Man	Georgia
36	Florence Allen	22	Wife	—	Georgia
37	Edward Norden	45	Head	Druggist	New York
38	Florence Norden	44	Wife	—	Georgia
39	Albert B. Clements	49	Head	Mechanic	Georgia
40	Connie Clements	44	Wife	—	Georgia

Search for Isaac Thomas

All Isaac Thomas Census Records Discover Thomas Family Tree

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)

Report inaccurate data