Frank Thomas — 1940 US Census Record

Model Tree available

1940 United States Federal Census · Keokuk-County, Iowa

Our Model Tree links this Frank Thomas across the 1920, 1930 and 1940 US Censuses in Keokuk-County, Iowa (XGBoost, ~Confirmed), with identified parents Marietta & Ben — first a head (b.~1906), then head of a 4-person household.

Age 34 b. ~1906 Male Head Born: Iowa Married

1940 Census Record Details

Census Year	1940
Location	Keokuk-County, Iowa
Surname	Thomas
Given Name	Frank J.
Relationship to Head	head
Sex	M
Color / Race	White
Age	34
Marital Status	Married
Birthplace	Iowa
1935 Residence (City)	Washington Township
1935 Residence (County)	Keokuk
Additional Details
Occupation	farming
Industry	agriculture
Class of Worker	OA
Hours Worked	70
Income (1939)	240
Highest Grade	G 8
1935 Residence	Same place
Birth State	Iowa
Birth Country	United States
Birthplace (normalized)	iowa
Occupation	Farming
Township / Ward	Washington Township
Est. Birth Year	~1906

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 Frank	Age	Birth yr
Marcella Thomas	Daughter	—	7	~1933
Frank Thomas	Head	—	34	~1906
Marietta Thomas	Other	—	75	~1865
Margaret Thomas	Spouse	—	32	~1908

Census Appearances

1920

Keokuk, Iowa

Son, age 13

Keokuk, Iowa · implied b. ~1907 — 7 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Thomas
Given Name	Frank
Relationship to Head	Son
Sex	M
Color / Race	White
Age	13
Marital Status	Single
Birthplace	Iowa
Father's Birthplace	Pennsylvania
Mother's Birthplace	Illinois
Can Read	Yes
Can Write	Yes
Speaks English	Yes
Birth State	Iowa
Birth Country	United States
Birthplace (normalized)	iowa

1930

Keokuk, Iowa

Head, age 24

Keokuk, Iowa · implied b. ~1906 — 3 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Thomas
Given Name	Frank
Relationship to Head	Head
Sex	M
Color / Race	White
Age	24
Marital Status	Married
Birthplace	Iowa
Age at First Marriage	21
Father's Birthplace	Pennsylvania
Mother's Birthplace	Illinois
Occupation	Farmer
Industry	Genl Farm
Class of Worker	VVVV
Can Read/Write	Yes
Home Owned/Rented	R
Home Value / Rent	107
Radio Set	R
Veteran	No
Birth State	Iowa
Birth Country	United States
Birthplace (normalized)	iowa

1940

Keokuk-County, Iowa

Head, age 34

Keokuk-County, Iowa · implied b. ~1906 — 4 household members

Surname	Thomas
Given Name	Frank J.
Relationship to Head	head
Sex	M
Color / Race	White
Age	34
Marital Status	Married
Birthplace	Iowa
1935 Residence (City)	Washington Township
1935 Residence (County)	Keokuk
Occupation	farming
Industry	agriculture
Class of Worker	OA
Hours Worked	70
Income (1939)	240
Highest Grade	G 8
1935 Residence	Same place
Birth State	Iowa
Birth Country	United States
Birthplace (normalized)	iowa

Model Tree

Model Tree available

Our Model Tree links Frank Thomas across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Marietta Thomas (~0.92 confidence) and father Ben Thomas (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.

Show:

Gen 1 Parents confidence ≈ 0.92

Mother

Marietta Thomas

b. ~1865

Source mother

● Household · direct · ~0.92

Father

Ben Thomas

b. ~1867

Source father

● Household · direct · ~0.92

This person

Anchor record

Frank Thomas

Head · 1940 · age 34 · b. ~1906 · Iowa

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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 — Keokuk-County, Iowa Open full size

Page Contents

40 people indexed on this census page (nara:1940:m-t0627-01172-01140)

Line	Name	Age	Relation	Occupation	Birthplace
41	Mildred L. Ewing	32	wife	None	Iowa
42	Harry W. Ewing	12	son	—	Iowa
43	Junius T. Bradley	20	head	Farm Labour	Iowa
44	Lenora M. Bradley	18	wife	None	Iowa
45	Gerald L. Bradley	1	son	—	Iowa
46	Thomas J. Bradley	70	head	Farming	Illinois
47	Lily M. Bradley	64	wife	None	Iowa
48	Algood Dwight Bradley	6	son	—	Iowa
49	Bert Morrison	63	head	Farming	Iowa
50	Della Morrison	60	wife	None	Kansas
51	Frank C. Miller	60	head	Farming	Illinois
52	Ellen L. Miller	60	wife	None	Iowa
53	Frank Danner	58	head	Farming	Iowa
54	Lizzie M. Danner	57	wife	None	Iowa
55	Charles Reinert	70	head	Farming	Iowa
56	Jennie Reinert	61	wife	None	Iowa
57	William E. Lawrence	38	head	Farming	Iowa
58	Margaret A. Lawrence	39	wife	None	Iowa
59	Jack D. Lawrence	9	son	—	Iowa
60	Clarence E. Stein	41	head	Farming	Iowa
61	Lois Stein	38	wife	None	Iowa
62	Wallace D. Stein	16	son	None	Iowa
63	Abbie C. Dunn	75	mother	None	Iowa
64	John J. Garrett	49	head	Farming	Iowa
65	Eva L. Garrett	43	wife	None	Iowa
66	Lester L. Garrett	17	son	Farm Labour	Iowa
67	Eugene C. Garrett	15	son	Farm Labour	Iowa
68	Evalyn V. Garrett	13	daughter	—	Iowa
69	Frank J. Thomas THIS PERSON	34	head	Farming	Iowa
70	Margaret J. Thomas	32	wife	None	Iowa
71	Marcella L. Thomas	7	daughter	—	Iowa
72	Marietta Thomas	75	mother	None	Illinois
73	John Stevenson	65	head	Farming	Iowa
74	Ada Stevenson	63	wife	None	Illinois
75	Robert D. Riley	31	head	Farmer	Iowa
76	Emily Riley	30	wife	No	Illinois
77	Donald Riley	11	son	—	Illinois
78	Evelyn Riley	5	daughter	—	Iowa
79	Gertrude Riley	11	niece	—	Iowa
80	Nina Riley	9	niece	—	Iowa

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Pedigree Summary

Frank

Gen 1 · 2 parents ~0.92

Max depth 4 (1900–1950 window)

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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